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Ted Yu updated HBASE-9818: -------------------------- Attachment: 9818-v3.txt Patch v3 allows TestHRegion and TestAtomicOperation to reach iteration #46. Please comment. > NPE in HFileBlock#AbstractFSReader#readAtOffset > ----------------------------------------------- > > Key: HBASE-9818 > URL: https://issues.apache.org/jira/browse/HBASE-9818 > Project: HBase > Issue Type: Bug > Reporter: Jimmy Xiang > Assignee: Ted Yu > Attachments: 9818-v2.txt, 9818-v3.txt > > > HFileBlock#istream seems to be null. I was wondering should we hide > FSDataInputStreamWrapper#useHBaseChecksum. > By the way, this happened when online schema change is enabled (encoding) > {noformat} > 2013-10-22 10:58:43,321 ERROR [RpcServer.handler=28,port=36020] > regionserver.HRegionServer: > java.lang.NullPointerException > at > org.apache.hadoop.hbase.io.hfile.HFileBlock$AbstractFSReader.readAtOffset(HFileBlock.java:1200) > at > org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderV2.readBlockDataInternal(HFileBlock.java:1436) > at > org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderV2.readBlockData(HFileBlock.java:1318) > at > org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:359) > at > org.apache.hadoop.hbase.io.hfile.HFileBlockIndex$BlockIndexReader.loadDataBlockWithScanInfo(HFileBlockIndex.java:254) > at > org.apache.hadoop.hbase.io.hfile.HFileReaderV2$AbstractScannerV2.seekTo(HFileReaderV2.java:503) > at > org.apache.hadoop.hbase.io.hfile.HFileReaderV2$AbstractScannerV2.reseekTo(HFileReaderV2.java:553) > at > org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseekAtOrAfter(StoreFileScanner.java:245) > at > org.apache.hadoop.hbase.regionserver.StoreFileScanner.reseek(StoreFileScanner.java:166) > at > org.apache.hadoop.hbase.regionserver.StoreFileScanner.enforceSeek(StoreFileScanner.java:361) > at > org.apache.hadoop.hbase.regionserver.KeyValueHeap.pollRealKV(KeyValueHeap.java:336) > at > org.apache.hadoop.hbase.regionserver.KeyValueHeap.generalizedSeek(KeyValueHeap.java:293) > at > org.apache.hadoop.hbase.regionserver.KeyValueHeap.requestSeek(KeyValueHeap.java:258) > at > org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.java:603) > at > org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:476) > at > org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java:129) > at > org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.populateResult(HRegion.java:3546) > at > org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextInternal(HRegion.java:3616) > at > org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextRaw(HRegion.java:3494) > at > org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextRaw(HRegion.java:3485) > at > org.apache.hadoop.hbase.regionserver.HRegionServer.scan(HRegionServer.java:3079) > at > org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:27022) > at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:1979) > at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:90) > at > org.apache.hadoop.hbase.ipc.SimpleRpcScheduler.consumerLoop(SimpleRpcScheduler.java:160) > at > org.apache.hadoop.hbase.ipc.SimpleRpcScheduler.access$000(SimpleRpcScheduler.java:38) > at > org.apache.hadoop.hbase.ipc.SimpleRpcScheduler$1.run(SimpleRpcScheduler.java:110) > at java.lang.Thread.run(Thread.java:724) > 2013-10-22 10:58:43,665 ERROR [RpcServer.handler=23,port=36020] > regionserver.HRegionServer: > org.apache.hadoop.hbase.exceptions.OutOfOrderScannerNextException: Expected > nextCallSeq: 53438 But the nextCallSeq got from client: 53437; > request=scanner_id: 1252577470624375060 number_of_rows: 100 close_scanner: > false next_call_seq: 53437 > at > org.apache.hadoop.hbase.regionserver.HRegionServer.scan(HRegionServer.java:3030) > at > org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:27022) > at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:1979) > at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:90) > at > org.apache.hadoop.hbase.ipc.SimpleRpcScheduler.consumerLoop(SimpleRpcScheduler.java:160) > at > org.apache.hadoop.hbase.ipc.SimpleRpcScheduler.access$000(SimpleRpcScheduler.java:38) > at > org.apache.hadoop.hbase.ipc.SimpleRpcScheduler$1.run(SimpleRpcScheduler.java:110) > at java.lang.Thread.run(Thread.java:724) > {noformat} -- This message was sent by Atlassian JIRA (v6.1#6144)