ashutosh-bapat commented on a change in pull request #684: HIVE-21880 : Enable
flaky test
TestReplicationScenariosAcidTablesBootstrap.testBootstrapAcidTablesDuringIncrementalWithConcurrentWrites.
URL: https://github.com/apache/hive/pull/684#discussion_r299055847
##########
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.
Review comment:
You are right!. Removed.
I was misled because of
https://cwiki.apache.org/confluence/display/Hive/AdminManual+Metastore+Administration#AdminManualMetastoreAdministration-Local/EmbeddedMetastoreDatabase(Derby),
where it says it's only for unit tests. But that's only for embedded db. Sorry
for the confusion
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