Red Hat Bugzilla – Bug 833202
transaction retries need to be cache aware
Last modified: 2013-02-21 03:18:08 EST
This bug is created as a clone of upstream ticket: https://fedorahosted.org/389/ticket/335 The code that resets the original entries/mods/etc. when retrying deadlocked transactions in ldbm_back_delete et. al. need to be cache aware when deleting entries that are cached - for example, ldbm_delete.c:485 {{{ backentry_free(&e); }}} The problem is that e is cached, so cannot be freed like this. Freeing cached entries seems to cause problems in the server, assertion failures, other crashes.
Please add steps to verify this bug
The attached test scripts and steps in this comment can be shared for verifying this bug. https://bugzilla.redhat.com/show_bug.cgi?id=834096#c7 After running the test, run search all. ldapsearch -x ... -b "dc=example,dc=com" >> OUTPUT0 Restart the server and run search all, again. ldapsearch -x ... -b "dc=example,dc=com" >> OUTPUT1 The 2 outputs OUTPUT0 and OUTPUT1 are supposed to be identical (to ensure the cache reflects the entries in DB).
Also covered by the new test multi_plugin - the stress test testcases/DS/6.0/multi_plugin ------------------------------------------------------------------------ r6706 | rmeggins@REDHAT.COM | 2012-07-07 08:24:23 -0600 (Sat, 07 Jul 2012) | 16 lines Add multi_plugin test suite This test enables and configures multiple plugins in the style of ipa. The stress version of this test will enable the TXN_TESTING in the server which will exercise the txn deadlock and retry code paths in the server. Tickets covered by this test: Ticket #345 - db deadlock return should not log error Ticket #387 - managed entry sometimes doesn't delete the managed entry Ticket #360 - ldapmodify returns Operations error Ticket #335 - transaction retries need to be cache aware Bugs covered by this test: 830336 db deadlock return should not log error 830343 managed entry sometimes doesn't delete the managed entry 833218 ldapmodify returns Operations error 833202 transaction retries need to be cache aware
On RHEL 6.4 Snapshot 5 with 389-ds-base-1.2.11.15-11.el6.x86_64: multi_plugin startup 100% (1/1) multi_plugin run 100% (6/6) multi_plugin cleanup 100% (1/1) Verified.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHSA-2013-0503.html