Artemis client faces lots of Warnings "AMQ212051: Invalid concurrent session usage

Solution Verified - Updated -


  • We have a standalone AMQ Artemis broker and on of our client (in production) faces lots of warnings of the type
org.apache.activemq.artemis.core.client- AMQ212051: Invalid concurrent session usage. Sessions are not supposed to be used by more than one thread concurrently. 
  • Questions:
    • What is the consequence of this? Are there any issues to be accepted like loss of messages?
    • Are these messages known and are there ways to prevent that? All references to this warning were rather old and in issues fixed long ago.


  • Red Hat Enterprise Application Platform (EAP)
    • 7.x
  • Apache Artemis

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