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Posted to issues@hbase.apache.org by "Gopinathan A (JIRA)" <ji...@apache.org> on 2012/05/18 16:03:06 UTC

[jira] [Created] (HBASE-6048) Table Scan is failing if offheap cache enabled

Gopinathan A created HBASE-6048:
-----------------------------------

             Summary: Table Scan is failing if offheap cache enabled
                 Key: HBASE-6048
                 URL: https://issues.apache.org/jira/browse/HBASE-6048
             Project: HBase
          Issue Type: Bug
    Affects Versions: 0.94.0
            Reporter: Gopinathan A


Table Scan is failing if offheap cache enabled.

{noformat}
2012-05-18 20:03:38,446 DEBUG org.apache.hadoop.hbase.io.hfile.HFileWriterV2: Initialized with CacheConfig:enabled [cacheDataOnRead=true] [cacheDataOnWrite=false] [cacheIndexesOnWrite=false] [cacheBloomsOnWrite=false] [cacheEvictOnClose=false] [cacheCompressed=false]
2012-05-18 20:03:38,446 INFO org.apache.hadoop.hbase.regionserver.StoreFile: Delete Family Bloom filter type for hdfs://10.18.40.217:9000/hbase/ufdr/1d4656fd417a07c9171a38b8f4d08510/.tmp/03742024b28f443bb63cfc338d4ca422: CompoundBloomFilterWriter
2012-05-18 20:04:25,576 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction started; Attempting to free 120.57 MB of total=1020.57 MB
2012-05-18 20:04:25,655 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction completed; freed=120.82 MB, total=907.89 MB, single=1012.11 MB, multi=6.12 MB, memory=0 KB
2012-05-18 20:04:25,733 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
java.lang.IllegalStateException: Schema metrics requested before table/CF name initialization: {"tableName":"null","cfName":"null"}
	at org.apache.hadoop.hbase.regionserver.metrics.SchemaConfigured.getSchemaMetrics(SchemaConfigured.java:182)
	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.updateSizeMetrics(LruBlockCache.java:310)
	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:274)
	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:293)
	at org.apache.hadoop.hbase.io.hfile.DoubleBlockCache.getBlock(DoubleBlockCache.java:102)
	at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:296)
	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$AbstractScannerV2.seekTo(HFileReaderV2.java:475)
	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:226)
	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:145)
	at org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:130)
	at org.apache.hadoop.hbase.regionserver.Store.getScanner(Store.java:2001)
	at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:3274)
	at org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:1604)
	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1596)
	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1572)
	at org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:2310)
	at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:364)
	at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1376)
2012-05-18 20:04:25,828 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
{noformat}

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[jira] [Commented] (HBASE-6048) Table Scan is failing if offheap cache enabled

Posted by "chunhui shen (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/HBASE-6048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13493773#comment-13493773 ] 

chunhui shen commented on HBASE-6048:
-------------------------------------

[~ram_krish]

We also catch this problem and created HBASE-7136, but I don't found the schemaMetrics in Trunk, so close it
                
> Table Scan is failing if offheap cache enabled
> ----------------------------------------------
>
>                 Key: HBASE-6048
>                 URL: https://issues.apache.org/jira/browse/HBASE-6048
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.94.0
>            Reporter: Gopinathan A
>            Assignee: ramkrishna.s.vasudevan
>
> Table Scan is failing if offheap cache enabled.
> {noformat}
> 2012-05-18 20:03:38,446 DEBUG org.apache.hadoop.hbase.io.hfile.HFileWriterV2: Initialized with CacheConfig:enabled [cacheDataOnRead=true] [cacheDataOnWrite=false] [cacheIndexesOnWrite=false] [cacheBloomsOnWrite=false] [cacheEvictOnClose=false] [cacheCompressed=false]
> 2012-05-18 20:03:38,446 INFO org.apache.hadoop.hbase.regionserver.StoreFile: Delete Family Bloom filter type for hdfs://10.18.40.217:9000/hbase/ufdr/1d4656fd417a07c9171a38b8f4d08510/.tmp/03742024b28f443bb63cfc338d4ca422: CompoundBloomFilterWriter
> 2012-05-18 20:04:25,576 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction started; Attempting to free 120.57 MB of total=1020.57 MB
> 2012-05-18 20:04:25,655 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction completed; freed=120.82 MB, total=907.89 MB, single=1012.11 MB, multi=6.12 MB, memory=0 KB
> 2012-05-18 20:04:25,733 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> java.lang.IllegalStateException: Schema metrics requested before table/CF name initialization: {"tableName":"null","cfName":"null"}
> 	at org.apache.hadoop.hbase.regionserver.metrics.SchemaConfigured.getSchemaMetrics(SchemaConfigured.java:182)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.updateSizeMetrics(LruBlockCache.java:310)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:274)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:293)
> 	at org.apache.hadoop.hbase.io.hfile.DoubleBlockCache.getBlock(DoubleBlockCache.java:102)
> 	at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:296)
> 	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$AbstractScannerV2.seekTo(HFileReaderV2.java:475)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:226)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:145)
> 	at org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:130)
> 	at org.apache.hadoop.hbase.regionserver.Store.getScanner(Store.java:2001)
> 	at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:3274)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:1604)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1596)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1572)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:2310)
> 	at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:364)
> 	at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1376)
> 2012-05-18 20:04:25,828 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> {noformat}

