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https://issues.apache.org/jira/browse/PHOENIX-5233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16814708#comment-16814708
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Lars Hofhansl commented on PHOENIX-5233:
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Can't stop myself.
-v6 brings back the checkpointing, the test also uses a 2nd connection.
Note that the test passes with Tephra but not with Omid. (and it fails in the
upsert/select not the 2nd parallel query).
I guess it has to do with checkpointing while a transaction is open and then
committing said transaction.
Note that the patch also does two things:
# It removes the special timestamp handling for the upsert/select case (that is
not needed with transactions and might mess up the timestamps). See
UpsertCompiler:592
# Flush edits to HBase immediately even when autocommit is off, relying instead
of transaction visibility semantics.
Even with that, we should never be able to see partial transactions.
> Read-your-own writes causes incorrect visibility with transactional tables
> (with Omid).
> ---------------------------------------------------------------------------------------
>
> Key: PHOENIX-5233
> URL: https://issues.apache.org/jira/browse/PHOENIX-5233
> Project: Phoenix
> Issue Type: Bug
> Affects Versions: 4.14.1
> Reporter: Lars Hofhansl
> Assignee: Yonatan Gottesman
> Priority: Major
> Attachments: 5233-v4.txt, 5233-v5.txt, 5233-v6.txt
>
>
> (copied from my last comment on PHOENIX-5090)
> Steps to reproduce (with Omid):
> # {{!autocommit off}}
> # {{create table test (pk1 integer not null, pk2 integer not null, pk3
> integer not null, v1 float, v2 float, v3 integer CONSTRAINT pk PRIMARY KEY
> (pk1, pk2, pk3)) DISABLE_WAL=true, TRANSACTIONAL=true;}}
> # {{upsert into test values(rand()*10000000, rand()*10000000,
> rand()*10000000, rand(), rand(), rand()*1000000);}}
> # {{upsert into test select rand()*10000000, rand()*10000000,
> rand()*10000000, rand(), rand(), rand()*1000000 from test;}}
> # {{select count\(*) from test; – this will cause uncommitted data to sent
> to the server.}}
> # Goto #4 a few time (until you inserted 131072 rows)
> # {{!commit}}
> In a separate sqlline session just repeat after the commit was issued in the
> other session.
> * {{select count\(*) from test;}}
> You'll see that number will change until it finally settles.
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