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  1. Hadoop HDFS
  2. HDFS-4846

Clean up snapshot CLI commands output stacktrace for invalid arguments

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.1.0-beta
    • Component/s: snapshots
    • Labels:
    • Hadoop Flags:
      Reviewed

      Description

      It'd be useful to clean up the stacktraces output by the snapshot CLI commands when the commands are used incorrectly. This will make things more readable for operators and hopefully prevent confusion.

      Allowing a snapshot on a directory that doesn't exist

      schu-mbp:~ schu$ hdfs dfsadmin -allowSnapshot adfasdf
      2013-05-23 15:46:46.052 java[24580:1203] Unable to load realm info from SCDynamicStore
      2013-05-23 15:46:46,066 WARN  [main] util.NativeCodeLoader (NativeCodeLoader.java:<clinit>(62)) - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
      allowSnapshot: Directory does not exist: /user/schu/adfasdf
      	at org.apache.hadoop.hdfs.server.namenode.INodeDirectory.valueOf(INodeDirectory.java:52)
      	at org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotManager.setSnapshottable(SnapshotManager.java:106)
      	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.allowSnapshot(FSNamesystem.java:5861)
      	at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.allowSnapshot(NameNodeRpcServer.java:1121)
      	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.allowSnapshot(ClientNamenodeProtocolServerSideTranslatorPB.java:932)
      	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:48087)
      	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:527)
      	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1033)
      	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1842)
      	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1838)
      	at java.security.AccessController.doPrivileged(Native Method)
      	at javax.security.auth.Subject.doAs(Subject.java:396)
      	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1489)
      	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1836)
      
      schu-mbp:~ schu$ 
      

      Disallow a snapshot on a directory that isn't snapshottable

      schu-mbp:~ schu$ hdfs dfsadmin -disallowSnapshot /user
      2013-05-23 15:49:07.251 java[24687:1203] Unable to load realm info from SCDynamicStore
      2013-05-23 15:49:07,265 WARN  [main] util.NativeCodeLoader (NativeCodeLoader.java:<clinit>(62)) - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
      disallowSnapshot: Directory is not a snapshottable directory: /user
      	at org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectorySnapshottable.valueOf(INodeDirectorySnapshottable.java:68)
      	at org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotManager.resetSnapshottable(SnapshotManager.java:151)
      	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.disallowSnapshot(FSNamesystem.java:5889)
      	at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.disallowSnapshot(NameNodeRpcServer.java:1128)
      	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.disallowSnapshot(ClientNamenodeProtocolServerSideTranslatorPB.java:943)
      	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:48089)
      	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:527)
      	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1033)
      	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1842)
      	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1838)
      	at java.security.AccessController.doPrivileged(Native Method)
      	at javax.security.auth.Subject.doAs(Subject.java:396)
      	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1489)
      	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1836)
      

      Snapshot diffs with non-existent snapshot paths

      chu-mbp:~ schu$ hdfs snapshotDiff / gibberish1 gibberish2
      2013-05-23 15:53:32.986 java[24877:1203] Unable to load realm info from SCDynamicStore
      2013-05-23 15:53:33,001 WARN  [main] util.NativeCodeLoader (NativeCodeLoader.java:<clinit>(62)) - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
      Exception in thread "main" org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotException: Cannot find the snapshot of directory / with name gibberish1
      	at org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectorySnapshottable.getSnapshotByName(INodeDirectorySnapshottable.java:389)
      	at org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectorySnapshottable.computeDiff(INodeDirectorySnapshottable.java:363)
      	at org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotManager.diff(SnapshotManager.java:358)
      	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getSnapshotDiffReport(FSNamesystem.java:6035)
      	at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getSnapshotDiffReport(NameNodeRpcServer.java:1153)
      	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getSnapshotDiffReport(ClientNamenodeProtocolServerSideTranslatorPB.java:985)
      	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:48095)
      	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:527)
      	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1033)
      	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1842)
      	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1838)
      	at java.security.AccessController.doPrivileged(Native Method)
      	at javax.security.auth.Subject.doAs(Subject.java:396)
      	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1489)
      	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1836)
      
      	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
      	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
      	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
      	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
      	at org.apache.hadoop.ipc.RemoteException.instantiateException(RemoteException.java:106)
      	at org.apache.hadoop.ipc.RemoteException.unwrapRemoteException(RemoteException.java:95)
      	at org.apache.hadoop.hdfs.DFSClient.getSnapshotDiffReport(DFSClient.java:2161)
      	at org.apache.hadoop.hdfs.DistributedFileSystem.getSnapshotDiffReport(DistributedFileSystem.java:990)
      	at org.apache.hadoop.hdfs.tools.snapshot.SnapshotDiff.main(SnapshotDiff.java:85)
      Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotException): Cannot find the snapshot of directory / with name gibberish1
      	at org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectorySnapshottable.getSnapshotByName(INodeDirectorySnapshottable.java:389)
      	at org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectorySnapshottable.computeDiff(INodeDirectorySnapshottable.java:363)
      	at org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotManager.diff(SnapshotManager.java:358)
      	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getSnapshotDiffReport(FSNamesystem.java:6035)
      	at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getSnapshotDiffReport(NameNodeRpcServer.java:1153)
      	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getSnapshotDiffReport(ClientNamenodeProtocolServerSideTranslatorPB.java:985)
      	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:48095)
      	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:527)
      	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1033)
      	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1842)
      	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1838)
      	at java.security.AccessController.doPrivileged(Native Method)
      	at javax.security.auth.Subject.doAs(Subject.java:396)
      	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1489)
      	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1836)
      
      	at org.apache.hadoop.ipc.Client.call(Client.java:1303)
      	at org.apache.hadoop.ipc.Client.call(Client.java:1255)
      	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:204)
      	at com.sun.proxy.$Proxy9.getSnapshotDiffReport(Unknown Source)
      	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
      	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      	at java.lang.reflect.Method.invoke(Method.java:597)
      	at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:163)
      	at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:82)
      	at com.sun.proxy.$Proxy9.getSnapshotDiffReport(Unknown Source)
      	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getSnapshotDiffReport(ClientNamenodeProtocolTranslatorPB.java:975)
      	at org.apache.hadoop.hdfs.DFSClient.getSnapshotDiffReport(DFSClient.java:2158)
      	... 2 more
      schu-mbp:~ schu$ 
      

        Attachments

        1. HDFS-4846.004.patch
          8 kB
          Jing Zhao
        2. HDFS-4846.003.patch
          6 kB
          Jing Zhao
        3. HDFS-4846.002.patch
          5 kB
          Jing Zhao
        4. HDFS-4846.001.patch
          4 kB
          Jing Zhao

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            People

            • Assignee:
              jingzhao Jing Zhao
              Reporter:
              schu Stephen Chu
            • Votes:
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              Watchers:
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              Dates

              • Created:
                Updated:
                Resolved: