def main():
logging.basicConfig()
##########################################
#Import necessary modules
##########################################
# This is assuming that worker.py is at a path ending in "/toil/worker.py".
sourcePath = os.path.dirname(os.path.dirname(__file__))
if sourcePath not in sys.path:
sys.path.append(sourcePath)
#Now we can import all the necessary functions
from toil.lib.bioio import setLogLevel
from toil.lib.bioio import getTotalCpuTime
from toil.lib.bioio import getTotalCpuTimeAndMemoryUsage
from toil.lib.bioio import makePublicDir
from toil.lib.bioio import system
from toil.common import loadJobStore
from toil.job import Job
##########################################
#Input args
##########################################
jobStoreString = sys.argv[1]
jobStoreID = sys.argv[2]
##########################################
#Load the jobStore/config file
##########################################
jobStore = loadJobStore(jobStoreString)
config = jobStore.config
##########################################
#Create the worker killer, if requested
##########################################
if config.badWorker > 0 and random.random() < config.badWorker:
def badWorker():
#This will randomly kill the worker process at a random time
time.sleep(config.badWorkerFailInterval * random.random())
os.kill(os.getpid(), signal.SIGKILL) #signal.SIGINT)
#TODO: FIX OCCASIONAL DEADLOCK WITH SIGINT (tested on single machine)
t = Thread(target=badWorker)
t.daemon = True
t.start()
##########################################
#Load the environment for the jobWrapper
##########################################
#First load the environment for the jobWrapper.
with jobStore.readSharedFileStream("environment.pickle") as fileHandle:
environment = cPickle.load(fileHandle)
for i in environment:
if i not in ("TMPDIR", "TMP", "HOSTNAME", "HOSTTYPE"):
os.environ[i] = environment[i]
# sys.path is used by __import__ to find modules
if "PYTHONPATH" in environment:
for e in environment["PYTHONPATH"].split(':'):
if e != '':
sys.path.append(e)
setLogLevel(config.logLevel)
tempRootDir = config.workDir
if tempRootDir is not None and not os.path.exists(tempRootDir):
raise RuntimeError("The temporary directory specified by workDir: %s does not exist" % tempRootDir)
##########################################
#Setup the temporary directories.
##########################################
#Dir to put all the temp files in. If tempRootDir is None, tempdir looks at environment variables to determine
# where to put the tempDir.
localWorkerTempDir = tempfile.mkdtemp(dir=tempRootDir)
os.chmod(localWorkerTempDir, 0755)
##########################################
#Setup the logging
##########################################
#This is mildly tricky because we don't just want to
#redirect stdout and stderr for this Python process; we want to redirect it
#for this process and all children. Consequently, we can't just replace
#sys.stdout and sys.stderr; we need to mess with the underlying OS-level
#file descriptors. See <http://stackoverflow.com/a/11632982/402891>
#When we start, standard input is file descriptor 0, standard output is
#file descriptor 1, and standard error is file descriptor 2.
#What file do we want to point FDs 1 and 2 to?
tempWorkerLogPath = os.path.join(localWorkerTempDir, "worker_log.txt")
#Save the original stdout and stderr (by opening new file descriptors to the
#same files)
origStdOut = os.dup(1)
origStdErr = os.dup(2)
#Open the file to send stdout/stderr to.
logFh = os.open(tempWorkerLogPath, os.O_WRONLY | os.O_CREAT | os.O_APPEND)
#Replace standard output with a descriptor for the log file
os.dup2(logFh, 1)
#Replace standard error with a descriptor for the log file
os.dup2(logFh, 2)
#Since we only opened the file once, all the descriptors duped from the
#original will share offset information, and won't clobber each others'
#writes. See <http://stackoverflow.com/a/5284108/402891>. This shouldn't
#matter, since O_APPEND seeks to the end of the file before every write, but
#maybe there's something odd going on...
#Close the descriptor we used to open the file
os.close(logFh)
for handler in list(logger.handlers): #Remove old handlers
logger.removeHandler(handler)
#Add the new handler. The sys.stderr stream has been redirected by swapping
#the file descriptor out from under it.
logger.addHandler(logging.StreamHandler(sys.stderr))
debugging = logging.getLogger().isEnabledFor(logging.DEBUG)
##########################################
#Worker log file trapped from here on in
##########################################
workerFailed = False
statsDict = MagicExpando()
messages = []
blockFn = lambda : True
cleanCacheFn = lambda x : True
try:
#Put a message at the top of the log, just to make sure it's working.
print "---TOIL WORKER OUTPUT LOG---"
sys.stdout.flush()
#Log the number of open file descriptors so we can tell if we're leaking
#them.
logger.debug("Next available file descriptor: {}".format(
nextOpenDescriptor()))
##########################################
#Load the jobWrapper
##########################################
jobWrapper = jobStore.load(jobStoreID)
logger.debug("Parsed jobWrapper")
##########################################
#Cleanup from any earlier invocation of the jobWrapper
##########################################
if jobWrapper.command == None:
while len(jobWrapper.stack) > 0:
jobs = jobWrapper.stack[-1]
#If the jobs still exist they have not been run, so break
if jobStore.exists(jobs[0][0]):
break
#However, if they are gone then we can remove them from the stack.
#This is the only way to flush successors that have previously been run
#, as jobs are, as far as possible, read only in the leader.
jobWrapper.stack.pop()
#This cleans the old log file which may
#have been left if the jobWrapper is being retried after a jobWrapper failure.
oldLogFile = jobWrapper.logJobStoreFileID
jobWrapper.logJobStoreFileID = None
jobStore.update(jobWrapper) #Update first, before deleting the file
if oldLogFile != None:
jobStore.delete(oldLogFile)
#Make a temporary file directory for the jobWrapper
localTempDir = makePublicDir(os.path.join(localWorkerTempDir, "localTempDir"))
##########################################
#Setup the stats, if requested
##########################################
if config.stats:
startTime = time.time()
startClock = getTotalCpuTime()
startTime = time.time()
while True:
##########################################
#Run the jobWrapper, if there is one
##########################################
if jobWrapper.command != None:
if jobWrapper.command.startswith( "_toil " ):
#Load the job
job = Job._loadJob(jobWrapper.command, jobStore)
#Cleanup the cache from the previous job
cleanCacheFn(job.effectiveRequirements(jobStore.config).cache)
#Create a fileStore object for the job
fileStore = Job.FileStore(jobStore, jobWrapper, localTempDir,
blockFn)
#Get the next block function and list that will contain any messages
blockFn = fileStore._blockFn
messages = fileStore.loggingMessages
job._execute(jobWrapper=jobWrapper,
stats=statsDict if config.stats else None,
localTempDir=localTempDir,
jobStore=jobStore,
fileStore=fileStore)
#Set the clean cache function
cleanCacheFn = fileStore._cleanLocalTempDir
else: #Is another command (running outside of jobs may be deprecated)
#Cleanup the cache from the previous job
cleanCacheFn(0)
system(jobWrapper.command)
#Set a dummy clean cache fn
cleanCacheFn = lambda x : None
else:
#The command may be none, in which case
#the jobWrapper is either a shell ready to be deleted or has
#been scheduled after a failure to cleanup
break
if Job.FileStore._terminateEvent.isSet():
raise RuntimeError("The termination flag is set")
##########################################
#Establish if we can run another jobWrapper within the worker
##########################################
#No more jobs to run so quit
if len(jobWrapper.stack) == 0:
break
#Get the next set of jobs to run
jobs = jobWrapper.stack[-1]
assert len(jobs) > 0
#If there are 2 or more jobs to run in parallel we quit
if len(jobs) >= 2:
logger.debug("No more jobs can run in series by this worker,"
" it's got %i children", len(jobs)-1)
break
#We check the requirements of the jobWrapper to see if we can run it
#within the current worker
successorJobStoreID, successorMemory, successorCores, successorsDisk, successorPredecessorID = jobs[0]
if successorMemory > jobWrapper.memory:
logger.debug("We need more memory for the next jobWrapper, so finishing")
break
if successorCores > jobWrapper.cores:
logger.debug("We need more cores for the next jobWrapper, so finishing")
break
if successorsDisk > jobWrapper.disk:
logger.debug("We need more disk for the next jobWrapper, so finishing")
break
if successorPredecessorID != None:
logger.debug("The jobWrapper has multiple predecessors, we must return to the leader.")
