Packet Speaker Thread in a Coherence Node Can Become Blocked Trying to Lock a java.lang.DatagramPacket When Using either Java 7u80 or Java 8u40 and Later
(Doc ID 2023934.1)
Last updated on MAY 20, 2024
Applies to:
Oracle Coherence - Version 12.1.3.0.0 to 12.1.3.0.2 [Release 12c]Oracle Coherence - Version 12.1.2.0.0 to 12.1.2.0.4 [Release 12c]
Information in this document applies to any platform.
Symptoms
Issue encountered when running Coherence 12.1.2.0.x (where x=0,1,2,3,4) and 12.1.3.0.y (where y=0,1,2) and either Java 7u80 or Java 8u40 and higher, and the cluster is configured to use multicast and not well-known addresses (WKA) as the cluster discovery mechanism.
When the issue occurs a thread dump will show that either the publisher or speaker thread is waiting to lock an instance of java.net.DatagramPacket, which is not locked by any other thread, for example:
As a consequence of this other nodes will report communication issues with the node, potentially leading to its ejection from the cluster.
Cause
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In this Document
| Symptoms |
| Cause |
| Solution |
| References |