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From "Harsh J (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11012) Unnecessary INFO logging on DFSClients for InvalidToken
Date Fri, 14 Oct 2016 07:41:20 GMT
Harsh J created HDFS-11012:

             Summary: Unnecessary INFO logging on DFSClients for InvalidToken
                 Key: HDFS-11012
                 URL: https://issues.apache.org/jira/browse/HDFS-11012
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: fs
    Affects Versions: 2.5.0
            Reporter: Harsh J
            Assignee: Harsh J
            Priority: Minor

In situations where a DFSClient would receive an InvalidToken exception (as described at [1]),
a single retry is automatically made (as observed at [2]). However, we still print an INFO
message into the DFSClient's logger even though the message is expected in some scenarios.
This should ideally be a DEBUG level message to avoid confusion.

If the retry or the retried attempt fails, the final clause handles it anyway and prints out
a proper WARN (as seen at [3]) so the INFO is unnecessary.

[1] - https://github.com/apache/hadoop/blob/release-2.7.0/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java#L1330-L1356
[2] - https://github.com/apache/hadoop/blob/release-2.7.0/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java#L649-L651
and https://github.com/apache/hadoop/blob/release-2.7.0/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java#L1163-L1170
[3] - https://github.com/apache/hadoop/blob/release-2.7.0/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java#L652-L658
and https://github.com/apache/hadoop/blob/release-2.7.0/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java#L1171-L1177

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