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[jira] [Updated] (HBASE-6048) Table Scan is failing if offheap cache enabled

Posted by "ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HBASE-6048?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ramkrishna.s.vasudevan updated HBASE-6048:
------------------------------------------

    Priority: Major  (was: Critical)

My intention behind marking critical was though we have claimed it to be an experimental feature on enabling it if scan fails then i thought its good to have a closer look.
I will lower the priority of it.  May be i will spend some time in finding out the root cause of it and based on that we can come up with some information to say that this feature is experimental and so and so things could be the possible problems that one could run into.
                
> Table Scan is failing if offheap cache enabled
> ----------------------------------------------
>
>                 Key: HBASE-6048
>                 URL: https://issues.apache.org/jira/browse/HBASE-6048
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.94.0
>            Reporter: Gopinathan A
>            Assignee: ramkrishna.s.vasudevan
>
> Table Scan is failing if offheap cache enabled.
> {noformat}
> 2012-05-18 20:03:38,446 DEBUG org.apache.hadoop.hbase.io.hfile.HFileWriterV2: Initialized with CacheConfig:enabled [cacheDataOnRead=true] [cacheDataOnWrite=false] [cacheIndexesOnWrite=false] [cacheBloomsOnWrite=false] [cacheEvictOnClose=false] [cacheCompressed=false]
> 2012-05-18 20:03:38,446 INFO org.apache.hadoop.hbase.regionserver.StoreFile: Delete Family Bloom filter type for hdfs://10.18.40.217:9000/hbase/ufdr/1d4656fd417a07c9171a38b8f4d08510/.tmp/03742024b28f443bb63cfc338d4ca422: CompoundBloomFilterWriter
> 2012-05-18 20:04:25,576 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction started; Attempting to free 120.57 MB of total=1020.57 MB
> 2012-05-18 20:04:25,655 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction completed; freed=120.82 MB, total=907.89 MB, single=1012.11 MB, multi=6.12 MB, memory=0 KB
> 2012-05-18 20:04:25,733 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> java.lang.IllegalStateException: Schema metrics requested before table/CF name initialization: {"tableName":"null","cfName":"null"}
> 	at org.apache.hadoop.hbase.regionserver.metrics.SchemaConfigured.getSchemaMetrics(SchemaConfigured.java:182)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.updateSizeMetrics(LruBlockCache.java:310)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:274)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:293)
> 	at org.apache.hadoop.hbase.io.hfile.DoubleBlockCache.getBlock(DoubleBlockCache.java:102)
> 	at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:296)
> 	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$AbstractScannerV2.seekTo(HFileReaderV2.java:475)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:226)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:145)
> 	at org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:130)
> 	at org.apache.hadoop.hbase.regionserver.Store.getScanner(Store.java:2001)
> 	at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:3274)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:1604)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1596)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1572)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:2310)
> 	at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:364)
> 	at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1376)
> 2012-05-18 20:04:25,828 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> {noformat}

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[jira] [Commented] (HBASE-6048) Table Scan is failing if offheap cache enabled

Posted by "ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/HBASE-6048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13278817#comment-13278817 ] 

ramkrishna.s.vasudevan commented on HBASE-6048:
-----------------------------------------------

