Wei-Chiu Chuang created HDFS-10876:

             Summary: Dispatcher#dispatch should log IOException stacktrace
                 Key: HDFS-10876
                 URL: https://issues.apache.org/jira/browse/HDFS-10876
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: balancer & mover
    Affects Versions: 2.6.0
            Reporter: Wei-Chiu Chuang
            Priority: Trivial

This error logging should be improved. A warning log should record the 
stacktrace as well.
try {
} catch (IOException e) {
        LOG.warn("Failed to move " + this + ": " + e.getMessage());

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