you keep with holding information,
post the entire thread dump, in its native format
Filip
Barak Yaish wrote:
My mistake, you right. There is one thread waiting for a db connection from
the pool:
where 0x184e
[1] java.lang.Object.wait (native method)
[2] com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable
(BasicResourcePool.java:1,315)
[3] com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource
(BasicResourcePool.java:557)
[4] com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource
(BasicResourcePool.java:477)
[5]
com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection
(C3P0PooledConnectionPool.java:525)
[6] com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection
(AbstractPoolBackedDataSource.java:128)
[7] org.hibernate.connection.C3P0ConnectionProvider.getConnection
(C3P0ConnectionProvider.java:35)
[8] org.hibernate.jdbc.ConnectionManager.openConnection
(ConnectionManager.java:417)
[9] org.hibernate.jdbc.ConnectionManager.getConnection
(ConnectionManager.java:144)
[10] org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement
(AbstractBatcher.java:139)
[11] org.hibernate.loader.Loader.prepareQueryStatement (Loader.java:1,561)
[12] org.hibernate.loader.Loader.doQuery (Loader.java:661)
[13] org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections
(Loader.java:224)
[14] org.hibernate.loader.Loader.doList (Loader.java:2,145)
[15] org.hibernate.loader.Loader.listIgnoreQueryCache (Loader.java:2,029)
[16] org.hibernate.loader.Loader.list (Loader.java:2,024)
[17] org.hibernate.loader.hql.QueryLoader.list (QueryLoader.java:392)
[18] org.hibernate.hql.ast.QueryTranslatorImpl.list
(QueryTranslatorImpl.java:333)
[19] org.hibernate.engine.query.HQLQueryPlan.performList
(HQLQueryPlan.java:172)
[20] org.hibernate.impl.SessionImpl.list (SessionImpl.java:1,114)
[21] org.hibernate.impl.QueryImpl.list (QueryImpl.java:79)
[22] org.hibernate.ejb.QueryImpl.getResultList (QueryImpl.java:53)
[23] com.barak.persitence.EntityManagerImpl.all
(EntityManagerImpl.java:148)
[24] com.barak.deamon.lookup.LookupDaemon.execute (LookupDaemon.java:271)
[25] com.barak.daemon.StatefulDaemon.run (StatefulDaemon.java:68)
So, my next question is: why this stuck thread causes the entire Tomcat to
hang? This thread used as a daemon (building a mini cache), and not
participate when serving an incoming HTTP request.
The entire (almost) thread dump of Tomcat:
Group system:
(java.lang.ref.Reference$ReferenceHandler)0x1833
Reference Handler cond.
waiting
(java.lang.ref.Finalizer$FinalizerThread)0x1834
Finalizer cond.
waiting
(java.lang.Thread)0x1835
Signal Dispatcher running
(java.lang.Thread)0x1836
RMI Scheduler(0) cond.
waiting
(java.lang.Thread)0x1837
RMI RenewClean-[prod29:37355] cond. waiting
(sun.misc.GC$Daemon)0x1838
GC Daemon cond.
waiting
(java.lang.Thread)0x1839
RMI RenewClean-[prod31:45514] cond. waiting
(java.lang.Thread)0x183a
RMI RenewClean-[prod7:46845] cond. waiting
(java.lang.Thread)0x183b
RMI RenewClean-[prod15:33128] cond. waiting
(java.lang.Thread)0x183c
RMI RenewClean-[prod12:45154] cond. waiting
Group main:
(java.lang.Thread)0x183f
main running
(java.util.TimerThread)0x1840
Timer-0 cond.
waiting
(com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread)0x1841
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0 cond.
waiting
(com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread)0x1842
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1 cond.
waiting
(com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread)0x1843
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2 cond.
waiting
(java.util.TimerThread)0x1845
Timer-1 cond.
waiting
(com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread)0x1846
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0 cond.
waiting
(com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread)0x1847
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1 cond.
waiting
(com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread)0x1848
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2 cond.
waiting
(java.util.TimerThread)0x184a
Timer-2 cond.
waiting
(com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread)0x184b
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0 cond.
waiting
(com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread)0x184c
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1 cond.
waiting
(com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread)0x184d
com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2 cond.
waiting
(com.barak.deamon.lookup.LookupDaemon)0x184e Thread-18
cond. waiting
(com.barak.deamon.logger.LoggerDaemon2)0x184f Thread-19
sleeping
(com.barak.deamon.loadbalancing.LoadBalancerDaemon)0x1850 Thread-20
sleeping
(java.util.TimerThread)0x1851
Timer-3 cond.
waiting
(java.lang.Thread)0x1852
ContainerBackgroundProcessor[StandardEngine[Catalina]] sleeping
(java.lang.Thread)0x1853
http-80-Monitor cond.
waiting
(org.apache.tomcat.util.threads.ThreadWithAttributes)0x1854
TP-Processor1 cond.
waiting
(org.apache.tomcat.util.threads.ThreadWithAttributes)0x1855
TP-Processor2 cond.
waiting
(org.apache.tomcat.util.threads.ThreadWithAttributes)0x1856
TP-Processor3 cond.
waiting
(org.apache.tomcat.util.threads.ThreadWithAttributes)0x1857
TP-Processor4 running
(java.lang.Thread)0x1858
TP-Monitor cond.
waiting
(java.lang.Thread)0x1859
pool-1-thread-1 cond.
waiting
(java.lang.Thread)0x185a
pool-1-thread-2 cond.
waiting
(java.lang.Thread)0x185b
pool-1-thread-3 cond.
waiting
(java.lang.Thread)0x185c
pool-1-thread-4 cond.
waiting
(java.lang.Thread)0x185d
pool-1-thread-5 cond.
waiting
(java.lang.Thread)0x185e
pool-1-thread-6 cond.
waiting
(java.lang.Thread)0x185f
pool-1-thread-7 cond.
waiting
(java.lang.Thread)0x1860
pool-1-thread-8 cond.
waiting
(org.apache.tomcat.util.threads.ThreadWithAttributes)0x1959
http-80-Processor552 cond.
waiting
(org.apache.tomcat.util.threads.ThreadWithAttributes)0x195a
http-80-Processor682 cond.
waiting
(org.apache.tomcat.util.threads.ThreadWithAttributes)0x195b
http-80-Processor722 cond.
waiting
(org.apache.tomcat.util.threads.ThreadWithAttributes)0x195c
http-80-Processor729 cond.
waiting
(org.apache.tomcat.util.threads.ThreadWithAttributes)0x195d
http-80-Processor731 cond.
waiting
Thanks for helping quickly!!
Barak.
-----Original Message-----
From: Caldarale, Charles R [mailto:[EMAIL PROTECTED]
Sent: Monday, April 28, 2008 3:35 PM
To: Tomcat Users List
Subject: RE: Tomcat HTTTP Connectior Hangs
From: Barak Yaish [mailto:[EMAIL PROTECTED]
Subject: Tomcat HTTTP Connectior Hangs
thread dump of the JVM running the tomcat does not show
any stuck thread
The above is rather hard to believe - you might want to post the thread
dump, or at least non-duplicate parts of it.
Are your database connections not being returned to the pool, perhaps?
- Chuck
THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
MATERIAL and is thus for use only by the intended recipient. If you
received this in error, please contact the sender and delete the e-mail
and its attachments from all computers.
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
