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https://issues.apache.org/jira/browse/IMPALA-12399?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Venugopal Reddy K updated IMPALA-12399:
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Description: 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. (was: Notification events like OPEN_TXN are ignored on
catalogd. 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.)
> 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
> Priority: Major
>
> 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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