[jira] Updated: (HBASE-1296) Bulk upload can overwhelm a datanode filling its disk because HDFS deletes lag

["stack (JIRA)" <ji...@apache.org>]

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

stack updated HBASE-1296:
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    Comment: was deleted

(was: This happened to me about two weeks ago. Namenode was uncontactable -- so it appeared -- and it was all deleting all the time.)

> 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: Hadoop 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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