IBM Support

PH36354: DEADLOCK IN LOGGING CODE

Subscribe to this APAR

By subscribing, you receive periodic emails alerting you to the status of the APAR, along with a link to the fix after it becomes available. You can track this item individually or track all items by product.

Notify me when this APAR changes.

Notify me when an APAR for this component changes.

 

APAR status

  • Closed as program error.

Error description

  • Deadlock in these threads:

"NotificationServiceDispatcher : 43"
Blocked on: com/ibm/ws/logging/hpel/FormatSet
Owned by: "WebContainer : 5"
Java callstack:
at
com/ibm/ws/logging/hpel/FormatSet.returnFormatSet(FormatSet.java
:106(Compiled Code))
(entered lock:
com/ibm/ws/logging/hpel/FormatSet, entry
count: 1)
at
com/ibm/ws/logging/TraceLogFormatter.formatTimeAndThread(TraceLo
gFormatter.java:370(Compiled Code))
at
com/ibm/ws/logging/TraceLogFormatter.formatHeaderBasic(TraceLogF
ormatter.java:471(Compiled Code))
at
com/ibm/ws/logging/TraceLogFormatter.formatBasic(TraceLogFormatt
er.java:202(Compiled Code))
at
com/ibm/ejs/ras/TraceLogger.doLog(TraceLogger.java:365(Compiled
Code))
at
com/ibm/ejs/ras/TraceLogger.processEvent(TraceLogger.java:354(Co
mpiled Code))
at
com/ibm/ws/logging/WsHandlerWrapper.publish(WsHandlerWrapper.jav
a:48(Compiled Code))
...


"WebContainer : 5"
Blocked on:
org/apache/logging/log4j/core/appender/OutputStreamManager
Owned by: "NotificationServiceDispatcher : 43"
Java callstack:
at
org/apache/logging/log4j/core/appender/OutputStreamManager.write
Bytes(OutputStreamManager.java:359(Compiled Code))
at
org/apache/logging/log4j/core/layout/TextEncoderHelper.writeEnco
dedText(TextEncoderHelper.java:96(Compiled Code))
at
org/apache/logging/log4j/core/layout/TextEncoderHelper.encodeTex
t(TextEncoderHelper.java:65(Compiled Code))
at
org/apache/logging/log4j/core/layout/StringBuilderEncoder.encode
(StringBuilderEncoder.java:68(Compiled Code))
at
org/apache/logging/log4j/core/layout/StringBuilderEncoder.encode
(StringBuilderEncoder.java:32(Compiled Code))
at
org/apache/logging/log4j/core/layout/PatternLayout.encode(Patter
nLayout.java:227(Compiled Code))
...

Local fix

  • NA

Problem summary

  • ****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server                                      *
****************************************************************
* PROBLEM DESCRIPTION: Deadlock in logging code between        *
*                      OutputStreamManager and FormatSet       *
*                      objects.                                *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When logging frameworks such as Log4j is configured and
applications are logging messages and the WebSphere Application
Server Logging framework tries to log a message, a deadlock
might occur between the following
NotificationServiceDispatcher and WebContainer threads:
Thread Stack:
"NotificationServiceDispatcher : 43"
J9VMThread:, omrthread_t:,
java/lang/Thread:, state:B, prio=5
Blocked on: com/ibm/ws/logging/hpel/FormatSet
Owned by: "WebContainer : 5"
Java callstack:
at
com/ibm/ws/logging/hpel/FormatSet.returnFormatSet(FormatSet.java
:106(Compiled Code))
(entered lock:
com/ibm/ws/logging/hpel/FormatSet, entry
count: 1)
at
com/ibm/ws/logging/TraceLogFormatter.formatTimeAndThread(TraceLo
gFormatter.java:370(Compiled Code))
at
com/ibm/ws/logging/TraceLogFormatter.formatHeaderBasic(TraceLogF
ormatter.java:471(Compiled Code))
at
com/ibm/ws/logging/TraceLogFormatter.formatBasic(TraceLogFormatt
er.java:202(Compiled Code))
at
com/ibm/ejs/ras/TraceLogger.doLog(TraceLogger.java:365(Compiled
Code))
at
com/ibm/ejs/ras/TraceLogger.processEvent(TraceLogger.java:354(Co
mpiled Code))
at
com/ibm/ws/logging/WsHandlerWrapper.publish(WsHandlerWrapper.jav
a:48(Compiled Code))
...
"WebContainer : 5",
omrthread_t:,
java/lang/Thread:, state:B, prio=5
Blocked on:
org/apache/logging/log4j/core/appender/OutputStreamManager
Owned by: "NotificationServiceDispatcher : 43"
Java callstack:
at
org/apache/logging/log4j/core/appender/OutputStreamManager.write
Bytes(OutputStreamManager.java:359(Compiled Code))
at
org/apache/logging/log4j/core/layout/TextEncoderHelper.writeEnco
dedText(TextEncoderHelper.java:96(Compiled Code))
at
org/apache/logging/log4j/core/layout/TextEncoderHelper.encodeTex
t(TextEncoderHelper.java:65(Compiled Code))
at
org/apache/logging/log4j/core/layout/StringBuilderEncoder.encode
(StringBuilderEncoder.java:68(Compiled Code))
at
org/apache/logging/log4j/core/layout/StringBuilderEncoder.encode
(StringBuilderEncoder.java:32(Compiled Code))
at
org/apache/logging/log4j/core/layout/PatternLayout.encode(Patter
nLayout.java:227(Compiled Code))
...

Problem conclusion

  • The code was resolved to fix the deadlock.

The fix for this APAR is targeted for inclusion in fix pack
8.5.5.21 and 9.0.5.10. For more information, see 'Recommended

Updates for WebSphere Application Server':
https://www.ibm.com/support/pages/node/715553

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    PH36354
    • 

  • Reported component name
    WEBS APP SERV N
    • 

  • Reported component ID
    5724H8800
    • 

  • Reported release
    850
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2021-04-16
    • 

  • Closed date
    2021-06-15
    • 

  • Last modified date
    2021-09-09
    • 





    

  • 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
    WEBS APP SERV N
    • 

  • Fixed component ID
    5724H8800
    • 



Applicable component levels


    

  • R850  PSY
       UP
    • 

  • R900  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.5","Line of Business":{"code":"LOB45","label":"Automation"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            02 November 2021
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
Page Feedback