Hi, while testing 3.6.1 RC we have found an issue during the shutdown of ZooKeeper Server it is an NPE, below the stacktrace of the error.
The problem is related to https://issues.apache.org/jira/browse/ZOOKEEPER-2845 Data inconsistency issue due to retain database in leader election The issue has been implemented on 3.5 branch since 3.5.4, and it is also on 3.6.0 Probably it is not a real issue but it looks like that ZOOKEEPER-2845 <https://issues.apache.org/jira/browse/ZOOKEEPER-2845> is not beeing executed. Here we are in standalone mode inside a test case of an application, so maybe this NPE won't be seen in a production environment. Does anyone ever seen this problem ? Enrico 20-04-10-10-59-40 SyncRequestProcessor exited! 20-04-10-10-59-40 PrepRequestProcessor exited loop! 20-04-10-10-59-40 shutdown of request processor complete zkservermainrunner 1586509180510 Error : java.lang.NullPointerException java.lang.NullPointerException at org.apache.zookeeper.server.persistence.FileTxnSnapLog.fastForwardFromEdits(FileTxnSnapLog.java:321) at org.apache.zookeeper.server.ZKDatabase.fastForwardDataBase(ZKDatabase.java:300) at org.apache.zookeeper.server.ZooKeeperServer.shutdown(ZooKeeperServer.java:821) at org.apache.zookeeper.server.ZooKeeperServer.shutdown(ZooKeeperServer.java:772) at org.apache.zookeeper.server.NettyServerCnxnFactory.shutdown(NettyServerCnxnFactory.java:657) at org.apache.zookeeper.server.ZooKeeperServerMain.shutdown(ZooKeeperServerMain.java:219) at magnews.zookeeper.ZookeeperServerEmbedded$CloseableZooKeeperServerMain.close(ZookeeperServerEmbedded.java:148) at magnews.zookeeper.ZookeeperServerEmbedded$2.run(ZookeeperServerEmbedded.java:229) ZK server died. Requsting stop on JVM
