APAR status
Closed as program error.
Error description
When the Out of Memory error occurs and a heapdump is written a memory leak might be seen as following... com.ibm.ejs.j2c.MCWrapper @ 0x7fe3e3468 Unknown \ com.ibm.ws.pmi.server.modules.J2CModule @ 0x611afc690 .\ java.util.Hashtable @ 0x611b00b48 ..\ java.util.Hashtable$Entry[393215] @ 0x78e06b0c8 com.ibm.ws.pmi.server.modules.J2CModule owns this hashtable which contains references to these MQ JMS objects. Because this J2CModule is never cleaned up it will lead to Out of Memory problems.
Local fix
N/A
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM WebSphere Application * * Server using Datasource PMI * **************************************************************** * PROBLEM DESCRIPTION: Out of Memory errors can occur when * * PMI is enabled and interrupted threads * **************************************************************** * RECOMMENDATION: * **************************************************************** The J2CModule can hold on to connection objects references when threads are interrupteed. The following may be in the heap dump. com.ibm.ejs.j2c.MCWrapper @ 0x7fe3e3468 Unknown \ com.ibm.ws.pmi.server.modules.J2CModule @ 0x611afc690 .\ java.util.Hashtable @ 0x611b00b48 ..\ java.util.Hashtable$Entry[393215] @ 0x78e06b0c8
Problem conclusion
When threads are interrupted and PMI is enabled for connections, the main object reference is now set to null. The fix for this APAR is targeted for inclusion in fix pack 8.5.5.18 and 9.0.5.5. For more information, see 'Recommended Updates for WebSphere Application Server': http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
Temporary fix
Comments
APAR Information
APAR number
PH21407
Reported component name
WEBS APP SERV N
Reported component ID
5724H8800
Reported release
900
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2020-01-24
Closed date
2020-04-20
Last modified date
2020-04-20
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":"9.0","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
01 November 2021