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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-1238) Under upload, region servers are unable to compact when loaded with hundreds of regions
Date Wed, 04 Mar 2009 18:57:59 GMT
Under upload, region servers are unable to compact when loaded with hundreds of regions
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                 Key: HBASE-1238
                 URL: https://issues.apache.org/jira/browse/HBASE-1238
             Project: Hadoop HBase
          Issue Type: Bug
          Components: regionserver
    Affects Versions: 0.19.0
            Reporter: Jean-Daniel Cryans
            Priority: Blocker
             Fix For: 0.19.1, 0.20.0


We have a situation where each region server is loaded with 100+ regions, most of them in
the same table. During a long upload of webpages, each memcache gets filled near equally fast
so that the global memcache limit is usually triggered before the max memcache size. Since
that emergency flush does not trigger compactions, the number of store files just keeps growing
until it fails on all kinds of errors.

We need a better story for this as this is a "normal" situation.

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