PK97359: HIGH CPU WITH WAS7 IN HASHMAP

6.1.0.4 Download: WebSphere Portal and WCM V6.1.0 fix pack 4 & 6.1.5 fix pack 1
Recommended Updates for WebSphere Portal and Web Content Management V6.1
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

• High CPU and synchronisation issues in collection
  java/util/HashMap.findNonNullKeyEntry. The javacore shows at
  least one thread with the following stack:
  
  at
  java/util/HashMap.findNonNullKeyEntry(HashMap.java:526(Compiled
  Code))
  at java/util/HashMap.putImpl(HashMap.java:622)
  at java/util/HashMap.put(HashMap.java:605(Compiled Code))
  at java/util/HashSet.add(HashSet.java:95(Compiled Code))
  at
  com/ibm/wps/model/te/BidiModelMap.put(BidiModelMap.java:115(Comp
  
  led Code))
  at
  com/ibm/wps/model/te/DynamicAssemblyTreeModelWrapper.getChildren
  
  DynamicAssemblyTreeModelWrapper.java:225(Compiled Code))
  at
  com/ibm/wps/model/navigation/impl/NavigationModelImpl.getChildre
  
  (NavigationModelImpl.java:179(Compiled Code))
  at
  com/ibm/wps/model/wrappers/NavigationModelWrapper.getChildren(Na
  
  igationModelWrapper.java:77(Compiled Code))
  at
  com/ibm/wps/engine/tags/NavigationLoopTag.stack(NavigationLoopTa
  
  .java:331(Compiled Code))
  at
  com/ibm/wps/engine/tags/NavigationLoopTag.doAfterBody(Navigation
  
  oopTag.java:222(Compiled Code))
  at
  com/ibm/_jsp/_Default._jspService(_Default.java:2264(Compiled
  Code))
  at
  com/ibm/ws/jsp/runtime/HttpJspBase.service(HttpJspBase.java:98(C
  
  mpiled Code))
  at
  javax/servlet/http/HttpServlet.service(HttpServlet.java:831(Comp
  
  led Code))
  at
  com/ibm/ws/cache/servlet/ServletWrapper.serviceProxied(ServletWr
  
  pper.java:307(Compiled Code))
  at
  com/ibm/ws/cache/servlet/CacheHook.handleFragment(CacheHook.java
  
  432(Compiled Code))
  :
  

Local fix

Problem summary

• High CPU and synchronisation issues in collection
  java/util/HashMap.findNonNullKeyEntry. The javacore shows at
  least one thread with the following stack:
  
     at
  
  java/util/HashMap.findNonNullKeyEntry(HashMap.java:526(Compiled
  Code))
     at java/util/HashMap.putImpl(HashMap.java:622)
     at java/util/HashMap.put(HashMap.java:605(Compiled Code))
     at java/util/HashSet.add(HashSet.java:95(Compiled Code))
     at
  com/ibm/wps/model/te/BidiModelMap.put(BidiModelMap.java:115(Comp
  ed Code))
     at
  com/ibm/wps/model/te/DynamicAssemblyTreeModelWrapper.getChildren
  ynamicAssemblyTreeModelWrapper.java:225(Compiled Code))
     at
  com/ibm/wps/model/navigation/impl/NavigationModelImpl.getChildre
  NavigationModelImpl.java:179(Compiled Code))
     at
  com/ibm/wps/model/wrappers/NavigationModelWrapper.getChildren(Na
  gationModelWrapper.java:77(Compiled Code))
     at
  com/ibm/wps/engine/tags/NavigationLoopTag.stack(NavigationLoopTa
  .java:331(Compiled Code))
     at
  com/ibm/wps/engine/tags/NavigationLoopTag.doAfterBody(Navigation
  oopTag.java:222(Compiled Code))
     at
  com/ibm/_jsp/_Default._jspService(_Default.java:2264(Compiled
  Code))
     at
  com/ibm/ws/jsp/runtime/HttpJspBase.service(HttpJspBase.java:98(C
  mpiled Code))
     at
  javax/servlet/http/HttpServlet.service(HttpServlet.java:831(Comp
  led Code))
     at
  com/ibm/ws/cache/servlet/ServletWrapper.serviceProxied(ServletWr
  pper.java:307(Compiled Code))
     at
  com/ibm/ws/cache/servlet/CacheHook.handleFragment(CacheHook.java
  432(Compiled Code))
     :
  

Problem conclusion

• Added synchronization for the map.
  
  Manual Steps:
     None
  
  Failing Module(s):
     Engine: Page Assembly
  
  Affected Users:
     All users
  
  Version Information:
      Portal Version(s): 6.1.0.1
       Pre-Requisite(s):
        Co-Requisite(s): ---
  
      Portal Version(s): 6.1.0.2
       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
  ?apar=PK97359&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

• R61A PSY

     UP

• R61B PSY

     UP