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https://issues.apache.org/jira/browse/SOLR-2357?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13021062#comment-13021062
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Jan Høydahl commented on SOLR-2357:
-----------------------------------
The offending piece of code is in org.apache.solr.schema.DateField:
{code}
private final static ThreadLocalDateFormat fmtThreadLocal
= new ThreadLocalDateFormat(new ISO8601CanonicalDateFormat());
{code}
How can we avoid that Tomcat complains about the possible memory leak?
finalize() won't work for final variables.
> 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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