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  1. IMPALA
  2. IMPALA-5909

File handle cache causes HDFS to log excessive errors when trying to unbuffer files

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: Impala 2.10.0
    • Fix Version/s: Impala 2.12.0
    • Component/s: Backend
    • Labels:
    • Epic Color:
      ghx-label-1

      Description

      On a few different clusters I've seen a lot of errors like this in the logs:

      org/apache/hadoop/fs/FSDataInputStream#unbuffer failed: error:
      UnsupportedOperationException: this stream does not support unbuffering.java.lang.UnsupportedOperationException: this stream does not support unbuffering.
              at org.apache.hadoop.fs.FSDataInputStream.unbuffer(FSDataInputStream.java:233)
      

      It doesn't seem harmful but adds a lot of noise to the logs for a non-error condition.

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              • Assignee:
                joemcdonnell Joe McDonnell
                Reporter:
                tarmstrong Tim Armstrong
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                • Created:
                  Updated:
                  Resolved: