gianm opened a new issue, #5326:
URL: https://github.com/apache/druid/issues/5326
I think I haven't seen this before. Noticed it with the current master. I'm
not sure what is going on, but it looks related to the read-timeout handler we
add in NettyHttpClient.
```
2018-02-02T08:13:37,626 WARN [HttpClient-Netty-Worker-0]
org.jboss.netty.channel.DefaultChannelPipeline - An exception was thrown by a
user handler while handling an exception event ([id: 0xdf1578fe, /1
72.31.12.65:39006 :> ip-172-31-3-17.ec2.internal/172.31.3.17:8304]
EXCEPTION: org.jboss.netty.handler.timeout.ReadTimeoutException)
java.util.NoSuchElementException: read-timeout
at
org.jboss.netty.channel.DefaultChannelPipeline.getContextOrDie(DefaultChannelPipeline.java:684)
~[netty-3.10.6.Final.jar:?]
at
org.jboss.netty.channel.DefaultChannelPipeline.remove(DefaultChannelPipeline.java:153)
[netty-3.10.6.Final.jar:?]
at
io.druid.java.util.http.client.NettyHttpClient$1.removeHandlers(NettyHttpClient.java:329)
~[java-util-0.12.0-SNAPSHOT.jar:0.12.0-SNAPSHOT]
at
io.druid.java.util.http.client.NettyHttpClient$1.exceptionCaught(NettyHttpClient.java:293)
~[java-util-0.12.0-SNAPSHOT.jar:0.12.0-SNAPSHOT]
at
org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:112)
~[netty-3.10.6.Final.jar:?]
at
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
[netty-3.10.6.Final.jar:?]
at
org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
[netty-3.10.6.Final.jar:?]
at
org.jboss.netty.channel.Channels.fireExceptionCaught(Channels.java:536)
[netty-3.10.6.Final.jar:?]
at
org.jboss.netty.handler.timeout.ReadTimeoutHandler.readTimedOut(ReadTimeoutHandler.java:236)
[netty-3.10.6.Final.jar:?]
at
org.jboss.netty.handler.timeout.ReadTimeoutHandler$ReadTimeoutTask$1.run(ReadTimeoutHandler.java:276)
[netty-3.10.6.Final.jar:?]
at
org.jboss.netty.channel.socket.ChannelRunnableWrapper.run(ChannelRunnableWrapper.java:40)
[netty-3.10.6.Final.jar:?]
at
org.jboss.netty.channel.socket.nio.AbstractNioSelector.processTaskQueue(AbstractNioSelector.java:391)
[netty-3.10.6.Final.jar:?]
at
org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:315)
[netty-3.10.6.Final.jar:?]
at
org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
[netty-3.10.6.Final.jar:?]
at
org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
[netty-3.10.6.Final.jar:?]
at
org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
[netty-3.10.6.Final.jar:?]
at
org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
[netty-3.10.6.Final.jar:?]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[?:1.8.0_152]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[?:1.8.0_152]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_152]
```
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