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From: "chunhui shen (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Commented] (HBASE-7135) Serializing hfileBlcok is incorrect
 for SlabCache
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    [ https://issues.apache.org/jira/browse/HBASE-7135?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13639963#comment-13639963 ] 

chunhui shen commented on HBASE-7135:
-------------------------------------

I have tested the slabcache previously and found the problem.

But it is fixed now.

Close it...
                
> Serializing hfileBlcok is incorrect for SlabCache
> -------------------------------------------------
>
>                 Key: HBASE-7135
>                 URL: https://issues.apache.org/jira/browse/HBASE-7135
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.94.2
>            Reporter: chunhui shen
>            Assignee: chunhui shen
>             Fix For: 0.95.1
>
>         Attachments: HBASE-7135.patch, HBASE-7135v2.patch
>
>
> 2012-11-07 08:35:36,082 ERROR org.apache.hadoop.hbase.io.hfile.slab.SingleSizeCache: Deserializer threw an exception. This may indicate a bug.
> java.io.IOException: Invalid HFile block magic: \x00\x00\x00\x00\x00\x00\x00\x00
> at org.apache.hadoop.hbase.io.hfile.BlockType.parse(BlockType.java:153)
> at org.apache.hadoop.hbase.io.hfile.BlockType.read(BlockType.java:164)
> at org.apache.hadoop.hbase.io.hfile.HFileBlock.<init>(HFileBlock.java:254)
> at org.apache.hadoop.hbase.io.hfile.HFileBlock$1.deserialize(HFileBlock.java:148)
> at org.apache.hadoop.hbase.io.hfile.HFileBlock$1.deserialize(HFileBlock.java:140)
> at org.apache.hadoop.hbase.io.hfile.slab.SingleSizeCache.getBlock(SingleSizeCache.java:166)
> at org.apache.hadoop.hbase.io.hfile.slab.SlabCache.getBlock(SlabCache.java:245)
> at org.apache.hadoop.hbase.io.hfile.DoubleBlockCache.getBlock(DoubleBlockCache.java:100)
> at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.getBlockFromCache(HFileReaderV2.java:267)
> at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:349)
> at org.apache.hadoop.hbase.io.hfile.HFileBlockIndex$BlockIndexReader.loadDataBlockWithScanInfo(HFileBlockIndex.java:257)
> at org.apache.hadoop.hbase.io.hfile.HFileReaderV2$AbstractScannerV2.seekTo(HFileReaderV2.java:498)
> at org.apache.hadoop.hbase.io.hfile.HFileReaderV2$AbstractScannerV2.seekTo(HFileReaderV2.java:522)
> at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:226)
> at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:145)

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