break
##########################################
#We have a single successor jobWrapper.
#We load the successor jobWrapper and transplant its command and stack
#into the current jobWrapper so that it can be run
#as if it were a command that were part of the current jobWrapper.
#We can then delete the successor jobWrapper in the jobStore, as it is
#wholly incorporated into the current jobWrapper.
##########################################
#Clone the jobWrapper and its stack
jobWrapper = copy.deepcopy(jobWrapper)
#Remove the successor jobWrapper
jobWrapper.stack.pop()
#Load the successor jobWrapper
successorJob = jobStore.load(successorJobStoreID)
#These should all match up
assert successorJob.memory == successorMemory
assert successorJob.cores == successorCores
assert successorJob.predecessorsFinished == set()
assert successorJob.predecessorNumber == 1
assert successorJob.command != None
assert successorJobStoreID == successorJob.jobStoreID
#Transplant the command and stack to the current jobWrapper
jobWrapper.command = successorJob.command
jobWrapper.stack += successorJob.stack
assert jobWrapper.memory >= successorJob.memory
assert jobWrapper.cores >= successorJob.cores
#Build a fileStore to update the job
fileStore = Job.FileStore(jobStore, jobWrapper, localTempDir, blockFn)
#Update blockFn
blockFn = fileStore._blockFn
#Add successorJob to those to be deleted
fileStore.jobsToDelete.add(successorJob.jobStoreID)
#This will update the job once the previous job is done
fileStore._updateJobWhenDone()
#Clone the jobWrapper and its stack again, so that updates to it do
#not interfere with this update
jobWrapper = copy.deepcopy(jobWrapper)
logger.debug("Starting the next jobWrapper")
##########################################
#Finish up the stats
##########################################
if config.stats:
totalCPUTime, totalMemoryUsage = getTotalCpuTimeAndMemoryUsage()
statsDict.workers.time = str(time.time() - startTime)
statsDict.workers.clock = str(totalCPUTime - startClock)
statsDict.workers.memory = str(totalMemoryUsage)
statsDict.workers.log = messages
logger.info("Finished running the chain of jobs on this node, we ran for a total of %f seconds", time.time() - startTime)
##########################################
#Trapping where worker goes wrong
##########################################
except: #Case that something goes wrong in worker
traceback.print_exc()
logger.error("Exiting the worker because of a failed jobWrapper on host %s", socket.gethostname())
Job.FileStore._terminateEvent.set()
##########################################
#Wait for the asynchronous chain of writes/updates to finish
##########################################
blockFn()
##########################################
#All the asynchronous worker/update threads must be finished now,
#so safe to test if they completed okay
##########################################
if Job.FileStore._terminateEvent.isSet():
jobWrapper = jobStore.load(jobStoreID)
jobWrapper.setupJobAfterFailure(config)
workerFailed = True
##########################################
#Cleanup
##########################################
#Close the worker logging
#Flush at the Python level
sys.stdout.flush()
sys.stderr.flush()
#Flush at the OS level
os.fsync(1)
os.fsync(2)
#Close redirected stdout and replace with the original standard output.
os.dup2(origStdOut, 1)
#Close redirected stderr and replace with the original standard error.
os.dup2(origStdOut, 2)
#sys.stdout and sys.stderr don't need to be modified at all. We don't need
#to call redirectLoggerStreamHandlers since they still log to sys.stderr
#Close our extra handles to the original standard output and standard error
#streams, so we don't leak file handles.
os.close(origStdOut)
os.close(origStdErr)
#Now our file handles are in exactly the state they were in before.
#Copy back the log file to the global dir, if needed
if workerFailed:
truncateFile(tempWorkerLogPath)
jobWrapper.logJobStoreFileID = jobStore.writeFile( tempWorkerLogPath, jobWrapper.jobStoreID )
os.remove(tempWorkerLogPath)
jobStore.update(jobWrapper)
elif debugging: # write log messages
truncateFile(tempWorkerLogPath)
with open(tempWorkerLogPath, 'r') as logFile:
logMessages = logFile.read().splitlines()
statsDict.logs = [Expando(jobStoreID=jobStoreID,text=logMessage) for logMessage in logMessages]
if (debugging or config.stats or messages) and not workerFailed: # We have stats/logging to report back
jobStore.writeStatsAndLogging(json.dumps(statsDict))
#Remove the temp dir
shutil.rmtree(localWorkerTempDir)
#This must happen after the log file is done with, else there is no place to put the log
if (not workerFailed) and jobWrapper.command == None and len(jobWrapper.stack) == 0:
#We can now safely get rid of the jobWrapper
jobStore.delete(jobWrapper.jobStoreID)
def workerScript(jobStore,
config,
jobName,
jobStoreID,
redirectOutputToLogFile=True):
"""
Worker process script, runs a job.
:param str jobName: The "job name" (a user friendly name) of the job to be run
:param str jobStoreLocator: Specifies the job store to use
:param str jobStoreID: The job store ID of the job to be run
:param bool redirectOutputToLogFile: Redirect standard out and standard error to a log file
"""
logging.basicConfig()
##########################################
#Create the worker killer, if requested
##########################################
logFileByteReportLimit = config.maxLogFileSize
if config.badWorker > 0 and random.random() < config.badWorker:
def badWorker():
#This will randomly kill the worker process at a random time
time.sleep(config.badWorkerFailInterval * random.random())
os.kill(os.getpid(), signal.SIGKILL) #signal.SIGINT)
#TODO: FIX OCCASIONAL DEADLOCK WITH SIGINT (tested on single machine)
t = Thread(target=badWorker)
# Ideally this would be a daemon thread but that causes an intermittent (but benign)
# exception similar to the one described here:
# http://stackoverflow.com/questions/20596918/python-exception-in-thread-thread-1-most-likely-raised-during-interpreter-shutd
# Our exception is:
# Exception in thread Thread-1 (most likely raised during interpreter shutdown):
# <type 'exceptions.AttributeError'>: 'NoneType' object has no attribute 'kill'
# This attribute error is caused by the call os.kill() and apparently unavoidable with a
# daemon
t.start()
##########################################
#Load the environment for the jobGraph
##########################################
#First load the environment for the jobGraph.
with jobStore.readSharedFileStream("environment.pickle") as fileHandle:
environment = safeUnpickleFromStream(fileHandle)
for i in environment:
if i not in ("TMPDIR", "TMP", "HOSTNAME", "HOSTTYPE"):
os.environ[i] = environment[i]
# sys.path is used by __import__ to find modules
if "PYTHONPATH" in environment:
for e in environment["PYTHONPATH"].split(':'):
if e != '':
sys.path.append(e)
setLogLevel(config.logLevel)
toilWorkflowDir = Toil.getWorkflowDir(config.workflowID, config.workDir)
##########################################
#Setup the temporary directories.
