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Resolving and preventing violation of the number of min/max instances of dynamic cluster in the WebSphere version 7.0 (and later) and the Virtual Enterprise environment.

Troubleshooting


Problem

A minimum/maximum instance violation due to APC's inability to meet the configured minimum or maximum number of defined instances of an application server for a Dynamic Cluster.

Symptom

The log excerpts below from apc.log having apc must gather traces enabled illustrates instance FRMI2-1VerCluster_dev-ap731Node01 being stopped with reason 'LID_CAPACITY' (load independednt capacity) thus indicating insufficient available memory.

FRMI2-1VerCluster_dev-ap731Node01 instance stops suddenly with LID_CAPACITY also another instance on different node also does not start showing similar behavior in such cases min/max is disturbed.

[14/09/22 10:24:01:583 JST] 000002f5 APCXDServerMo 2 statusChangedREAL underLock call() L_0330 xdServerInstance={APCXDServerImpl name=FRMI2-1VerCluster_dev-ap731Node01,node=dev-ap731Node01,cell=DevNetwork,currSize=571.0,maxHeapSize=512.0
[14/09/22 10:24:09:155 JST] 00000488 APCXDTaskProg > changeComplete ENTRY {APCXDChangeDCAbstract:1776176991 server={APCXDServerImpl name=FRMI2-1VerCluster_dev-ap731Node01,node=dev-ap731Node01,cell=DevNetwork,currSize=571.0,maxHeapSize=512.0,maxDemand=-1.0,cluster=FRMI2-1VerCluster,ut={UtilityFunctionAlwaysOne},maint=false,admin=false,disposable=false,startTime=0,state=STOPPED,change=STOP,pretext={PretextCntrInstImpl id=6 reason=LID_CAPACITY thing=P:dev-ap731 changes(2)=[
{StopApplInstChangeImpl id=8, name=FRMI2-1VerCluster, inst=DevNetwork/dev-ap731Node01/FRMI2-1VerCluster_dev-ap731Node01, inside=DevNetwork/dev-ap731Node01/FRMI2-1VerCluster_dev-ap731Node01},
{StopCntrInstChangeImpl id=9, name=FRMI2-1VerCluster, inst=DevNetwork/dev-ap731Node01/FRMI2-1VerCluster_dev-ap731Node01, inside=DevNetwork/dev-ap731Node01}]
}} SUCCESS

[{"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Component":"Not Applicable","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF010","label":"HP-UX"},{"code":"PF012","label":"IBM i"},{"code":"PF016","label":"Linux"},{"code":"PF014","label":"iOS"},{"code":"PF027","label":"Solaris"},{"code":"PF033","label":"Windows"},{"code":"PF035","label":"z\/OS"},{"code":"PF013","label":"Inspur K-UX"}],"Version":"8.5.5;8.5;7.0.0.5;7.0.0.3;7.0.0.1;7.0","Edition":"","Line of Business":{"code":"LOB77","label":"Automation Platform"}}]

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Document Information

Modified date:
03 March 2025

UID

swg21965051

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