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From Otis Gospodnetić <otis.gospodne...@gmail.com>
Subject Re: Disk usage drops after RegionServer restart? (0.98)
Date Sat, 24 Oct 2015 03:08:16 GMT
Hi Ted,

0.98.6-cdh5.3.0

I did actually try to use lsof, but I didn't see anything unusual there.
Is there something specific I should look for?  Things owned by hbase user
or hdfs or yarn?  Hm, here, I don't really see anything interesting

$ sudo lsof| grep '/mnt' <== this is where all data lives and where disk
usage drops after RS restart

java       2654      hdfs    1w      REG             202,16     89487
44042562
/mnt/hadoop-hdfs/log/hadoop-hdfs-datanode-spm-hbase-slave11.prod.sematext.out
java       2654      hdfs    2w      REG             202,16     89487
44042562
/mnt/hadoop-hdfs/log/hadoop-hdfs-datanode-spm-hbase-slave11.prod.sematext.out
java       2654      hdfs  286w      REG             202,16 108938205
44044137
/mnt/hadoop-hdfs/log/hadoop-hdfs-datanode-spm-hbase-slave11.prod.sematext.log
java       2654      hdfs  289w      REG             202,16         0
44040203 /mnt/hadoop-hdfs/log/SecurityAuth-hdfs.audit
java       2654      hdfs  314w      REG             202,16    261462
44040213
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/dncp_block_verification.log.curr
java       2654      hdfs  316r      REG             202,16 134217728
44045060
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir74/subdir58/blk_1078606358
java       2654      hdfs  318r      REG             202,16 134217728
44057015
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir74/subdir224/blk_1078648930
java       2654      hdfs  319uW     REG             202,16        36
44042741 /mnt/hadoop-hdfs/data/in_use.lock
java       2654      hdfs  321r      REG             202,16   1048583
44042793
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir7/blk_1078658889_4918820.meta
java       2654      hdfs  330u      REG             202,16    352563
44048279
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/rbw/blk_1078675432_4935363.meta
java       2654      hdfs  333r      REG             202,16 134217728
44055769
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir9/blk_1078659381
java       2654      hdfs  335u      REG             202,16  45127168
44048273
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/rbw/blk_1078675432
java       2654      hdfs  340r      REG             202,16 134217728
44042791
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir7/blk_1078658889
java       2654      hdfs  343r      REG             202,16  13882119
44048053
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir71/blk_1078675385
java       2654      hdfs  345u      REG             202,16    485059
44048209
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/rbw/blk_1078675399_4935330.meta
java       2654      hdfs  346r      REG             202,16 134217728
44053723
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir4/blk_1078658098
java       2654      hdfs  347u      REG             202,16    371455
44047931
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/rbw/blk_1078675364_4935295.meta
java       2654      hdfs  348u      REG             202,16  47545282
44047927
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/rbw/blk_1078675364
java       2654      hdfs  354u      REG             202,16  20386405
44047875
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir8/blk_1078659266
java       2654      hdfs  355r      REG             202,16 134217728
44042762
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir74/subdir243/blk_1078653797
java       2654      hdfs  357r      REG             202,16 134217728
44042535
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir66/blk_1078674123
java       2654      hdfs  359u      REG             202,16      1839
44045445
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/rbw/blk_1078674506_4934437.meta
java       2654      hdfs  360u      REG             202,16    234130
44045440
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/rbw/blk_1078674506
java       2654      hdfs  363r      REG             202,16  20629437
44046774
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir17/blk_1078661533
java       2654      hdfs  369r      REG             202,16  18304945
44047599
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir71/blk_1078675270
java       2654      hdfs  370r      REG             202,16  62086413
44048199
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/rbw/blk_1078675399
java       2654      hdfs  379r      REG             202,16 134217728
44050035
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir3/blk_1078657983
java       2654      hdfs  390u      REG             202,16  20857780
44050270
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir8/blk_1078659267
java       2654      hdfs  408r      REG             202,16 115453375
44042299
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir66/blk_1078674120
java       2654      hdfs  415r      REG             202,16  20253192
44053520
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir60/blk_1078672624
java       2654      hdfs  423r      REG             202,16  18382878
44047547
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir71/blk_1078675257
java       2654      hdfs  424r      REG             202,16  19555559
44040692
/mnt/hadoop-hdfs/data/current/BP-282774069-10.123.212.150-1419335230604/current/finalized/subdir75/subdir65/blk_1078673801
bash      15005  ec2-user  cwd       DIR             202,16      4096
   2 /mnt
sudo      16055      root  cwd       DIR             202,16      4096
   2 /mnt
grep      16056  ec2-user  cwd       DIR             202,16      4096
   2 /mnt
sed       16057  ec2-user  cwd       DIR             202,16      4096
   2 /mnt
lsof      16058      root  cwd       DIR             202,16      4096
   2 /mnt
lsof      16059      root  cwd       DIR             202,16      4096
   2 /mnt
bash      18748     hbase    1w      REG             202,16     12843
 4980744
/mnt/hbase/log/hbase-hbase-regionserver-spm-hbase-slave11.prod.sematext.out
bash      18748     hbase    2w      REG             202,16     12843
 4980744
/mnt/hbase/log/hbase-hbase-regionserver-spm-hbase-slave11.prod.sematext.out
java      18761     hbase    1w      REG             202,16     12843
 4980744
/mnt/hbase/log/hbase-hbase-regionserver-spm-hbase-slave11.prod.sematext.out
java      18761     hbase    2w      REG             202,16     12843
 4980744
/mnt/hbase/log/hbase-hbase-regionserver-spm-hbase-slave11.prod.sematext.out
java      18761     hbase  338w      REG             202,16 117537786
 4980753
/mnt/hbase/log/hbase-hbase-regionserver-spm-hbase-slave11.prod.sematext.log
java      18761     hbase  339w      REG             202,16         0
 4980741 /mnt/hbase/log/SecurityAuth.audit
java      29057      yarn    1w      REG             202,16    130105
51380228
/mnt/hadoop-yarn/log/yarn-yarn-nodemanager-spm-hbase-slave11.prod.sematext.out
java      29057      yarn    2w      REG             202,16    130105
51380228
/mnt/hadoop-yarn/log/yarn-yarn-nodemanager-spm-hbase-slave11.prod.sematext.out
java      29057      yarn  286w      REG             202,16 103611255
51380852
/mnt/hadoop-yarn/log/yarn-yarn-nodemanager-spm-hbase-slave11.prod.sematext.log

