[jira] [Created] (HDFS-17476) fix: False positive "Observer Node is too far behind" due to long overflow.

["Jian Zhang (Jira)" <ji...@apache.org>]

Jian Zhang created HDFS-17476:
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             Summary: fix: False positive "Observer Node is too far behind" due to long overflow.
                 Key: HDFS-17476
                 URL: https://issues.apache.org/jira/browse/HDFS-17476
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Jian Zhang
            Assignee: Jian Zhang


In the code GlobalStateIdContext#receiveRequestState(), if clientStateId is a small negative number, clientStateId-serverStateId may be greater than 

（ESTIMATED_TRANSACTIONS_PER_SECOND due to overflow
                  * TimeUnit.MILLISECONDS.toSeconds(clientWaitTime)
                  * ESTIMATED_SERVER_TIME_MULTIPLIER）,

resulting in false positives that Observer Node is too far behind.

 



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