[ 
https://issues.apache.org/jira/browse/HIVE-21880?focusedWorklogId=270610&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-270610
 ]

ASF GitHub Bot logged work on HIVE-21880:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 02/Jul/19 05:46
            Start Date: 02/Jul/19 05:46
    Worklog Time Spent: 10m 
      Work Description: ashutosh-bapat commented on pull request #684: 
HIVE-21880 : Enable flaky test 
TestReplicationScenariosAcidTablesBootstrap.testBootstrapAcidTablesDuringIncrementalWithConcurrentWrites.
URL: https://github.com/apache/hive/pull/684#discussion_r299310307
 
 

 ##########
 File path: 
hcatalog/server-extensions/src/main/java/org/apache/hive/hcatalog/listener/DbNotificationListener.java
 ##########
 @@ -997,6 +998,15 @@ private void addNotificationLog(NotificationEvent event, 
ListenerEvent listenerE
         stmt.execute("SET @@session.sql_mode=ANSI_QUOTES");
       }
 
+      // Derby doesn't allow FOR UPDATE to lock the row being selected (See 
https://db.apache
+      // .org/derby/docs/10.1/ref/rrefsqlj31783.html) . So lock the whole 
table. Since there's
+      // only one row in the table, this shouldn't cause any performance 
degradation. Also we not
+      // suggest Derby to be used in production so that's fine.
+      if (sqlGenerator.getDbProduct() == DatabaseProduct.DERBY) {
+        String lockingQuery = "lock table \"NOTIFICATION_SEQUENCE\" in 
exclusive mode";
+        LOG.info("Going to execute query <" + lockingQuery + ">");
+        stmt.executeUpdate(lockingQuery);
+      }
       String s = sqlGenerator.addForUpdateClause("select \"NEXT_EVENT_ID\" " +
 
 Review comment:
   sqlGenerator.addForUpdateClause() does not add FOR UPDATE clause for Derby, 
so effect is same.
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 270610)
    Time Spent: 2h 10m  (was: 2h)

> Enable flaky test 
> TestReplicationScenariosAcidTablesBootstrap.testBootstrapAcidTablesDuringIncrementalWithConcurrentWrites.
> ---------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-21880
>                 URL: https://issues.apache.org/jira/browse/HIVE-21880
>             Project: Hive
>          Issue Type: Bug
>          Components: repl
>    Affects Versions: 4.0.0
>            Reporter: Sankar Hariappan
>            Assignee: Ashutosh Bapat
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HIVE-21880.01.patch, HIVE-21880.02.patch, 
> HIVE-21880.03.patch
>
>          Time Spent: 2h 10m
>  Remaining Estimate: 0h
>
> Need tp enable 
> TestReplicationScenariosAcidTablesBootstrap.testBootstrapAcidTablesDuringIncrementalWithConcurrentWrites
>  which is disabled as it is flaky and randomly failing with below error.
> {code}
> Error Message
> Notification events are missing in the meta store.
> Stacktrace
> java.lang.IllegalStateException: Notification events are missing in the meta 
> store.
>       at 
> org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getNextNotification(HiveMetaStoreClient.java:3246)
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.lang.reflect.Method.invoke(Method.java:498)
>       at 
> org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.invoke(RetryingMetaStoreClient.java:212)
>       at com.sun.proxy.$Proxy58.getNextNotification(Unknown Source)
>       at 
> org.apache.hadoop.hive.ql.metadata.events.EventUtils$MSClientNotificationFetcher.getNextNotificationEvents(EventUtils.java:107)
>       at 
> org.apache.hadoop.hive.ql.metadata.events.EventUtils$NotificationEventIterator.fetchNextBatch(EventUtils.java:159)
>       at 
> org.apache.hadoop.hive.ql.metadata.events.EventUtils$NotificationEventIterator.hasNext(EventUtils.java:189)
>       at 
> org.apache.hadoop.hive.ql.exec.repl.ReplDumpTask.incrementalDump(ReplDumpTask.java:231)
>       at 
> org.apache.hadoop.hive.ql.exec.repl.ReplDumpTask.execute(ReplDumpTask.java:121)
>       at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:212)
>       at 
> org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:103)
>       at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:2709)
>       at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:2361)
>       at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:2028)
>       at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1788)
>       at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1782)
>       at 
> org.apache.hadoop.hive.ql.reexec.ReExecDriver.run(ReExecDriver.java:162)
>       at 
> org.apache.hadoop.hive.ql.reexec.ReExecDriver.run(ReExecDriver.java:223)
>       at 
> org.apache.hadoop.hive.ql.parse.WarehouseInstance.run(WarehouseInstance.java:227)
>       at 
> org.apache.hadoop.hive.ql.parse.WarehouseInstance.dump(WarehouseInstance.java:282)
>       at 
> org.apache.hadoop.hive.ql.parse.WarehouseInstance.dump(WarehouseInstance.java:265)
>       at 
> org.apache.hadoop.hive.ql.parse.WarehouseInstance.dump(WarehouseInstance.java:289)
>       at 
> org.apache.hadoop.hive.ql.parse.TestReplicationScenariosAcidTablesBootstrap.testBootstrapAcidTablesDuringIncrementalWithConcurrentWrites(TestReplicationScenariosAcidTablesBootstrap.java:328)
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>       at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>       at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>       at java.lang.reflect.Method.invoke(Method.java:498)
>       at 
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
>       at 
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
>       at 
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
>       at 
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
>       at 
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
>       at 
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
>       at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
>       at org.junit.rules.RunRules.evaluate(RunRules.java:20)
>       at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
>       at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
>       at 
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
>       at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
>       at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
>       at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
>       at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
>       at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
>       at 
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
>       at 
> org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
>       at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
>       at 
> org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:379)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:340)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:125)
>       at 
> org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:413)
> {code}
> https://builds.apache.org/job/PreCommit-HIVE-Build/17591/testReport/org.apache.hadoop.hive.ql.parse/TestReplicationScenariosAcidTablesBootstrap/testBootstrapAcidTablesDuringIncrementalWithConcurrentWrites/



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