##########################################
# Dir to put all this worker's temp files in.
localWorkerTempDir = tempfile.mkdtemp(dir=toilWorkflowDir)
os.chmod(localWorkerTempDir, 0o755)
##########################################
#Setup the logging
##########################################
#This is mildly tricky because we don't just want to
#redirect stdout and stderr for this Python process; we want to redirect it
#for this process and all children. Consequently, we can't just replace
#sys.stdout and sys.stderr; we need to mess with the underlying OS-level
#file descriptors. See <http://stackoverflow.com/a/11632982/402891>
#When we start, standard input is file descriptor 0, standard output is
#file descriptor 1, and standard error is file descriptor 2.
#What file do we want to point FDs 1 and 2 to?
tempWorkerLogPath = os.path.join(localWorkerTempDir, "worker_log.txt")
if redirectOutputToLogFile:
# Save the original stdout and stderr (by opening new file descriptors
# to the same files)
origStdOut = os.dup(1)
origStdErr = os.dup(2)
# Open the file to send stdout/stderr to.
logFh = os.open(tempWorkerLogPath,
os.O_WRONLY | os.O_CREAT | os.O_APPEND)
# Replace standard output with a descriptor for the log file
os.dup2(logFh, 1)
# Replace standard error with a descriptor for the log file
os.dup2(logFh, 2)
# Since we only opened the file once, all the descriptors duped from
# the original will share offset information, and won't clobber each
# others' writes. See <http://stackoverflow.com/a/5284108/402891>. This
# shouldn't matter, since O_APPEND seeks to the end of the file before
# every write, but maybe there's something odd going on...
# Close the descriptor we used to open the file
os.close(logFh)
debugging = logging.getLogger().isEnabledFor(logging.DEBUG)
##########################################
#Worker log file trapped from here on in
##########################################
workerFailed = False
statsDict = MagicExpando()
statsDict.jobs = []
statsDict.workers.logsToMaster = []
blockFn = lambda: True
listOfJobs = [jobName]
try:
#Put a message at the top of the log, just to make sure it's working.
logger.info("---TOIL WORKER OUTPUT LOG---")
sys.stdout.flush()
logProcessContext(config)
##########################################
#Load the jobGraph
##########################################
jobGraph = jobStore.load(jobStoreID)
listOfJobs[0] = str(jobGraph)
logger.debug("Parsed job wrapper")
##########################################
#Cleanup from any earlier invocation of the jobGraph
##########################################
if jobGraph.command == None:
logger.debug("Wrapper has no user job to run.")
# Cleanup jobs already finished
f = lambda jobs: [
z for z in [[y for y in x if jobStore.exists(y.jobStoreID)]
for x in jobs] if len(z) > 0
]
jobGraph.stack = f(jobGraph.stack)
jobGraph.services = f(jobGraph.services)
logger.debug(
"Cleaned up any references to completed successor jobs")
#This cleans the old log file which may
#have been left if the job is being retried after a job failure.
oldLogFile = jobGraph.logJobStoreFileID
if oldLogFile != None:
jobGraph.logJobStoreFileID = None
jobStore.update(jobGraph) #Update first, before deleting any files
jobStore.deleteFile(oldLogFile)
##########################################
# If a checkpoint exists, restart from the checkpoint
##########################################
# The job is a checkpoint, and is being restarted after previously completing
if jobGraph.checkpoint != None:
logger.debug("Job is a checkpoint")
# If the checkpoint still has extant jobs in its
# (flattened) stack and services, its subtree didn't
# complete properly. We handle the restart of the
# checkpoint here, removing its previous subtree.
if len([i for l in jobGraph.stack
for i in l]) > 0 or len(jobGraph.services) > 0:
logger.debug("Checkpoint has failed.")
# Reduce the retry count
assert jobGraph.remainingRetryCount >= 0
jobGraph.remainingRetryCount = max(
0, jobGraph.remainingRetryCount - 1)
jobGraph.restartCheckpoint(jobStore)
# Otherwise, the job and successors are done, and we can cleanup stuff we couldn't clean
# because of the job being a checkpoint
else:
logger.debug(
"The checkpoint jobs seems to have completed okay, removing any checkpoint files to delete."
)
#Delete any remnant files
list(
map(
jobStore.deleteFile,
list(
filter(jobStore.fileExists,
jobGraph.checkpointFilesToDelete))))
##########################################
#Setup the stats, if requested
##########################################
if config.stats:
startClock = getTotalCpuTime()
startTime = time.time()
while True:
##########################################
#Run the jobGraph, if there is one
##########################################
if jobGraph.command is not None:
assert jobGraph.command.startswith("_toil ")
logger.debug("Got a command to run: %s" % jobGraph.command)
#Load the job
job = Job._loadJob(jobGraph.command, jobStore)
# If it is a checkpoint job, save the command
if job.checkpoint:
jobGraph.checkpoint = jobGraph.command
# Create a fileStore object for the job
fileStore = FileStore.createFileStore(
jobStore,
jobGraph,
localWorkerTempDir,
blockFn,
caching=not config.disableCaching)
with job._executor(jobGraph=jobGraph,
stats=statsDict if config.stats else None,
fileStore=fileStore):
with fileStore.open(job):
# Get the next block function and list that will contain any messages
blockFn = fileStore._blockFn
job._runner(jobGraph=jobGraph,
jobStore=jobStore,
fileStore=fileStore)
# Accumulate messages from this job & any subsequent chained jobs
statsDict.workers.logsToMaster += fileStore.loggingMessages
else:
#The command may be none, in which case
#the jobGraph is either a shell ready to be deleted or has
#been scheduled after a failure to cleanup
logger.debug("No user job to run, so finishing")
break
if FileStore._terminateEvent.isSet():
raise RuntimeError("The termination flag is set")
##########################################
#Establish if we can run another jobGraph within the worker
##########################################
successorJobGraph = nextChainableJobGraph(jobGraph, jobStore)
if successorJobGraph is None or config.disableChaining:
# Can't chain any more jobs.
break
##########################################
#We have a single successor job that is not a checkpoint job.
#We transplant the successor jobGraph command and stack
#into the current jobGraph object so that it can be run
#as if it were a command that were part of the current jobGraph.
#We can then delete the successor jobGraph in the jobStore, as it is
#wholly incorporated into the current jobGraph.
