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From "Devaraj K (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2264) Job status exceeds 100% in some cases
Date Tue, 22 Mar 2011 16:43:05 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13009708#comment-13009708
] 

Devaraj K commented on MAPREDUCE-2264:
--------------------------------------

Hi Ravi,

I am also facing the same problem. Reduce tasks progress is going more than 100% when the
reduce input size is high. 

{code:title=Merger.java|borderStyle=solid}
    private void adjustPriorityQueue(Segment<K, V> reader) throws IOException{
      long startPos = reader.getPosition();
      boolean hasNext = reader.next();
      long endPos = reader.getPosition();
      totalBytesProcessed += endPos - startPos;
      mergeProgress.set(totalBytesProcessed * progPerByte);
      if (hasNext) {
        adjustTop();
      } else {
        pop();
        reader.close();
      }{code} 

Here the totalBytesProcessed is becoming more than the totalBytes and (totalBytesProcessed
* progPerByte) is coming more than 1. 

I am using the 0.20.2 version and I have HADOOP-5210 ,HADOOP-5572 patches also in the code.
Please check the screenshot attached.

> Job status exceeds 100% in some cases 
> --------------------------------------
>
>                 Key: MAPREDUCE-2264
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2264
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>            Reporter: Adam Kramer
>
> I'm looking now at my jobtracker's list of running reduce tasks. One of them is 120.05%
complete, the other is 107.28% complete.
> I understand that these numbers are estimates, but there is no case in which an estimate
of 100% for a non-complete task is better than an estimate of 99.99%, nor is there any case
in which an estimate greater than 100% is valid.
> I suggest that whatever logic is computing these set 99.99% as a hard maximum.

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