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From Chandrashekhar Kotekar <shekhar.kote...@gmail.com>
Subject HBase copyTable stuck at map 100% reduce 0%
Date Sat, 02 May 2015 09:56:56 GMT
Hi,

I am copying table from primary cluster to backup cluster using copyTable
command but m-r job spawned by this command is stuck at map "100% reduce
0%".

Command used is :  hbase org.apache.hadoop.hbase.mapreduce.CopyTable
-Dhbase.client.scanner.caching=100 --peer.adr=target-nn1:/hbase

Here is some part of  the logs where job is stuck since last 15 minutes.

15/05/02 09:49:17 INFO mapreduce.JobSubmitter: number of splits:1
15/05/02 09:49:17 INFO Configuration.deprecation: io.bytes.per.checksum is
deprecated. Instead, use dfs.bytes-per-checksum
15/05/02 09:49:17 INFO mapreduce.JobSubmitter: Submitting tokens for job:
job_1424936551928_0181
15/05/02 09:49:18 INFO impl.YarnClientImpl: Submitted application
application_1424936551928_0181
15/05/02 09:49:18 INFO mapreduce.Job: The url to track the job:
http://resource-manager:8088/proxy/application_1424936551928_0181/
15/05/02 09:49:18 INFO mapreduce.Job: Running job: job_1424936551928_0181
15/05/02 09:49:27 INFO mapreduce.Job: Job job_1424936551928_0181 running in
uber mode : false
15/05/02 09:49:27 INFO mapreduce.Job:  map 0% reduce 0%
15/05/02 09:49:40 INFO mapreduce.Job:  map 100% reduce 0%


Does anyone knows why this m-r job gets hang at reduce 0%? I am not able to
see m-r jobs logs also because this cluster is in VPC, can't reach yarn job
web UI.

Regards,
Chandrash3khar Kotekar
Mobile - +91 8600011455

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