APAR status
Closed as program error.
Error description
When dsserver is started using java 8 SR6 FP15, the java process will crash. Java crash dump will show ibmlb2jni at the top of the stack. The load balancer's server.log will have "Advisor interface = [some ip address]" as the last line logged.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: IBM WebSphere Application Server Load * * Balancer users * **************************************************************** * PROBLEM DESCRIPTION: If running the Load Balancer for IPv4 * * and IPv6 on Microsoft Windows, * * dsserver will crash with java * * 8.0.6.15 or higher. * **************************************************************** * RECOMMENDATION: * **************************************************************** The load balancer crashes when started with java 8.0.6.15 or higher. Symptoms: -Load balancer processes, dscontrol and lbadmin, will not be able to connect to dsserver. -An application event (id 1000) will be reported in Windows Event Log indicating faulting appication java.exe, faulting module ibmlb2jni.dll. -If configured to save application cores, java.exe.<pid>.dmp will be created. -The Load Balancer server.log will not show any statements after logging the advisor interface ip address.
Problem conclusion
Java's memory module was improved in 8.0.6.15. The Load Balancer java native interface (jni) code was casting variables incorrectly. With the enhanced memory model, the incorrect cast causes a memory access violation and crashes the java virtual machine. Fix levels: 8.5.5.19 9.0.5.6 NOTE - The Load Balancer incorporates java with version 8.5 and does not distribute the java/jni combination required to experience this problem. Java will be upgraded in conjunction with the load balancer jni corrections in 8.5.5.19.
Temporary fix
9.0 users use java level 8.0.6.11 or earlier.
Comments
APAR Information
APAR number
PH29211
Reported component name
WS EDGE LB IPV4
Reported component ID
5724H8812
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2020-09-08
Closed date
2020-09-23
Last modified date
2020-09-23
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
WS EDGE LB IPV4
Fixed component ID
5724H8812
Applicable component levels
[{"Line of Business":{"code":"LOB45","label":"Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.5"}]
Document Information
Modified date:
24 September 2020