def advance(self):
try:
self.segment_dict = retrieve_sized_pickle(self._segment_file)
except EOFError:
self.segment_dict = None
self._segment_file.close()
self._segment_file = None
return
segment_row_key = _row_key(self.segment_dict)
while self._damaged_dict is not None and \
segment_row_key > _row_key(self._damaged_dict):
try:
self._damaged_dict = retrieve_sized_pickle(self._damaged_file)
except EOFError:
self._damaged_dict = None
if self._damaged_dict is None:
self.segment_dict["damaged_sequence_numbers"] = list()
return
if segment_row_key < _row_key(self._damaged_dict):
self.segment_dict["damaged_sequence_numbers"] = list()
return
if segment_row_key == _row_key(self._damaged_dict):
self.segment_dict["damaged_sequence_numbers"] = \
self._damaged_dict["sequence_numbers"]
def _repair_cluster(halt_event, zfec_server_req_socket, read_subprocess,
write_subprocess):
log = logging.getLogger("_repair_cluster")
while not halt_event.is_set():
try:
group_dict = retrieve_sized_pickle(read_subprocess.stdout)
except EOFError:
log.info("EOFError on input; assuming process complete")
break
_repair_one_sequence(zfec_server_req_socket, group_dict,
write_subprocess)
def __init__(self, work_dir, node_name):
path = compute_segment_file_path(work_dir, node_name)
self._segment_file = gzip.GzipFile(filename=path, mode="rb")
path = compute_damaged_segment_file_path(work_dir, node_name)
self._damaged_file = gzip.GzipFile(filename=path, mode="rb")
self.segment_dict = None
try:
self._damaged_dict = retrieve_sized_pickle(self._damaged_file)
except EOFError:
self._damaged_dict = None
self.advance()
def _repair_cluster(halt_event,
zfec_server_req_socket,
read_subprocess,
write_subprocess):
log = logging.getLogger("_repair_cluster")
while not halt_event.is_set():
try:
group_dict = retrieve_sized_pickle(read_subprocess.stdout)
except EOFError:
log.info("EOFError on input; assuming process complete")
break
_repair_one_sequence(zfec_server_req_socket,
group_dict,
write_subprocess)
def _node_generator(halt_event, node_name, node_subprocess):
log = logging.getLogger(node_name)
while not halt_event.is_set():
try:
yield retrieve_sized_pickle(node_subprocess.stdout)
except EOFError:
log.info("EOFError, assuming processing complete")
break
returncode = node_subprocess.poll()
if returncode is None:
log.warn("subprocess still running")
node_subprocess.terminate()
log.debug("waiting for subprocess to terminate")
returncode = node_subprocess.wait()
if returncode == 0:
log.debug("subprocess terminated normally")
else:
log.warn("subprocess returned {0}".format(returncode))
def _node_generator(halt_event, node_name, node_subprocess):
log = logging.getLogger(node_name)
while not halt_event.is_set():
try:
yield retrieve_sized_pickle(node_subprocess.stdout)
except EOFError:
log.info("EOFError, assuming processing complete")
break
returncode = node_subprocess.poll()
if returncode is None:
log.warn("subprocess still running")
node_subprocess.terminate()
log.debug("waiting for subprocess to terminate")
returncode = node_subprocess.wait()
if returncode == 0:
log.debug("subprocess terminated normally")
else:
log.warn("subprocess returned {0}".format(returncode))
def _process_repair_entries(index, source_node_name, req_socket):
log = logging.getLogger("_process_repair_entries")
repair_file_path = compute_data_repair_file_path()
log.debug("opening {0}".format(repair_file_path))
repair_file = gzip.GzipFile(filename=repair_file_path, mode="rb")
record_number = 0
while True:
try:
row_key, segment_status, segment_data = \
retrieve_sized_pickle(repair_file)
except EOFError:
log.debug("EOF at record number {0}".format(record_number))
repair_file.close()
return record_number
damaged_sequence_numbers = list()
for segment_row in segment_data:
damaged_sequence_numbers.extend(
segment_row["damaged_sequence_numbers"])
segment_row = segment_data[index]
record_number += 1
result = {"record_number" : record_number,
"action" : None,
"part" : None,
"zfec_padding_size" : None,
"source_node_name" : source_node_name,
"segment_num" : segment_row["segment_num"],
"result" : None,
"data" : None,}
expected_slice_count = \
compute_expected_slice_count(segment_row["file_size"])
for sequence_num in range(0, expected_slice_count):
result["data"] = None
if sequence_num in damaged_sequence_numbers:
log.debug("{0} damaged sequence {1}".format(row_key,
sequence_num))
result["action"] = "read"
result["part"] = _compute_part_label(sequence_num,
expected_slice_count)
try:
result["zfec_padding_size"], data = \
_get_sequence_from_data_reader(req_socket,
segment_row,
sequence_num)
except Exception as instance:
log.exception("record #{0} sequence {1} {2}".format(
record_number, sequence_num, instance))
result["result"] = "error"
else:
result["result"] = "success"
result["data"] = data
else:
result["action"] = "skip"
result["result"] = None
unified_id, conjoined_part = row_key
sequence_key = (unified_id,
conjoined_part,
sequence_num,
segment_row["segment_num"])
log.debug("storing {0} {1}".format(sequence_key,
result["action"]))
store_sized_pickle((sequence_key, segment_status, result, ),
sys.stdout.buffer)
