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https://issues.apache.org/jira/browse/HBASE-16993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16091192#comment-16091192
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Anoop Sam John commented on HBASE-16993:
----------------------------------------
Yes.
The wastage concern was more like block size is say 46KB but the default
setting have block size of 49 means 3 KB per block waste. But the initial
config can be tuned. We allow that. One can make this to have a 46KB bucket
size. That is absolutely fine. The issue is the block (bucket ) size can NOT
have any value which is NOT a multiple of 256. I think the reporter also not
specifically want this. I feel 256 multiple requirement is very much fine. We
dont clearly document this. We should add that in the config description. Also
the code should check this and early fail if not acceptable size value.
> BucketCache throw java.io.IOException: Invalid HFile block magic when
> DATA_BLOCK_ENCODING set to DIFF
> -----------------------------------------------------------------------------------------------------
>
> Key: HBASE-16993
> URL: https://issues.apache.org/jira/browse/HBASE-16993
> Project: HBase
> Issue Type: Bug
> Components: BucketCache, io
> Affects Versions: 1.1.3
> Environment: hbase version 1.1.3
> Reporter: liubangchen
> Assignee: liubangchen
> Fix For: 2.0.0
>
> Attachments: HBASE-16993.000.patch, HBASE-16993.001.patch,
> HBASE-16993.master.001.patch, HBASE-16993.master.002.patch,
> HBASE-16993.master.003.patch, HBASE-16993.master.004.patch,
> HBASE-16993.master.005.patch
>
> Original Estimate: 336h
> Remaining Estimate: 336h
>
> hbase-site.xml setting
> <property>
> <name>hbase.bucketcache.bucket.sizes</name>
> <value>16384,32768,40960,
> 46000,49152,51200,65536,131072,524288</value>
> </property>
> <property>
> <name>hbase.bucketcache.size</name>
> <value>16384</value>
> </property>
> <property>
> <name>hbase.bucketcache.ioengine</name>
> <value>offheap</value>
> </property>
> <property>
> <name>hfile.block.cache.size</name>
> <value>0.3</value>
> </property>
> <property>
> <name>hfile.block.bloom.cacheonwrite</name>
> <value>true</value>
> </property>
> <property>
> <name>hbase.rs.cacheblocksonwrite</name>
> <value>true</value>
> </property>
> <property>
> <name>hfile.block.index.cacheonwrite</name>
> <value>true</value>
> </property
> n_splits = 200
> create 'usertable',{NAME =>'family', COMPRESSION => 'snappy', VERSIONS =>
> 1,DATA_BLOCK_ENCODING => 'DIFF',CONFIGURATION =>
> {'hbase.hregion.memstore.block.multiplier' => 5}},{DURABILITY =>
> 'SKIP_WAL'},{SPLITS => (1..n_splits).map {|i|
> "user#{1000+i*(9999-1000)/n_splits}"}}
> load data
> bin/ycsb load hbase10 -P workloads/workloada -p table=usertable -p
> columnfamily=family -p fieldcount=10 -p fieldlength=100 -p
> recordcount=200000000 -p insertorder=hashed -p insertstart=0 -p
> clientbuffering=true -p durability=SKIP_WAL -threads 20 -s
> run
> bin/ycsb run hbase10 -P workloads/workloadb -p table=usertable -p
> columnfamily=family -p fieldcount=10 -p fieldlength=100 -p
> operationcount=20000000 -p readallfields=true -p clientbuffering=true -p
> requestdistribution=zipfian -threads 10 -s
> log info
> 2016-11-02 20:20:20,261 ERROR
> [RW.default.readRpcServer.handler=36,queue=21,port=6020] bucket.BucketCache:
> Failed reading block fdcc7ed6f3b2498b9ef316cc8206c233_44819759 from bucket
> cache
> 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:154)
> at org.apache.hadoop.hbase.io.hfile.BlockType.read(BlockType.java:167)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock.<init>(HFileBlock.java:273)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock$1.deserialize(HFileBlock.java:134)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock$1.deserialize(HFileBlock.java:121)
> at
> org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.getBlock(BucketCache.java:427)
> at
> org.apache.hadoop.hbase.io.hfile.CombinedBlockCache.getBlock(CombinedBlockCache.java:85)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderV2.getCachedBlock(HFileReaderV2.java:266)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:403)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlockIndex$BlockIndexReader.loadDataBlockWithScanInfo(HFileBlockIndex.java:269)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderV2$AbstractScannerV2.seekTo(HFileReaderV2.java:634)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderV2$AbstractScannerV2.seekTo(HFileReaderV2.java:584)
> at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:247)
> at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:156)
> at
> org.apache.hadoop.hbase.regionserver.StoreScanner.seekScanners(StoreScanner.java:363)
> at
> org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:217)
> at
> org.apache.hadoop.hbase.regionserver.HStore.getScanner(HStore.java:2071)
> at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:5369)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:2546)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:2532)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:2514)
> at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:6558)
> at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:6537)
> at
> org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:1935)
> at
> org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:32381)
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2117)
> at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:104)
> at
> org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:133)
> at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:108)
> at java.lang.Thread.run(Thread.java:745)
> 2016-11-02 20:20:20,263 ERROR
> [RW.default.readRpcServer.handler=50,queue=20,port=6020] bucket.BucketCache:
> Failed reading block c45d6b14789546b785bae94c69c683d5_34198622 from bucket
> cache
> 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:154)
> at org.apache.hadoop.hbase.io.hfile.BlockType.read(BlockType.java:167)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock.<init>(HFileBlock.java:273)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock$1.deserialize(HFileBlock.java:134)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock$1.deserialize(HFileBlock.java:121)
> at
> org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.getBlock(BucketCache.java:427)
> at
> org.apache.hadoop.hbase.io.hfile.CombinedBlockCache.getBlock(CombinedBlockCache.java:85)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderV2.getCachedBlock(HFileReaderV2.java:266)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:403)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlockIndex$BlockIndexReader.loadDataBlockWithScanInfo(HFileBlockIndex.java:269)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderV2$AbstractScannerV2.seekTo(HFileReaderV2.java:634)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderV2$AbstractScannerV2.seekTo(HFileReaderV2.java:584)
> at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:247)
> at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:156)
> at
> org.apache.hadoop.hbase.regionserver.StoreScanner.seekScanners(StoreScanner.java:363)
> at
> org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:217)
> at
> org.apache.hadoop.hbase.regionserver.HStore.getScanner(HStore.java:2071)
> at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:5369)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:2546)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:2532)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:2514)
> at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:6558)
> at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:6537)
> at
> org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:1935)
> at
> org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:32381)
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2117)
> at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:104)
> at
> org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:133)
> at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:108)
> at java.lang.Thread.run(Thread.java:745)
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