##########################################
# add the successor to the list of jobs run
listOfJobs.append(str(successorJobGraph))
#Clone the jobGraph and its stack
jobGraph = copy.deepcopy(jobGraph)
#Remove the successor jobGraph
jobGraph.stack.pop()
#Transplant the command and stack to the current jobGraph
jobGraph.command = successorJobGraph.command
jobGraph.stack += successorJobGraph.stack
# include some attributes for better identification of chained jobs in
# logging output
jobGraph.unitName = successorJobGraph.unitName
jobGraph.jobName = successorJobGraph.jobName
assert jobGraph.memory >= successorJobGraph.memory
assert jobGraph.cores >= successorJobGraph.cores
#Build a fileStore to update the job
fileStore = FileStore.createFileStore(
jobStore,
jobGraph,
localWorkerTempDir,
blockFn,
caching=not config.disableCaching)
#Update blockFn
blockFn = fileStore._blockFn
#Add successorJobGraph to those to be deleted
fileStore.jobsToDelete.add(successorJobGraph.jobStoreID)
#This will update the job once the previous job is done
fileStore._updateJobWhenDone()
#Clone the jobGraph and its stack again, so that updates to it do
#not interfere with this update
jobGraph = copy.deepcopy(jobGraph)
logger.debug("Starting the next job")
##########################################
#Finish up the stats
##########################################
if config.stats:
totalCPUTime, totalMemoryUsage = getTotalCpuTimeAndMemoryUsage()
statsDict.workers.time = str(time.time() - startTime)
statsDict.workers.clock = str(totalCPUTime - startClock)
statsDict.workers.memory = str(totalMemoryUsage)
# log the worker log path here so that if the file is truncated the path can still be found
if redirectOutputToLogFile:
logger.info(
"Worker log can be found at %s. Set --cleanWorkDir to retain this log",
localWorkerTempDir)
logger.info(
"Finished running the chain of jobs on this node, we ran for a total of %f seconds",
time.time() - startTime)
##########################################
#Trapping where worker goes wrong
##########################################
except: #Case that something goes wrong in worker
traceback.print_exc()
logger.error("Exiting the worker because of a failed job on host %s",
socket.gethostname())
FileStore._terminateEvent.set()
##########################################
#Wait for the asynchronous chain of writes/updates to finish
##########################################
blockFn()
##########################################
#All the asynchronous worker/update threads must be finished now,
#so safe to test if they completed okay
##########################################
if FileStore._terminateEvent.isSet():
jobGraph = jobStore.load(jobStoreID)
jobGraph.setupJobAfterFailure(config)
workerFailed = True
##########################################
#Cleanup
##########################################
# Close the worker logging
# Flush at the Python level
sys.stdout.flush()
sys.stderr.flush()
if redirectOutputToLogFile:
# Flush at the OS level
os.fsync(1)
os.fsync(2)
# Close redirected stdout and replace with the original standard output.
os.dup2(origStdOut, 1)
# Close redirected stderr and replace with the original standard error.
os.dup2(origStdErr, 2)
# sys.stdout and sys.stderr don't need to be modified at all. We don't
# need to call redirectLoggerStreamHandlers since they still log to
# sys.stderr
# Close our extra handles to the original standard output and standard
# error streams, so we don't leak file handles.
os.close(origStdOut)
os.close(origStdErr)
# Now our file handles are in exactly the state they were in before.
#Copy back the log file to the global dir, if needed
if workerFailed:
jobGraph.logJobStoreFileID = jobStore.getEmptyFileStoreID(
jobGraph.jobStoreID)
jobGraph.chainedJobs = listOfJobs
with jobStore.updateFileStream(jobGraph.logJobStoreFileID) as w:
with open(tempWorkerLogPath, "r") as f:
if os.path.getsize(
tempWorkerLogPath) > logFileByteReportLimit != 0:
if logFileByteReportLimit > 0:
f.seek(-logFileByteReportLimit,
2) # seek to last tooBig bytes of file
elif logFileByteReportLimit < 0:
f.seek(logFileByteReportLimit,
0) # seek to first tooBig bytes of file
w.write(f.read())
jobStore.update(jobGraph)
elif debugging and redirectOutputToLogFile: # write log messages
with open(tempWorkerLogPath, 'r') as logFile:
if os.path.getsize(
tempWorkerLogPath) > logFileByteReportLimit != 0:
if logFileByteReportLimit > 0:
logFile.seek(-logFileByteReportLimit,
2) # seek to last tooBig bytes of file
elif logFileByteReportLimit < 0:
logFile.seek(logFileByteReportLimit,
0) # seek to first tooBig bytes of file
logMessages = logFile.read().splitlines()
statsDict.logs.names = listOfJobs
statsDict.logs.messages = logMessages
if (debugging or config.stats or statsDict.workers.logsToMaster
) and not workerFailed: # We have stats/logging to report back
jobStore.writeStatsAndLogging(json.dumps(statsDict))
#Remove the temp dir
cleanUp = config.cleanWorkDir
if cleanUp == 'always' or (cleanUp == 'onSuccess'
and not workerFailed) or (cleanUp == 'onError'
and workerFailed):
shutil.rmtree(localWorkerTempDir)
#This must happen after the log file is done with, else there is no place to put the log
if (not workerFailed) and jobGraph.command == None and len(
jobGraph.stack) == 0 and len(jobGraph.services) == 0:
# We can now safely get rid of the jobGraph
jobStore.delete(jobGraph.jobStoreID)
def main():
logging.basicConfig()
##########################################
#Import necessary modules
##########################################
# This is assuming that worker.py is at a path ending in "/toil/worker.py".
sourcePath = os.path.dirname(os.path.dirname(__file__))
if sourcePath not in sys.path:
sys.path.append(sourcePath)
#Now we can import all the necessary functions
from toil.lib.bioio import setLogLevel
from toil.lib.bioio import getTotalCpuTime
from toil.lib.bioio import getTotalCpuTimeAndMemoryUsage
from toil.lib.bioio import makePublicDir
from toil.lib.bioio import system
from toil.job import Job
##########################################
#Input args
##########################################
jobStoreString = sys.argv[1]
jobStoreID = sys.argv[2]
##########################################
#Load the jobStore/config file
##########################################
jobStore = Toil.loadOrCreateJobStore(jobStoreString)
config = jobStore.config
##########################################
#Create the worker killer, if requested
##########################################
if config.badWorker > 0 and random.random() < config.badWorker:
def badWorker():
#This will randomly kill the worker process at a random time
time.sleep(config.badWorkerFailInterval * random.random())
os.kill(os.getpid(), signal.SIGKILL) #signal.SIGINT)
#TODO: FIX OCCASIONAL DEADLOCK WITH SIGINT (tested on single machine)
t = Thread(target=badWorker)
# Ideally this would be a daemon thread but that causes an intermittent (but benign)
# exception similar to the one described here:
# http://stackoverflow.com/questions/20596918/python-exception-in-thread-thread-1-most-likely-raised-during-interpreter-shutd
# Our exception is:
# Exception in thread Thread-1 (most likely raised during interpreter shutdown):
# <type 'exceptions.AttributeError'>: 'NoneType' object has no attribute 'kill'
# This attribute error is caused by the call os.kill() and apparently unavoidable with a
# daemon
t.start()
##########################################
#Load the environment for the jobWrapper
##########################################
#First load the environment for the jobWrapper.
with jobStore.readSharedFileStream("environment.pickle") as fileHandle:
environment = cPickle.load(fileHandle)
for i in environment:
if i not in ("TMPDIR", "TMP", "HOSTNAME", "HOSTTYPE"):
os.environ[i] = environment[i]
# sys.path is used by __import__ to find modules
if "PYTHONPATH" in environment:
for e in environment["PYTHONPATH"].split(':'):
if e != '':
sys.path.append(e)
setLogLevel(config.logLevel)
toilWorkflowDir = Toil.getWorkflowDir(config.workflowID, config.workDir)
##########################################
#Setup the temporary directories.
