Riza Suminto has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/23174 )

Change subject: IMPALA-14227: In HA failover, passive catalogd should apply 
pending HMS events before being active
......................................................................


Patch Set 5:

(2 comments)

http://gerrit.cloudera.org:8080/#/c/23174/5/be/src/catalog/catalog-server.cc
File be/src/catalog/catalog-server.cc:

http://gerrit.cloudera.org:8080/#/c/23174/5/be/src/catalog/catalog-server.cc@902
PS5, Line 902: while (latest_hms_event_id == -1 && timeout_timer.ElapsedTime() 
< timeout_ns) {
Explain with comment why this loop is needed (why latest_hms_event_id == -1 
should be retried).

How often is the retry? There is no sleep/backoff between retry here. Is this 
OK?


http://gerrit.cloudera.org:8080/#/c/23174/5/be/src/catalog/catalog-server.cc@908
PS5, Line 908: // Don't need latest event id anymore.
nit: Elaborate this code comment more. Maybe something along this line:

Now that we figure out latest_hms_event_id from HMS, we loop and wait until 
last_synced_event_id catch up with this latest_hms_event_id or timeout passed.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Icf4fcb0e27c14197f79625749949b47c033a5f31
Gerrit-Change-Number: 23174
Gerrit-PatchSet: 5
Gerrit-Owner: Quanlong Huang <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Quanlong Huang <[email protected]>
Gerrit-Reviewer: Riza Suminto <[email protected]>
Gerrit-Reviewer: Wenzhe Zhou <[email protected]>
Gerrit-Comment-Date: Wed, 16 Jul 2025 14:57:35 +0000
Gerrit-HasComments: Yes

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