Append Mode Does Not Work ??

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This topic contains 2 replies, has 2 voices, and was last updated by  Stephen Bovy 1 year, 8 months ago.

  • Creator
  • #44431

    Stephen Bovy

    I am getting an error when trying to use Append Mode. HELP !!

    Open file in append mode:/tmp/appends
    hdfsOpenFile(/tmp/appends): FileSystem#append((Lorg/apache/hadoop/fs/Path;)Lorg/
    apache/hadoop/fs/FSDataOutputStream;) error:
    org.apache.hadoop.ipc.RemoteException: Append is not suppor
    ted. Please see the configuration parameter
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFile(FSName
    at org.apache.hadoop.hdfs.server.namenode.NameNode.append(
    at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
    at java.lang.reflect.Method.invoke(
    at org.apache.hadoop.ipc.RPC$
    at org.apache.hadoop.ipc.Server$Handler$
    at org.apache.hadoop.ipc.Server$Handler$
    at Method)
    at org.apache.hadoop.ipc.Server$

    at org.apache.hadoop.ipc.RPC$Invoker.invoke(
    at $Proxy1.append(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at $Proxy1.append(Unknown Source)
    at org.apache.hadoop.hdfs.DFSClient.append(
    at org.apache.hadoop.hdfs.DFSClient.append(
    at org.apache.hadoop.hdfs.DistributedFileSystem.append(DistributedFileSy
    at org.apache.hadoop.fs.FileSystem.append(
    Failed to open /tmp/appends for Append/writing!

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  • Author
  • #44837

    Stephen Bovy


    I am working with libhdfs , and I have ported it to compile and run on windows , and I was trying to use the test programs to verify that I did not break anything.

    Thus I was getting the above error when the “append” test was performed.

    I am testing with the 1.1.3 Windows package.

    By googling I discovered how to re-enable the broken “append” support and therefore I was able to successfully complete the test suite.


    Robert Molina

    Hi Stephen,
    Are you using java apis for hdfs? At the moment, append in HDP 1.x for windows is a limitation. This feature is expected for HDP 2.0 for windows.


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