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Removed "annoying" messages on log when need to retry database accesss

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This commit is contained in:
Adolfo Gómez García 2017-04-17 22:52:31 +02:00
parent 2b5cf494db
commit 8cbfcbb104
2 changed files with 10 additions and 6 deletions
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3
server/src/uds/__init__.py
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@ -46,7 +46,7 @@ import logging
logger = logging.getLogger(__name__)
__updated__ = '2017-01-30'
__updated__ = '2017-04-17'
# Default ssl context is unverified, as MOST servers that we will connect will be with self signed certificates...
@ -91,6 +91,7 @@ def extend_sqlite(connection=None, **kwargs):
cursor.execute('PRAGMA synchronous=OFF')
cursor.execute('PRAGMA cache_size=8000')
cursor.execute('PRAGMA temp_store=MEMORY')
cursor.execute('PRAGMA journal_mode=WAL')
connection.connection.create_function("MIN", 2, min)
connection.connection.create_function("MAX", 2, max)
connection.connection.create_function("CEIL", 1, math.ceil)

11
server/src/uds/core/jobs/Scheduler.py
View File

@ -43,7 +43,7 @@ import threading
import time
import logging
__updated__ = '2016-05-18'
__updated__ = '2017-04-17'
logger = logging.getLogger(__name__)
@ -83,7 +83,7 @@ class JobThread(threading.Thread):
connection.close()
except Exception as e:
logger.error('On job executor, closing db connection: {}'.format(e))
logger.info('Database access failed... Retrying')
# logger.info('Database access failed... Retrying')
time.sleep(1)
# Ensures DB connection is released after job is done
@ -159,13 +159,13 @@ class Scheduler(object):
except IndexError:
# Do nothing, there is no jobs for execution
return
except DatabaseError:
except DatabaseError as e:
# Whis will happen whenever a connection error or a deadlock error happens
# This in fact means that we have to retry operation, and retry will happen on main loop
# Look at this http://dev.mysql.com/doc/refman/5.0/en/innodb-deadlocks.html
# I have got some deadlock errors, but looking at that url, i found that it is not so abnormal
# logger.debug('Deadlock, no problem at all :-) (sounds hards, but really, no problem, will retry later :-) )')
raise DatabaseError('Database access problems. Retrying connection')
raise DatabaseError('Database access problems. Retrying connection ({})'.format(e))
@staticmethod
def releaseOwnShedules():
@ -192,6 +192,9 @@ class Scheduler(object):
time.sleep(self.granularity)
self.executeOneJob()
except Exception as e:
# This can happen often on sqlite, and this is not problem at all as we recover it.
# The log is removed so we do not get increased workers.log file size with no information at all
if not isinstance(e, DatabaseError):
logger.error('Unexpected exception at run loop {0}: {1}'.format(e.__class__, e))
try:
connection.close()