[ http://issues.apache.org/jira/browse/HADOOP-263?page=comments#action_12425441 ] Sanjay Dahiya commented on HADOOP-263: --------------------------------------
Here is what I am thinking for this. We add an extra field (timestamp) in org.apache.hadoop.mapred.TaskStatus. The timestamp gets TaskTracker.TaskInprogress.reportProgress(), when a task reports progress. As part of Task the timestamp is updated in Progress.set(), Progress.setStatus() and complete(). The timestamp is sent over to TaskTracker over RPC along with status. Another option is to update the timestamp when TaskTracker gets the progress report, without making any change to the Task. But sending timestamp over RPC gives a more accurate timestamp of the last progress update. > task status should include timestamps for when a job transitions > ---------------------------------------------------------------- > > Key: HADOOP-263 > URL: http://issues.apache.org/jira/browse/HADOOP-263 > Project: Hadoop > Issue Type: Improvement > Components: mapred > Affects Versions: 0.2.1 > Reporter: Owen O'Malley > Assigned To: Sanjay Dahiya > Fix For: 0.5.0 > > > It would help users to understand what happened if the task status included > information about when the task transitioned: > Map: > started > finished > Reduce: > started > shuffle finished > sort finished > finished -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
