[jboss-remoting-issues] [JBoss JIRA] (JBREM-1307) TimedOutputStream OutputTimerTask call to close on SSL OutputStream blocks

[Doug Grove (JIRA)]

Doug Grove created JBREM-1307:
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             Summary: TimedOutputStream OutputTimerTask call to close on SSL OutputStream blocks
                 Key: JBREM-1307
                 URL: https://issues.jboss.org/browse/JBREM-1307
             Project: JBoss Remoting
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: transport
    Affects Versions: 2.2.3.SP2
         Environment: JBoss EAP 4.3.0 CP08 and CP10
            Reporter: Doug Grove


In order to provide a mechanism for timing out a network/socket write operation, the org.jboss.remoting.transport.socket.TimedOutputStream class starts a timer.  If the duration of the write operation exceeds the timer interval, then the timer will call close() on the output stream.  This interrupts the output stream write() operation and causes the write operation to throw an IOException.

When the output stream uses secure sockets (SSL), however, the call to close() on the output stream can block indefinitely.  The threads associated with the write() and close() operation will only clear when the tcp keepalive timeout mechanism in the operation system is invoked.

This appears to be related to a know bug in the java runtime: http://bugs.sun.com/view_bug.do?bug_id=6358629

Specifically, in a thread dump you will see:

"Timer-9" daemon prio=10 tid=0x5016c400 nid=0x2638 waiting on condition [0x4cbad000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <0x585021a0> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:778)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1114)
	at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:186)
	at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:262)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.writeRecord(SSLSocketImpl.java:720)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.sendAlert(SSLSocketImpl.java:1720)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.warning(SSLSocketImpl.java:1564)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.closeInternal(SSLSocketImpl.java:1362)
	- locked <0x58502030> (a com.sun.net.ssl.internal.ssl.SSLSocketImpl)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.close(SSLSocketImpl.java:1301)
	at com.sun.net.ssl.internal.ssl.AppOutputStream.close(AppOutputStream.java:80)
	at org.jboss.remoting.transport.socket.TimedOutputStream.close(TimedOutputStream.java:57)
	at org.jboss.remoting.transport.socket.TimedOutputStream$OutputTimerTask.run(TimedOutputStream.java:145)
	at java.util.TimerThread.mainLoop(Timer.java:512)
	at java.util.TimerThread.run(Timer.java:462)


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