##########################################
# Dir to put all this worker's temp files in.
localWorkerTempDir = tempfile.mkdtemp(dir=toilWorkflowDir)
os.chmod(localWorkerTempDir, 0755)
##########################################
#Setup the logging
##########################################
#This is mildly tricky because we don't just want to
#redirect stdout and stderr for this Python process; we want to redirect it
#for this process and all children. Consequently, we can't just replace
#sys.stdout and sys.stderr; we need to mess with the underlying OS-level
#file descriptors. See <http://stackoverflow.com/a/11632982/402891>
#When we start, standard input is file descriptor 0, standard output is
#file descriptor 1, and standard error is file descriptor 2.
#What file do we want to point FDs 1 and 2 to?
tempWorkerLogPath = os.path.join(localWorkerTempDir, "worker_log.txt")
#Save the original stdout and stderr (by opening new file descriptors to the
#same files)
origStdOut = os.dup(1)
origStdErr = os.dup(2)
#Open the file to send stdout/stderr to.
logFh = os.open(tempWorkerLogPath, os.O_WRONLY | os.O_CREAT | os.O_APPEND)
#Replace standard output with a descriptor for the log file
os.dup2(logFh, 1)
#Replace standard error with a descriptor for the log file
os.dup2(logFh, 2)
#Since we only opened the file once, all the descriptors duped from the
#original will share offset information, and won't clobber each others'
#writes. See <http://stackoverflow.com/a/5284108/402891>. This shouldn't
#matter, since O_APPEND seeks to the end of the file before every write, but
#maybe there's something odd going on...
#Close the descriptor we used to open the file
os.close(logFh)
for handler in list(logger.handlers): #Remove old handlers
logger.removeHandler(handler)
#Add the new handler. The sys.stderr stream has been redirected by swapping
#the file descriptor out from under it.
logger.addHandler(logging.StreamHandler(sys.stderr))
debugging = logging.getLogger().isEnabledFor(logging.DEBUG)
##########################################
#Worker log file trapped from here on in
##########################################
workerFailed = False
statsDict = MagicExpando()
statsDict.jobs = []
statsDict.workers.logsToMaster = []
blockFn = lambda : True
cleanCacheFn = lambda x : True
try:
#Put a message at the top of the log, just to make sure it's working.
print "---TOIL WORKER OUTPUT LOG---"
sys.stdout.flush()
#Log the number of open file descriptors so we can tell if we're leaking
#them.
logger.debug("Next available file descriptor: {}".format(
nextOpenDescriptor()))
# Setup the caching variable now in case of an exception during loading of jobwrapper, etc
# Flag to identify if the run is cached or not.
FileStore = Job.FileStore if config.disableSharedCache else Job.CachedFileStore
##########################################
#Load the jobWrapper
##########################################
jobWrapper = jobStore.load(jobStoreID)
logger.debug("Parsed jobWrapper")
##########################################
#Cleanup from any earlier invocation of the jobWrapper
##########################################
if jobWrapper.command == None:
# Cleanup jobs already finished
f = lambda jobs : filter(lambda x : len(x) > 0, map(lambda x :
filter(lambda y : jobStore.exists(y[0]), x), jobs))
jobWrapper.stack = f(jobWrapper.stack)
jobWrapper.services = f(jobWrapper.services)
logger.debug("Cleaned up any references to completed successor jobs")
#This cleans the old log file which may
#have been left if the jobWrapper is being retried after a jobWrapper failure.
oldLogFile = jobWrapper.logJobStoreFileID
if oldLogFile != None:
jobWrapper.logJobStoreFileID = None
jobStore.update(jobWrapper) #Update first, before deleting any files
jobStore.deleteFile(oldLogFile)
##########################################
# If a checkpoint exists, restart from the checkpoint
##########################################
# The job is a checkpoint, and is being restarted after previously completing
if jobWrapper.checkpoint != None:
logger.debug("Job is a checkpoint")
if len(jobWrapper.stack) > 0 or len(jobWrapper.services) > 0 or jobWrapper.command != None:
if jobWrapper.command != None:
assert jobWrapper.command == jobWrapper.checkpoint
logger.debug("Checkpoint job already has command set to run")
else:
jobWrapper.command = jobWrapper.checkpoint
# Reduce the retry count
assert jobWrapper.remainingRetryCount >= 0
jobWrapper.remainingRetryCount = max(0, jobWrapper.remainingRetryCount - 1)
jobStore.update(jobWrapper) # Update immediately to ensure that checkpoint
# is made before deleting any remaining successors
if len(jobWrapper.stack) > 0 or len(jobWrapper.services) > 0:
# If the subtree of successors is not complete restart everything
logger.debug("Checkpoint job has unfinished successor jobs, deleting the jobs on the stack: %s, services: %s " %
(jobWrapper.stack, jobWrapper.services))
# Delete everything on the stack, as these represent successors to clean
# up as we restart the queue
def recursiveDelete(jobWrapper2):
# Recursive walk the stack to delete all remaining jobs
for jobs in jobWrapper2.stack + jobWrapper2.services:
for jobTuple in jobs:
if jobStore.exists(jobTuple[0]):
recursiveDelete(jobStore.load(jobTuple[0]))
else:
logger.debug("Job %s has already been deleted", jobTuple[0])
if jobWrapper2 != jobWrapper:
logger.debug("Checkpoint is deleting old successor job: %s", jobWrapper2.jobStoreID)
jobStore.delete(jobWrapper2.jobStoreID)
recursiveDelete(jobWrapper)
jobWrapper.stack = [ [], [] ] # Initialise the job to mimic the state of a job
# that has been previously serialised but which as yet has no successors
jobWrapper.services = [] # Empty the services
# Update the jobStore to avoid doing this twice on failure and make this clean.
jobStore.update(jobWrapper)
# Otherwise, the job and successors are done, and we can cleanup stuff we couldn't clean
# because of the job being a checkpoint
else:
logger.debug("The checkpoint jobs seems to have completed okay, removing any checkpoint files to delete.")
