My Oracle Support Banner

OP-Oracle Access Manager 11g R2PS3 (OAM Cannot Accept Connections From Client - Maximum Thread Constraint ClusterMessaging Reached (Doc ID 2328757.1)

Last updated on MAY 24, 2022

Applies to:

Oracle Access Manager - Version and later
Information in this document applies to any platform.
Oracle is not responsible for instructions/information from 3rd party sites that may be contained in this KM note.


Experiencing two issues and need input of what may cause this and what they might check to try and resolve.

This is a production system. However, the issue happen during off load periods... such as at night. This is happening on all 8 servers and they do not believe it is network related.

1) They are finding that the load balancer heart beat is taking 5 or 10 seconds to come back at times. They have checked the LB logs. But, nothing to report.

2) They also see errors in the logs "maximum thread constraint ClusterMessaging"

They do not believe that the two errors above are necessarily related. But, need to know what to check or explain the issue.

Maximum thread constraint ClusterMessaging is reached 4 times for last 1,498 seconds, due to this OAM11g cannot accept connections from client.


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

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