APAR status
Closed as program error.
Error description
When using WebSphere Portal on WAS 7 in a high load situation, threads start hanging in java.util.HashMap.findNonNullKeyEntry(). The javacore shows at least one thread with the following stack: 3XMTHREADINFO "WebContainer : 0" TID:0x38398100, j9thread_t:0x34B4AA9C, state:CW, prio=5 3XMTHREADINFO1 (native thread ID:0x1B6099, native priority:0x5, native policy:UNKNOWN) 4XESTACKTRACE at java/util/HashMap.findNonNullKeyEntry(Bytecode PC:56(Compiled Code)) 4XESTACKTRACE at java/util/LinkedHashMap.get(Bytecode PC:37(Compiled Code)) 4XESTACKTRACE at com/ibm/wps/state/utils/cache/CacheOnMap.get(CacheOnMap.java:75( ompiled Code)) 4XESTACKTRACE at com/ibm/wps/state/utils/cache/ConstructingCache.get(Constructing ache.java:108(Compiled Code)) 4XESTACKTRACE at com/ibm/wps/state/keymanager/caching/LRUGroupCacheImpl.getObject (LRUGroupCacheImpl.java:407(Compiled Code)) 4XESTACKTRACE at com/ibm/wps/state/keymanager/KeyManagerImpl.reset(KeyManagerImpl java:108(Compiled Code))
Local fix
Problem summary
When using WebSphere Portal on WAS 7 in a high load situation, threads start hanging in java.util.HashMap.findNonNullKeyEntry(). The javacore shows at least one thread with the following stack: 3XMTHREADINFO "WebContainer : 0" TID:0x38398100, j9thread_t:0x34B4AA9C, state:CW, prio=5 3XMTHREADINFO1 (native thread ID:0x1B6099, native priority:0x5, native policy:UNKNOWN) 4XESTACKTRACE at java/util/HashMap.findNonNullKeyEntry(Bytecode PC:56(Compiled Code)) 4XESTACKTRACE at java/util/LinkedHashMap.get(Bytecode PC:37(Compiled Code)) 4XESTACKTRACE at com/ibm/wps/state/utils/cache/CacheOnMap.get(CacheOnMap.java:75( Compiled Code)) 4XESTACKTRACE at com/ibm/wps/state/utils/cache/ConstructingCache.get(Constructing ache.java:108(Compiled Code)) 4XESTACKTRACE at com/ibm/wps/state/keymanager/caching/LRUGroupCacheImpl.getObject (LRUGroupCacheImpl.java:407(Compiled Code)) 4XESTACKTRACE at com/ibm/wps/state/keymanager/KeyManagerImpl.reset(KeyManagerImpl java:108(Compiled Code))
Problem conclusion
By synchronizing the key manager, this code has now become thread-safe. Manual Steps: None Failing Module(s): Engine: State handling 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 r?apar=PM02025&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 number
PM02025
Reported component name
WEBSPHERE PORTA
Reported component ID
5724E7600
Reported release
61A
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2009-11-25
Closed date
2009-12-22
Last modified date
2009-12-22
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
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSHRKX","label":"WebSphere Portal"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.1.0.1","Line of Business":{"code":"LOB31","label":"WCE Watson Marketing and Commerce"}}]
Document Information
Modified date:
20 December 2021