#Delete any remnant files
map(jobStore.deleteFile, filter(jobStore.fileExists, jobWrapper.checkpointFilesToDelete))
##########################################
#Setup the stats, if requested
##########################################
if config.stats:
startTime = time.time()
startClock = getTotalCpuTime()
#Make a temporary file directory for the jobWrapper
#localTempDir = makePublicDir(os.path.join(localWorkerTempDir, "localTempDir"))
startTime = time.time()
while True:
##########################################
#Run the jobWrapper, if there is one
##########################################
if jobWrapper.command is not None:
assert jobWrapper.command.startswith( "_toil " )
logger.debug("Got a command to run: %s" % jobWrapper.command)
#Load the job
job = Job._loadJob(jobWrapper.command, jobStore)
# If it is a checkpoint job, save the command
if job.checkpoint:
jobWrapper.checkpoint = jobWrapper.command
# Need to fix all this for non shared cache runs
if config.disableSharedCache:
#Cleanup the cache from the previous job
cleanCacheFn(job.effectiveRequirements(jobStore.config).cache)
# Create a fileStore object for the job
fileStore = FileStore(jobStore, jobWrapper, localWorkerTempDir, blockFn)
with job._executor(jobWrapper=jobWrapper,
stats=statsDict if config.stats else None,
fileStore=fileStore):
with fileStore.open(job):
# Get the next block function and list that will contain any messages
blockFn = fileStore._blockFn
job._runner(jobWrapper=jobWrapper, jobStore=jobStore, fileStore=fileStore)
# Accumulate messages from this job & any subsequent chained jobs
statsDict.workers.logsToMaster += fileStore.loggingMessages
if config.disableSharedCache:
#Set the clean cache function
cleanCacheFn = fileStore._cleanLocalTempDir
else:
#The command may be none, in which case
#the jobWrapper is either a shell ready to be deleted or has
#been scheduled after a failure to cleanup
break
if FileStore._terminateEvent.isSet():
raise RuntimeError("The termination flag is set")
##########################################
#Establish if we can run another jobWrapper within the worker
##########################################
#If no more jobs to run or services not finished, quit
if len(jobWrapper.stack) == 0 or len(jobWrapper.services) > 0 or jobWrapper.checkpoint != None:
logger.debug("Stopping running chain of jobs: length of stack: %s, services: %s, checkpoint: %s",
len(jobWrapper.stack), len(jobWrapper.services), jobWrapper.checkpoint != None)
break
#Get the next set of jobs to run
jobs = jobWrapper.stack[-1]
assert len(jobs) > 0
#If there are 2 or more jobs to run in parallel we quit
if len(jobs) >= 2:
logger.debug("No more jobs can run in series by this worker,"
" it's got %i children", len(jobs)-1)
break
#We check the requirements of the jobWrapper to see if we can run it
#within the current worker
successorJobStoreID, successorMemory, successorCores, successorsDisk, successorsPreemptable, successorPredecessorID = jobs[0]
if successorMemory > jobWrapper.memory:
logger.debug("We need more memory for the next jobWrapper, so finishing")
break
if successorCores > jobWrapper.cores:
logger.debug("We need more cores for the next jobWrapper, so finishing")
break
if successorsDisk > jobWrapper.disk:
logger.debug("We need more disk for the next jobWrapper, so finishing")
break
if successorPredecessorID != None:
logger.debug("The jobWrapper has multiple predecessors, we must return to the leader.")
break
# Load the successor jobWrapper
successorJobWrapper = jobStore.load(successorJobStoreID)
# Somewhat ugly, but check if job is a checkpoint job and quit if
# so
if successorJobWrapper.command.startswith( "_toil " ):
#Load the job
successorJob = Job._loadJob(successorJobWrapper.command, jobStore)
# Check it is not a checkpoint
if successorJob.checkpoint:
logger.debug("Next job is checkpoint, so finishing")
break
##########################################
#We have a single successor job that is not a checkpoint job.
#We transplant the successor jobWrappers command and stack
#into the current jobWrapper so that it can be run
#as if it were a command that were part of the current jobWrapper.
#We can then delete the successor jobWrapper in the jobStore, as it is
#wholly incorporated into the current jobWrapper.
##########################################
#Clone the jobWrapper and its stack
jobWrapper = copy.deepcopy(jobWrapper)
#Remove the successor jobWrapper
jobWrapper.stack.pop()
#These should all match up
assert successorJobWrapper.memory == successorMemory
assert successorJobWrapper.cores == successorCores
assert successorJobWrapper.predecessorsFinished == set()
assert successorJobWrapper.predecessorNumber == 1
assert successorJobWrapper.command != None
assert successorJobStoreID == successorJobWrapper.jobStoreID
#Transplant the command and stack to the current jobWrapper
jobWrapper.command = successorJobWrapper.command
jobWrapper.stack += successorJobWrapper.stack
assert jobWrapper.memory >= successorJobWrapper.memory
assert jobWrapper.cores >= successorJobWrapper.cores
#Build a fileStore to update the job
fileStore = Job.FileStore(jobStore, jobWrapper, localWorkerTempDir, blockFn)
#Update blockFn
blockFn = fileStore._blockFn
#Add successorJobWrapper to those to be deleted
fileStore.jobsToDelete.add(successorJobWrapper.jobStoreID)
#This will update the job once the previous job is done
fileStore._updateJobWhenDone()
#Clone the jobWrapper and its stack again, so that updates to it do
#not interfere with this update
jobWrapper = copy.deepcopy(jobWrapper)
logger.debug("Starting the next jobWrapper")
##########################################
#Finish up the stats
##########################################
if config.stats:
totalCPUTime, totalMemoryUsage = getTotalCpuTimeAndMemoryUsage()
statsDict.workers.time = str(time.time() - startTime)
statsDict.workers.clock = str(totalCPUTime - startClock)
statsDict.workers.memory = str(totalMemoryUsage)
# log the worker log path here so that if the file is truncated the path can still be found
logger.info("Worker log can be found at %s. Set --cleanWorkDir to retain this log", localWorkerTempDir)
logger.info("Finished running the chain of jobs on this node, we ran for a total of %f seconds", time.time() - startTime)
##########################################
#Trapping where worker goes wrong
##########################################
except: #Case that something goes wrong in worker
traceback.print_exc()
logger.error("Exiting the worker because of a failed jobWrapper on host %s", socket.gethostname())
FileStore._terminateEvent.set()
##########################################
#Wait for the asynchronous chain of writes/updates to finish
##########################################
blockFn()
##########################################
#All the asynchronous worker/update threads must be finished now,
#so safe to test if they completed okay
##########################################
if FileStore._terminateEvent.isSet():
jobWrapper = jobStore.load(jobStoreID)
jobWrapper.setupJobAfterFailure(config)
workerFailed = True
##########################################
#Cleanup
##########################################
#Close the worker logging
#Flush at the Python level
sys.stdout.flush()
sys.stderr.flush()
#Flush at the OS level
os.fsync(1)
os.fsync(2)
#Close redirected stdout and replace with the original standard output.
os.dup2(origStdOut, 1)
#Close redirected stderr and replace with the original standard error.
os.dup2(origStdOut, 2)
#sys.stdout and sys.stderr don't need to be modified at all. We don't need
#to call redirectLoggerStreamHandlers since they still log to sys.stderr
#Close our extra handles to the original standard output and standard error
#streams, so we don't leak file handles.
os.close(origStdOut)
os.close(origStdErr)
#Now our file handles are in exactly the state they were in before.
