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JR48163: Synchronization problems in Url and View registry refresh can lead to JVM deadlock.

Fixes are available

JR48163 - Synchronization problems in Url and View registry refresh can lead to JVM deadlock.
WebSphere Commerce Version 7.0.0.9 Fix Pack
JR53438 - Mandatory cumulative Interim Fix for WebSphere Commerce Version 7 Fix Pack 9

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APAR status

  • Closed as program error.

Error description

  • This fix is to address the problem with the refresh registry
that might sometime lead to a hang

Javacores taken from a JVM experiencing the problem show a
thread executing RegistryManager.refreshAll

3XMTHREADINFO      "WorkManager.broadcast : 0"
J9VMThread:0x00000000B4CB9000, j9thread_t:0x000001001D2322D0,
java/lang/Thread:0x00000000831C4EC8, state:P, prio=5
3XMJAVALTHREAD            (java/lang/Thread getId:0x10F2,
isDaemon:true)
3XMTHREADINFO1            (native thread ID:0x2FA00A9, native
priority:0x5, native policy:UNKNOWN)
3XMTHREADINFO3           Java callstack:
4XESTACKTRACE                at sun/misc/Unsafe.park(Native
Method)
4XESTACKTRACE                at
java/util/concurrent/locks/LockSupport.park(LockSupport.java:182
)
4XESTACKTRACE                at
java/util/concurrent/locks/AbstractQueuedSynchronizer.parkAndChe
ckInterrupt(AbstractQueuedSynchronizer.java:822)
4XESTACKTRACE                at
java/util/concurrent/locks/AbstractQueuedSynchronizer.acquireQue
ued(AbstractQueuedSynchronizer.java:853(Compiled Code))
4XESTACKTRACE                at
java/util/concurrent/locks/AbstractQueuedSynchronizer.acquire(Ab
stractQueuedSynchronizer.java:1189(Compiled Code))
4XESTACKTRACE                at
java/util/concurrent/locks/ReentrantReadWriteLock$WriteLock.lock
(ReentrantReadWriteLock.java:907(Compiled Code))
4XESTACKTRACE                at
com/ibm/commerce/struts/ECActionServlet.refresh(ECActionServlet.
java:381)
4XESTACKTRACE                at
com/ibm/commerce/struts/StrutsRegistrySourceImpl.refresh(StrutsR
egistrySourceImpl.java:80)
4XESTACKTRACE                at
com/ibm/commerce/registry/UrlRegistry.refresh(UrlRegistry.java:1
49)
4XESTACKTRACE                at
com/ibm/commerce/registry/RegistryManager.refreshAll(RegistryMan
ager.java:219)

And most WebContainer threads in Unsafe.park from
ReentrantReadWriteLock$ReadLock.lock

3XMTHREADINFO      "WebContainer : 15"
J9VMThread:0x00000000B1CEB400, j9thread_t:0x000001001D531D10,
java/lang/Thread:0x000000007104E268, state:P, prio=5
3XMJAVALTHREAD            (java/lang/Thread getId:0xD9E,
isDaemon:true)
3XMTHREADINFO1            (native thread ID:0x6F00099, native
priority:0x5, native policy:UNKNOWN)
3XMTHREADINFO3           Java callstack:
4XESTACKTRACE                at sun/misc/Unsafe.park(Native
Method)
4XESTACKTRACE                at
java/util/concurrent/locks/LockSupport.park(LockSupport.java:182
)
4XESTACKTRACE                at
java/util/concurrent/locks/AbstractQueuedSynchronizer.parkAndChe
ckInterrupt(AbstractQueuedSynchronizer.java:822)
4XESTACKTRACE                at
java/util/concurrent/locks/AbstractQueuedSynchronizer.doAcquireS
hared(AbstractQueuedSynchronizer.java:952)
4XESTACKTRACE                at
java/util/concurrent/locks/AbstractQueuedSynchronizer.acquireSha
red(AbstractQueuedSynchronizer.java:1272(Compiled Code))
4XESTACKTRACE                at
java/util/concurrent/locks/ReentrantReadWriteLock$ReadLock.lock(
ReentrantReadWriteLock.java:694(Compiled Code))
4XESTACKTRACE                at
com/ibm/commerce/struts/ECActionServlet.processRequest(ECActionS
ervlet.java:207(Compiled Code))
4XESTACKTRACE                at
com/ibm/commerce/struts/ECActionServlet.doGet(ECActionServlet.ja
va:166(Compiled Code))

Local fix

  • 



Problem summary


    

  • USERS AFFECTED:
 WebSphere Commerce customers who occasionally refresh the Url
or View registries.

 PROBLEM ABSTRACT:
 Synchronization problems in Url and View registry refresh can
lead to JVM deadlock.

 BUSINESS IMPACT:
 The application server can become unresponsive and require
re-starting.

 RECOMMENDATION:

    



Problem conclusion



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    JR48163
    • 

  • Reported component name
    WC BUS EDITION
    • 

  • Reported component ID
    5724I3800
    • 

  • Reported release
    700
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2013-10-22
    • 

  • Closed date
    2014-08-08
    • 

  • Last modified date
    2015-01-08
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Fix information


    

  • Fixed component name
    WC BUS EDITION
    • 

  • Fixed component ID
    5724I3800
    • 



Applicable component levels


    

  • R700  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSYSYL","label":"WebSphere Commerce Enterprise"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Edition":"","Line of Business":{"code":"","label":""}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            08 January 2015
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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