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Fix #4264 (Intermittent Database Exception)

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This commit is contained in:
Kovid Goyal 2009-12-23 18:24:15 -07:00
parent 2346be7553
commit 059b4c646a
1 changed files with 11 additions and 2 deletions
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13
src/calibre/library/sqlite.py
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@ -8,7 +8,7 @@ Wrapper for multi-threaded access to a single sqlite database connection. Serial
all calls.
'''
import sqlite3 as sqlite, traceback, time, uuid
from sqlite3 import IntegrityError
from sqlite3 import IntegrityError, OperationalError
from threading import Thread
from Queue import Queue
from threading import RLock
@ -139,7 +139,16 @@ class DBThread(Thread):
else:
func = getattr(self.conn, func)
try:
ok, res = True, func(*args, **kwargs)
for i in range(3):
try:
ok, res = True, func(*args, **kwargs)
break
except OperationalError, err:
# Retry if unable to open db file
if 'unable to open' not in str(err) or i == 2:
raise
traceback.print_exc()
time.sleep(0.5)
except Exception, err:
ok, res = False, (err, traceback.format_exc())
self.results.put((ok, res))