Yes it goes away when I comment the map output compression. On Tue, Jul 1, 2014 at 6:38 PM, M. Dale <[email protected]> wrote:
> That looks right. Do you consistently get the error below and the total > job fails? Does it go away when you comment out the map compression? > > > On 07/01/2014 03:23 PM, Mohit Anchlia wrote: > > I am trying to compress mapoutput but when I add the following code I get > errors. Is there anything wrong that you can point me to? > > > conf.setBoolean( > > "mapreduce.map.output.compress", *true*); > > conf.setClass( > > "mapreduce.map.output.compress.codec", GzipCodec.*class*, > > CompressionCodec. > > *class*); > > 14/07/01 22:21:47 INFO mapreduce.Job: Task Id : > attempt_1404239414989_0008_r_000000_1, Status : FAILED > > Error: org.apache.hadoop.mapreduce.task.reduce.Shuffle$ShuffleError: error > in shuffle in fetcher#1 > > at org.apache.hadoop.mapreduce.task.reduce.Shuffle.run(Shuffle.java:134) > > at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:376) > > at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168) > > at java.security.AccessController.doPrivileged(Native Method) > > at javax.security.auth.Subject.doAs(Subject.java:415) > > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548) > > at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:163) > > Caused by: java.io.IOException: Exceeded MAX_FAILED_UNIQUE_FETCHES; > bailing-out. > > at > org.apache.hadoop.mapreduce.task.reduce.ShuffleSchedulerImpl.checkReducerHealth(ShuffleSchedulerImpl.java:323) > > at > org.apache.hadoop.mapreduce.task.reduce.ShuffleSchedulerImpl.copyFailed(ShuffleSchedulerImpl.java:245) > > at > org.apache.hadoop.mapreduce.task.reduce.Fetcher.copyFromHost(Fetcher.java:347) > > at org.apache.hadoop.mapreduce.task.reduce.Fetcher.run(Fetcher.java:165) > > >