Also we get the following trace also while scanning
{code}
2012-05-18 10:38:29,709 ERROR org.apache.hadoop.hbase.io.hfile.HFileReaderV2: Current pos = 655578; currKeyLen = 38; currValLen = 800; block limit = 655578; HFile name = 5325593bcaba4a8ba6f61f026abb82a9; currBlock currBlockOffset = 222963500
2012-05-18 10:38:29,709 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: 
java.lang.IllegalArgumentException
	at java.nio.Buffer.position(Buffer.java:218)
	at org.apache.hadoop.hbase.io.hfile.HFileReaderV2$ScannerV2.next(HFileReaderV2.java:630)
	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScanner.java:130)
	at org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java:95)
	at org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:406)
	at org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java:127)
	at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextInternal(HRegion.java:3354)
	at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.next(HRegion.java:3310)
	at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.next(HRegion.java:3327)
	at org.apache.hadoop.hbase.regionserver.HRegionServer.next(HRegionServer.java:2393)
	at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:364)
	at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1376)

{code}
                
> Table Scan is failing if offheap cache enabled
> ----------------------------------------------
>
>                 Key: HBASE-6048
>                 URL: https://issues.apache.org/jira/browse/HBASE-6048
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.94.0
>            Reporter: Gopinathan A
>            Priority: Critical
>
> Table Scan is failing if offheap cache enabled.
> {noformat}
> 2012-05-18 20:03:38,446 DEBUG org.apache.hadoop.hbase.io.hfile.HFileWriterV2: Initialized with CacheConfig:enabled [cacheDataOnRead=true] [cacheDataOnWrite=false] [cacheIndexesOnWrite=false] [cacheBloomsOnWrite=false] [cacheEvictOnClose=false] [cacheCompressed=false]
> 2012-05-18 20:03:38,446 INFO org.apache.hadoop.hbase.regionserver.StoreFile: Delete Family Bloom filter type for hdfs://10.18.40.217:9000/hbase/ufdr/1d4656fd417a07c9171a38b8f4d08510/.tmp/03742024b28f443bb63cfc338d4ca422: CompoundBloomFilterWriter
> 2012-05-18 20:04:25,576 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction started; Attempting to free 120.57 MB of total=1020.57 MB
> 2012-05-18 20:04:25,655 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction completed; freed=120.82 MB, total=907.89 MB, single=1012.11 MB, multi=6.12 MB, memory=0 KB
> 2012-05-18 20:04:25,733 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> java.lang.IllegalStateException: Schema metrics requested before table/CF name initialization: {"tableName":"null","cfName":"null"}
> 	at org.apache.hadoop.hbase.regionserver.metrics.SchemaConfigured.getSchemaMetrics(SchemaConfigured.java:182)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.updateSizeMetrics(LruBlockCache.java:310)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:274)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:293)
> 	at org.apache.hadoop.hbase.io.hfile.DoubleBlockCache.getBlock(DoubleBlockCache.java:102)
> 	at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:296)
> 	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$AbstractScannerV2.seekTo(HFileReaderV2.java:475)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:226)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:145)
> 	at org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:130)
> 	at org.apache.hadoop.hbase.regionserver.Store.getScanner(Store.java:2001)
> 	at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:3274)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:1604)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1596)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1572)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:2310)
> 	at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:364)
> 	at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1376)
> 2012-05-18 20:04:25,828 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> {noformat}

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[jira] [Commented] (HBASE-6048) Table Scan is failing if offheap cache enabled

Posted by "stack (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/HBASE-6048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13279052#comment-13279052 ] 

stack commented on HBASE-6048:
------------------------------

I don't think this critical.  Off-heap cache needs more work for it to be made useable.  Until that is done my guess is that few use this feature.  This feature is experimental still (How do we make this more clear)?
                
