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From Glen Arrowsmith <garrowsm...@halfbrick.com>
Subject Exceeded limits on number of counters
Date Tue, 02 Jul 2013 06:43:34 GMT
Hi,
I'm getting an error on a map reduce task that use to work just fine for a few weeks.

Exceeded limits on number of counters - Counters=120 Limit=120

The full stderr output is at the bottom.

I'm using Amazon's Elastic MapReduce.
The following command starts the job
elastic-mapreduce --create --name REGISTER table to S3 v2" --num-instances 6 --with-supported-products
mapr-m5 --instance-type m1.xlarge --hive-script --arg s3://censored/dynamo-to-s3-v2.h --args
-d,OUTPATH=s3://censored/out/,-d,INTABLE="REGISTER"

>From what I've read you can't change the counter limit without recompiling.

Originally I had "fixed" this problem by upgrading from standard map reduce instances to mapr-m5
instances but that stopped working now for some reason.

Thanks very much in advance for your help

Glen Arrowsmith
Systems Architect


/mnt/var/lib/hadoop/steps/2/./hive-script:326: warning: Insecure world writable dir /home/hadoop/bin
in PATH, mode 040757
Logging initialized using configuration in file:/home/hadoop/.versions/hive-0.8.1/conf/hive-log4j.properties
Hive history file=/mnt/var/lib/hive_081/tmp/history/hive_job_log_hadoop_201307020009_133883985.txt
OK
[snip]
Time taken: 0.389 seconds
OK
Time taken: 0.382 seconds
Total MapReduce jobs = 12
Launching Job 1 out of 12
Number of reduce tasks not specified. Defaulting to jobconf value of: 10
In order to change the average load for a reducer (in bytes):
  set hive.exec.reducers.bytes.per.reducer=<number>
In order to limit the maximum number of reducers:
  set hive.exec.reducers.max=<number>
In order to set a constant number of reducers:
  set mapred.reduce.tasks=<number>
Starting Job = job_201307020007_0001, Tracking URL = http://ip-10-151-78-231.ec2.internal:9100/jobdetails.jsp?jobid=job_201307020007_0001
Kill Command = /opt/mapr/hadoop/hadoop-0.20.2/bin/../bin/hadoop job  -Dmapred.job.tracker=maprfs:///
-kill job_201307020007_0001
Hadoop job information for Stage-12: number of mappers: 23; number of reducers: 10
2013-07-02 00:09:30,325 Stage-12 map = 0%,  reduce = 0%
org.apache.hadoop.mapred.Counters$CountersExceededException: Error: Exceeded limits on number
of counters - Counters=120 Limit=120
                at org.apache.hadoop.mapred.Counters$Group.getCounterForName(Counters.java:318)
                at org.apache.hadoop.mapred.Counters.findCounter(Counters.java:439)
                at org.apache.hadoop.mapred.Counters.getCounter(Counters.java:503)
                at org.apache.hadoop.hive.ql.exec.Operator.updateCounters(Operator.java:1150)
                at org.apache.hadoop.hive.ql.exec.ExecDriver.updateCounters(ExecDriver.java:1281)
                at org.apache.hadoop.hive.ql.exec.HadoopJobExecHelper.updateCounters(HadoopJobExecHelper.java:85)
                at org.apache.hadoop.hive.ql.exec.HadoopJobExecHelper.progress(HadoopJobExecHelper.java:312)
                at org.apache.hadoop.hive.ql.exec.HadoopJobExecHelper.progress(HadoopJobExecHelper.java:685)
                at org.apache.hadoop.hive.ql.exec.ExecDriver.execute(ExecDriver.java:494)
                at org.apache.hadoop.hive.ql.exec.MapRedTask.execute(MapRedTask.java:136)
                at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:133)
                at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:57)
                at org.apache.hadoop.hive.ql.exec.TaskRunner.run(TaskRunner.java:47)
Ended Job = job_201307020007_0001 with exception 'org.apache.hadoop.mapred.Counters$CountersExceededException(Error:
Exceeded limits on number of counters - Counters=120 Limit=120)'
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.MapRedTask
Command exiting with ret '255'

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