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Anoop Sam John commented on HBASE-15616: ---------------------------------------- Ya empty qualifier is legal. table.checkAndPut(row, family, null, Bytes.toBytes(0), new Put(row).addColumn(family, null, Bytes.toBytes(1))); Instead of null if used empty string things will work normal? > CheckAndMutate will encouter NPE if qualifier to check is null > -------------------------------------------------------------- > > Key: HBASE-15616 > URL: https://issues.apache.org/jira/browse/HBASE-15616 > Project: HBase > Issue Type: Bug > Components: Client > Affects Versions: 2.0.0 > Reporter: Jianwei Cui > Assignee: Jianwei Cui > Attachments: HBASE-15616-v1.patch, HBASE-15616-v2.patch > > > If qualifier to check is null, the checkAndMutate/checkAndPut/checkAndDelete > will encounter NPE. > The test code: > {code} > table.checkAndPut(row, family, null, Bytes.toBytes(0), new > Put(row).addColumn(family, null, Bytes.toBytes(1))); > {code} > The exception: > {code} > Exception in thread "main" > org.apache.hadoop.hbase.client.RetriesExhaustedException: Failed after > attempts=3, exceptions: > Fri Apr 08 15:51:31 CST 2016, > RpcRetryingCaller{globalStartTime=1460101891615, pause=100, maxAttempts=3}, > java.io.IOException: com.google.protobuf.ServiceException: > java.lang.NullPointerException > Fri Apr 08 15:51:31 CST 2016, > RpcRetryingCaller{globalStartTime=1460101891615, pause=100, maxAttempts=3}, > java.io.IOException: com.google.protobuf.ServiceException: > java.lang.NullPointerException > Fri Apr 08 15:51:32 CST 2016, > RpcRetryingCaller{globalStartTime=1460101891615, pause=100, maxAttempts=3}, > java.io.IOException: com.google.protobuf.ServiceException: > java.lang.NullPointerException > at > org.apache.hadoop.hbase.client.RpcRetryingCallerImpl.callWithRetries(RpcRetryingCallerImpl.java:120) > at org.apache.hadoop.hbase.client.HTable.checkAndPut(HTable.java:772) > at ... > Caused by: java.io.IOException: com.google.protobuf.ServiceException: > java.lang.NullPointerException > at > org.apache.hadoop.hbase.protobuf.ProtobufUtil.getRemoteException(ProtobufUtil.java:341) > at org.apache.hadoop.hbase.client.HTable$7.call(HTable.java:768) > at org.apache.hadoop.hbase.client.HTable$7.call(HTable.java:755) > at > org.apache.hadoop.hbase.client.RpcRetryingCallerImpl.callWithRetries(RpcRetryingCallerImpl.java:99) > ... 2 more > Caused by: com.google.protobuf.ServiceException: > java.lang.NullPointerException > at > org.apache.hadoop.hbase.ipc.AbstractRpcClient.callBlockingMethod(AbstractRpcClient.java:239) > at > org.apache.hadoop.hbase.ipc.AbstractRpcClient$BlockingRpcChannelImplementation.callBlockingMethod(AbstractRpcClient.java:331) > at > org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$BlockingStub.mutate(ClientProtos.java:35252) > at org.apache.hadoop.hbase.client.HTable$7.call(HTable.java:765) > ... 4 more > Caused by: java.lang.NullPointerException > at com.google.protobuf.LiteralByteString.size(LiteralByteString.java:76) > at > com.google.protobuf.CodedOutputStream.computeBytesSizeNoTag(CodedOutputStream.java:767) > at > com.google.protobuf.CodedOutputStream.computeBytesSize(CodedOutputStream.java:539) > at > org.apache.hadoop.hbase.protobuf.generated.ClientProtos$Condition.getSerializedSize(ClientProtos.java:7483) > at > com.google.protobuf.CodedOutputStream.computeMessageSizeNoTag(CodedOutputStream.java:749) > at > com.google.protobuf.CodedOutputStream.computeMessageSize(CodedOutputStream.java:530) > at > org.apache.hadoop.hbase.protobuf.generated.ClientProtos$MutateRequest.getSerializedSize(ClientProtos.java:12431) > at > org.apache.hadoop.hbase.ipc.IPCUtil.getTotalSizeWhenWrittenDelimited(IPCUtil.java:311) > at > org.apache.hadoop.hbase.ipc.AsyncRpcChannel.writeRequest(AsyncRpcChannel.java:409) > at > org.apache.hadoop.hbase.ipc.AsyncRpcChannel.callMethod(AsyncRpcChannel.java:333) > at > org.apache.hadoop.hbase.ipc.AsyncRpcClient.call(AsyncRpcClient.java:245) > at > org.apache.hadoop.hbase.ipc.AbstractRpcClient.callBlockingMethod(AbstractRpcClient.java:226) > ... 7 more > {code} > The reason is {{LiteralByteString.size()}} will throw NPE if wrapped byte > array is null. It is possible to invoke {{put}} and {{checkAndMutate}} on the > same column, because null qualifier is allowed for {{Put}}, users may be > confused if null qualifier is not allowed for {{checkAndMutate}}. We can also > convert null qualifier to empty byte array for {{checkAndMutate}} in client > side. Discussions and suggestions are welcomed. -- This message was sent by Atlassian JIRA (v6.3.4#6332)