Re: [ZODB-Dev] Deadlock in ZODB/DB.py?
[Christian Zagrodnick] the DB.open method makes me wonder how it works (http://svn.zope.org/ ZODB/trunk/src/ZODB/DB.py?rev=69551&view=auto) It locks with self._a() and calls self._connectionMap which locks too. I cannot imagine a way this could possibly work. Look at __init__(): x = threading.RLock() self._a = x.acquire self._r = x.release That is, it's a reentrant lock. See the Python docs for RLock(). I guess the lock should be released before the _connectionMap call? No. Interestingly both all the tests pass and ZODB works... That was a good clue ;-) ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
[ZODB-Dev] Deadlock in ZODB/DB.py?
Hi there, the DB.open method makes me wonder how it works (http://svn.zope.org/ ZODB/trunk/src/ZODB/DB.py?rev=69551&view=auto) It locks with self._a() and calls self._connectionMap which locks too. I cannot imagine a way this could possibly work. I guess the lock should be released before the _connectionMap call? Interestingly both all the tests pass and ZODB works... -- Christian Zagrodnick gocept gmbh & co. kg · forsterstrasse 29 · 06112 halle/saale www.gocept.com · fon. +49 345 12298894 · fax. +49 345 12298891 smime.p7s Description: S/MIME cryptographic signature ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