I don't see anything big there...

Thanks,
Otis
--
Monitoring - Log Management - Alerting - Anomaly Detection
Solr & Elasticsearch Consulting Support Training - http://sematext.com/


On Fri, Oct 23, 2015 at 10:26 PM, Ted Yu <yuzhihong@gmail.com> wrote:

> Which specific release of 0.98 are you using ?
>
> Have you used lsof to see which files were being held onto ?
>
> Thanks
>
> On Fri, Oct 23, 2015 at 7:21 PM, Otis Gospodnetić <
> otis.gospodnetic@gmail.com> wrote:
>
> > Hello,
> >
> > Is/was there a known issue with HBase 0.98 "holding onto" files?
> >
> > We noticed the used disk space metric going up, up and up and we could
> not
> > stop it with major compaction.
> > But we noticed that if we restart a RegionServer 2 things happen:
> > 1) its disk usage immediately drops a lot
> > 2) the disk usage of other RegionServers drops some as well
> >
> > Have a look at this chart:
> >   https://apps.sematext.com/spm-reports/s/Ssy4ViFGHq
> >
> > At 1:54 we restarted the first RS (blue line)
> > At 2:03 we restarted the second RS (dark green line)
> >
> > Is/was this a known HBase 0.98 issue?
> >
> > Thanks,
> > Otis
> > --
> > Monitoring - Log Management - Alerting - Anomaly Detection
> > Solr & Elasticsearch Consulting Support Training - http://sematext.com/
> >
>

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