#Copy back the log file to the global dir, if needed
if workerFailed:
jobWrapper.logJobStoreFileID = jobStore.getEmptyFileStoreID(jobWrapper.jobStoreID)
with jobStore.updateFileStream(jobWrapper.logJobStoreFileID) as w:
with open(tempWorkerLogPath, "r") as f:
if os.path.getsize(tempWorkerLogPath) > logFileByteReportLimit:
f.seek(-logFileByteReportLimit, 2) # seek to last tooBig bytes of file
w.write(f.read())
jobStore.update(jobWrapper)
elif debugging: # write log messages
with open(tempWorkerLogPath, 'r') as logFile:
if os.path.getsize(tempWorkerLogPath) > logFileByteReportLimit:
logFile.seek(-logFileByteReportLimit, 2) # seek to last tooBig bytes of file
logMessages = logFile.read().splitlines()
statsDict.logs = [Expando(jobStoreID=jobStoreID, text=logMessage) for logMessage in logMessages]
if (debugging or config.stats or statsDict.workers.logsToMaster) and not workerFailed: # We have stats/logging to report back
jobStore.writeStatsAndLogging(json.dumps(statsDict))
#Remove the temp dir
cleanUp = config.cleanWorkDir
if cleanUp == 'always' or (cleanUp == 'onSuccess' and not workerFailed) or (cleanUp == 'onError' and workerFailed):
shutil.rmtree(localWorkerTempDir)
#This must happen after the log file is done with, else there is no place to put the log
if (not workerFailed) and jobWrapper.command == None and len(jobWrapper.stack) == 0 and len(jobWrapper.services) == 0:
# We can now safely get rid of the jobWrapper
jobStore.delete(jobWrapper.jobStoreID)
def main():
logging.basicConfig()
##########################################
#Import necessary modules
##########################################
# This is assuming that worker.py is at a path ending in "/toil/worker.py".
sourcePath = os.path.dirname(os.path.dirname(__file__))
if sourcePath not in sys.path:
sys.path.append(sourcePath)
#Now we can import all the necessary functions
from toil.lib.bioio import setLogLevel
from toil.lib.bioio import getTotalCpuTime
from toil.lib.bioio import getTotalCpuTimeAndMemoryUsage
from toil.lib.bioio import makePublicDir
from toil.lib.bioio import system
from toil.common import loadJobStore
from toil.job import Job
##########################################
#Input args
##########################################
jobStoreString = sys.argv[1]
jobStoreID = sys.argv[2]
##########################################
#Load the jobStore/config file
##########################################
jobStore = loadJobStore(jobStoreString)
config = jobStore.config
##########################################
#Create the worker killer, if requested
##########################################
if config.badWorker > 0 and random.random() < config.badWorker:
def badWorker():
#This will randomly kill the worker process at a random time
time.sleep(config.badWorkerFailInterval * random.random())
os.kill(os.getpid(), signal.SIGKILL) #signal.SIGINT)
#TODO: FIX OCCASIONAL DEADLOCK WITH SIGINT (tested on single machine)
t = Thread(target=badWorker)
t.daemon = True
t.start()
##########################################
#Load the environment for the jobWrapper
##########################################
#First load the environment for the jobWrapper.
with jobStore.readSharedFileStream("environment.pickle") as fileHandle:
environment = cPickle.load(fileHandle)
for i in environment:
if i not in ("TMPDIR", "TMP", "HOSTNAME", "HOSTTYPE"):
os.environ[i] = environment[i]
# sys.path is used by __import__ to find modules
if "PYTHONPATH" in environment:
for e in environment["PYTHONPATH"].split(':'):
if e != '':
sys.path.append(e)
setLogLevel(config.logLevel)
tempRootDir = config.workDir
if tempRootDir is not None and not os.path.exists(tempRootDir):
raise RuntimeError("The temporary directory specified by workDir: %s does not exist" % tempRootDir)
##########################################
#Setup the temporary directories.
##########################################
#Dir to put all the temp files in. If tempRootDir is None, tempdir looks at environment variables to determine
# where to put the tempDir.
localWorkerTempDir = tempfile.mkdtemp(dir=tempRootDir)
os.chmod(localWorkerTempDir, 0755)
##########################################
#Setup the logging
##########################################
#This is mildly tricky because we don't just want to
#redirect stdout and stderr for this Python process; we want to redirect it
#for this process and all children. Consequently, we can't just replace
#sys.stdout and sys.stderr; we need to mess with the underlying OS-level
#file descriptors. See <http://stackoverflow.com/a/11632982/402891>
#When we start, standard input is file descriptor 0, standard output is
#file descriptor 1, and standard error is file descriptor 2.
#What file do we want to point FDs 1 and 2 to?
tempWorkerLogPath = os.path.join(localWorkerTempDir, "worker_log.txt")
#Save the original stdout and stderr (by opening new file descriptors to the
#same files)
origStdOut = os.dup(1)
origStdErr = os.dup(2)
#Open the file to send stdout/stderr to.
logFh = os.open(tempWorkerLogPath, os.O_WRONLY | os.O_CREAT | os.O_APPEND)
#Replace standard output with a descriptor for the log file
os.dup2(logFh, 1)
#Replace standard error with a descriptor for the log file
os.dup2(logFh, 2)
#Since we only opened the file once, all the descriptors duped from the
#original will share offset information, and won't clobber each others'
#writes. See <http://stackoverflow.com/a/5284108/402891>. This shouldn't
#matter, since O_APPEND seeks to the end of the file before every write, but
#maybe there's something odd going on...
#Close the descriptor we used to open the file
os.close(logFh)
for handler in list(logger.handlers): #Remove old handlers
logger.removeHandler(handler)
#Add the new handler. The sys.stderr stream has been redirected by swapping
#the file descriptor out from under it.
logger.addHandler(logging.StreamHandler(sys.stderr))
debugging = logging.getLogger().isEnabledFor(logging.DEBUG)
##########################################
#Worker log file trapped from here on in
##########################################
workerFailed = False
statsDict = MagicExpando()
statsDict.jobs = []
messages = []
blockFn = lambda : True
cleanCacheFn = lambda x : True
try:
#Put a message at the top of the log, just to make sure it's working.
print "---TOIL WORKER OUTPUT LOG---"
sys.stdout.flush()
#Log the number of open file descriptors so we can tell if we're leaking
#them.
logger.debug("Next available file descriptor: {}".format(
nextOpenDescriptor()))
##########################################
#Load the jobWrapper
##########################################
jobWrapper = jobStore.load(jobStoreID)
logger.debug("Parsed jobWrapper")
##########################################
#Cleanup from any earlier invocation of the jobWrapper
##########################################
if jobWrapper.command == None:
while len(jobWrapper.stack) > 0:
jobs = jobWrapper.stack[-1]
#If the jobs still exist they have not been run, so break
if jobStore.exists(jobs[0][0]):
break
#However, if they are gone then we can remove them from the stack.
