IndexHalfStoreFileReaderGenerator throws NullPointerException

018-08-08 09:15:25,075 FATAL [7,queue=3,port=60020] regionserver.HRegionServer - ABORTING region server phoenix1,60020,1533715370645: The coprocessor org.apache.hadoop.hbase.regionserver.IndexHalfStoreFileReaderGenerator threw java.lang.NullPointerException
 java.lang.NullPointerException
 at java.util.ArrayList.addAll(ArrayList.java:577)
 at org.apache.hadoop.hbase.regionserver.IndexHalfStoreFileReaderGenerator.getLocalIndexScanners(IndexHalfStoreFileReaderGenerator.java:398)
 at org.apache.hadoop.hbase.regionserver.IndexHalfStoreFileReaderGenerator.access$000(IndexHalfStoreFileReaderGenerator.java:73)
 at org.apache.hadoop.hbase.regionserver.IndexHalfStoreFileReaderGenerator$1.getScannersNoCompaction(IndexHalfStoreFileReaderGenerator.java:332)
 at org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:214)
 at org.apache.hadoop.hbase.regionserver.IndexHalfStoreFileReaderGenerator$1.<init>(IndexHalfStoreFileReaderGenerator.java:327)
 at org.apache.hadoop.hbase.regionserver.IndexHalfStoreFileReaderGenerator.preStoreScannerOpen(IndexHalfStoreFileReaderGenerator.java:326)
 at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$51.call(RegionCoprocessorHost.java:1335)
 at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost$RegionOperation.call(RegionCoprocessorHost.java:1693)
 at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.execOperation(RegionCoprocessorHost.java:1771)
 at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.execOperationWithResult(RegionCoprocessorHost.java:1734)
 at org.apache.hadoop.hbase.regionserver.RegionCoprocessorHost.preStoreScannerOpen(RegionCoprocessorHost.java:1330)
 at org.apache.hadoop.hbase.regionserver.HStore.getScanner(HStore.java:2169)
 at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.initializeScanners(HRegion.java:5916)
 at org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:5890)
 at org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:2739)
 at org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:2719)
 at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:7197)
 at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:7156)
 at org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:7149)
 at org.apache.hadoop.hbase.regionserver.RSRpcServices.get(RSRpcServices.java:2249)
 at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:35068)
 at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2373)
 at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:124)
 at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:188)
 at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:168