Task org.apache.activemq.artemis.utils.actors.ProcessorBase$$Lambda/0x00007f8a20246be8@63fc6f8f rejected from java.util.concurrent.ThreadPoolExecutor@189b5fb1[Shutting down, pool size = 1, active threads = 1, queued tasks = 0, completed tasks = 2]

Task org.apache.activemq.artemis.core.remoting.impl.netty.NettyConnector$Listener$2@4a282dfd rejected from java.util.concurrent.ThreadPoolExecutor@70592729[Shutting down, pool size = 2, active threads = 1, queued tasks = 0, completed tasks = 1]

Task org.apache.activemq.artemis.utils.actors.ProcessorBase$$Lambda$268/0x00007f7d1c23f040@79dd94c3 rejected from java.util.concurrent.ThreadPoolExecutor@5027244c[Shutting down, pool size = 1, active threads = 1, queued tasks = 0, completed tasks = 2]

null is not a legitimate internal value. Concurrent Modification?

Task org.apache.activemq.artemis.core.remoting.impl.netty.NettyConnector$Listener$2@68424be0 rejected from java.util.concurrent.ThreadPoolExecutor@ac26fef[Shutting down, pool size = 1, active threads = 1, queued tasks = 0, completed tasks = 1]

Task org.apache.activemq.artemis.core.remoting.impl.netty.NettyConnector$Listener$2@3b2b3279 rejected from java.util.concurrent.ThreadPoolExecutor@4145b92c[Shutting down, pool size = 1, active threads = 1, queued tasks = 0, completed tasks = 1]