EMA Java API dead lock

ahmire.kailer

EMA Java API version: 3.4.0.1

I don't know how it happened. I use API dispatch. I remember seeing a suggestion about dead lock problem somewhere that using user dispatch would solve the problem, is there another/better workaround?

"pool-14-thread-1" - Thread t@51
   java.lang.Thread.State: WAITING
        at sun.misc.Unsafe.park(Native Method)
        - waiting to lock <19fb84cb> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) owned by "pool-16-thread-1" t@53
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:870)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1199)
        at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:209)
        at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:285)
        at com.thomsonreuters.upa.valueadd.reactor.Reactor.submitChannel(Reactor.java:1985)
        at com.thomsonreuters.upa.valueadd.reactor.WlStream.encodeIntoBufferAndWrite(WlStream.java:748)
        at com.thomsonreuters.upa.valueadd.reactor.WlStream.sendCloseMsg(WlStream.java:793)
        at com.thomsonreuters.upa.valueadd.reactor.WlStream.timeout(WlStream.java:305)
        at com.thomsonreuters.upa.valueadd.reactor.Watchlist.timeout(Watchlist.java:328)
        at com.thomsonreuters.upa.valueadd.reactor.Reactor.processWorkerEvent(Reactor.java:2677)
        at com.thomsonreuters.upa.valueadd.reactor.Reactor.dispatchChannel(Reactor.java:1968)
        at com.thomsonreuters.upa.valueadd.reactor.ReactorChannel.dispatch(ReactorChannel.java:559)
        at com.thomsonreuters.ema.access.OmmBaseImpl.rsslReactorDispatchLoop(OmmBaseImpl.java:1289)
        at com.thomsonreuters.ema.access.OmmBaseImpl.run(OmmBaseImpl.java:1422)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:
        - locked <10ad20cb> (a java.util.concurrent.ThreadPoolExecutor$Worker)

        - locked <3f6430cf> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)

        - locked <75b3318c> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)

"pool-16-thread-1" - Thread t@53
   java.lang.Thread.State: WAITING
        at sun.misc.Unsafe.park(Native Method)
        - waiting to lock <75b3318c> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) owned by "pool-14-thread-1" t@51
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:870)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1199)
        at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:209)
        at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:285)
        at com.thomsonreuters.upa.valueadd.reactor.Reactor.submitChannel(Reactor.java:1985)
        at com.thomsonreuters.upa.valueadd.reactor.WlStream.encodeIntoBufferAndWrite(WlStream.java:748)
        at com.thomsonreuters.upa.valueadd.reactor.WlStream.sendCloseMsg(WlStream.java:793)
        at com.thomsonreuters.upa.valueadd.reactor.WlStream.timeout(WlStream.java:305)
        at com.thomsonreuters.upa.valueadd.reactor.Watchlist.timeout(Watchlist.java:328)
        at com.thomsonreuters.upa.valueadd.reactor.Reactor.processWorkerEvent(Reactor.java:2677)
        at com.thomsonreuters.upa.valueadd.reactor.Reactor.dispatchChannel(Reactor.java:1968)
        at com.thomsonreuters.upa.valueadd.reactor.ReactorChannel.dispatch(ReactorChannel.java:559)
        at com.thomsonreuters.ema.access.OmmBaseImpl.rsslReactorDispatchLoop(OmmBaseImpl.java:1289)
        at com.thomsonreuters.ema.access.OmmBaseImpl.run(OmmBaseImpl.java:1422)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:
        - locked <19fb84cb> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)

        - locked <37e30fd5> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)

        - locked <3e792ce3> (a java.util.concurrent.ThreadPoolExecutor$Worker)

pimchaya.wongrukun01

Hello @ahmire.kailer

I suggest you try to use the latest EMA 3.5.0.0 shipped with Elektron SDK Java version 1.5.0.L1

If the problem still occurs with EMA 3.5.0.0, you can submit the problem to the Elektron SDK development team directly via Refinitiv/Elektron-SDK Github . The team should be able to provide you another workaround or fix the problem.