Jira crash with OutOfMemoryError

Jira crashes frequently (once a day) with an OutOfMemory Error. The final error message does not contain additional information.

*Stderr

19/Mar/2012 11:50:47 org.apache.coyote.http11.Http11AprProtocol pause
INFO: Pausing Coyote HTTP/1.1 on http-80
19/Mar/2012 11:50:47 org.apache.coyote.http11.Http11AprProtocol pause
INFO: Pausing Coyote HTTP/1.1 on http-8080
19/Mar/2012 11:50:48 org.apache.catalina.core.StandardService stop
INFO: Stopping service Catalina
19/Mar/2012 11:50:50 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [/gta] appears to have started a thread named [JonasBatch] but has failed to stop it. This is very likely to create a memory leak.
19/Mar/2012 11:50:50 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [/gta] appears to have started a thread named [JonasClock] but has failed to stop it. This is very likely to create a memory leak.
19/Mar/2012 11:50:50 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application [/gta] created a ThreadLocal with key of type [com.atlassian.jira.util.ImportUtils$2] (value [com.atlassian.jira.util.ImportUtils$2@99b6af]) and a value of type [java.lang.Boolean] (value [true]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
19/Mar/2012 11:50:50 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application [/gta] created a ThreadLocal with key of type [com.atlassian.jira.util.ImportUtils$1] (value [com.atlassian.jira.util.ImportUtils$1@1a8d7fd]) and a value of type [java.lang.Boolean] (value [false]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
19/Mar/2012 11:50:50 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application [/gta] created a ThreadLocal with key of type [com.atlassian.jira.util.ImportUtils$3] (value [com.atlassian.jira.util.ImportUtils$3@1fc572f]) and a value of type [java.lang.Boolean] (value [true]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
19/Mar/2012 11:50:50 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
SEVERE: The web application [/gta] created a ThreadLocal with key of type [java.lang.ThreadLocal] (value [java.lang.ThreadLocal@1bfe745]) and a value of type [com.atlassian.jira.issue.index.SearcherCache] (value [com.atlassian.jira.issue.index.SearcherCache@1e8941f]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
19/Mar/2012 11:50:51 org.apache.coyote.http11.Http11AprProtocol destroy
INFO: Stopping Coyote HTTP/1.1 on http-80
19/Mar/2012 11:50:51 org.apache.catalina.core.StandardService stop
SEVERE: Failed to stop connector [Connector[HTTP/1.1-80]]
LifecycleException: Protocol handler destroy failed: java.lang.NullPointerException
at org.apache.catalina.connector.Connector.stop(Connector.java:1155)
at org.apache.catalina.core.StandardService.stop(StandardService.java:613)
at org.apache.catalina.core.StandardServer.stop(StandardServer.java:788)
at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:408)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:338)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:416)
19/Mar/2012 11:50:51 org.apache.catalina.connector.Connector stop
SEVERE: Coyote connector has not been started

2012-03-19 11:50:51 Commons Daemon procrun stderr initialized
19/Mar/2012 11:50:53 org.apache.catalina.core.AprLifecycleListener init
INFO: Loaded APR based Apache Tomcat Native library 1.1.20.
19/Mar/2012 11:50:53 org.apache.catalina.core.AprLifecycleListener init
INFO: APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true].
19/Mar/2012 11:50:53 org.apache.catalina.startup.SetAllPropertiesRule begin
WARNING: [SetAllPropertiesRule]

{Server/Service/Connector} Setting property 'maxSpareThreads' to '75' did not find a matching property.
19/Mar/2012 11:50:53 org.apache.catalina.startup.SetAllPropertiesRule begin
WARNING: [SetAllPropertiesRule]{Server/Service/Connector}

Setting property 'minSpareThreads' to '25' did not find a matching property.
19/Mar/2012 11:50:53 org.apache.catalina.startup.SetAllPropertiesRule begin
WARNING: [SetAllPropertiesRule]

{Server/Service/Connector} Setting property 'maxSpareThreads' to '75' did not find a matching property.
19/Mar/2012 11:50:53 org.apache.catalina.startup.SetAllPropertiesRule begin
WARNING: [SetAllPropertiesRule]{Server/Service/Connector}

Setting property 'minSpareThreads' to '25' did not find a matching property.
19/Mar/2012 11:50:54 org.apache.coyote.http11.Http11AprProtocol init
INFO: Initializing Coyote HTTP/1.1 on http-80
19/Mar/2012 11:50:54 org.apache.coyote.http11.Http11AprProtocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
19/Mar/2012 11:50:54 org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1398 ms
19/Mar/2012 11:50:54 org.apache.catalina.realm.JAASRealm setContainer
INFO: Set JAAS app name Catalina
19/Mar/2012 11:50:54 org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
19/Mar/2012 11:50:54 org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.32
19/Mar/2012 11:52:09 org.apache.coyote.http11.Http11AprProtocol start
INFO: Starting Coyote HTTP/1.1 on http-80
19/Mar/2012 11:52:09 org.apache.coyote.http11.Http11AprProtocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
19/Mar/2012 11:52:09 org.apache.catalina.startup.Catalina start
INFO: Server startup in 74984 ms
java.lang.OutOfMemoryError