PQ76488: OpCenter does not recover from disconneted appServer

 Fixes are available

PQ76488; 5.0.2; OpsCenter does not recover from disconnected appServer
5.0.2.6: WebSphere Application Server Enterprise 5.0.2 Cumulative Fix 6
5.0.2.2: WebSphere Application Server Enterprise V5.0.2 Cumulative Fix 2



APAR status
Closed as program error.

Error description
Here's the scenario
-dmgr and appserver1 on 1 box,  appserver2 on another box
-start dmgr, wlmc and opcenter... all running correctly
-unplug the ehternet cable to appServer2
-in wlmc.log i start getting NODE_UNAVAILABLE and
SERVER_UNAVAILABLE RCs as expected
-after some time, plug ethernet cable back in
-I expect *UNAVAILABLE  to go away and change to SUCCESS, but
they do not.  So, the disconnected/reconnected appServer is
not recovered in opCenter when it is reconnected.
Local fix Problem summary
****************************************************************
* USERS AFFECTED: Users of work load manager who experience    *
*                 a disconnected network adapter will not be   *
*                 able to balance across WebSphere             *
*                 application servers correctly.               *
****************************************************************
* PROBLEM DESCRIPTION: In a deployed environment where one or  *
*                      more WebSphere application servers are  *
*                      unavailable because of a disconnected   *
*                      network adapter, the Performance        *
*                      Monitoring Infrastructure (PMI) metric  *
*                      data cannot be returned back to the     *
*                      WorkLoad Manager Controller (WLMC)      *
*                      even after the adapter is reconnected.  *
****************************************************************
* RECOMMENDATION: To ensure the proper recovery of PMI         *
*                 metric data to the WorkLoad Manager          *
*                 Controller in either a test or               *
*                 production environment where the             *
*                 network adapter becomes disconnected,        *
*                 you must install interim fix                 *
*                 PQ76488.                                     *
****************************************************************
In a deployed environment where there are one or
more WebSphere application servers and WorkLoad
Manager is enabled, if a network adapter becomes
disconnected or has a hardware failure, OpCenter
detects that all application servers on that node
are unavailable.  However, even when the network
adapter is reconnected/replaced, OpCenter fails
to detect and change the state of those application
servers to available.  The end result is PMI metric
data is not collected and submitted to WorkLoad
Manager.   This will cause inaccurate work load
balancing among the application servers in the
deployed environment.
Problem conclusion
In order to ensure that OpCenter correctly
updates the states of application servers on a node
that has experienced a disconnected network adapter,
interim fix PQ74688 should be applied.
Temporary fix
Without applying this interim fix, after the network
adapter is reconnected again, the customer can
restart the Deployment Manager.  Notification of the correct
running states will be detected by the OpCenter.
Comments
APAR information
APAR number PQ76488
Reported component name WAS ENTERPRISE
Reported component ID 5630A3700
Reported release 00A
Status CLOSED PER
PE NoPE
HIPER NoHIPER
Special Attention NoSpecatt
Submitted date 2003-07-17
Closed date 2003-07-25
Last modified date 2003-07-25

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Modules/Macros
OpCenter          

Publications Referenced

Fix information

Applicable component levels
R003 PSY    UP
R00A PSY    UP
R00H PSY    UP
R00I PSY    UP
R00S PSY    UP
R00W PSY    UP


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server > Enterprise Edition (EE)
Operating system(s):
Software version: 00A
Software edition:
Reference #: PQ76488
IBM Group: Software Group
Modified date: Jul 25, 2003