Pankaj Kumar created HBASE-29955:
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Summary: HMaster getting aborted due to NPE while creating
snapshot for invalid table name
Key: HBASE-29955
URL: https://issues.apache.org/jira/browse/HBASE-29955
Project: HBase
Issue Type: Bug
Components: snapshots
Reporter: Pankaj Kumar
Assignee: Pankaj Kumar
NPE occurs at AccessController side because hTableDescriptor is null in
AccessController#preSnapshot,
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2026-03-03T19:20:28,747 ERROR
[RpcServer.default.FPBQ.Fifo.handler=2,queue=0,port=40359]
coprocessor.CoprocessorHost(435): The coprocessor
org.apache.hadoop.hbase.security.access.AccessController threw
java.lang.NullPointerException: Cannot invoke
"org.apache.hadoop.hbase.client.TableDescriptor.getTableName()" because
"hTableDescriptor" is null
java.lang.NullPointerException: Cannot invoke
"org.apache.hadoop.hbase.client.TableDescriptor.getTableName()" because
"hTableDescriptor" is null
at
org.apache.hadoop.hbase.security.access.AccessController.preSnapshot(AccessController.java:1048)
at
org.apache.hadoop.hbase.master.MasterCoprocessorHost$83.call(MasterCoprocessorHost.java:1121)
at
org.apache.hadoop.hbase.master.MasterCoprocessorHost$83.call(MasterCoprocessorHost.java:1118)
at
org.apache.hadoop.hbase.coprocessor.CoprocessorHost$ObserverOperationWithoutResult.callObserver(CoprocessorHost.java:592)
at
org.apache.hadoop.hbase.coprocessor.CoprocessorHost.execOperation(CoprocessorHost.java:676)
at
org.apache.hadoop.hbase.master.MasterCoprocessorHost.preSnapshot(MasterCoprocessorHost.java:1118)
at
org.apache.hadoop.hbase.master.snapshot.SnapshotManager$1.run(SnapshotManager.java:735)
at
org.apache.hadoop.hbase.master.procedure.MasterProcedureUtil.submitProcedure(MasterProcedureUtil.java:137)
at
org.apache.hadoop.hbase.master.snapshot.SnapshotManager.submitSnapshotProcedure(SnapshotManager.java:724)
at
org.apache.hadoop.hbase.master.snapshot.SnapshotManager.takeSnapshot(SnapshotManager.java:715)
at
org.apache.hadoop.hbase.master.MasterRpcServices.snapshot(MasterRpcServices.java:1812)
at
org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod(MasterProtos.java)
at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:461)
at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:124)
at org.apache.hadoop.hbase.ipc.RpcHandler.run(RpcHandler.java:102)
at org.apache.hadoop.hbase.ipc.RpcHandler.run(RpcHandler.java:82)
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And HMaster abort due to NPE,
{noformat}
2026-03-03T19:20:28,747 INFO [M:0;pankaj-Latitude-E7450:40359]
region.RegionProcedureStore(110): Stopping the Region Procedure Store,
isAbort=true
2026-03-03T19:20:28,750 DEBUG
[RpcServer.default.FPBQ.Fifo.handler=2,queue=0,port=40359]
master.HMaster(3267): Abort called but aborted=true, stopped=true
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