APAR status
Closed as program error.
Error description
When creating several thousands unique JAX-WS Webservice clients JAXBUtils may grow in memory utilization, heap dump look similar to following The class "org.apache.axis2.jaxws.message.databinding.JAXBUtils", loaded by "<system class loader>", occupies 449,094,008 (40.69%) bytes. The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Node[]" loaded by "<system class loader>".
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: IBM WebSphere Application Server users of * * JAX-WS Web Services * **************************************************************** * PROBLEM DESCRIPTION: Axis2 JAXBUtils class consuming large * * amount of memory * **************************************************************** * RECOMMENDATION: * **************************************************************** In certain Web services scenarios, memory analyzer tool shows large amount of memory being consumed by the Axis2 class: org.apache.axis2.jaxws.message.databinding.JAXBUtils. Memory Analyzer displays message like this: The class "org.apache.axis2.jaxws.message.databinding.JAXBUtils", loaded by "org.apache.axis2", occupies 448,797,791 (38.08%) bytes. The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Node[]" loaded by "com.ibm.oti.vm.BootstrapClassLoader
Problem conclusion
The memory leak in Axis2 JAXBUtils class occurred because in certain Web services scenarios, a large number of different JAXB contexts were created and cached in memory in a short period of time, which did not provide enough time for Garbage Collector to run and cleanup unused JAXBContext cache entries. The Web services code was modified to limit the number of JAXB contexts that are stored in the cache if the JVM property: jaxws.JAXBContext.reduceHashMapMemory is set to true. The fix for this APAR is targeted for inclusion in fix packs 8.5.5.19 and 9.0.5.6. For more information, see 'Recommended Updates for WebSphere Application Server': https://www.ibm.com/support/pages/node/715553
Temporary fix
Comments
APAR Information
APAR number
PH26778
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
2020-06-24
Closed date
2020-11-03
Last modified date
2020-11-03
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":"8.5","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
02 November 2021