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https://issues.apache.org/jira/browse/IMPALA-12399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17785633#comment-17785633
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Sai Hemanth Gantasala commented on IMPALA-12399:
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I think we can add event type 'DELETE_TBL_COL_STAT_EVENT' to this list.
Truncate table operation generates one event for every column in the table and
it is not processed by the event processor, so I think we can add this to the
skip list.
> Pass eventTypeSkipList with OPEN_TXN in NotificationEventRequest to avoid
> receiving OPEN_TXN events from HMS
> ------------------------------------------------------------------------------------------------------------
>
> Key: IMPALA-12399
> URL: https://issues.apache.org/jira/browse/IMPALA-12399
> Project: IMPALA
> Issue Type: Improvement
> Components: Catalog
> Reporter: Venugopal Reddy K
> Assignee: Venugopal Reddy K
> Priority: Major
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Notification events like OPEN_TXN are ignored on catalogd
> {{{}MetastoreEventsProcessor{}}}. So, we can pass eventTypeSkipList with
> OPEN_TXN in NotificationEventRequest while invoking get_next_notification()
> to avoid reading such notification messages from HMS and then ignoring on
> catalogd. OPEN_TXN event being more frequent(received even upon describe
> table operation from beeline), we can significantly reduce unwanted
> processing on both HMS and catalogd. Catalogd reads events in batches of
> EVENTS_BATCH_SIZE_PER_RPC, skipping such unnecessary events can help catchup
> the events faster.
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