Run following command in artemis-core-client directory [treblereel@dhcp-10-40-4-236 artemis-core-client]$ find -name "*.java" | grep -i -E -v "test|example|junit" | xargs grep -i -E "LOG(GER)*\.error\(|LOG(GER)*\.warn\(|LOG(GER)*\.info\(" ./src/main/java/org/apache/activemq/artemis/core/cluster/DiscoveryGroup.java: ActiveMQClientLogger.LOGGER.warn( "Unexpected null data received from DiscoveryEndpoint" ); ./src/main/java/org/apache/activemq/artemis/core/protocol/core/impl/RemotingConnectionImpl.java: ActiveMQClientLogger.LOGGER.warn(e.getMessage(), e); ./src/main/java/org/apache/activemq/artemis/core/client/impl/ClientConsumerImpl.java: ActiveMQClientLogger.LOGGER.warn( "problem cleaning up: " + this ); ./src/main/java/org/apache/activemq/artemis/core/client/impl/ClientConsumerImpl.java: ActiveMQClientLogger.LOGGER.warn(e.getMessage(), e); ./src/main/java/org/apache/activemq/artemis/core/client/impl/ClientSessionFactoryImpl.java: ActiveMQClientLogger.LOGGER.warn(e.getMessage(), e); ./src/main/java/org/apache/activemq/artemis/core/client/impl/ClientSessionFactoryImpl.java: logger.warn(t.getMessage(), t); ./src/main/java/org/apache/activemq/artemis/core/remoting/impl/netty/NettyConnection.java: ActiveMQClientLogger.LOGGER.warn(logOnly.getMessage(), logOnly); ./src/main/java/org/apache/activemq/artemis/core/remoting/impl/netty/NettyConnection.java: ActiveMQClientLogger.LOGGER.warn(e.getMessage(), e); ./src/main/java/org/apache/activemq/artemis/core/remoting/impl/netty/NettyConnection.java: logger.warn( "Trying to allocate " + size + " bytes, System is throwing OutOfMemoryError on NettyConnection " + this + ", there are currently " + "pendingWrites: [NETTY] -> " + totalPendingWriteBytes + "[EVENT LOOP] -> " + pendingWritesOnEventLoopView.get() + " causes: " + oom.getMessage(), oom); ./src/main/java/org/apache/activemq/artemis/core/remoting/impl/netty/NettyConnection.java: logger.warn( "FAILURE! The code is using blockUntilWritable inside a Netty worker, which would block. " + ./src/main/java/org/apache/activemq/artemis/core/remoting/impl/netty/NettyConnector.java: ActiveMQClientLogger.LOGGER.error( "Cannot resolve host" , e); ./src/main/java/org/apache/activemq/artemis/core/remoting/impl/netty/Epoll.java: logger.warn(e.getMessage(), e); ./src/main/java/org/apache/activemq/artemis/utils/VersionLoader.java: ActiveMQClientLogger.LOGGER.warn(e.getMessage(), e); ./src/main/java/org/apache/activemq/artemis/utils/VersionLoader.java: ActiveMQClientLogger.LOGGER.error(e.getMessage(), e); ./src/main/java/org/apache/activemq/artemis/api/core/client/ActiveMQClient.java: ActiveMQClientLogger.LOGGER.warn( "Couldn't finish the client globalThreadPool in less than 10 seconds, interrupting it now" ); ./src/main/java/org/apache/activemq/artemis/api/core/client/ActiveMQClient.java: ActiveMQClientLogger.LOGGER.warn( "Couldn't finish the client scheduled in less than 10 seconds, interrupting it now" ); ./src/main/java/org/apache/activemq/artemis/api/core/UDPBroadcastEndpointFactory.java: ActiveMQClientLogger.LOGGER.warn( this + " getting exception when receiving broadcasting." , e); ./src/main/java/org/apache/activemq/artemis/api/core/UDPBroadcastEndpointFactory.java: ActiveMQClientLogger.LOGGER.warn(t); ./src/main/java/org/apache/activemq/artemis/api/core/UDPBroadcastEndpointFactory.java: ActiveMQClientLogger.LOGGER.warn(t.getMessage(), t);