[
https://issues.apache.org/jira/browse/HBASE-26937?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andrew Kyle Purtell updated HBASE-26937:
----------------------------------------
Description:
Warnings from HBASE-26220 (Use P2P communicate between region servers to sync
the list for bootstrap node) in normal operation with some write load applied:
{noformat}
[01]2022-04-07T23:14:21,365 WARN [BootstrapNodeManager]
regionserver.BootstrapNodeManager: failed to request region server
ip-172-31-51-4.us-west-2.compute.internal,8120,1649373044119
[01]org.apache.hadoop.hbase.exceptions.ConnectionClosedException: Call to
address=ip-172-31-51-4.us-west-2.compute.internal:8120 failed on local
exception: org.apache.hadoop.hbase.exceptions.Connectio
nClosedException: Connection closed
[01] at org.apache.hadoop.hbase.ipc.IPCUtil.wrapException(IPCUtil.java:215)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at
org.apache.hadoop.hbase.ipc.AbstractRpcClient.onCallFinished(AbstractRpcClient.java:387)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at
org.apache.hadoop.hbase.ipc.AbstractRpcClient.access$100(AbstractRpcClient.java:93)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at
org.apache.hadoop.hbase.ipc.AbstractRpcClient$3.run(AbstractRpcClient.java:424)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at
org.apache.hadoop.hbase.ipc.AbstractRpcClient$3.run(AbstractRpcClient.java:419)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at org.apache.hadoop.hbase.ipc.Call.callComplete(Call.java:119)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at org.apache.hadoop.hbase.ipc.Call.setException(Call.java:134)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at
org.apache.hadoop.hbase.ipc.NettyRpcDuplexHandler.cleanupCalls(NettyRpcDuplexHandler.java:207)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at
org.apache.hadoop.hbase.ipc.NettyRpcDuplexHandler.channelInactive(NettyRpcDuplexHandler.java:215)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:392)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:357)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.ChannelInboundHandlerAdapter.channelInactive(ChannelInboundHandlerAdapter.java:81)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.handler.timeout.IdleStateHandler.channelInactive(IdleStateHandler.java:277)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline$HeadContext.channelInactive(DefaultChannelPipeline.java:1405)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:901)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannel$AbstractUnsafe$7.run(AbstractChannel.java:813)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:384)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at java.lang.Thread.run(Thread.java:829) ~[?:?]
[01]Caused by: org.apache.hadoop.hbase.exceptions.ConnectionClosedException:
Connection closed
{noformat}
was:
I have no idea what this is yet:
{noformat}
[01]2022-04-07T23:14:21,365 WARN [BootstrapNodeManager]
regionserver.BootstrapNodeManager: failed to request region server
ip-172-31-51-4.us-west-2.compute.internal,8120,1649373044119
[01]org.apache.hadoop.hbase.exceptions.ConnectionClosedException: Call to
address=ip-172-31-51-4.us-west-2.compute.internal:8120 failed on local
exception: org.apache.hadoop.hbase.exceptions.Connectio
nClosedException: Connection closed
[01] at org.apache.hadoop.hbase.ipc.IPCUtil.wrapException(IPCUtil.java:215)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at
org.apache.hadoop.hbase.ipc.AbstractRpcClient.onCallFinished(AbstractRpcClient.java:387)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at
org.apache.hadoop.hbase.ipc.AbstractRpcClient.access$100(AbstractRpcClient.java:93)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at
org.apache.hadoop.hbase.ipc.AbstractRpcClient$3.run(AbstractRpcClient.java:424)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at
org.apache.hadoop.hbase.ipc.AbstractRpcClient$3.run(AbstractRpcClient.java:419)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at org.apache.hadoop.hbase.ipc.Call.callComplete(Call.java:119)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at org.apache.hadoop.hbase.ipc.Call.setException(Call.java:134)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at
org.apache.hadoop.hbase.ipc.NettyRpcDuplexHandler.cleanupCalls(NettyRpcDuplexHandler.java:207)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at
org.apache.hadoop.hbase.ipc.NettyRpcDuplexHandler.channelInactive(NettyRpcDuplexHandler.java:215)
~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:392)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:357)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.ChannelInboundHandlerAdapter.channelInactive(ChannelInboundHandlerAdapter.java:81)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.handler.timeout.IdleStateHandler.channelInactive(IdleStateHandler.java:277)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline$HeadContext.channelInactive(DefaultChannelPipeline.java:1405)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:901)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.AbstractChannel$AbstractUnsafe$7.run(AbstractChannel.java:813)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:384)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at
org.apache.hbase.thirdparty.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
~[hbase-shaded-netty-4.1.0.jar:?]
