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From "Manish Shah (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1686) major compaction can create empty store files, causing AIOOB when trying to read
Date Fri, 24 Jul 2009 01:27:14 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1686?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12734864#action_12734864
] 

Manish Shah commented on HBASE-1686:
------------------------------------

I'm curious about why this is caused by a table only having delete operations applied to it.
 In our application we are not performing any deletes.  The functionality is that we do a
GET on a row, update the contents of the record, and then a PUT back into the same table.
 Am i missing something? What are you referring to by "table full of deletes" ?

> major compaction can create empty store files, causing AIOOB when trying to read
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-1686
>                 URL: https://issues.apache.org/jira/browse/HBASE-1686
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.20.0
>            Reporter: ryan rawson
>            Priority: Blocker
>             Fix For: 0.20.0
>
>
> here is the backtrace:
> Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
>         at org.apache.hadoop.hbase.io.hfile.HFile$Reader.getFirstKey(HFile.java:991)
>         at org.apache.hadoop.hbase.regionserver.StoreFileGetScan.getStoreFile(StoreFileGetScan.java:84)
>         at org.apache.hadoop.hbase.regionserver.StoreFileGetScan.get(StoreFileGetScan.java:65)
>         at org.apache.hadoop.hbase.regionserver.Store.get(Store.java:1548)
>         at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:2263)
>         at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:2252)
>         at org.apache.hadoop.hbase.regionserver.HRegionServer.get(HRegionServer.java:1739)
> This can happen if your table only has deletes, and everything evaporates during a major
compaction.

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