[Freeswitch-users] Threads remain after calling close on Java client

[Neil Davis]

Hi,



I built a web application that connects to Freeswitch using the
org.freeswitch.esl.client.Client.  I connect the Client object from a
Spring annotated service that I call from a Spring controller.  I put the
connected client in my ServletContext, so I can access it later to call
client.cancelEventSubscriptions() and client.close() from my
ServletContextListener contextDestroyed method when Tomcat is shutting down.



The problem I'm having is that even after I call close on the client, there
are still a bunch of active threads that the client has spawned in the
background.  These threads are causing Tomcat to hang when I'm shutting
down.  Can anyone suggest an approach that would enable my application to
disconnect the Freeswitch client when Tomcat is shutting down that would
allow Tomcat to shutdown gracefully?



Below are errors from my Tomcat log for the threads that I have identified
as being related to the Freeswitch client.  I don't know how I can get to
these threads to interrupt them and Client.close() seems to leave them
hanging.



Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-1] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-3-thread-1] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-4-thread-1] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-2] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-3] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-4] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-5] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-6] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-7] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-8] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-9] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-10] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-11] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-12] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-13] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-14] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-15] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
clearReferencesThreads

SEVERE: The web application [/socketspy] appears to have started a thread
named [pool-5-thread-16] but has failed to stop it. This is very likely to
create a memory leak.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
checkThreadLocalMapForLeaks

SEVERE: The web application [/socketspy] created a ThreadLocal with key of
type [org.jboss.netty.util.internal.ThreadLocalBoolean] (value
[org.jboss.netty.util.internal.ThreadLocalBoolean at 186e192]) and a value of
type [java.lang.Boolean] (value [false]) 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.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
checkThreadLocalMapForLeaks

SEVERE: The web application [/socketspy] created a ThreadLocal with key of
type [org.jboss.netty.util.CharsetUtil$1] (value
[org.jboss.netty.util.CharsetUtil$1 at 14d8e1]) and a value of type
[java.util.IdentityHashMap] (value
[{windows-1252=sun.nio.cs.MS1252$Encoder at 373f86}]) 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.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
checkThreadLocalMapForLeaks

SEVERE: The web application [/socketspy] created a ThreadLocal with key of
type [org.jboss.netty.util.internal.ThreadLocalRandom$1] (value
[org.jboss.netty.util.internal.ThreadLocalRandom$1 at 12bb519]) and a value of
type [org.jboss.netty.util.internal.ThreadLocalRandom] (value
[org.jboss.netty.util.internal.ThreadLocalRandom at 7e9dbc]) 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.

Dec 16, 2011 12:04:59 PM org.apache.catalina.loader.WebappClassLoader
checkThreadLocalMapForLeaks

SEVERE: The web application [/socketspy] created a ThreadLocal with key of
type [org.jboss.netty.util.CharsetUtil$1] (value
[org.jboss.netty.util.CharsetUtil$1 at 14d8e1]) and a value of type
[java.util.IdentityHashMap] (value
[{windows-1252=sun.nio.cs.MS1252$Encoder at a5b041}]) 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.





Thanks,



Neil Davis
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