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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-1296) Bulk upload can overwhelm a datanode filling its disk because HDFS deletes lag
Date Wed, 16 Jul 2014 21:49:05 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1296?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell resolved HBASE-1296.
-----------------------------------

    Resolution: Cannot Reproduce

Reopen or file new issue if still a factor with modern Hadoop and HBase versions

> Bulk upload can overwhelm a datanode filling its disk because HDFS deletes lag
> ------------------------------------------------------------------------------
>
>                 Key: HBASE-1296
>                 URL: https://issues.apache.org/jira/browse/HBASE-1296
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>
> From a private mail with Jérôme Thièvre:
> "Two times I got the same kind of problems described by schubert zhang in the thread
*HDFS unbalance issue. (HBase over HDFS). *The first time, I found one of my regionserver
 with a full disk, whereas the others were at 10% of their capacity. I saw a lot of move file
command at hadoop level from the full regionserver to others, but after check on the hdfs,
I can see that hadoop copies the file but fails to delete it.  As the regionserver disk was
full, it didn't work anymore, even after hadoop and hbase restart. I had to delete all the
data.
> "The second time this problem occurs I stopped the row insertion process before the disk
was full. After hadoop and hbase restart, hadoop has deleted the files and the system was
operational.
> It seems that in some cases where the system is heavily loaded with continuous writes
and compactions, hadoop can't remove files."



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