hi Jaspal, the problem seems to be in the com.valleyoak package.
The main thread is stuck at
at com.valleyoak.model.Payment.<clinit>(Payment.java:136)
(at com.valleyoak.util.IVosTableInfo.findColumnTables(IVosTableInfo.java:161)) - last line
the cluster thread is stuck at
at java.lang.Class.forName0(Native Method)
because the main thread is stuck during a <clinit> (this is class init, happens
directly after class loading, to do static initializers), the cluster thread can't
continue.
what you need to investigate is why
at com.valleyoak.util.IVosTableInfo.findColumnTables(IVosTableInfo.java:161)) -
last line
is stuck, but it does look like its a problem with your code.
Filip
jsandhu2204 wrote:
HI Filip:
I did three dumps. It is hanging on the same class. Please let me know any
ideas...
We are in production. I have same setup on development and it works.
However, cluster setup on development is on the same box with apache web
server in front.
In production there are three servers with hardware load balancer in the the
front.
Thanks
Jaspal
jsandhu2204 wrote:
Please see the three stack dumps I did.
http://www.nabble.com/file/p21367357/Thread-dump-three-times.txt
Thread-dump-three-times.txt
Filip Hanik - Dev Lists wrote:
Could you take more than one thread dump, take 3, wait 5 seconds between
each.
As you can see, the startup thread is still executing your application
code com.valleyoak.util.IVosTableInfo, this is the thread that starts up
tomcat
Filip
main thread - the one starting tomcat
"main" prio=6 tid=0x0000000001dc1c00 nid=0x15cc in Object.wait()
[0x0000000001f4d000..0x0000000001f4fc70]
java.lang.Thread.State: RUNNABLE
at
com.valleyoak.util.IVosTableInfo.findColumnTables(IVosTableInfo.java:161)
at com.valleyoak.db.IVosStorable.findColumnTables(IVosStorable.java:1245)
at com.valleyoak.model.Payment.<clinit>(Payment.java:136)
at
com.valleyoak.model.ContextListener.contextInitialized(ContextListener.java:107)
at
org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3843)
at
org.apache.catalina.core.StandardContext.start(StandardContext.java:4342)
- locked <0x0000000041f4f390> (a
org.apache.catalina.core.StandardContext)
at
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
- locked <0x0000000041eef8b8> (a java.util.HashMap)
at
org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
at
org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:926)
at
org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:889)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
One of the cluster threads have received the session state data from the
other node and is deserializing it
"pool-2-thread-1" prio=6 tid=0x0000000001dc5c00 nid=0xf00 in
Object.wait() [0x00000000777c000..0x000000000777fae0]
java.lang.Thread.State: RUNNABLE
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at com.valleyoak.util.IVosTableInfo.class$(IVosTableInfo.java:504)
at com.valleyoak.util.IVosTableInfo.loadTables(IVosTableInfo.java:522)
at com.valleyoak.util.IVosTableInfo.<clinit>(IVosTableInfo.java:53)
at com.valleyoak.db.IVosStorable.findColumnTables(IVosStorable.java:1245)
at com.valleyoak.model.User.<clinit>(User.java:71)
at java.io.ObjectStreamClass.hasStaticInitializer(Native Method)
at
java.io.ObjectStreamClass.computeDefaultSUID(ObjectStreamClass.java:1696)
at java.io.ObjectStreamClass.access$100(ObjectStreamClass.java:52)
at java.io.ObjectStreamClass$1.run(ObjectStreamClass.java:205)
at java.security.AccessController.doPrivileged(Native Method)
at
java.io.ObjectStreamClass.getSerialVersionUID(ObjectStreamClass.java:202)
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:558)
at
java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1583)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732)
jsandhu2204 wrote:
I have created stack trace when servers hangs. Please see attached. I
would
appreciate if you can help me with this.
If I put <distributable/> flag in the web.xml of the application.
Tomcat6
does not start sometimes. It simply hangs.
http://www.nabble.com/file/p21347289/CheatSheet-ltr1vs02-Tomcat6-hangs-if-put-distributeable-tag.rtf
CheatSheet-ltr1vs02-Tomcat6-hangs-if-put-distributeable-tag.rtf
http://www.nabble.com/file/p21347289/CheatSheet-Tomcat6-hangs-if-put-distributeable-tag.rtf
CheatSheet-Tomcat6-hangs-if-put-distributeable-tag.rtf
Filip Hanik - Dev Lists wrote:
When this happens, simply take a thread dump, and we can see why it is
hanging
Unix:
kill -3 <pid>
jstack -l <pid>
Windows
Ctrl+Break in the console
jstack -l <pid>
Filip
jsandhu2204 wrote:
Problem1 : While starting tomcat6, sometimes it starts other times it
simply
hangs on the following message:
INFO: Manager [localhost#/ivos]; session state send at 12/12/08 12:34
AM
received in 110 ms.
Tomcat Log:
INFO: Register manager /ivos to cluster element Engine with name
Catalina
Dec 12, 2008 12:34:53 AM org.apache.catalina.ha.session.DeltaManager
start
INFO: Starting clustering manager at /ivos Dec 12, 2008 12:34:53 AM
org.apache.catalina.ha.session.DeltaManager getAllClusterSessions
WARNING: Manager [localhost#/ivos], requesting session state from
org.apache.catalina.tribes.membership.MemberImpl[tcp://{10, 88, 8,
28}:4002,{10, 88, 8, 28},4002, alive=123501,id={27 -68 111 -64 -49
-117
68
38 -98 -27 -49 39 -22 6 -88 -38 }, payload={}, command={}, domain={},
].
This operation will timeout if no session state has been received
within
60
seconds.
Dec 12, 2008 12:34:53 AM org.apache.catalina.ha.session.DeltaManager
waitForSendAllSessions
INFO: Manager [localhost#/ivos]; session state send at 12/12/08 12:34
AM
received in 110 ms.
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