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https://issues.apache.org/jira/browse/HDFS-17273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17794514#comment-17794514
 ] 

ASF GitHub Bot commented on HDFS-17273:
---------------------------------------

haiyang1987 commented on code in PR #6321:
URL: https://github.com/apache/hadoop/pull/6321#discussion_r1419926052


##########
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DataStreamer.java:
##########
@@ -934,14 +936,14 @@ void waitForAckedSeqno(long seqno) throws IOException {
             }
             try {
               dataQueue.wait(1000); // when we receive an ack, we notify on
-              long duration = Time.monotonicNow() - begin;
-              if (duration > writeTimeout) {
+              long duration = Time.monotonicNowNanos() - begin;

Review Comment:
   Get it , thanks @hfutatzhanghb comment.
   
   ```
   if (TimeUnit.NANOSECONDS.toMillis(duration) > writeTimeout) {
       LOG.error("No ack received, took {}ms (threshold={}ms). "
           + "File being written: {}, block: {}, "
           + "Write pipeline datanodes: {}.",
           TimeUnit.NANOSECONDS.toMillis(duration), writeTimeout, src, block, 
nodes);
       throw new InterruptedIOException("No ack received after " +
         TimeUnit.NANOSECONDS.toSeconds(duration) + "s and a timeout of " +
           TimeUnit.MILLISECONDS.toSeconds(writeTimeout) + "s");
   }
   ```
   how about it?





> Change the way of computing some local variables duration for better debugging
> ------------------------------------------------------------------------------
>
>                 Key: HDFS-17273
>                 URL: https://issues.apache.org/jira/browse/HDFS-17273
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: farmmamba
>            Assignee: farmmamba
>            Priority: Minor
>              Labels: pull-request-available
>




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