ConfX created HDFS-17196:
----------------------------

             Summary: Overflow during getDatanodeReadTimeout
                 Key: HDFS-17196
                 URL: https://issues.apache.org/jira/browse/HDFS-17196
             Project: Hadoop HDFS
          Issue Type: Bug
    Affects Versions: 3.3.6
            Reporter: ConfX


Datanode read timeout equals to READ_TIMEOUT_EXTENSION * numNodes + 
`dfs.client.socket-timeout`. A large 
dfs.client.socket-timeout/numNodes/READ_TIMEOUT_EXTENSION will cause overflow.
 
To reproduce:
1. set `dfs.client.socket-timeout` to 2147483646
2. run `mvn surefire:test 
-Dtest=org.apache.hadoop.hdfs.server.namenode.ha.TestHASafeMode#testBlocksRemovedWhileInSafeModeEditsArriveFirst`
 
We create a PR that provides a fix by checking the read timeout calculation is 
at least 0.
 



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