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https://issues.apache.org/jira/browse/HIVE-20264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16571987#comment-16571987
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Hive QA commented on HIVE-20264:
--------------------------------
Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12934675/HIVE-20264.01.patch
{color:green}SUCCESS:{color} +1 due to 2 test(s) being added or modified.
{color:green}SUCCESS:{color} +1 due to 14868 tests passed
Test results:
https://builds.apache.org/job/PreCommit-HIVE-Build/13083/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/13083/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-13083/
Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.YetusPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
{noformat}
This message is automatically generated.
ATTACHMENT ID: 12934675 - PreCommit-HIVE-Build
> Bootstrap repl dump with concurrent write and drop of ACID table makes target
> inconsistent.
> -------------------------------------------------------------------------------------------
>
> Key: HIVE-20264
> URL: https://issues.apache.org/jira/browse/HIVE-20264
> Project: Hive
> Issue Type: Sub-task
> Components: HiveServer2, repl
> Affects Versions: 4.0.0, 3.2.0
> Reporter: Sankar Hariappan
> Assignee: Sankar Hariappan
> Priority: Major
> Labels: DR, pull-request-available, replication
> Attachments: HIVE-20264.01.patch
>
>
> During bootstrap dump of ACID tables, let's consider the below sequence.
> - Get lastReplId = last event ID logged.
> - Current session (Thread-1), REPL DUMP -> Open txn (Txn1) - Event-10
> - Another session (Thread-2), Open txn (Txn2) - Event-11
> - Thread-2 -> Insert data (T1.D1) to ACID table. - Event-12
> - Thread-2 -> Commit Txn (Txn2) - Event-13
> - Thread-2 -> Drop table (T1) - Event-14
> - Thread-1 -> Dump ACID tables based on current list of tables. So, T1 will
> be missing.
> - Thread-1 -> Commit Txn (Txn1)
> - REPL LOAD from bootstrap dump will skip T1.
> - Incremental REPL DUMP will start from Event-10 and hence allocate write id
> for table T1 and drop table(T1) is idempotent. So, at target, exist entries
> in TXN_TO_WRITE_ID and NEXT_WRITE_ID metastore tables.
> - Now, when we create another table at source with same name T1 and
> replicate, then it may lead to incorrect data for readers at target on T1.
> Couple of proposals:
> 1. Make allocate write ID idempotent which is not possible as table doesn't
> exist and MM table import may lead to allocate write id before creating
> table. So, cannot differentiate these 2 cases.
> 2. Make Drop table event to drop entries from TXN_TO_WRITE_ID and
> NEXT_WRITE_ID tables irrespective of table exist or not at target.
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