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From "Doug Ivison (JIRA)" <>
Subject [jira] [Commented] (SOLR-2357) Thread Local memory leaks on restart
Date Thu, 21 Jun 2012 15:32:43 GMT


Doug Ivison commented on SOLR-2357:

Two weeks ago, this:  
...improved memory leak detection & fixing, for Tomcat 7.

Will that help with this? 

((Aside:  since our application vendor's official support is still for Tomcat 6, I hope that
Konstantin's comment at bottom makes a difference -- proposing that same fix for Tomcat 6.))
> Thread Local memory leaks on restart
> ------------------------------------
>                 Key: SOLR-2357
>                 URL:
>             Project: Solr
>          Issue Type: Bug
>          Components: contrib - Solr Cell (Tika extraction), search
>    Affects Versions: 1.4.1
>         Environment: Windows Server 2008, Apache Tomcat 7.0.8, Java 1.6.23
>            Reporter: Gus Heck
>              Labels: memory_leak, threadlocal
> Restarting solr (via a changed to a watched resource or via manager app for example)
after submitting documents with Solr-Cell, gives the following message (many many times),
and causes Tomcat to shutdown completely. 
> SEVERE: The web application [/solr] created a ThreadLocal with key of type [org.
> apache.solr.common.util.DateUtil.ThreadLocalDateFormat] (value [org.apache.solr.
> common.util.DateUtil$ThreadLocalDateFormat@dc30dfa]) and a value of type [java.t
> ext.SimpleDateFormat] (value [java.text.SimpleDateFormat@5af7aed5]) but failed t
> o remove it when the web application was stopped. Threads are going to be renewe
> d over time to try and avoid a probable memory leak.
> Feb 10, 2011 7:17:53 AM org.apache.catalina.loader.WebappClassLoader checkThread
> LocalMapForLeaks

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