This is a bug in 0.21. MAPREDUCE-1905 (
https://issues.apache.org/jira/browse/MAPREDUCE-1905) is open for this.
On 9/21/10 4:29 PM, Marc Sturlese marc.sturl...@gmail.com wrote:
I am using hadoop 0.21
I have a reducer task wich takes more time to finish that the
mapreduce.task.timeout so it's being killed:
Task attempt_201009211103_0001_r_00_0 failed to report status for 602
seconds. Killing!
I have implemented a thread which is suposed to send progress and update the
status with an incremented counter but it seems not to be working. The
attempt is killed anyway.
I have tried an even simpler example: Not to use a thread and create an
infinite loop in the reducer which updates the status and sends progress on
each iteration... but the attempt keeps being killed:
@Override
public void reduce(Text keyName, IterableText paths, Context context)
throws IOException, InterruptedException {
while(true) {
context.getCounter(COUNTER_ADS.total_ads).increment(1L) ;
context.setStatus(+context.getCounter(COUNTER_ADS.total_ads)) ;
context.progress();
}
context.write(new Text(done!), NullWritable.get());
}
I have even tryed to use TaskInputOutputContext insted of stright Context:
@Override
public void reduce(Text keyName, IterableText paths, Context context)
throws IOException, InterruptedException {
TaskInputOutputContext tac = (TaskInputOutputContext)context;
while(true) {
tac.getCounter(COUNTER_ADS.total_ads).increment(1L) ;
tac.setStatus(+context.getCounter(COUNTER_ADS.total_ads)) ;
tac.progress();
}
context.write(new Text(done!), NullWritable.get());
}
Can anyone tell me what else could I try or what am I doing wrong? I am
really stuck on this problem and have no idea what else to do...
Thanks in advance
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