Hi We have Active MQ and Zookeeper ensemble on 3 nodes. We observed that ActiveMQ goes down for some reason ,which didn't reflected in the log,since log is in debug mode & at it automatically attempts to start itself after some time but fails to do due to below error.Can any one suggest why its happening so .
1767 2018-11-27 14:53:46,423 | DEBUG | [/activemq/leveldb-stores/00000000040] [ZooKeeperTreeTracker@3cda58e0] [Thread[main,5,main]] start tracking leaf node zkTxId=5 1539607591 | org.linkedin.zookeeper.tracker.ZooKeeperTreeTracker | main 2018-11-27 14:53:46,424 | DEBUG | [/activemq/leveldb-stores] [ZooKeeperTreeTracker@3cda58e0] [Thread[main,5,main]] start tracking node zkTxId=51539607590 | org. linkedin.zookeeper.tracker.ZooKeeperTreeTracker | main 1769 2018-11-27 14:53:46,424 | ERROR | Failed to start Apache ActiveMQ (localhost, null) | org.apache.activemq.broker.BrokerService | main 1770 java.lang.NullPointerException 1771 at org.linkedin.zookeeper.tracker.ZooKeeperTreeTracker.raiseEvents(ZooKeeperTreeTracker.java:402)[org.linkedin.zookeeper-impl-1.4.0.jar:] 1772 at org.linkedin.zookeeper.tracker.ZooKeeperTreeTracker.track(ZooKeeperTreeTracker.java:240)[org.linkedin.zookeeper-impl-1.4.0.jar:] -- Sent from: http://activemq.2283324.n4.nabble.com/ActiveMQ-User-f2341805.html