> Table Scan is failing if offheap cache enabled
> ----------------------------------------------
>
>                 Key: HBASE-6048
>                 URL: https://issues.apache.org/jira/browse/HBASE-6048
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.94.0
>            Reporter: Gopinathan A
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Critical
>
> Table Scan is failing if offheap cache enabled.
> {noformat}
> 2012-05-18 20:03:38,446 DEBUG org.apache.hadoop.hbase.io.hfile.HFileWriterV2: Initialized with CacheConfig:enabled [cacheDataOnRead=true] [cacheDataOnWrite=false] [cacheIndexesOnWrite=false] [cacheBloomsOnWrite=false] [cacheEvictOnClose=false] [cacheCompressed=false]
> 2012-05-18 20:03:38,446 INFO org.apache.hadoop.hbase.regionserver.StoreFile: Delete Family Bloom filter type for hdfs://10.18.40.217:9000/hbase/ufdr/1d4656fd417a07c9171a38b8f4d08510/.tmp/03742024b28f443bb63cfc338d4ca422: CompoundBloomFilterWriter
> 2012-05-18 20:04:25,576 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction started; Attempting to free 120.57 MB of total=1020.57 MB
> 2012-05-18 20:04:25,655 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction completed; freed=120.82 MB, total=907.89 MB, single=1012.11 MB, multi=6.12 MB, memory=0 KB
> 2012-05-18 20:04:25,733 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> java.lang.IllegalStateException: Schema metrics requested before table/CF name initialization: {"tableName":"null","cfName":"null"}
> 	at org.apache.hadoop.hbase.regionserver.metrics.SchemaConfigured.getSchemaMetrics(SchemaConfigured.java:182)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.updateSizeMetrics(LruBlockCache.java:310)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:274)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:293)
> 	at org.apache.hadoop.hbase.io.hfile.DoubleBlockCache.getBlock(DoubleBlockCache.java:102)
> 	at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:296)
> 	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$AbstractScannerV2.seekTo(HFileReaderV2.java:475)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:226)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:145)
> 	at org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:130)
> 	at org.apache.hadoop.hbase.regionserver.Store.getScanner(Store.java:2001)
> 	at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:3274)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:1604)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1596)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1572)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:2310)
> 	at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:364)
> 	at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1376)
> 2012-05-18 20:04:25,828 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> {noformat}

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[jira] [Commented] (HBASE-6048) Table Scan is failing if offheap cache enabled

Posted by "chunhui shen (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/HBASE-6048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13493784#comment-13493784 ] 

chunhui shen commented on HBASE-6048:
-------------------------------------

Yes, 0.94 has this problem~~~
                
> Table Scan is failing if offheap cache enabled
> ----------------------------------------------
>
>                 Key: HBASE-6048
>                 URL: https://issues.apache.org/jira/browse/HBASE-6048
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.94.0
>            Reporter: Gopinathan A
>            Assignee: ramkrishna.s.vasudevan
>
> Table Scan is failing if offheap cache enabled.
> {noformat}
> 2012-05-18 20:03:38,446 DEBUG org.apache.hadoop.hbase.io.hfile.HFileWriterV2: Initialized with CacheConfig:enabled [cacheDataOnRead=true] [cacheDataOnWrite=false] [cacheIndexesOnWrite=false] [cacheBloomsOnWrite=false] [cacheEvictOnClose=false] [cacheCompressed=false]
> 2012-05-18 20:03:38,446 INFO org.apache.hadoop.hbase.regionserver.StoreFile: Delete Family Bloom filter type for hdfs://10.18.40.217:9000/hbase/ufdr/1d4656fd417a07c9171a38b8f4d08510/.tmp/03742024b28f443bb63cfc338d4ca422: CompoundBloomFilterWriter
> 2012-05-18 20:04:25,576 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction started; Attempting to free 120.57 MB of total=1020.57 MB
> 2012-05-18 20:04:25,655 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction completed; freed=120.82 MB, total=907.89 MB, single=1012.11 MB, multi=6.12 MB, memory=0 KB
> 2012-05-18 20:04:25,733 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> java.lang.IllegalStateException: Schema metrics requested before table/CF name initialization: {"tableName":"null","cfName":"null"}
> 	at org.apache.hadoop.hbase.regionserver.metrics.SchemaConfigured.getSchemaMetrics(SchemaConfigured.java:182)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.updateSizeMetrics(LruBlockCache.java:310)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:274)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:293)
> 	at org.apache.hadoop.hbase.io.hfile.DoubleBlockCache.getBlock(DoubleBlockCache.java:102)
> 	at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:296)
> 	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$AbstractScannerV2.seekTo(HFileReaderV2.java:475)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:226)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:145)
> 	at org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:130)
> 	at org.apache.hadoop.hbase.regionserver.Store.getScanner(Store.java:2001)
> 	at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:3274)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:1604)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1596)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1572)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:2310)
> 	at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:364)
> 	at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1376)
> 2012-05-18 20:04:25,828 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> {noformat}

