Ke Han created CASSANDRA-18091:
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Summary: Column update lost after a full stop upgrade from 4.0.6
to trunk (4.2:fdc88a)
Key: CASSANDRA-18091
URL: https://issues.apache.org/jira/browse/CASSANDRA-18091
Project: Cassandra
Issue Type: Bug
Reporter: Ke Han
When we performed a full-stop upgrade from release 4.0.6 to 4.2 trunk (fdc88a),
we executed the same read command before and after the upgrade and found that
some column updates were lost after the upgrade.
This inconsistency is likely related to timing. We cannot reproduce this case
{*}deterministically{*}. But if we keep executing the same following command
sequence, this bug can be triggered every ten times.
Steps to reproduce:
1. Set up a 4.0.6 3-node cluster. (N0: seed node, N1, N2). Default
configurations, set num_tokens to 256.
2. Execute the following cqlsh command
{code:java}
CREATE KEYSPACE uuid5f86250110a247d48c481c5579cb2ea1 WITH REPLICATION = {
'class' : 'SimpleStrategy', 'replication_factor' : 1 };
CREATE TABLE uuid5f86250110a247d48c481c5579cb2ea1.kattmG (kattmG TEXT,VldG
TEXT,Ajqm TEXT,lTQSQ INT,EVzlSKrbkUGyhJshH TEXT, PRIMARY KEY (lTQSQ ));
CREATE KEYSPACE IF NOT EXISTS uuidc5b00efccc77471888e6e8e233998779 WITH
REPLICATION = { 'class' : 'SimpleStrategy', 'replication_factor' : 2 };
DELETE FROM uuid5f86250110a247d48c481c5579cb2ea1.kattmG WHERE lTQSQ = 2;
ALTER TABLE uuid5f86250110a247d48c481c5579cb2ea1.kattmG DROP kattmG ;
INSERT INTO uuid5f86250110a247d48c481c5579cb2ea1.kattmG (Ajqm,
EVzlSKrbkUGyhJshH, lTQSQ) VALUES
('nZJzNjYnXOwPLpVoFSVwxcvznsDFBYqmlprrVXYJQLzYvYkrmfEsiuAcCtggypnxIkIevRHyPQGOWrIZNObJ','RaAhbVKUQzgJaupaupKPVnNLLYDaZEaMyFteVwhLePqZwikuBEsVDxTuTqBfkFYmeMMsOFXjVkObZduPfAFsLzuYlrgpYsPPxDNQCRzzPaEdWHARnnWbAFAUUnbYnvEESeHDRHSkEhSnoREprrHWasYLMSocIYiMGQXjzsaKptqbtPgrztIdpQLgDAZOPfhJIblmwTFAWiFbzrbTkFwJGP',1693380861);
DELETE FROM uuid5f86250110a247d48c481c5579cb2ea1.kattmG WHERE lTQSQ =
1693380861;
INSERT INTO uuid5f86250110a247d48c481c5579cb2ea1.kattmG (lTQSQ) VALUES (2);
ALTER TABLE uuid5f86250110a247d48c481c5579cb2ea1.kattmG DROP VldG ;
INSERT INTO uuid5f86250110a247d48c481c5579cb2ea1.kattmG (lTQSQ) VALUES
(1693380861);
INSERT INTO uuid5f86250110a247d48c481c5579cb2ea1.kattmG (Ajqm, lTQSQ) VALUES
('ldrsHa',1693380861);
ALTER TABLE uuid5f86250110a247d48c481c5579cb2ea1.kattmG DROP Ajqm ; {code}
3. Execute a `SELECT` command at N0, get result
{code:java}
SELECT lTQSQ FROM uuid5f86250110a247d48c481c5579cb2ea1.kattmG;
ltqsq
------------
1693380861
2
(2 rows){code}
4. Perform a full-stop upgrade. (Set num_tokens to 256)
1. Drain N0, stop N0.
2. Drain N1, stop N1.
3. Drain N2, stop N2.
4. Start up N0.
5. Start up N1.
6. Start up N2.
5. Execute the same `SELECT` command at N0, get result
{code:java}
SELECT lTQSQ FROM uuid5f86250110a247d48c481c5579cb2ea1.kattmG;
ltqsq
-------
2
(1 rows){code}
Or
{code:java}
SELECT lTQSQ FROM uuid5f86250110a247d48c481c5579cb2ea1.kattmG;
ltqsq
-------
(0 rows){code}
The new result is inconsistent with the old version.
Is this an expected behaviour during the full-stop upgrade?
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