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From "Christian Schwarz (JIRA)" <j...@apache.org>
Subject [jira] Created: (DIRMINA-813) Starvation occures sometimes on SerialSession#close()
Date Wed, 01 Dec 2010 15:08:12 GMT
Starvation occures sometimes on SerialSession#close() 
------------------------------------------------------

                 Key: DIRMINA-813
                 URL: https://issues.apache.org/jira/browse/DIRMINA-813
             Project: MINA
          Issue Type: Bug
          Components: Transport
    Affects Versions: 2.0.0
         Environment: OS: Win32 XP-Pro 
rxtx Version :2.1.7.4_v20071016  
            Reporter: Christian Schwarz


It seems that an Starvation occures sometimes when we call close() on a SerialSession, the
Methode never returns. 
We observed our Application with JConsole, it shows that no Deadlocks are detectable, so we
assume that we have a starvation here.

Here are the Stack traces of 2 involved Threads :
---------------------------------------------------------------------------------------------------
Name: Thread-17
State: RUNNABLE
Total blocked: 0  Total waited: 0

Stack trace: 
gnu.io.RXTXPort.eventLoop(Native Method)
gnu.io.RXTXPort$MonitorThread.run(RXTXPort.java:1575)
---------------------------------------------------------------------------------------------------

Name: Worker-6
State: TIMED_WAITING
Total blocked: 32.336  Total waited: 2.860

Stack trace: 
java.lang.Thread.sleep(Native Method)
gnu.io.RXTXPort.close(RXTXPort.java:1025)
   - locked gnu.io.RXTXPort@16ba7f9
org.apache.mina.transport.serial.SerialSessionImpl$SerialIoProcessor.remove(SerialSessionImpl.java:302)
org.apache.mina.transport.serial.SerialSessionImpl$SerialIoProcessor.remove(SerialSessionImpl.java:1)
org.apache.mina.core.filterchain.DefaultIoFilterChain$HeadFilter.filterClose(DefaultIoFilterChain.java:634)
org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterClose(DefaultIoFilterChain.java:525)
org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1500(DefaultIoFilterChain.java:46)
org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.filterClose(DefaultIoFilterChain.java:813)
org.apache.mina.core.filterchain.IoFilterAdapter.filterClose(IoFilterAdapter.java:143)
org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterClose(DefaultIoFilterChain.java:525)
org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1500(DefaultIoFilterChain.java:46)
org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.filterClose(DefaultIoFilterChain.java:813)
org.apache.mina.core.filterchain.IoFilterAdapter.filterClose(IoFilterAdapter.java:143)
org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterClose(DefaultIoFilterChain.java:525)
org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1500(DefaultIoFilterChain.java:46)
org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.filterClose(DefaultIoFilterChain.java:813)
org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.filterClose(DefaultIoFilterChain.java:740)
org.apache.mina.core.filterchain.DefaultIoFilterChain.callPreviousFilterClose(DefaultIoFilterChain.java:525)
org.apache.mina.core.filterchain.DefaultIoFilterChain.fireFilterClose(DefaultIoFilterChain.java:518)
org.apache.mina.core.session.AbstractIoSession.close(AbstractIoSession.java:272)
org.apache.mina.core.session.AbstractIoSession.close(AbstractIoSession.java:254)


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