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https://issues.apache.org/jira/browse/HDFS-15032?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16988082#comment-16988082
]
Erik Krogen commented on HDFS-15032:
------------------------------------
You'll get an exception like:
{code}
19/12/04 18:17:44 ERROR balancer.Balancer: Exiting balancer due an exception
java.lang.reflect.UndeclaredThrowableException
at com.sun.proxy.$Proxy4.getHAServiceState(Unknown Source)
at
org.apache.hadoop.hdfs.server.namenode.ha.ObserverReadProxyProvider.getHAServiceState(ObserverReadProxyProvider.java:276)
at
org.apache.hadoop.hdfs.server.namenode.ha.ObserverReadProxyProvider.changeProxy(ObserverReadProxyProvider.java:262)
at
org.apache.hadoop.hdfs.server.namenode.ha.ObserverReadProxyProvider.access$900(ObserverReadProxyProvider.java:69)
at
org.apache.hadoop.hdfs.server.namenode.ha.ObserverReadProxyProvider$ObserverReadInvocationHandler.invoke(ObserverReadProxyProvider.java:399)
at com.sun.proxy.$Proxy4.getDatanodeStorageReport(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:422)
at
org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:165)
at
org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:157)
at
org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:95)
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:359)
at com.sun.proxy.$Proxy4.getDatanodeStorageReport(Unknown Source)
at
org.apache.hadoop.hdfs.server.balancer.NameNodeConnector.getLiveDatanodeStorageReport(NameNodeConnector.java:198)
at
org.apache.hadoop.hdfs.server.balancer.Dispatcher.init(Dispatcher.java:1001)
at
org.apache.hadoop.hdfs.server.balancer.Balancer.runOneIteration(Balancer.java:602)
at
org.apache.hadoop.hdfs.server.balancer.Balancer.run(Balancer.java:696)
at
org.apache.hadoop.hdfs.server.balancer.Balancer$Cli.run(Balancer.java:775)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
at
org.apache.hadoop.hdfs.server.balancer.Balancer.main(Balancer.java:918)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.apache.hadoop.ipc.ProxyCombiner$CombinedProxyInvocationHandler.invoke(ProxyCombiner.java:97)
... 23 more
Caused by: java.net.ConnectException: Call From <SOURCE> to
<DESTINATION_NAMENODE> failed on connection exception:
java.net.ConnectException: Connection refused; For more details see:
http://wiki.apache.org/hadoop/ConnectionRefused
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:824)
at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:754)
at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1544)
at org.apache.hadoop.ipc.Client.call(Client.java:1486)
at org.apache.hadoop.ipc.Client.call(Client.java:1385)
at
org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:232)
at
org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:118)
at com.sun.proxy.$Proxy15.getHAServiceState(Unknown Source)
at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getHAServiceState(ClientNamenodeProtocolTranslatorPB.java:1630)
... 28 more
Caused by: java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at
sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
at
org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:531)
at
org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:701)
at
org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:805)
at org.apache.hadoop.ipc.Client$Connection.access$3700(Client.java:423)
at org.apache.hadoop.ipc.Client.getConnection(Client.java:1601)
at org.apache.hadoop.ipc.Client.call(Client.java:1432)
... 33 more
{code}
> Balancer crashes when it fails to contact an NN via ObserverReadProxyProvider
> -----------------------------------------------------------------------------
>
> Key: HDFS-15032
> URL: https://issues.apache.org/jira/browse/HDFS-15032
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: balancer & mover
> Affects Versions: 2.10.0
> Reporter: Erik Krogen
> Assignee: Erik Krogen
> Priority: Major
>
> When trying to run the Balancer using ObserverReadProxyProvider (to allow it
> to read from the Observer Node as described in HDFS-14979), if one of the NNs
> isn't running, the Balancer will crash.
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