You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@impala.apache.org by "Quanlong Huang (Jira)" <ji...@apache.org> on 2020/12/18 08:34:01 UTC
[jira] [Resolved] (IMPALA-8968) Fix self-event detection on
database events.
[ https://issues.apache.org/jira/browse/IMPALA-8968?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Quanlong Huang resolved IMPALA-8968.
------------------------------------
Fix Version/s: Impala 3.4.0
Resolution: Fixed
> Fix self-event detection on database events.
> --------------------------------------------
>
> Key: IMPALA-8968
> URL: https://issues.apache.org/jira/browse/IMPALA-8968
> Project: IMPALA
> Issue Type: Bug
> Components: Frontend
> Reporter: Anurag Mantripragada
> Assignee: Anurag Mantripragada
> Priority: Major
> Fix For: Impala 3.4.0
>
>
> When event processing is turned on, self-events are not detected for DATABASE level events (create/alter/drop database). Reproduced using the below statements:
> {code:java}
> CREATE DATABASE test;
> CREATE FUNCTION test.fn_test (INT, STRING) RETURNS BOOLEAN LOCATION '/test-warehouse/dummy.jar' SYMBOL='com.cloudera.impala.TestUdf';
> DROP FUNCTION test.fn_test(INT, STRING);
> DROP DATABASE test CASCADE; {code}
> Since the events processor could not detect self-events, it will try to process the ALTER_DATABASE event created by dropping the function. However, it doesn't find the DB and errors out like below:
> {code:java}
> I0923 16:09:46.042317 6727 MetastoreEventsProcessor.java:480] Received 2 events. Start event id : 30077
> I0923 16:09:46.042317 6727 MetastoreEventsProcessor.java:480] Received 2 events. Start event id : 30077
> I0923 16:09:46.042853 6727 MetastoreEvents.java:382] EventId: 30078 EventType: ALTER_DATABASE Creating event 30078 of type ALTER_DATABASE on database test
> I0923 16:09:46.044441 6727 MetastoreEvents.java:382] EventId: 30079 EventType: DROP_DATABASE Creating event 30079 of type DROP_DATABASE on database test
> I0923 16:09:46.050657 6727 MetastoreEvents.java:231] Total number of events received: 2 Total number of events filtered out: 0
> I0923 16:09:46.051167 6727 MetastoreEvents.java:382] EventId: 30078 EventType: ALTER_DATABASE Received exception Database test not found. Ignoring self-event evaluation
> E0923 16:09:46.056273 6727 MetastoreEventsProcessor.java:525] Unexpected exception received while processing event
> Java exception follows:org.apache.impala.catalog.events.MetastoreNotificationException: Unable to process event 30078 of type ALTER_DATABASE. Event processing will be stopped.
> at org.apache.impala.catalog.events.MetastoreEventsProcessor.processEvents(MetastoreEventsProcessor.java:614)
> at org.apache.impala.catalog.events.MetastoreEventsProcessor.processEvents(MetastoreEventsProcessor.java:511)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
> at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
> at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
> at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: org.apache.impala.catalog.DatabaseNotFoundException: Database test not found
> at org.apache.impala.catalog.CatalogServiceCatalog.updateDb(CatalogServiceCatalog.java:1060)
> at org.apache.impala.catalog.events.MetastoreEvents$AlterDatabaseEvent.process(MetastoreEvents.java:1225)
> at org.apache.impala.catalog.events.MetastoreEvents$MetastoreEvent.processIfEnabled(MetastoreEvents.java:316)
> at org.apache.impala.catalog.events.MetastoreEventsProcessor.processEvents(MetastoreEventsProcessor.java:609)
> ... 8 more
> E0923 16:09:46.056489 6727 MetastoreEventsProcessor.java:631] Notification event is null
> W0923 16:09:56.057376 6727 MetastoreEventsProcessor.java:504] Event processing is skipped since status is ERROR. Last synced event id is 30077{code}
>
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)