Classloader memory leak because of ThreadLocal in ResultObjectFactoryUtil
-------------------------------------------------------------------------
Key: IBATIS-540
URL: https://issues.apache.org/jira/browse/IBATIS-540
Project: iBatis for Java
Issue Type: Bug
Components: SQL Maps
Affects Versions: 2.3.3, 2.3.4
Reporter: Sylvain Laurent
Attachments: ibatis patch for classloader memleak.txt
I'm using iBatis in a webapp with Spring and facing memory leaks upon
redeployment oft he webapp.
I tracked the leaks to ibatis, where the class ResultObjectFactoryUtil has a
static ThreadLocal factorySettings
The problem is that the value bound to a Thread through this ThreadLocal is
never nullified, and since the "factorySettings" is a static variable, the
ThreadLocal instance is reachable as long as the ClassLoader of the webapp is
reachable. But since the FactorySettings instance is bound to the Thread
through a strong reference (see the JDK implementation of ThreadLocal in
ThreadLocalMap$Entry), the classloader is finally never collected...
The solution is to always cleanup the ThreadLocal after usage (in SqlExecurtor)
I attach a patch for iBatis 2.3.4 to this issue
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
