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Devarshi Shah commented on ZOOKEEPER-3988: ------------------------------------------ Hi [~lhotari] & [~eolivelli], May we know which Apache Zookeeper version might fix this issue and when? _//BR, Devarshi._ > org.apache.zookeeper.server.NettyServerCnxn.receiveMessage throws > NullPointerException > -------------------------------------------------------------------------------------- > > Key: ZOOKEEPER-3988 > URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3988 > Project: ZooKeeper > Issue Type: Bug > Components: server > Affects Versions: 3.6.1 > Environment: K8S > Reporter: Pratik Thacker > Assignee: David Mollitor > Priority: Major > Labels: pull-request-available > Time Spent: 1h > Remaining Estimate: 0h > > While upgrading K8S cluster, container running zookeeper will rollover one by > one. > During this rollover, Null Pointer Exception was observed as below. > {code:java} > INFO > [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=0.0.0.0:2281):Follower@292] - > shutdown FollowerINFO > [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=0.0.0.0:2281):Follower@292] - > shutdown FollowerINFO > [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=0.0.0.0:2281):LearnerZooKeeperServer@160] > - Shutting downINFO > [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=0.0.0.0:2281):ZooKeeperServer@784] > - shutting downINFO > [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=0.0.0.0:2281):RequestThrottler@244] > - Shutting downINFO [RequestThrottler:RequestThrottler@205] - Draining > request throttler queueINFO [RequestThrottler:RequestThrottler@181] - > RequestThrottler shutdown. Dropped 0 requestsINFO > [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=0.0.0.0:2281):FollowerRequestProcessor@148] > - Shutting downINFO > [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=0.0.0.0:2281):CommitProcessor@617] > - Shutting downINFO > [FollowerRequestProcessor:1:FollowerRequestProcessor@112] - > FollowerRequestProcessor exited loop!INFO > [CommitProcessor:1:CommitProcessor@406] - CommitProcessor exited loop!INFO > [QuorumPeer[myid=1](plain=0.0.0.0:2181)(secure=0.0.0.0:2281):FinalRequestProcessor@662] > - shutdown of request processor completeERROR > [nioEventLoopGroup-4-22:NettyServerCnxnFactory$CnxnChannelHandler@329] - > Unexpected exception in receivejava.lang.NullPointerException: null at > org.apache.zookeeper.server.NettyServerCnxn.receiveMessage(NettyServerCnxn.java:515) > ~[zookeeper-3.6.1.jar:3.6.1] at > org.apache.zookeeper.server.NettyServerCnxn.processMessage(NettyServerCnxn.java:365) > ~[zookeeper-3.6.1.jar:3.6.1] at > org.apache.zookeeper.server.NettyServerCnxnFactory$CnxnChannelHandler.channelRead(NettyServerCnxnFactory.java:326) > [zookeeper-3.6.1.jar:3.6.1] at > io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) > [netty-common-4.1.48.Final.jar:4.1.48.Final] at > io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) > [netty-common-4.1.48.Final.jar:4.1.48.Final] at > io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) > [netty-common-4.1.48.Final.jar:4.1.48.Final] at > java.lang.Thread.run(Thread.java:834) [?:?]WARN > [nioEventLoopGroup-4-22:NettyServerCnxnFactory$CnxnChannelHandler@273] - > Exception caughtjava.lang.NullPointerException: null at > org.apache.zookeeper.server.NettyServerCnxn.receiveMessage(NettyServerCnxn.java:515) > ~[zookeeper-3.6.1.jar:3.6.1] at > org.apache.zookeeper.server.NettyServerCnxn.processMessage(NettyServerCnxn.java:365) > ~[zookeeper-3.6.1.jar:3.6.1] at > org.apache.zookeeper.server.NettyServerCnxnFactory$CnxnChannelHandler.channelRead(NettyServerCnxnFactory.java:326) > ~[zookeeper-3.6.1.jar:3.6.1] at > io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) > [netty-transport-4.1.48.Final.jar:4.1.48.Final] at > io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) > [netty-common-4.1.48.Final.jar:4.1.48.Final] at > io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) > [netty-common-4.1.48.Final.jar:4.1.48.Final] at > io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) > [netty-common-4.1.48.Final.jar:4.1.48.Final] at > java.lang.Thread.run(Thread.java:834) [?:?] {code} > Expectation: This scenario should be handled and application should not throw > such Null Pointer exception. -- This message was sent by Atlassian Jira (v8.20.1#820001)