[KYLIN-3518] Coprocessor reports NPE when execute a query on HBase 2.0

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: v2.5.0
• Component/s: Storage - HBase
• Assignee: Lijun Cao
• Reporter: Shao Feng Shi
• Created: 28/Aug/18 01:39
• Updated: 11/Feb/20 02:25
• Resolved: 31/Aug/18 05:57

Description

On HDP 3.0, build a cube and then run a simple count query, NPE occurred:

 

2018-08-28 01:30:16,969 DEBUG [Query f7bf8004-b516-e372-18df-0d507075d471-71] v2.CubeHBaseRPC:315 : hbase.rpc.timeout = 90000 ms, use 81000 ms as timeout for coprocessor
2018-08-28 01:30:16,983 INFO [Query f7bf8004-b516-e372-18df-0d507075d471-71] v2.CubeHBaseEndpointRPC:141 : Serialized scanRequestBytes 522 bytes, rawScanBytesString 44 bytes
2018-08-28 01:30:16,984 INFO [Query f7bf8004-b516-e372-18df-0d507075d471-71] v2.CubeHBaseEndpointRPC:143 : The scan 67b41fc6 for segment kylin_sales_cube_clone[20120101000000_20130101000000] is as below with 1 separate raw scans, shard part of start/end key is set to 0
2018-08-28 01:30:16,991 INFO [Query f7bf8004-b516-e372-18df-0d507075d471-71] v2.CubeHBaseRPC:288 : Visiting hbase table KYLIN_5Q088VO5I0: cuboid require post aggregation, from 0 to 16384 Start: \x00\x00\x00\x00\x00\x00\x00\x00\x40\x00\x00\x00\x00 (\x00\x00\x00\x00\x00\x00\x00\x00@\x00\x00\x00\x00) Stop: \x00\x00\x00\x00\x00\x00\x00\x00\x40\x00\xFF\xFF\xFF\x00 (\x00\x00\x00\x00\x00\x00\x00\x00@\x00\xFF\xFF\xFF\x00), No Fuzzy Key
2018-08-28 01:30:16,991 DEBUG [Query f7bf8004-b516-e372-18df-0d507075d471-71] v2.CubeHBaseEndpointRPC:148 : Submitting rpc to 1 shards starting from shard 0, scan range count 1
2018-08-28 01:30:17,010 INFO [Query f7bf8004-b516-e372-18df-0d507075d471-71] common.KylinConfig:332 : Loading kylin-defaults.properties from file:/root/shaofengshi/apache-kylin-2.5.0-SNAPSHOT-bin/tomcat/webapps/kylin/WEB-INF/lib/kylin-core-common-2.5.0-SNAPSHOT.jar!/kylin-defaults.properties
2018-08-28 01:30:17,033 DEBUG [Query f7bf8004-b516-e372-18df-0d507075d471-71] common.KylinConfig:291 : KYLIN_CONF property was not set, will seek KYLIN_HOME env variable
2018-08-28 01:30:17,051 INFO [pool-14-thread-1] hbase.HBaseConnection:110 : Creating coprocessor thread pool with max of 2048, core of 2048
2018-08-28 01:30:17,094 INFO [Query f7bf8004-b516-e372-18df-0d507075d471-71] gtrecord.SequentialCubeTupleIterator:73 : Using SortedIteratorMergerWithLimit to merge segment results
2018-08-28 01:30:17,097 DEBUG [Query f7bf8004-b516-e372-18df-0d507075d471-71] enumerator.OLAPEnumerator:117 : return TupleIterator...
2018-08-28 01:30:21,607 INFO [kylin-coproc--pool9-t1] client.RpcRetryingCallerImpl:134 : Call exception, tries=6, retries=6, started=4410 ms ago, cancelled=false, msg=java.io.IOException
at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:468)
at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:131)
at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:324)
at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:304)
Caused by: java.lang.NullPointerException
at org.apache.kylin.storage.hbase.cube.v2.coprocessor.endpoint.CubeVisitService.visitCube(CubeVisitService.java:253)
at org.apache.kylin.storage.hbase.cube.v2.coprocessor.endpoint.generated.CubeVisitProtos$CubeVisitService.callMethod(CubeVisitProtos.java:5555)
at org.apache.hadoop.hbase.regionserver.HRegion.execService(HRegion.java:8032)
at org.apache.hadoop.hbase.regionserver.RSRpcServices.execServiceOnRegion(RSRpcServices.java:2426)
at org.apache.hadoop.hbase.regionserver.RSRpcServices.execService(RSRpcServices.java:2408)
at org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:42010)
at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:409)
... 3 more
, details=row '' on table 'KYLIN_5Q088VO5I0' at region=KYLIN_5Q088VO5I0,,1535417272444.27b82cb4702db4557a98b9a7e60b7692., hostname=ignite03.com,16020,1534313612401, seqNum=2
2018-08-28 01:30:25,633 INFO [kylin-coproc--pool9-t1] client.RpcRetryingCallerImpl:134 : Call exception, tries=7, retries=7, started=8436 ms ago, cancelled=false, msg=java.io.IOException
at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:468)
at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:131)
at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:324)
at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:304)
Caused by: java.lang.NullPointerException
at org.apache.kylin.storage.hbase.cube.v2.coprocessor.endpoint.CubeVisitService.visitCube(CubeVisitService.java:253)
at org.apache.kylin.storage.hbase.cube.v2.coprocessor.endpoint.generated.CubeVisitProtos$CubeVisitService.callMethod(CubeVisitProtos.java:5555)
at org.apache.hadoop.hbase.regionserver.HRegion.execService(HRegion.java:8032)
at org.apache.hadoop.hbase.regionserver.RSRpcServices.execServiceOnRegion(RSRpcServices.java:2426)
at org.apache.hadoop.hbase.regionserver.RSRpcServices.execService(RSRpcServices.java:2408)
at org.apache.hadoop.hbase.shaded.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:42010)
at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:409)
... 3 more

Issue Links

• links to: GitHub Pull Request #215