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Posted to issues@hbase.apache.org by "Biju Nair (JIRA)" <ji...@apache.org> on 2019/05/18 14:36:00 UTC
[jira] [Commented] (HBASE-22441) BucketCache NullPointerException
in cacheBlock
[ https://issues.apache.org/jira/browse/HBASE-22441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16843178#comment-16843178 ]
Biju Nair commented on HBASE-22441:
-----------------------------------
Hi [~aoxiang], any specific scenarios causing this issue and do you see an impact on the client? Also this is confined to v2.2.0 only? Thanks.
> BucketCache NullPointerException in cacheBlock
> ----------------------------------------------
>
> Key: HBASE-22441
> URL: https://issues.apache.org/jira/browse/HBASE-22441
> Project: HBase
> Issue Type: Bug
> Components: BucketCache
> Affects Versions: 2.2.0
> Reporter: binlijin
> Priority: Major
>
> There is no synchronized in the check in cacheBlock, and wen see NullPointerException in production cluster.
> {code}
> 2019-05-17 18:17:21,299 ERROR [RpcServer.default.FPBQ.Fifo.handler=20,queue=7,port=16020] ipc.RpcServer: Unexpected throwable object
> java.lang.NullPointerException
> at org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.returnBlock(BucketCache.java:1665)
> at org.apache.hadoop.hbase.io.hfile.BlockCacheUtil.shouldReplaceExistingCacheBlock(BlockCacheUtil.java:250)
> at org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.cacheBlockWithWait(BucketCache.java:426)
> at org.apache.hadoop.hbase.io.hfile.bucket.BucketCache.cacheBlock(BucketCache.java:412)
> at org.apache.hadoop.hbase.io.hfile.CombinedBlockCache.cacheBlock(CombinedBlockCache.java:67)
> at org.apache.hadoop.hbase.io.hfile.HFileReaderImpl.lambda$readBlock$2(HFileReaderImpl.java:1501)
> at java.util.Optional.ifPresent(Optional.java:159)
> at org.apache.hadoop.hbase.io.hfile.HFileReaderImpl.readBlock(HFileReaderImpl.java:1499)
> at org.apache.hadoop.hbase.io.hfile.HFileBlockIndex$CellBasedKeyBlockIndexReader.loadDataBlockWithScanInfo(HFileBlockIndex.java:340)
> at org.apache.hadoop.hbase.io.hfile.HFileBlockIndex$BlockIndexReader.seekToDataBlock(HFileBlockIndex.java:577)
> at org.apache.hadoop.hbase.io.hfile.HFileReaderImpl$HFileScannerImpl.seekBefore(HFileReaderImpl.java:869)
> at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekToPreviousRow(StoreFileScanner.java:515)
> at org.apache.hadoop.hbase.regionserver.ReversedKeyValueHeap.next(ReversedKeyValueHeap.java:135)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:644)
> at org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java:153)
> at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.populateResult(HRegion.java:6612)
> at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextInternal(HRegion.java:6776)
> at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextRaw(HRegion.java:6549)
> at org.apache.hadoop.hbase.regionserver.RSRpcServices.scan(RSRpcServices.java:3183)
> at org.apache.hadoop.hbase.regionserver.RSRpcServices.scan(RSRpcServices.java:3428)
> at org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:42002)
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:413)
> at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:132)
> at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:324)
> at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:304)
> {code}
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