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From "Ming Ma (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-6478) RemoteException can't be retried properly for non-HA scenario
Date Mon, 02 Jun 2014 23:27:01 GMT
Ming Ma created HDFS-6478:
-----------------------------

             Summary: RemoteException can't be retried properly for non-HA scenario
                 Key: HDFS-6478
                 URL: https://issues.apache.org/jira/browse/HDFS-6478
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Ming Ma


For HA case, the call stack is DFSClient -> RetryInvocationHandler -> ClientNamenodeProtocolTranslatorPB
-> ProtobufRpcEngine. ProtobufRpcEngine. ProtobufRpcEngine throws ServiceException and
expects the caller to unwrap it; ClientNamenodeProtocolTranslatorPB is the component that
takes care of that.

{noformat}
        at org.apache.hadoop.ipc.Client.call
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke
        at com.sun.proxy.$Proxy26.getFileInfo
        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo
        at sun.reflect.GeneratedMethodAccessor24.invoke
        at sun.reflect.DelegatingMethodAccessorImpl.invoke
        at java.lang.reflect.Method.invoke
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke
        at com.sun.proxy.$Proxy27.getFileInfo
        at org.apache.hadoop.hdfs.DFSClient.getFileInfo
        at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus
{noformat}

However, for non-HA case, the call stack is DFSClient -> ClientNamenodeProtocolTranslatorPB
-> RetryInvocationHandler -> ProtobufRpcEngine. RetryInvocationHandler gets ServiceException
and can't be retried properly.

{noformat}
at org.apache.hadoop.ipc.Client.call
at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke
at com.sun.proxy.$Proxy9.getListing
at sun.reflect.NativeMethodAccessorImpl.invoke0
at sun.reflect.NativeMethodAccessorImpl.invoke
at sun.reflect.DelegatingMethodAccessorImpl.invoke
at java.lang.reflect.Method.invoke
at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke
at com.sun.proxy.$Proxy9.getListing
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getListing
at org.apache.hadoop.hdfs.DFSClient.listPaths
{noformat}

Perhaps, we can fix it by have NN wrap RetryInvocationHandler around ClientNamenodeProtocolTranslatorPB
and other PBs, instead of the current wrap order.



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