Fixes are available
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21
APAR status
Closed as program error.
Error description
Reported scenario where system experiences severe slowdown with many threads contending with similar call stacks: at java/util/Hashtable.get(Hashtable.java:502(Compiled Code)) at java/lang/Class.lookupCachedMethods(Class.java:3068(Compiled Code)) at java/lang/Class.getDeclaredMethods(Class.java:909(Compiled Code)) at javax/enterprise/util/AnnotationLiteral.run (AnnotationLiteral.java:274(Compiled Code)) at java/security/AccessController.doPrivileged (AccessController.java:364(Compiled Code)) at javax/enterprise/util/AnnotationLiteral.hashCode (AnnotationLiteral.java:271(Compiled Code)) at java/util/HashMap.hash(HashMap.java:374(Compiled Code)) at java/util/HashMap.getEntry(HashMap.java:474(Compiled Code)) at java/util/HashMap.containsKey(HashMap.java:461(Compiled Code)) at java/util/HashSet.contains(HashSet.java:213(Compiled Code)) at java/util/AbstractCollection.containsAll (AbstractCollection.java:328(Compiled Code)) at java/util/AbstractSet.equals(AbstractSet.java:107(Compiled Code)) at org/apache/webbeans/component/AbstractOwbBean.equals (AbstractOwbBean.java:760(Compiled Code)) at java/util/concurrent/ConcurrentHashMapSegment.containsKey (ConcurrentHashMap.java:460(Compiled Code)) at java/util/concurrent/ConcurrentHashMap.containsKey (ConcurrentHashMap.java:905(Compiled Code)) at org/apache/webbeans/context/AbstractContext.getCreationalContext (AbstractContext.java:240(Compiled Code)) at org/apache/webbeans/intercept/NormalScopedBeanInterceptorHandler . getContextualCreationalContext (NormalScopedBeanInterceptorHandler.java:154(Compiled Code)) at org/apache/webbeans/intercept/NormalScopedBeanInterceptorHandler . invoke(NormalScopedBeanInterceptorHandler.java:98(Compiled Code))
Local fix
None identified
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM WebSphere Application * * Server * * using Context Dependency Injection (CDI) * **************************************************************** * PROBLEM DESCRIPTION: Severe system slowdown due to many * * threads contending on calls to * * Class.lookupCachedMethods() from CDI. * **************************************************************** * RECOMMENDATION: * **************************************************************** System experiences severe slowdown with many threads contending with similar call stacks: at java/util/Hashtable.get(Hashtable.java:502(Compiled Code)) at java/lang/Class.lookupCachedMethods(Class.java:3068(Compiled Code)) at java/lang/Class.getDeclaredMethods(Class.java:909(Compiled Code)) at javax/enterprise/util/AnnotationLiteral.run (AnnotationLiteral.java:274(Compiled Code)) at java/security/AccessController.doPrivileged (AccessController.java:364(Compiled Code)) at javax/enterprise/util/AnnotationLiteral.hashCode (AnnotationLiteral.java:271(Compiled Code)) at java/util/HashMap.hash(HashMap.java:374(Compiled Code)) at java/util/HashMap.getEntry(HashMap.java:474(Compiled Code)) at java/util/HashMap.containsKey(HashMap.java:461(Compiled Code)) at java/util/HashSet.contains(HashSet.java:213(Compiled Code)) at java/util/AbstractCollection.containsAll (AbstractCollection.java:328(Compiled Code)) at java/util/AbstractSet.equals(AbstractSet.java:107(Compiled Code)) at org/apache/webbeans/component/AbstractOwbBean.equals (AbstractOwbBean.java:760(Compiled Code)) at java/util/concurrent/ConcurrentHashMapSegment.containsKey (ConcurrentHashMap.java:460(Compiled Code)) at java/util/concurrent/ConcurrentHashMap.containsKey (ConcurrentHashMap.java:905(Compiled Code)) at org/apache/webbeans/context/AbstractContext.getCreationalContext (AbstractContext.java:240(Compiled Code)) at org/apache/webbeans/intercept/NormalScopedBeanInterceptorHandler . getContextualCreationalContext (NormalScopedBeanInterceptorHandler.java:154(Compiled Code)) at org/apache/webbeans/intercept/NormalScopedBeanInterceptorHandler . invoke(NormalScopedBeanInterceptorHandler.java:98(Compiled Code))
Problem conclusion
Optimizations in comparison ordering in org.apache.webbeans.component.AbstractOwbBean.equals reduces the average cost of the equals() calculation, and optimizations in org.apache.webbeans.context.AbstractContext reduces the frequency that equals is called. The fix for this APAR is currently targeted for inclusion in fix packs 8.5.5.9 and 8.0.0.13. Please refer to the Recommended Updates page for delivery information: http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
Temporary fix
Comments
APAR Information
APAR number
PI51508
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
2015-10-29
Closed date
2016-02-11
Last modified date
2016-02-11
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
R800 PSY
UP
R850 PSY
UP
Document Information
Modified date:
28 April 2022