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[jira] [Commented] (HBASE-6048) Table Scan is failing if offheap cache enabled

Posted by "ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/HBASE-6048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13493780#comment-13493780 ] 

ramkrishna.s.vasudevan commented on HBASE-6048:
-----------------------------------------------

for 0.94 we need to fix this then right ? Actually we did not focus on this much as offheapcache was an experimental feature.
                
> Table Scan is failing if offheap cache enabled
> ----------------------------------------------
>
>                 Key: HBASE-6048
>                 URL: https://issues.apache.org/jira/browse/HBASE-6048
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.94.0
>            Reporter: Gopinathan A
>            Assignee: ramkrishna.s.vasudevan
>
> Table Scan is failing if offheap cache enabled.
> {noformat}
> 2012-05-18 20:03:38,446 DEBUG org.apache.hadoop.hbase.io.hfile.HFileWriterV2: Initialized with CacheConfig:enabled [cacheDataOnRead=true] [cacheDataOnWrite=false] [cacheIndexesOnWrite=false] [cacheBloomsOnWrite=false] [cacheEvictOnClose=false] [cacheCompressed=false]
> 2012-05-18 20:03:38,446 INFO org.apache.hadoop.hbase.regionserver.StoreFile: Delete Family Bloom filter type for hdfs://10.18.40.217:9000/hbase/ufdr/1d4656fd417a07c9171a38b8f4d08510/.tmp/03742024b28f443bb63cfc338d4ca422: CompoundBloomFilterWriter
> 2012-05-18 20:04:25,576 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction started; Attempting to free 120.57 MB of total=1020.57 MB
> 2012-05-18 20:04:25,655 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction completed; freed=120.82 MB, total=907.89 MB, single=1012.11 MB, multi=6.12 MB, memory=0 KB
> 2012-05-18 20:04:25,733 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> java.lang.IllegalStateException: Schema metrics requested before table/CF name initialization: {"tableName":"null","cfName":"null"}
> 	at org.apache.hadoop.hbase.regionserver.metrics.SchemaConfigured.getSchemaMetrics(SchemaConfigured.java:182)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.updateSizeMetrics(LruBlockCache.java:310)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:274)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:293)
> 	at org.apache.hadoop.hbase.io.hfile.DoubleBlockCache.getBlock(DoubleBlockCache.java:102)
> 	at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:296)
> 	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$AbstractScannerV2.seekTo(HFileReaderV2.java:475)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:226)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:145)
> 	at org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:130)
> 	at org.apache.hadoop.hbase.regionserver.Store.getScanner(Store.java:2001)
> 	at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:3274)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:1604)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1596)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1572)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:2310)
> 	at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:364)
> 	at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1376)
> 2012-05-18 20:04:25,828 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> {noformat}

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[jira] [Updated] (HBASE-6048) Table Scan is failing if offheap cache enabled

Posted by "ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HBASE-6048?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ramkrishna.s.vasudevan updated HBASE-6048:
------------------------------------------

    Priority: Critical  (was: Major)
    