[01] at java.lang.Thread.run(Thread.java:829) ~[?:?]
[01]Caused by: org.apache.hadoop.hbase.exceptions.ConnectionClosedException:
Connection closed
{noformat}
> BootstrapNodeManager "failed to request region server" warnings
> ---------------------------------------------------------------
>
> Key: HBASE-26937
> URL: https://issues.apache.org/jira/browse/HBASE-26937
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.5.0, 3.0.0-alpha-2, 2.6.0
> Reporter: Andrew Kyle Purtell
> Priority: Major
>
> Warnings from HBASE-26220 (Use P2P communicate between region servers to sync
> the list for bootstrap node) in normal operation with some write load applied:
> {noformat}
> [01]2022-04-07T23:14:21,365 WARN [BootstrapNodeManager]
> regionserver.BootstrapNodeManager: failed to request region server
> ip-172-31-51-4.us-west-2.compute.internal,8120,1649373044119
> [01]org.apache.hadoop.hbase.exceptions.ConnectionClosedException: Call to
> address=ip-172-31-51-4.us-west-2.compute.internal:8120 failed on local
> exception: org.apache.hadoop.hbase.exceptions.Connectio
> nClosedException: Connection closed
> [01] at
> org.apache.hadoop.hbase.ipc.IPCUtil.wrapException(IPCUtil.java:215)
> ~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
> [01] at
> org.apache.hadoop.hbase.ipc.AbstractRpcClient.onCallFinished(AbstractRpcClient.java:387)
> ~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
> [01] at
> org.apache.hadoop.hbase.ipc.AbstractRpcClient.access$100(AbstractRpcClient.java:93)
> ~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
> [01] at
> org.apache.hadoop.hbase.ipc.AbstractRpcClient$3.run(AbstractRpcClient.java:424)
> ~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
> [01] at
> org.apache.hadoop.hbase.ipc.AbstractRpcClient$3.run(AbstractRpcClient.java:419)
> ~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
> [01] at org.apache.hadoop.hbase.ipc.Call.callComplete(Call.java:119)
> ~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
> [01] at org.apache.hadoop.hbase.ipc.Call.setException(Call.java:134)
> ~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
> [01] at
> org.apache.hadoop.hbase.ipc.NettyRpcDuplexHandler.cleanupCalls(NettyRpcDuplexHandler.java:207)
> ~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
> [01] at
> org.apache.hadoop.hbase.ipc.NettyRpcDuplexHandler.channelInactive(NettyRpcDuplexHandler.java:215)
> ~[hbase-client-2.5.0-SNAPSHOT.jar:2.5.0-SNAPSHOT]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:392)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:357)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.ChannelInboundHandlerAdapter.channelInactive(ChannelInboundHandlerAdapter.java:81)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.handler.timeout.IdleStateHandler.channelInactive(IdleStateHandler.java:277)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:241)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline$HeadContext.channelInactive(DefaultChannelPipeline.java:1405)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:262)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:248)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:901)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.AbstractChannel$AbstractUnsafe$7.run(AbstractChannel.java:813)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:384)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at
> org.apache.hbase.thirdparty.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
> ~[hbase-shaded-netty-4.1.0.jar:?]
> [01] at java.lang.Thread.run(Thread.java:829) ~[?:?]
> [01]Caused by: org.apache.hadoop.hbase.exceptions.ConnectionClosedException:
> Connection closed
> {noformat}
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