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https://issues.apache.org/jira/browse/WW-4361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14029195#comment-14029195
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Lukasz Lenart commented on WW-4361:
-----------------------------------
Struts version?
> Memory Leak Issue
> -----------------
>
> Key: WW-4361
> URL: https://issues.apache.org/jira/browse/WW-4361
> Project: Struts 2
> Issue Type: Bug
> Environment: Struts 2, Hibernate
> Reporter: MOHAMED IRFANULLA
>
> {noformat}
> SEVERE: The web application [/MyApplication] registered the JDBC driver
> [oracle.jdbc.driver.OracleDriver] but failed to unregister it when the web
> application was stopped. To prevent a memory leak, the JDBC Driver has been
> forcibly unregistered.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesJdbc
> SEVERE: The web application [/MyApplication] registered the JDBC driver
> [org.postgresql.Driver] but failed to unregister it when the web application
> was stopped. To prevent a memory leak, the JDBC Driver has been forcibly
> unregistered.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesThreads
> SEVERE: The web application [/MyApplication] appears to have started a thread
> named [Timer-0] but has failed to stop it. This is very likely to create a
> memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesThreads
> SEVERE: The web application [/MyApplication] appears to have started a thread
> named [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0] but
> has failed to stop it. This is very likely to create a memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesThreads
> SEVERE: The web application [/MyApplication] appears to have started a thread
> named [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1] but
> has failed to stop it. This is very likely to create a memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesThreads
> SEVERE: The web application [/MyApplication] appears to have started a thread
> named [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] but
> has failed to stop it. This is very likely to create a memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesThreads
> SEVERE: The web application [/MyApplication] appears to have started a thread
> named [Timer-1] but has failed to stop it. This is very likely to create a
> memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesThreads
> SEVERE: The web application [/MyApplication] appears to have started a thread
> named [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0] but
> has failed to stop it. This is very likely to create a memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesThreads
> SEVERE: The web application [/MyApplication] appears to have started a thread
> named [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1] but
> has failed to stop it. This is very likely to create a memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> clearReferencesThreads
> SEVERE: The web application [/MyApplication] appears to have started a thread
> named [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] but
> has failed to stop it. This is very likely to create a memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> checkThreadLocalMapForLeaks
> SEVERE: The web application [/MyApplication] created a ThreadLocal with key
> of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value
> [com.opensymphony.xwork2.inject.ContainerImpl$10@5e6dd64b]) and a value of
> type [java.lang.Object[]] (value [[Ljava.lang.Object;@7d10065b]) but failed
> to remove it when the web application was stopped. Threads are going to be
> renewed over time to try and avoid a probable memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> checkThreadLocalMapForLeaks
> SEVERE: The web application [/MyApplication] created a ThreadLocal with key
> of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value
> [com.opensymphony.xwork2.inject.ContainerImpl$10@5e6dd64b]) and a value of
> type [java.lang.Object[]] (value [[Ljava.lang.Object;@27118082]) but failed
> to remove it when the web application was stopped. Threads are going to be
> renewed over time to try and avoid a probable memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> checkThreadLocalMapForLeaks
> SEVERE: The web application [/MyApplication] created a ThreadLocal with key
> of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value
> [com.opensymphony.xwork2.inject.ContainerImpl$10@5e6dd64b]) and a value of
> type [java.lang.Object[]] (value [[Ljava.lang.Object;@6e0bead7]) but failed
> to remove it when the web application was stopped. Threads are going to be
> renewed over time to try and avoid a probable memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> checkThreadLocalMapForLeaks
> SEVERE: The web application [/MyApplication] created a ThreadLocal with key
> of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value
> [com.opensymphony.xwork2.inject.ContainerImpl$10@5e6dd64b]) and a value of
> type [java.lang.Object[]] (value [[Ljava.lang.Object;@506701b2]) but failed
> to remove it when the web application was stopped. Threads are going to be
> renewed over time to try and avoid a probable memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> checkThreadLocalMapForLeaks
> SEVERE: The web application [/MyApplication] created a ThreadLocal with key
> of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value
> [com.opensymphony.xwork2.inject.ContainerImpl$10@5e6dd64b]) and a value of
> type [java.lang.Object[]] (value [[Ljava.lang.Object;@1aa0765b]) but failed
> to remove it when the web application was stopped. Threads are going to be
> renewed over time to try and avoid a probable memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> checkThreadLocalMapForLeaks
> SEVERE: The web application [/MyApplication] created a ThreadLocal with key
> of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value
> [com.opensymphony.xwork2.inject.ContainerImpl$10@5e6dd64b]) and a value of
> type [java.lang.Object[]] (value [[Ljava.lang.Object;@1cba5e05]) but failed
> to remove it when the web application was stopped. Threads are going to be
> renewed over time to try and avoid a probable memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> checkThreadLocalMapForLeaks
> SEVERE: The web application [/MyApplication] created a ThreadLocal with key
> of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value
> [com.opensymphony.xwork2.inject.ContainerImpl$10@5e6dd64b]) and a value of
> type [java.lang.Object[]] (value [[Ljava.lang.Object;@f72a8ff]) but failed to
> remove it when the web application was stopped. Threads are going to be
> renewed over time to try and avoid a probable memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> checkThreadLocalMapForLeaks
> SEVERE: The web application [/MyApplication] created a ThreadLocal with key
> of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value
> [com.opensymphony.xwork2.inject.ContainerImpl$10@5e6dd64b]) and a value of
> type [java.lang.Object[]] (value [[Ljava.lang.Object;@30b50545]) but failed
> to remove it when the web application was stopped. Threads are going to be
> renewed over time to try and avoid a probable memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> checkThreadLocalMapForLeaks
> SEVERE: The web application [/MyApplication] created a ThreadLocal with key
> of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value
> [com.opensymphony.xwork2.inject.ContainerImpl$10@5e6dd64b]) and a value of
> type [java.lang.Object[]] (value [[Ljava.lang.Object;@3c6d0dfe]) but failed
> to remove it when the web application was stopped. Threads are going to be
> renewed over time to try and avoid a probable memory leak.
> Jun 12, 2014 7:47:33 PM org.apache.catalina.loader.WebappClassLoader
> checkThreadLocalMapForLeaks
> SEVERE: The web application [/MyApplication] created a ThreadLocal with key
> of type [com.opensymphony.xwork2.inject.ContainerImpl$10] (value
> [com.opensymphony.xwork2.inject.ContainerImpl$10@5e6dd64b]) and a value of
> type [java.lang.Object[]] (value [[Ljava.lang.Object;@1bb1bdb0]) but failed
> to remove it when the web application was stopped. Threads are going to be
> renewed over time to try and avoid a probable memory leak.
> {noformat}
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