PK73368: CACHE SYNCHRONIZATION ISSUES

6.1.0.1 Download: WebSphere Portal and Web Content Management V6.1, fix pack 1
6.1.0.2 Download: WebSphere Portal and Web Content Management V6.1, fix pack 2
6.1.0.3 Download: WebSphere Portal and WCM V6.1 fix pack 3, 6.1.5 feature pack
6.1.0.4 Download: WebSphere Portal and WCM V6.1.0 fix pack 4 & 6.1.5 fix pack 1
6.1.0.5 Download: WebSphere Portal and WCM V6.1.0 fix pack 5
6.1.0.6 Download: WebSphere Portal and WCM V6.1.0 fix pack 6

APAR status

• Closed as program error.

Error description

• Deadlocks can occur in the CacheOnRequest class:
  
  "WebContainer : 19" daemon prio=10 tid=0x00000001088dc0e0
  nid=0x2f7 runnable [0xfffffffe7bbf5000..0xfffffffe7bbff628]
  at
  com.ibm.wps.state.utils.cache.CacheOnRequest.getCache(CacheOnReq
  
  est.java:219)
  - waiting to lock <0xffffffff4908a0a8> (a java.lang.Class)
  at
  com.ibm.wps.state.utils.cache.CacheOnRequest.getCache(CacheOnReq
  
  est.java:369)
  at
  com.ibm.wps.state.utils.cache.CacheOnRequest.getCache(CacheOnReq
  
  est.java:353)
  at
  com.ibm.wps.state.utils.cache.CacheOnRequest.get(CacheOnRequest.
  
  ava:133)
  at
  com.ibm.wps.state.accessors.action.manager.ActionIdHandlerFactor
  
  Impl.getActionIdHandler(ActionIdHandlerFactoryImpl.java:105)
  
  "WebContainer : 41" daemon prio=10 tid=0x0000000108c49670
  nid=0x43f runnable [0xfffffffe77ef4000..0xfffffffe77eff628]
  at
  com.ibm.wps.state.utils.cache.CacheOnRequest.getCache(CacheOnReq
  
  est.java:219)
  - waiting to lock <0xffffffff4908a0a8> (a java.lang.Class)
  at
  com.ibm.wps.state.utils.cache.CacheOnRequest.getCache(CacheOnReq
  
  est.java:369)
  at
  com.ibm.wps.state.utils.cache.CacheOnRequest.get(CacheOnRequest.
  
  ava:151)
  at
  com.ibm.wps.state.outputmediators.OutputMediatorFactoryProxy.get
  
  utputMediator(OutputMediatorFactoryProxy.java:207)
  at
  com.ibm.wps.state.accessors.url.UrlEncodingAccessorImpl$UrlEncod
  
  ngStrategyContext.getOutputMediator(UrlEncodingAccessorImpl.java
  
  221)
  

Local fix

Problem summary

• Deadlocks can occur in the CacheOnRequest class:
  
     "WebContainer : 19" daemon prio=10 tid=0x00000001088dc0e0
     nid=0x2f7 runnable [0xfffffffe7bbf5000..0xfffffffe7bbff628]
     at
  
  com.ibm.wps.state.utils.cache.CacheOnRequest.getCache(CacheOnReq
     est.java:219)
     - waiting to lock <0xffffffff4908a0a8> (a java.lang.Class)
     at
  
  com.ibm.wps.state.utils.cache.CacheOnRequest.getCache(CacheOnReq
     est.java:369)
     at
  
  com.ibm.wps.state.utils.cache.CacheOnRequest.getCache(CacheOnReq
     est.java:353)
     at
  
  com.ibm.wps.state.utils.cache.CacheOnRequest.get(CacheOnRequest.
     ava:133)
     at
  
  com.ibm.wps.state.accessors.action.manager.ActionIdHandlerFactor
     Impl.getActionIdHandler(ActionIdHandlerFactoryImpl.java:105)
  
     "WebContainer : 41" daemon prio=10 tid=0x0000000108c49670
     nid=0x43f runnable [0xfffffffe77ef4000..0xfffffffe77eff628]
     at
  
  com.ibm.wps.state.utils.cache.CacheOnRequest.getCache(CacheOnReq
     est.java:219)
     - waiting to lock <0xffffffff4908a0a8> (a java.lang.Class)
     at
  
  com.ibm.wps.state.utils.cache.CacheOnRequest.getCache(CacheOnReq
     est.java:369)
     at
  
  com.ibm.wps.state.utils.cache.CacheOnRequest.get(CacheOnRequest.
     ava:151)
     at
  
  com.ibm.wps.state.outputmediators.OutputMediatorFactoryProxy.get
     utputMediator(OutputMediatorFactoryProxy.java:207)
     at
  
  com.ibm.wps.state.accessors.url.UrlEncodingAccessorImpl$UrlEncod
  
  ngStrategyContext.getOutputMediator(UrlEncodingAccessorImpl.java
     221)
  

Problem conclusion

• Made a static method non-static to resolve the deadlock.
  
  Failing Module(s):
     Engine: State handling
  
  Affected Users:
     All users
  
  Version Information:
      Portal Version(s): 6.1.0.0
       Pre-Requisite(s):
        Co-Requisite(s): ---
  
  Platform Specific:
     This fix applies to all platforms.
  
  A fix is available from Fix Central:
  
  http://www.ibm.com/eserver/support/fixes/fixcentral/swgquickorde
  r?apar=PK73368&productid=WebSphere%20Portal&brandid=5
  
  You may need to type or paste the complete address into your Web
  browser.
  

Temporary fix

Comments

APAR Information

• 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

  WEBSPHERE PORTA

• Fixed component ID

  5724E7600

Applicable component levels

• R610 PSY

     UP