[ARTEMIS-2185] High allocation pressure due to pre generated ActiveMQExceptionMessage

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Not A Bug
• Affects Version/s: 2.6.3
• Component/s: Broker
• Labels: ChannelImpl Memory collection garbage
• Assignee: Unassigned
• Reporter: juergen schmied
• Created: 27/Nov/18 03:52
• Updated: 13/Jan/20 02:29
• Resolved: 13/Jan/20 02:29

Description

In org.apache.activemq.artemis.core.protocol.core.impl.ChannelImpl there is

   public void returnBlocking(Throwable cause) {
      lock.lock();

      try {
         response = new ActiveMQExceptionMessage(ActiveMQClientMessageBundle.BUNDLE.unblockingACall(cause));

         sendCondition.signal();
      } finally {
         lock.unlock();
      }
   }

The response is created but not used normally.

For every get/close connection there is the a ActiveMQExceptionMessage incl. stacktrace created and abandoned.

This shows a high allocation pressure in jmc (8 MB garbage/200 calls).

please don't precreate the unused exception (maybe use a producer producing exception when really needed)