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https://issues.apache.org/jira/browse/HIVE-19219?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sankar Hariappan updated HIVE-19219:
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Description:
This is the case where the events were deleted on source because of old event
purging and hence min(source event id) > target event id (last replicated event
id).
Repl dump should fail in this case so that user can drop the database and
bootstrap again.
Cleaner thread is concurrently removing the expired events from
NOTIFICATION_LOG table. So, it is necessary to check if the current dump missed
any event while dumping. After fetching events in batches, we shall check if it
is fetched in contiguous sequence of event id. If it is not in contiguous
sequence, then likely some events missed in the dump and hence throw error.
was:
This is the case where the events were deleted on source because of old event
purging and hence min(source event id) > target event id (last replicated event
id).
Repl dump should fail in this case so that user can drop the database and
bootstrap again.
Cleaner thread is concurrently removing the expired events from
NOTIFICATION_LOG table. So, it is necessary to check if the current dump missed
any event while dumping. It is guaranteed that cleaner would clean sequentially
based on event id/eventTime. So, it is enough to check if the last replicated
event is still there in NOTIFICATION_LOG table even after dumping all events.
If it is not found, then likely some events missed in the dump and hence throw
error.
> Incremental REPL DUMP should throw error if requested events are cleaned-up.
> ----------------------------------------------------------------------------
>
> Key: HIVE-19219
> URL: https://issues.apache.org/jira/browse/HIVE-19219
> Project: Hive
> Issue Type: Bug
> Affects Versions: 3.0.0
> Reporter: Sankar Hariappan
> Assignee: Sankar Hariappan
> Priority: Major
> Labels: DR, pull-request-available, replication
> Fix For: 3.1.0
>
> Attachments: HIVE-19219.01.patch, HIVE-19219.02.patch,
> HIVE-19219.03.patch
>
>
> This is the case where the events were deleted on source because of old event
> purging and hence min(source event id) > target event id (last replicated
> event id).
> Repl dump should fail in this case so that user can drop the database and
> bootstrap again.
> Cleaner thread is concurrently removing the expired events from
> NOTIFICATION_LOG table. So, it is necessary to check if the current dump
> missed any event while dumping. After fetching events in batches, we shall
> check if it is fetched in contiguous sequence of event id. If it is not in
> contiguous sequence, then likely some events missed in the dump and hence
> throw error.
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