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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2087) The wait on compaction because "Too many store files" holds up all flushing
Date Mon, 04 Jan 2010 01:10:54 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12796057#action_12796057
] 

Andrew Purtell commented on HBASE-2087:
---------------------------------------

bq. Should we open a blanket issue in which we discuss undoing "compensating" changes now
hdfs has a working sync

+1

Like we did with the compaction limiting thread and region server "safe mode" after the transition
to 0.20.

> The wait on compaction because "Too many store files" holds up all flushing
> ---------------------------------------------------------------------------
>
>                 Key: HBASE-2087
>                 URL: https://issues.apache.org/jira/browse/HBASE-2087
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>
> The method MemStoreFlusher#checkStoreFileCount is called from flushRegion.  flushRegion
is called by MemStoreFlusher#run thread.  If the checkStoreFileCount finds too many store
files, it'll stick around waiting on a compaction to happen.  While its hanging, the MemStoreFlusher#run
is held up.  No other region can flush.  Meantime WALs will be rolling and memory will be
accumulating writes.

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