Never disable Workload Management (WLM) on the Administrative Server
 Technote (FAQ)
 
Problem
Disabling the Administrative Server workload management by setting com.ibm.ejs.sm.adminServer.wlm=false can cause numerous problems.
 
Solution
The WebSphere® Administrative Server is designed to work when the WLM facility is enabled. Disabling WLM for the Administrative Server in the admin.config configuration file will cause numerous problems.

There are several potentially serious problems that occur for multi-node, horizontally-scaled configurations when WLM is turned off for the Administrative Servers. For example:
1. There is no failover for administrative functions if WLM is disabled; therefore, one Administrative Server might use data that is cached rather than refreshing it.

2. Intermittent problems with topology not painting can occur in the administrative console. The symptoms are erratic, depending on if one of the multiple nodes was brought down. Trace symptoms can include an interoperable object reference (IOR) with an incorrect port number or incorrect node name.

3. CONM6000W: "Illegal use of single phase commit (1PC) resource in transaction" will probably be in the tracefile when defining Java™ Virtual Machine (JVM™) on multiple nodes.

4. Critical error messages might occur with getAttribute failed when a remote administrative node is stopped and refreshed.

5. Server Groups do not start unless both nodes are running; previously the Server Group started the appropriate clones.

6. When WLM is disabled, many additional symptoms are likely because of the instability of the systems.
Items 1 through 4 are problems that were documented when a customer disabled WLM on the Administrative Server. The problems were resolved when the setting was correctly set to:

com.ibm.ejs.sm.adminServer.wlm=true

To summarize, do not disable WLM on an Administrative Server.
 
 
 


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server > Administrative Console (all non-scripting)
Operating system(s): HP-UX
Software version: 4.0
Software edition:
Reference #: 1082856
IBM Group: Software Group
Modified date: Jun 9, 2004