Bug #43107 merlin 2.0.4.7138 stack overflow error

Description:
See attached file for stack overflow errors.

How to repeat:
This appears to have been a one off incident.

Stack overflow messages

Attachment: stackoverflow.rtf (application/rtf, text), 77.95 KiB.

Received 8 more stack dumps today which I have to include as files as they don't fit here. I'll include 1, if you want them all let me know.

I guess this may be related to viewing more graphs over a longer time period (1 week as we don't have more data), but this may be wrong.

Finally included 3 dumps.

Attachment: dumps.tar.gz (application/x-gzip, text), 12.10 KiB.

We are still getting stack overflows. It seems mainly related to viewing graphs.

Today we had 7 at around the same time 9:53. They are too large to paste into this comment field. So the problem is not a one off. We also had to restart tomcat to resolve some responsiveness problems.

How do you want me to send these stack traces as copy/pasting from the mail messages that merlin sends is a bit tedious.

Reproduced in a test case where, if entities are not in hibernate L2 cache, it gets into an infinite loop/recursion trying to load the server graph object(s).

revision-id: oldag@mysql.com-20090310211644-waq2x0i8zzhr1ul6
parent: mark@mysql.com-20090303204420-3dca795wm19af9zt
committer: Darren L. Oldag <oldag@mysql.com>
branch nick: Trunk
timestamp: Tue 2009-03-10 16:16:44 -0500
message:
  http://bugs.mysql.com/bug.php?id=43107
  
  due to an outstanding hibernate issue,
  http://opensource.atlassian.com/projects/hibernate/browse/EJB-225,
  
  we have to force a lazy relationship inside an embedded composite
  primary key. otherwise, hibernate goes into an infinite recursion
  trying to load one of the relationships.

patches pushed to both 2.0 maintenance and trunk (current 2.1) trees.

Patch installed in version 2.0.5.7152.

verified fixed in build 2.0.5.7152

An entry has been added to the 2.0.5 changelog:

MySQL Enterprise Monitor generated a stack overflow. This was as a result of a bug in Hibernate, which caused Hibernate to enter infinite recursion while trying to load a relationship.