Ted Yu created HBASE-16874: ------------------------------ Summary: Potential NPE from ProcedureExecutor#stop() Key: HBASE-16874 URL: https://issues.apache.org/jira/browse/HBASE-16874 Project: HBase Issue Type: Bug Reporter: Ted Yu Priority: Minor
When examining failed test : https://builds.apache.org/job/HBase-TRUNK_matrix/lastCompletedBuild/jdk=JDK%201.8%20(latest),label=yahoo-not-h2/testReport/org.apache.hadoop.hbase.master.procedure/TestMasterFailoverWithProcedures/org_apache_hadoop_hbase_master_procedure_TestMasterFailoverWithProcedures/ I noticed the following: {code} 2016-10-18 18:47:39,313 INFO [Time-limited test] procedure.TestMasterFailoverWithProcedures(306): Restart 2 exec state: TRUNCATE_TABLE_CLEAR_FS_LAYOUT Exception in thread "ProcedureExecutorWorker-1" java.lang.NullPointerException at org.apache.hadoop.hbase.procedure2.ProcedureExecutor.stop(ProcedureExecutor.java:533) at org.apache.hadoop.hbase.procedure2.ProcedureExecutor.execProcedure(ProcedureExecutor.java:1197) at org.apache.hadoop.hbase.procedure2.ProcedureExecutor.executeProcedure(ProcedureExecutor.java:959) at org.apache.hadoop.hbase.procedure2.ProcedureExecutor.access$700(ProcedureExecutor.java:73) at org.apache.hadoop.hbase.procedure2.ProcedureExecutor$WorkerThread.run(ProcedureExecutor.java:1405) {code} This seems to be the result of race between stop() and join() methods. -- This message was sent by Atlassian JIRA (v6.3.4#6332)