The High Availability Manager (HA), Work Load Management (WLM), and Object Request Broker (ORB) component provide several core features in WebSphere Application Server. This session is open to discuss the concepts, issues, and best practices of each component.
Ask the Experts sessions are conducted in a question and answer format. The table below provides a time index (minutes:seconds) to the recording and describes the questions or topics discussed. You can fast forward to any question using the time index, a table containing the panel of experts is also included.
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See the Related Information Section of this document for a list of documents referenced during the presentation.
Ask the Experts session
06 October 2015 - 11:00 a.m. - 12:00 p.m. EDT
|03:50||Introduction of Panel of Experts|
|06:37||What causes CWRLS0030W or DCSV8030I messages in the SystemOut.log file?|
|09:29||What causes HA instability or "split brain" issue?|
|11:06||Do my cellnames need to be unique?|
|12:43||What is the consequence of having multiple ORBs in my JVM from running ORB.init()?|
|19:57||I see strange / unpredictable WLM behavior or performance problems. How do I figure out the problem?|
|32:40||What is the role of HA Manager Bulletin Board service?|
|33:45||What is the role of the nodeagents location service daemon for ORB high availability and load balancing?|
|38:06||Customer environment has one JVM that is hanging and is unable to start another JVM. Why is this occuring? How can this be resolved? See "CWRLS0030W message continuously logged and WAS fails" in Related information for link referenced in this answer.|
|39:44||Do we see any message in SystemOut.log before we enable ORB Trace to identify multiple ORBs?|
|42:17||We see CWRLS0030W or DCSV8030I messages in the systemout.log. What is the solution to fix that, so that the JVMs doesn't wait for the go-ahead from the HA manager? Is there any permanent fix for this other than restarting the HA manager itself? See "Top 10 things to know about HA Manager" in Related information for link referenced in this answer.|
|45:35||What is the recommended cell size or core group? See "How to set Protocol" in Related information for link referenced in this answer.|
|48:40||What is the correct way to bootstrap? See "Getting an initial context" in Related information for link referenced in this answer..|
|50:20||On z/OS, if node agent is not started will this prevent WLM from work properly?|
|51:23||What is the consequence of having multiple ORBs in my JVM from running ORB.init()?|
|53:28||What is meant by good system for core-group?|
|54:47||For the workaround, how do we get the JVM property to ignore transaction recovery? See "3 Ways to Resolve CWRL0030W" in Related information for link referenced in this answer.|
|58:42||End of Call|
Panel of Experts:
|Hobert Bush III||WebSphere Team Lead, Client Success|
|Kumaran Nathan||IBM WebSphere Level 2 Customer Support|
|Claudia S. Barrett||WebSphere ORB L3 Support|
|Thomas F. Seelbach||WebSphere Development|
|Adam Wisniewski||WebSphere on z/OS, HA Manager, & Liberty Dev/Service|
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Original Publication Date
20 October 2015
17 June 2018