> Table Scan is failing if offheap cache enabled
> ----------------------------------------------
>
>                 Key: HBASE-6048
>                 URL: https://issues.apache.org/jira/browse/HBASE-6048
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.94.0
>            Reporter: Gopinathan A
>            Priority: Critical
>
> Table Scan is failing if offheap cache enabled.
> {noformat}
> 2012-05-18 20:03:38,446 DEBUG org.apache.hadoop.hbase.io.hfile.HFileWriterV2: Initialized with CacheConfig:enabled [cacheDataOnRead=true] [cacheDataOnWrite=false] [cacheIndexesOnWrite=false] [cacheBloomsOnWrite=false] [cacheEvictOnClose=false] [cacheCompressed=false]
> 2012-05-18 20:03:38,446 INFO org.apache.hadoop.hbase.regionserver.StoreFile: Delete Family Bloom filter type for hdfs://10.18.40.217:9000/hbase/ufdr/1d4656fd417a07c9171a38b8f4d08510/.tmp/03742024b28f443bb63cfc338d4ca422: CompoundBloomFilterWriter
> 2012-05-18 20:04:25,576 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction started; Attempting to free 120.57 MB of total=1020.57 MB
> 2012-05-18 20:04:25,655 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction completed; freed=120.82 MB, total=907.89 MB, single=1012.11 MB, multi=6.12 MB, memory=0 KB
> 2012-05-18 20:04:25,733 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> java.lang.IllegalStateException: Schema metrics requested before table/CF name initialization: {"tableName":"null","cfName":"null"}
> 	at org.apache.hadoop.hbase.regionserver.metrics.SchemaConfigured.getSchemaMetrics(SchemaConfigured.java:182)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.updateSizeMetrics(LruBlockCache.java:310)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:274)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:293)
> 	at org.apache.hadoop.hbase.io.hfile.DoubleBlockCache.getBlock(DoubleBlockCache.java:102)
> 	at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:296)
> 	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$AbstractScannerV2.seekTo(HFileReaderV2.java:475)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:226)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:145)
> 	at org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:130)
> 	at org.apache.hadoop.hbase.regionserver.Store.getScanner(Store.java:2001)
> 	at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:3274)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:1604)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1596)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1572)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:2310)
> 	at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:364)
> 	at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1376)
> 2012-05-18 20:04:25,828 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> {noformat}

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[jira] [Assigned] (HBASE-6048) Table Scan is failing if offheap cache enabled

Posted by "ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/HBASE-6048?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ramkrishna.s.vasudevan reassigned HBASE-6048:
---------------------------------------------

    Assignee: ramkrishna.s.vasudevan
    
> Table Scan is failing if offheap cache enabled
> ----------------------------------------------
>
>                 Key: HBASE-6048
>                 URL: https://issues.apache.org/jira/browse/HBASE-6048
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.94.0
>            Reporter: Gopinathan A
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Critical
>
> Table Scan is failing if offheap cache enabled.
> {noformat}
> 2012-05-18 20:03:38,446 DEBUG org.apache.hadoop.hbase.io.hfile.HFileWriterV2: Initialized with CacheConfig:enabled [cacheDataOnRead=true] [cacheDataOnWrite=false] [cacheIndexesOnWrite=false] [cacheBloomsOnWrite=false] [cacheEvictOnClose=false] [cacheCompressed=false]
> 2012-05-18 20:03:38,446 INFO org.apache.hadoop.hbase.regionserver.StoreFile: Delete Family Bloom filter type for hdfs://10.18.40.217:9000/hbase/ufdr/1d4656fd417a07c9171a38b8f4d08510/.tmp/03742024b28f443bb63cfc338d4ca422: CompoundBloomFilterWriter
> 2012-05-18 20:04:25,576 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction started; Attempting to free 120.57 MB of total=1020.57 MB
> 2012-05-18 20:04:25,655 DEBUG org.apache.hadoop.hbase.io.hfile.LruBlockCache: Block cache LRU eviction completed; freed=120.82 MB, total=907.89 MB, single=1012.11 MB, multi=6.12 MB, memory=0 KB
> 2012-05-18 20:04:25,733 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> java.lang.IllegalStateException: Schema metrics requested before table/CF name initialization: {"tableName":"null","cfName":"null"}
> 	at org.apache.hadoop.hbase.regionserver.metrics.SchemaConfigured.getSchemaMetrics(SchemaConfigured.java:182)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.updateSizeMetrics(LruBlockCache.java:310)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:274)
> 	at org.apache.hadoop.hbase.io.hfile.LruBlockCache.cacheBlock(LruBlockCache.java:293)
> 	at org.apache.hadoop.hbase.io.hfile.DoubleBlockCache.getBlock(DoubleBlockCache.java:102)
> 	at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:296)
> 	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$AbstractScannerV2.seekTo(HFileReaderV2.java:475)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:226)
> 	at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:145)
> 	at org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:130)
> 	at org.apache.hadoop.hbase.regionserver.Store.getScanner(Store.java:2001)
> 	at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:3274)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:1604)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1596)
> 	at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1572)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:2310)
> 	at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:364)
> 	at org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1376)
> 2012-05-18 20:04:25,828 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> {noformat}

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