My Oracle Support Banner

How to Debug RJVM or Intra-Cluster Communication Problems in WebLogic Server (WLS) (Doc ID 1300174.1)

Last updated on OCTOBER 02, 2023

Applies to:

Oracle WebLogic Server - Version 9.2 and later
Information in this document applies to any platform.
This document is informational and intended for any user using the Oracle WebLogic Platform Server Product.


The term intra-cluster communication refers to communication between WebLogic Server instances in a cluster.  Servers communicate with one another using IP sockets (peer-to-peer communication) and IP unicast or multicast.

Due to the complexity of the technologies involved (e.g. networking, OS, IPs etc), performance issues could arise and java exceptions could be thrown (e.g., PeerGoneException, SocketException, etc.). 
Some tools are available to check the health of multicast messaging.  Others can be used to monitor the network traffic and statistics (e.g., netstat or tcpdump).
In this document, we will only review internal WebLogic Server debugging options.

Troubleshooting Steps

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document
Troubleshooting Steps
 Debug Settings
 Debug Messages Interpretation
 Sample of logged debug messages

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.