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https://issues.apache.org/jira/browse/HBASE-2087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12796283#action_12796283
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Jean-Daniel Cryans commented on HBASE-2087:
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Oh right I didn't see it like that. Yes we don't want to hold flushes for every
region, just those concerned.
> 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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