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Date: Thu, 8 Oct 2009 14:07:31 -0700 (PDT)
From: "ryan rawson (JIRA)" <jira@apache.org>
To: hbase-dev@hadoop.apache.org
Subject: [jira] Commented: (HBASE-1777) column length is not checked before
 saved to memstore
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    [ https://issues.apache.org/jira/browse/HBASE-1777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12763697#action_12763697 ] 

ryan rawson commented on HBASE-1777:
------------------------------------

this one is not as straightforward as it seems, the mainline code in Put and KeyValue checks the row length, thus this is "impossible". Must be one of the other code paths somewhere...

> column length is not checked before saved to memstore
> -----------------------------------------------------
>
>                 Key: HBASE-1777
>                 URL: https://issues.apache.org/jira/browse/HBASE-1777
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 0.20.0
>            Reporter: Billy Pearson
>            Assignee: Amandeep Khurana
>             Fix For: 0.21.0
>
>
> I added some debuging to line 511 in HFile.java and found that the column is causing my problem it was > max size
> we should check this before saving the record to memstore
> As of 0.20.0-RC2 the server dies and cause the hlogs to be read again by the next region server that gets the region in the end it cause the whole cluster to go down sense the bad data is in the hlog at this point.
> {code}
> 2009-08-18 12:54:16,572 FATAL 
> org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Replay of hlog 
> required. Forcing server shutdown
> org.apache.hadoop.hbase.DroppedSnapshotException: region: 
> webdata,http:\x2F\x2Fanaal-genomen.isporno.nl\x2F,1250569930062
>         at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:950)
>         at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:843)
>         at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:241)
>         at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.run(MemStoreFlusher.java:149)
> Caused by: java.io.IOException: Key length 183108 > 65536
>         at org.apache.hadoop.hbase.io.hfile.HFile$Writer.checkKey(HFile.java:511)
>         at org.apache.hadoop.hbase.io.hfile.HFile$Writer.append(HFile.java:479)
>         at org.apache.hadoop.hbase.io.hfile.HFile$Writer.append(HFile.java:447)
>         at org.apache.hadoop.hbase.regionserver.Store.internalFlushCache(Store.java:525)
>         at org.apache.hadoop.hbase.regionserver.Store.flushCache(Store.java:489)
>         at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:935)
>         ... 3 more
> {code}

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