Service Bus 12c: Stuck threads due to 'java.util.concurrent.Semaphore$NonfairSync' When 'sendMessageAsync' Holds Semaphore

(Doc ID 2328648.1)

Last updated on FEBRUARY 27, 2018

Applies to:

Oracle Service Bus - Version and later
Information in this document applies to any platform.


On : version, Product Installation

After restarting the environment or importing projects, stuck threads begin appearing intermittently in the OSB logs and the health of the OSB servers go into a warning state. The stuck threads always point to java.util.concurrent.Semaphore$NonfairSync


The issue can be reproduced at will with the following steps:
1. Restart environment
2. When the servers are up and running, stuck threads can be seen.

The issue has the following business impact:
Due to this issue, the environment becomes unstable and has to be restarted.




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