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https://issues.apache.org/jira/browse/PHOENIX-4366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16431529#comment-16431529
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James Taylor commented on PHOENIX-4366:
---------------------------------------

Please review, [~sergey.soldatov]. Gets rid of state in region observer and 
factory class. [~samarthjain] - any idea why these were made member variables 
of the RegionObserver and initialized in preScannerOpen (as opposed to getting 
them when you need them)?

> Rebuilding a local index fails sometimes
> ----------------------------------------
>
>                 Key: PHOENIX-4366
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-4366
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.12.0
>            Reporter: Marcin Januszkiewicz
>            Assignee: James Taylor
>            Priority: Blocker
>             Fix For: 4.14.0
>
>         Attachments: PHOENIX-4366_v1.patch
>
>
> We have a table created in 4.12 with the new column encoding scheme and with 
> several local indexes. Sometimes when we issue an ALTER INDEX ... REBUILD 
> command, it fails with the following exception:
> {noformat}
> Error: org.apache.phoenix.exception.PhoenixIOException: 
> org.apache.hadoop.hbase.DoNotRetryIOException: 
> TRACES,\x01BY01O90A6-$599a349e,1509979836322.3f
> 30c9d449ed6c60a1cda6898f766bd0.: null                                         
>                                                                               
>                                   
>         at 
> org.apache.phoenix.util.ServerUtil.createIOException(ServerUtil.java:96)      
>                                                                               
>                        
>         at 
> org.apache.phoenix.util.ServerUtil.throwIOException(ServerUtil.java:62)       
>                                                                               
>                        
>         at 
> org.apache.phoenix.coprocessor.BaseScannerRegionObserver$RegionScannerHolder.overrideDelegate(BaseScannerRegionObserver.java:255)
>                                                   
>         at 
> org.apache.phoenix.coprocessor.BaseScannerRegionObserver$RegionScannerHolder.nextRaw(BaseScannerRegionObserver.java:284)
>                                                            
>         at 
> org.apache.hadoop.hbase.regionserver.RSRpcServices.scan(RSRpcServices.java:2541)
>                                                                               
>                      
>         at 
> org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:33648)
>                                                                 
>         at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2183)    
>                                                                               
>                                   
>         at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:112)    
>                                                                               
>                                   
>         at 
> org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:183)     
>                                                                               
>                        
>         at 
> org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:163)     
>                                                                               
>                        
> Caused by: java.lang.UnsupportedOperationException                            
>                                                                               
>                                   
>         at 
> org.apache.phoenix.schema.PTable$QualifierEncodingScheme$1.decode(PTable.java:247)
>                                                                               
>                    
>         at 
> org.apache.phoenix.schema.tuple.EncodedColumnQualiferCellsList.add(EncodedColumnQualiferCellsList.java:141)
>                                                                         
>         at 
> org.apache.phoenix.schema.tuple.EncodedColumnQualiferCellsList.add(EncodedColumnQualiferCellsList.java:56)
>                                                                          
>         at 
> org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:560) 
>                                                                               
>                        
>         at 
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java:147) 
>                                                                               
>                        
>         at 
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.populateResult(HRegion.java:5735)
>                                                                               
>      
>         at 
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextInternal(HRegion.java:5891)
>                                                                               
>        
>         at 
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextRaw(HRegion.java:5669)
>                                                                               
>             
>         at 
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextRaw(HRegion.java:5654)
>                                                                               
>             
>         at 
> org.apache.phoenix.coprocessor.UngroupedAggregateRegionObserver.doPostScannerOpen(UngroupedAggregateRegionObserver.java:522)
>                                                        
>         at 
> org.apache.phoenix.coprocessor.BaseScannerRegionObserver$RegionScannerHolder.overrideDelegate(BaseScannerRegionObserver.java:236)
>                                                   
>         ... 7 more (state=08000,code=101) 
> {noformat}
> This failure is intermittent, since usually we can run the command again and 
> it will succeed.



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