#This is the only way to flush successors that have previously been run
#, as jobs are, as far as possible, read only in the leader.
jobWrapper.stack.pop()
#This cleans the old log file which may
#have been left if the jobWrapper is being retried after a jobWrapper failure.
oldLogFile = jobWrapper.logJobStoreFileID
jobWrapper.logJobStoreFileID = None
jobStore.update(jobWrapper) #Update first, before deleting the file
if oldLogFile != None:
jobStore.delete(oldLogFile)
#Make a temporary file directory for the jobWrapper
localTempDir = makePublicDir(os.path.join(localWorkerTempDir, "localTempDir"))
##########################################
#Setup the stats, if requested
##########################################
if config.stats:
startTime = time.time()
startClock = getTotalCpuTime()
startTime = time.time()
while True:
##########################################
#Run the jobWrapper, if there is one
##########################################
if jobWrapper.command != None:
if jobWrapper.command.startswith( "_toil " ):
#Load the job
job = Job._loadJob(jobWrapper.command, jobStore)
#Cleanup the cache from the previous job
cleanCacheFn(job.effectiveRequirements(jobStore.config).cache)
#Create a fileStore object for the job
fileStore = Job.FileStore(jobStore, jobWrapper, localTempDir,
blockFn)
#Get the next block function and list that will contain any messages
blockFn = fileStore._blockFn
messages = fileStore.loggingMessages
job._execute(jobWrapper=jobWrapper,
stats=statsDict if config.stats else None,
localTempDir=localTempDir,
jobStore=jobStore,
fileStore=fileStore)
#Set the clean cache function
cleanCacheFn = fileStore._cleanLocalTempDir
else: #Is another command (running outside of jobs may be deprecated)
#Cleanup the cache from the previous job
cleanCacheFn(0)
system(jobWrapper.command)
#Set a dummy clean cache fn
cleanCacheFn = lambda x : None
else:
#The command may be none, in which case
#the jobWrapper is either a shell ready to be deleted or has
#been scheduled after a failure to cleanup
break
if Job.FileStore._terminateEvent.isSet():
raise RuntimeError("The termination flag is set")
##########################################
#Establish if we can run another jobWrapper within the worker
##########################################
#No more jobs to run so quit
if len(jobWrapper.stack) == 0:
break
#Get the next set of jobs to run
jobs = jobWrapper.stack[-1]
assert len(jobs) > 0
#If there are 2 or more jobs to run in parallel we quit
if len(jobs) >= 2:
logger.debug("No more jobs can run in series by this worker,"
" it's got %i children", len(jobs)-1)
break
#We check the requirements of the jobWrapper to see if we can run it
#within the current worker
successorJobStoreID, successorMemory, successorCores, successorsDisk, successorPredecessorID = jobs[0]
if successorMemory > jobWrapper.memory:
logger.debug("We need more memory for the next jobWrapper, so finishing")
break
if successorCores > jobWrapper.cores:
logger.debug("We need more cores for the next jobWrapper, so finishing")
break
if successorsDisk > jobWrapper.disk:
logger.debug("We need more disk for the next jobWrapper, so finishing")
break
if successorPredecessorID != None:
logger.debug("The jobWrapper has multiple predecessors, we must return to the leader.")
break
##########################################
#We have a single successor jobWrapper.
#We load the successor jobWrapper and transplant its command and stack
#into the current jobWrapper so that it can be run
#as if it were a command that were part of the current jobWrapper.
#We can then delete the successor jobWrapper in the jobStore, as it is
#wholly incorporated into the current jobWrapper.
##########################################
#Clone the jobWrapper and its stack
jobWrapper = copy.deepcopy(jobWrapper)
#Remove the successor jobWrapper
jobWrapper.stack.pop()
#Load the successor jobWrapper
successorJob = jobStore.load(successorJobStoreID)
#These should all match up
assert successorJob.memory == successorMemory
assert successorJob.cores == successorCores
assert successorJob.predecessorsFinished == set()
assert successorJob.predecessorNumber == 1
assert successorJob.command != None
assert successorJobStoreID == successorJob.jobStoreID
#Transplant the command and stack to the current jobWrapper
jobWrapper.command = successorJob.command
jobWrapper.stack += successorJob.stack
assert jobWrapper.memory >= successorJob.memory
assert jobWrapper.cores >= successorJob.cores
#Build a fileStore to update the job
fileStore = Job.FileStore(jobStore, jobWrapper, localTempDir, blockFn)
#Update blockFn
blockFn = fileStore._blockFn
#Add successorJob to those to be deleted
fileStore.jobsToDelete.add(successorJob.jobStoreID)
#This will update the job once the previous job is done
fileStore._updateJobWhenDone()
#Clone the jobWrapper and its stack again, so that updates to it do
#not interfere with this update
jobWrapper = copy.deepcopy(jobWrapper)
logger.debug("Starting the next jobWrapper")
##########################################
#Finish up the stats
##########################################
if config.stats:
totalCPUTime, totalMemoryUsage = getTotalCpuTimeAndMemoryUsage()
statsDict.workers.time = str(time.time() - startTime)
statsDict.workers.clock = str(totalCPUTime - startClock)
statsDict.workers.memory = str(totalMemoryUsage)
statsDict.workers.log = messages
logger.info("Finished running the chain of jobs on this node, we ran for a total of %f seconds", time.time() - startTime)
##########################################
#Trapping where worker goes wrong
##########################################
except: #Case that something goes wrong in worker
traceback.print_exc()
logger.error("Exiting the worker because of a failed jobWrapper on host %s", socket.gethostname())
Job.FileStore._terminateEvent.set()
##########################################
#Wait for the asynchronous chain of writes/updates to finish
##########################################
blockFn()
##########################################
#All the asynchronous worker/update threads must be finished now,
#so safe to test if they completed okay
##########################################
if Job.FileStore._terminateEvent.isSet():
jobWrapper = jobStore.load(jobStoreID)
jobWrapper.setupJobAfterFailure(config)
workerFailed = True
##########################################
#Cleanup
##########################################
#Close the worker logging
#Flush at the Python level
sys.stdout.flush()
sys.stderr.flush()
#Flush at the OS level
os.fsync(1)
os.fsync(2)
#Close redirected stdout and replace with the original standard output.
os.dup2(origStdOut, 1)
#Close redirected stderr and replace with the original standard error.
os.dup2(origStdOut, 2)
#sys.stdout and sys.stderr don't need to be modified at all. We don't need
#to call redirectLoggerStreamHandlers since they still log to sys.stderr
#Close our extra handles to the original standard output and standard error
#streams, so we don't leak file handles.
os.close(origStdOut)
os.close(origStdErr)
#Now our file handles are in exactly the state they were in before.
#Copy back the log file to the global dir, if needed
if workerFailed:
truncateFile(tempWorkerLogPath)
jobWrapper.logJobStoreFileID = jobStore.writeFile( tempWorkerLogPath, jobWrapper.jobStoreID )
os.remove(tempWorkerLogPath)
jobStore.update(jobWrapper)
elif debugging: # write log messages
truncateFile(tempWorkerLogPath)
with open(tempWorkerLogPath, 'r') as logFile:
logMessages = logFile.read().splitlines()
statsDict.logs = [Expando(jobStoreID=jobStoreID,text=logMessage) for logMessage in logMessages]
if (debugging or config.stats or messages) and not workerFailed: # We have stats/logging to report back
jobStore.writeStatsAndLogging(json.dumps(statsDict))
#Remove the temp dir
shutil.rmtree(localWorkerTempDir)
#This must happen after the log file is done with, else there is no place to put the log
if (not workerFailed) and jobWrapper.command == None and len(jobWrapper.stack) == 0:
#We can now safely get rid of the jobWrapper
jobStore.delete(jobWrapper.jobStoreID)