how do dmgr knows cluster member is stopped?

answer can be found in two places :

1. read a little about DCS on infocenter
2. When you stop any member of a cluster ... read the systemout.log of nodeagents and dmgr

thank you joseph

When a WAS server is started, a pid file is placed in that server's log directory.  If the server is shut down through a "normal process" that pid file is removed from the server's log directory.  The pid file contains the process if of that server runtime.

thank paul for giving reply but i think it is not correct answer which you provide.

[quote author=91812608 post=532254049]When a WAS server is started, a pid file is placed in that server's log directory.  If the server is shut down through a "normal process" that pid file is removed from the server's log directory.  The pid file contains the process if of that server runtime.[/quote]

this PID file is used to recognize .. if that JVM is running but not used to identify its participation in cluster.

you see DCS messages like this in the log file [_{i wrote this article on my old blog and few people already copy&paste to their pirate blogs}]


[3/3/10 18:00:37:758 CET] 00000026 RoleMember    W   DCSV8104W: DCS Stack DefaultCoreGroup.TestRepln at Member Test-Cell\node01\server01: Removing member [Test-Cell\node02\server02] because the member was requested to be removed  by member Test-Cell\node02\server01. Internal details VL suspects others: CC-Situation Normal
[3/3/10 18:00:38:176 CET] 00000023 VSyncAlgo1    I   DCSV2004I: DCS Stack DefaultCoreGroup at Member Test-Cell\node01\server01: View synchronization completed successfully. The View Identifier is (22898:0.Test-Cell\node02\server01). The internal details are None.
[3/3/10 18:00:38:207 CET] 00000023 VSyncAlgo1    I   DCSV2004I: DCS Stack DefaultCoreGroup.TestRepln at Member Test-Cell\node01\server01: View synchronization completed successfully. The View Identifier is (331:0.Test-Cell\node02\server01). The internal details are None.
[3/3/10 18:00:38:537 CET] 00000024 CoordinatorIm I   HMGR0218I: A new core group view has been installed. The core group is DefaultCoreGroup.
[3/3/10 18:00:39:228 CET] 00000026 DataStackMemb I   DCSV8050I: DCS Stack DefaultCoreGroup.TestRepln at Member Test-Cell\node01\server01: New view installed, identifier (332:0.Test-Cell\node02\server01), view size is 11 (AV=11, CD=12, CN=12, DF=12)
[3/3/10 18:00:39:343 CET] 00000021 DRSBuddyManag A   CWWDR0006I:  Replication instance terminated : Test-Cell\node02\server02


do a grep/search on  'DCSV2' on systemOut.log

Do you mean how does the dmgr know if an active cluster member fails?  That would happen through the HA manager.

WAS v8.5 InfoCenter - High Availability Manager - pic.dhe.ibm.com/infocenter/wasinfo/v8r5/...