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  1. CDH (READ-ONLY)
  2. DISTRO-377

The Datanode block scanner thread may fail on startup.

          Details

          • Type: Bug
          • Status: Resolved
          • Priority: Major
          • Resolution: Fixed
          • Affects Version/s: CDH3u3
          • Fix Version/s: CDH3u3
          • Component/s: HDFS
          • Labels:
            None
          • Release Note:
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            In order to use this update all datanode and namenode packages in the cluster need to be updated to the new version. If you have pinned your repository to update 3, all server nodes in the cluster need to be updated. This change does not affect client / server compatibility.
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            In order to use this update all datanode and namenode packages in the cluster need to be updated to the new version. If you have pinned your repository to update 3, all server nodes in the cluster need to be updated. This change does not affect client / server compatibility.

            Description

            The Datanode block scanner thread may fail on Datanode startup. This is indicated by the following warning in the Datanode log:

            Feb 9, 6:55:58 PM WARN org.apache.hadoop.hdfs.server.datanode.DataBlockScanner
RuntimeException during DataBlockScanner.run() : null  java.util.concurrent.RejectedExecutionException

            The block scanner thread is a background thread that checks for silent corruption / bit rot of HDFS data blocks. Blocks are checked when they are accessed, so this functionality is useful for checking blocks that are not frequently accessed.

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                  • Assignee:
                    eli Eli Collins
                    Reporter:
                    eli Eli Collins
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                    • Created:
                      Updated:
                      Resolved: