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https://issues.apache.org/jira/browse/HIVE-26599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17616131#comment-17616131
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Teddy Choi commented on HIVE-26599:
-----------------------------------
Hello [~vpatni], please update the status and create a corresponding PR. Thank
you.
> Fix NPE encountered in second dump cycle of optimised bootstrap
> ---------------------------------------------------------------
>
> Key: HIVE-26599
> URL: https://issues.apache.org/jira/browse/HIVE-26599
> Project: Hive
> Issue Type: Bug
> Reporter: Teddy Choi
> Assignee: Vinit Patni
> Priority: Blocker
>
> After creating reverse replication policy after failover is completed from
> Primary to DR cluster and DR takes over. First dump and load cycle of
> optimised bootstrap is completing successfully, But We are encountering Null
> pointer exception in the second dump cycle which is halting this reverse
> replication and major blocker to test complete cycle of replication.
> {code:java}
> Scheduled Query Executor(schedule:repl_reverse, execution_id:14)]: FAILED:
> Execution Error, return code -101 from
> org.apache.hadoop.hive.ql.exec.repl.ReplDumpTask.
> java.lang.NullPointerException
> at
> org.apache.hadoop.hive.ql.parse.repl.metric.ReplicationMetricCollector.reportStageProgress(ReplicationMetricCollector.java:192)
> at
> org.apache.hadoop.hive.ql.exec.repl.ReplDumpTask.dumpTable(ReplDumpTask.java:1458)
> at
> org.apache.hadoop.hive.ql.exec.repl.ReplDumpTask.incrementalDump(ReplDumpTask.java:961)
> at
> org.apache.hadoop.hive.ql.exec.repl.ReplDumpTask.execute(ReplDumpTask.java:290)
> at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:213)
> at
> org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:105)
> at org.apache.hadoop.hive.ql.Executor.launchTask(Executor.java:357)
> at org.apache.hadoop.hive.ql.Executor.launchTasks(Executor.java:330)
> at org.apache.hadoop.hive.ql.Executor.runTasks(Executor.java:246)
> at org.apache.hadoop.hive.ql.Executor.execute(Executor.java:109)
> at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:749)
> at org.apache.hadoop.hive.ql.Driver.run(Driver.java:504)
> at org.apache.hadoop.hive.ql.Driver.run(Driver.java:498)
> at org.apache.hadoop.hive.ql.reexec.ReExecDriver.run(ReExecDriver.java:166)
> at
> org.apache.hadoop.hive.ql.reexec.ReExecDriver.run(ReExecDriver.java:232){code}
> After doing RCA, we figured out that In second dump cycle on DR cluster when
> StageStart method is invoked by code, metrics corresponding to Tables is not
> being registered (which should be registered as we are doing selective
> bootstrap of tables for optimise bootstrap along with incremental dump) which
> is causing NPE when it is trying to update the progress corresponding to this
> metric latter on after bootstrap of table is completed.
> Fix is to register the Tables metric before updating the progress.
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