Critical IO Error ... when starting Artemis with HA JDBC store -------------------------------------------------------------- Key: WFWIP-72 URL: https://issues.jboss.org/browse/WFWIP-72 Project: WildFly WIP Issue Type: Bug Components: Artemis, JMS Reporter: Miroslav Novak Assignee: Martyn Taylor Priority: Blocker Attachments: log-node-1.zip One of the servers in collocated HA topology with JDBC store can fail on critical IO exception and stop itself. This was hit on Artemis 1.5.5.012 and WF: https://github.com/jmesnil/wildfly - WFLY-9513_messaging_jdbc_HA_shared-store branch. Test scenario: * Start 2 WF/EAP servers in collocated topology with Artemis HA JDBC store * Start client which are sending and consuming messages to/from queue from 1st server Result: There is intermittent failure when client start to send/receive messages on 1st server. 1st fails on Critical IO Error with exception: {code} 10:19:27,965 WARN [org.apache.activemq.artemis.journal] (Thread-0 (ActiveMQ-server-org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl$3@7de7cbe3)) AMQ142021: Error on IO callback, null 10:19:27,965 WARN [org.apache.activemq.artemis.core.server] (Thread-0 (ActiveMQ-server-org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl$3@7de7cbe3)) AMQ222010: Critical IO Error, shutting down the server. file=org.apache.activemq.artemis.jdbc.store.file.JDBCSequentialFile@407c5d8f, message=Error writing to JDBC file.: java.lang.NullPointerException at org.apache.activemq.artemis.jdbc.store.file.JDBCSequentialFile.internalWrite(JDBCSequentialFile.java:161) [artemis-jdbc-store-1.5.5.jbossorg-012.jar:1.5.5.jbossorg-012] at org.apache.activemq.artemis.jdbc.store.file.JDBCSequentialFile.internalWrite(JDBCSequentialFile.java:186) [artemis-jdbc-store-1.5.5.jbossorg-012.jar:1.5.5.jbossorg-012] at org.apache.activemq.artemis.jdbc.store.file.JDBCSequentialFile.lambda$scheduleWrite$1(JDBCSequentialFile.java:197) [artemis-jdbc-store-1.5.5.jbossorg-012.jar:1.5.5.jbossorg-012] at org.apache.activemq.artemis.utils.OrderedExecutorFactory$OrderedExecutor$ExecutorTask.run(OrderedExecutorFactory.java:122) [artemis-commons-1.5.5.jbossorg-012.jar:1.5.5.jbossorg-012] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [rt.jar:1.8.0_171] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [rt.jar:1.8.0_171] at java.lang.Thread.run(Thread.java:748) [rt.jar:1.8.0_171] {code} NPE happens at {{JDBCSequentialFile.internalWrite}} line 161: {code} private synchronized int internalWrite(byte[] data, IOCallback callback) { try { open(); 161 synchronized (writeLock) { <-- NPE is thrown here ... {code} . Attaching logs from the test.