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From "liang xie (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6871) HFileBlockIndex Write Error BlockIndex in HFile V2
Date Mon, 24 Sep 2012 10:17:07 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13461710#comment-13461710
] 

liang xie commented on HBASE-6871:
----------------------------------

Hi Feng, attached patch is not well-formed,  please refer to http://hbase.apache.org/book.html#submitting.patches
 to generate a valid diff file, thanks
                
> HFileBlockIndex Write Error BlockIndex in HFile V2
> --------------------------------------------------
>
>                 Key: HBASE-6871
>                 URL: https://issues.apache.org/jira/browse/HBASE-6871
>             Project: HBase
>          Issue Type: Bug
>          Components: HFile
>    Affects Versions: 0.94.1
>         Environment: redhat 5u4
>            Reporter: Feng Wang
>            Priority: Critical
>         Attachments: HBASE-6871.patch
>
>
> After writing some data, compaction and scan operation both failure, the exception message
is below:
> 2012-09-18 06:32:26,227 ERROR org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest:
Compaction failed regionName=hfile_test,,1347778722498.d220df43fb9d8af4633bd7f547613f9e.,
storeName=page_info, fileCount=7, fileSize=1.3m (188.0k, 188.0k, 188.0k, 188.0k, 188.0k, 185.8k,
223.3k), priority=9, time=45826250816757428java.io.IOException: Could not reseek StoreFileScanner[HFileScanner
for reader reader=hdfs://hadoopdev1.cm6:9000/hbase/hfile_test/d220df43fb9d8af4633bd7f547613f9e/page_info/b0f6118f58de47ad9d87cac438ee0895,
compression=lzo, cacheConf=CacheConfig:enabled [cacheDataOnRead=true] [cacheDataOnWrite=false]
[cacheIndexesOnWrite=false] [cacheBloomsOnWrite=false] [cacheEvictOnClose=false] [cacheCompressed=false],
firstKey=http://com.truereligionbrandjeans.www/Womens_Dresses/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Sweaters/pl/c/Womens_Sweaters/pl/c/Womens_Sweaters/pl/c/Womens_Sweaters/pl/c/Womens_Sweaters/pl/c/Womens_Sweaters/pl/c/Womens_Shirts/pl/c/Womens_Sweaters/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Sweaters/pl/c/Womens_Sweaters/pl/c/Womens_Shirts/pl/c/Womens_Shirts/pl/c/Womens_Sweaters/pl/c/Womens_Sweaters/pl/c/Womens_Sweaters/pl/c/Womens_Sweaters/pl/c/Womens_Sweaters/pl/c/4010.html/page_info:anchor_sig/1347764439449/DeleteColumn,
lastKey=http://com.trura.www//page_info:page_type/1347763395089/Put, avgKeyLen=776, avgValueLen=4,
entries=12853, length=228611, cur=http://com.truereligionbrandjeans.www/Womens_Exclusive_Details/pl/c/4970.html/page_info:is_deleted/1347764003865/Put/vlen=1/ts=0]
to key http://com.truereligionbrandjeans.www/Womens_Exclusive_Details/pl/c/4970.html/page_info:is_deleted/OLDEST_TIMESTAMP/Minimum/vlen=0/ts=0
>         at org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseek(StoreFileScanner.java:178)
       
>         at org.apache.hadoop.hbase.regionserver.NonLazyKeyValueScanner.doRealSeek(NonLazyKeyValueScanner.java:54)
       
>         at org.apache.hadoop.hbase.regionserver.KeyValueHeap.generalizedSeek(KeyValueHeap.java:299)
>         at org.apache.hadoop.hbase.regionserver.KeyValueHeap.reseek(KeyValueHeap.java:244)
       
>         at org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.java:521)
       
>         at org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:402)
>         at org.apache.hadoop.hbase.regionserver.Store.compactStore(Store.java:1570) 
      
>         at org.apache.hadoop.hbase.regionserver.Store.compact(Store.java:997)       

>         at org.apache.hadoop.hbase.regionserver.HRegion.compact(HRegion.java:1216)
>         at org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest.run(CompactionRequest.java:250)
       
>         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
       
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>         at java.lang.Thread.run(Thread.java:662)
> Caused by: java.io.IOException: Expected block type LEAF_INDEX, but got INTERMEDIATE_INDEX:
blockType=INTERMEDIATE_INDEX, onDiskSizeWithoutHeader=8514, uncompressedSizeWithoutHeader=131837,
prevBlockOffset=-1, dataBeginsWith=\x00\x00\x00\x9B\x00\x00\x00\x00\x00\x00\x03#\x00\x00\x050\x00\x00\x08\xB7\x00\x00\x0Cr\x00\x00\x0F\xFA\x00\x00\x120,
fileOffset=218942        at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.validateBlockType(HFileReaderV2.java:378)
>         at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:331)
       at org.apache.hadoop.hbase.io.hfile.HFileBlockIndex$BlockIndexReader.seekToDataBlock(HFileBlockIndex.java:213)
>         at org.apache.hadoop.hbase.io.hfile.HFileReaderV2$AbstractScannerV2.seekTo(HFileReaderV2.java:455)
>         at org.apache.hadoop.hbase.io.hfile.HFileReaderV2$AbstractScannerV2.reseekTo(HFileReaderV2.java:493)
       
>         at org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseekAtOrAfter(StoreFileScanner.java:242)
       
>         at org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseek(StoreFileScanner.java:167)
> After some debug works´╝îI found that when hfile closing, if the rootChunk is empty,
the only one curInlineChunk will upgrade to root chunk. But if the last block flushing make
curInlineChunk exceed max index block size, the root chunk(upgrade from curInlineChunk) will
be splited into intermediate index blocks, and the index level is set to 2. So when BlockIndexReader
read the root index, it expects the next level index block is leaf index(index level=2), but
the on disk index block is intermediate block, the error happened. 
> After I add some code to check curInlineChunk's size when rootChunk is empty in shouldWriteBlock(boolean
closing), this bug can be fixed.

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