def debug_statistics(self):
return {
"node":
lib.raft_get_nodeid(self.raft),
"state":
state2str(lib.raft_get_state(self.raft)),
"current_idx":
lib.raft_get_current_idx(self.raft),
"last_log_term":
lib.raft_get_last_log_term(self.raft),
"current_term":
lib.raft_get_current_term(self.raft),
"commit_idx":
lib.raft_get_commit_idx(self.raft),
"last_applied_idx":
lib.raft_get_last_applied_idx(self.raft),
"log_count":
lib.raft_get_log_count(self.raft),
"peers":
lib.raft_get_num_nodes(self.raft),
"voting_peers":
lib.raft_get_num_voting_nodes(self.raft),
"connection_status":
connectstatus2str(self.connection_status),
"voting_change_in_progress":
lib.raft_voting_change_is_in_progress(self.raft),
"removed":
getattr(self, 'removed', False),
}
def _check_committed_entry_popping(self, ety_idx):
"""
Check we aren't popping a committed entry
"""
try:
assert lib.raft_get_commit_idx(self.raft) < ety_idx
except Exception as e:
self.abort_exception = e
return lib.RAFT_ERR_SHUTDOWN
return 0
def _check_log_matching(self, our_log, idx):
"""
Quality:
Log Matching: if two logs contain an entry with the same index and
term, then the logs are identical in all entries up through the given
index. §5.3
State Machine Safety: if a server has applied a log entry at a given
index to its state machine, no other server will ever apply a
different log entry for the same index. §5.4.3
"""
for server in self.network.active_servers:
if server is self:
continue
their_commit_idx = lib.raft_get_commit_idx(server.raft)
if lib.raft_get_commit_idx(
self.raft) <= their_commit_idx and idx <= their_commit_idx:
their_log = lib.raft_get_entry_from_idx(server.raft, idx)
if their_log == ffi.NULL:
assert idx < lib.raft_get_snapshot_last_idx(self.raft)
if their_log.type in [lib.RAFT_LOGTYPE_NORMAL]:
try:
assert their_log.term == our_log.term
assert their_log.id == our_log.id
except Exception as e:
ety1 = lib.raft_get_entry_from_idx(self.raft, idx)
ety2 = lib.raft_get_entry_from_idx(server.raft, idx)
logger.error('ids', ety1.id, ety2.id)
logger.error(
'{0}vs{1} idx:{2} terms:{3} {4} ids:{5} {6}'.
format(self, server, idx, our_log.term,
their_log.term, our_log.id, their_log.id))
self.abort_exception = e
logger.error(self.debug_log())
logger.error(server.debug_log())
return lib.RAFT_ERR_SHUTDOWN
lib.raft_entry_release(their_log)