[jira] [Commented] (SOLR-2357) Thread Local memory leaks on restart

["Fuad Efendi (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-2357?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15189540#comment-15189540 ] 

Fuad Efendi commented on SOLR-2357:
-----------------------------------

- Tomcat has memory leaks with custom ThreadLocal instances as a key and value.
- Tomcat 7.0.6 and later fix the problem by renewing threads in the pool.

Please see http://wiki.apache.org/tomcat/MemoryLeakProtection for details.


Can we close this issue now? Thanks,

> Thread Local memory leaks on restart
> ------------------------------------
>
>                 Key: SOLR-2357
>                 URL: https://issues.apache.org/jira/browse/SOLR-2357
>             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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