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Alejandro Abdelnur commented on MAPREDUCE-4942: ----------------------------------------------- [~acmurthy], AFAIK what we were saying regarding compatibility between Hadoop 1 and Hadoop 2 is: * applications written using Hadoop 1 mapred API are binary compatible. * applications written using Hadoop 1 mapreduce API are source compatible (required only recompilation). Without this patch, the second bullet item does not hold. IMO, we screwed up and we don't have clean way out. I understand keeping this patch impacts early adopters of YARN, and I'm not happy about it. Still, I think we have to consider how this affects the whole Hadoop user base and make a decision towards their interest. Because of this, I think we should keep this patch not to break people moving from Hadoop 1 to Hadoop 2. > mapreduce.Job has a bunch of methods that throw InterruptedException so its > incompatible with MR1 > ------------------------------------------------------------------------------------------------- > > Key: MAPREDUCE-4942 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-4942 > Project: Hadoop Map/Reduce > Issue Type: Sub-task > Components: mrv2 > Affects Versions: 2.0.2-alpha > Reporter: Robert Kanter > Assignee: Robert Kanter > Fix For: 2.0.5-beta > > Attachments: MAPREDUCE-4942.patch > > > The following methods in MR2's {{org.apache.hadoop.mapreduce.Job}} throw an > {{InterruptedException}} but don't in MR1, which makes them incompatible. > (Their Javadoc comments are also missing that they throw an > {{InterruptedException}} anyway) > I propose that we wrap the {{InterruptedException}} in a > {{RuntimeException}}. > {code} > public float setupProgress() throws IOException, InterruptedException > public float mapProgress() throws IOException, InterruptedException > public float reduceProgress() throws IOException, InterruptedException > public boolean isComplete() throws IOException, InterruptedException > public boolean isSuccessful() throws IOException, InterruptedException > public void killJob() throws IOException, InterruptedException > public void killTask(org.apache.hadoop.mapreduce.TaskAttemptID) throws > IOException, InterruptedException > public void failTask(org.apache.hadoop.mapreduce.TaskAttemptID) throws > IOException, InterruptedException > public Counters getCounters() throws IOException, InterruptedException > {code} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira