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Date: Tue, 6 Dec 2005 09:01:09 +0100 (CET)
From: "Trustin Lee (JIRA)" <jira@apache.org>
To: dev@directory.apache.org
Subject: [jira] Resolved: (DIRMINA-138) Deadlock in SSLFilter
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     [ http://issues.apache.org/jira/browse/DIRMINA-138?page=all ]
     
Trustin Lee resolved DIRMINA-138:
---------------------------------

    Fix Version: 0.9
     Resolution: Fixed

It was because of ioLock introduced recently.  I changed BaseIoSession use itself as a lock to resolve this issue.

> Deadlock in SSLFilter
> ---------------------
>
>          Key: DIRMINA-138
>          URL: http://issues.apache.org/jira/browse/DIRMINA-138
>      Project: Directory MINA
>         Type: Bug
>  Environment: Java 5, Linux FC3
>     Reporter: Vinod Panicker
>     Assignee: Trustin Lee
>     Priority: Blocker
>      Fix For: 0.9

>
> Found a deadlock in the SSLFilter implementation.  This has happened quite a few times, even with the latest 0.9 snapshots.
> This deadlock is causing *all* writes to block, effectively bringing the server to a standstill.
> Stack trace of IoThreadPool-1 -  
> Name: IoThreadPool-1
> State: BLOCKED on java.lang.Object@ccbab7 owned by: Thread-20
> Total blocked: 6  Total waited: 27
> Stack trace: 
> org.apache.mina.common.support.BaseIoSession.close(BaseIoSession.java:109)
> com.geodesiconline.mims.io.MIMSIoSession.close(MIMSIoSession.java:56)
> com.geodesiconline.mims.io.LocalIoSession.close(LocalIoSession.java:190)
> com.geodesiconline.mims.io.IoHandlerImpl.sessionClosed(IoHandlerImpl.java:102)
> org.apache.mina.common.support.AbstractIoFilterChain$2.sessionClosed(AbstractIoFilterChain.java:163)
> org.apache.mina.common.support.AbstractIoFilterChain.callNextSessionClosed(AbstractIoFilterChain.java:453)
> org.apache.mina.common.support.AbstractIoFilterChain.access$700(AbstractIoFilterChain.java:52)
> org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.sessionClosed(AbstractIoFilterChain.java:742)
> org.apache.mina.filter.SSLFilter.sessionClosed(SSLFilter.java:376)
> org.apache.mina.common.support.AbstractIoFilterChain.callNextSessionClosed(AbstractIoFilterChain.java:453)
> org.apache.mina.common.support.AbstractIoFilterChain.access$700(AbstractIoFilterChain.java:52)
> org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.sessionClosed(AbstractIoFilterChain.java:742)
> org.apache.mina.filter.ThreadPoolFilter.processEvent(ThreadPoolFilter.java:687)
> org.apache.mina.filter.ThreadPoolFilter$Worker.processEvents(ThreadPoolFilter.java:421)
> org.apache.mina.filter.ThreadPoolFilter$Worker.run(ThreadPoolFilter.java:376)
> Stack trace of Thread-20 - 
> Name: Thread-20
> State: BLOCKED on org.apache.mina.transport.socket.nio.support.SocketSessionImpl@bebb88 owned by: IoThreadPool-1
> Total blocked: 5  Total waited: 5
> Stack trace: 
> org.apache.mina.filter.SSLFilter.filterWrite(SSLFilter.java:493)
> org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:556)
> org.apache.mina.common.support.AbstractIoFilterChain.access$1200(AbstractIoFilterChain.java:52)
> org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.filterWrite(AbstractIoFilterChain.java:773)
> org.apache.mina.common.support.AbstractIoFilterChain$2.filterWrite(AbstractIoFilterChain.java:213)
> org.apache.mina.common.support.AbstractIoFilterChain.callPreviousFilterWrite(AbstractIoFilterChain.java:556)
> org.apache.mina.common.support.AbstractIoFilterChain.filterWrite(AbstractIoFilterChain.java:547)
> org.apache.mina.transport.socket.nio.support.SocketSessionImpl.write0(SocketSessionImpl.java:131)
> org.apache.mina.common.support.BaseIoSession.write(BaseIoSession.java:143)
> com.geodesiconline.mims.io.MIMSIoSession.write(MIMSIoSession.java:127)
> com.geodesiconline.mims.io.LocalIoSession.write(LocalIoSession.java:133)
> com.geodesiconline.mims.protocol.xmpp.handler.AbstractHandler.writeStreamError(AbstractHandler.java:306)
> com.geodesiconline.mims.protocol.xmpp.handler.AbstractHandler.retrieveAndSetActiveDefaultListItems(AbstractHandler.java:1522)
> com.geodesiconline.mims.protocol.xmpp.handler.AbstractHandler.isStanzaBlocked(AbstractHandler.java:828)
> com.geodesiconline.mims.protocol.xmpp.handler.AsynchronousStanzaHandler.writePresence(AsynchronousStanzaHandler.java:432)
> com.geodesiconline.mims.protocol.xmpp.handler.CommonPresence.sendPresence(CommonPresence.java:170)
> com.geodesiconline.mims.protocol.xmpp.handler.PresenceBroadcastHandler.broadcastPresenceContact(PresenceBroadcastHandler.java:237)
> com.geodesiconline.mims.protocol.xmpp.handler.PresenceBroadcastHandler.processOutboundStanza(PresenceBroadcastHandler.java:71)
> com.geodesiconline.mims.protocol.xmpp.handler.AsynchronousStanzaHandler.processStanza(AsynchronousStanzaHandler.java:320)
> com.geodesiconline.mims.protocol.xmpp.handler.InitialPresenceHandler.sendInitialPresence(InitialPresenceHandler.java:140)
> com.geodesiconline.mims.protocol.xmpp.handler.InitialPresenceHandler.processOutboundStanza(InitialPresenceHandler.java:89)
> com.geodesiconline.mims.protocol.xmpp.handler.AsynchronousStanzaHandler.processStanza(AsynchronousStanzaHandler.java:320)
> com.geodesiconline.mims.protocol.xmpp.handler.PresenceHandler.processStanza(PresenceHandler.java:225)
> com.geodesiconline.mims.protocol.xmpp.handler.AbstractHandler.handleStanza(AbstractHandler.java:195)
> com.geodesiconline.mims.protocol.xmpp.io.XMPPIoHandler.processData(XMPPIoHandler.java:464)
> com.geodesiconline.mims.protocol.xmpp.io.XMPPIoHandler.messageReceived(XMPPIoHandler.java:180)
> com.geodesiconline.mims.protocol.xmpp.io.XMPPIoHandler.notified(XMPPIoHandler.java:660)
> com.geodesiconline.mims.event.EventManager$1.run(EventManager.java:196)
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
> java.lang.Thread.run(Thread.java:595)
> All the other threads are queued up behind Thread-20

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