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https://issues.apache.org/jira/browse/CASSANDRA-20449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17936349#comment-17936349
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Caleb Rackliffe commented on CASSANDRA-20449:
---------------------------------------------
This almost certainly applies to 5.0, but need to check 4.1 and 4.0 as well...
> Serialization can lose complex deletions in a mutation with multiple
> collections in a row
> -----------------------------------------------------------------------------------------
>
> Key: CASSANDRA-20449
> URL: https://issues.apache.org/jira/browse/CASSANDRA-20449
> Project: Apache Cassandra
> Issue Type: Bug
> Components: Legacy/Local Write-Read Paths, Local/Commit Log
> Reporter: Caleb Rackliffe
> Assignee: Caleb Rackliffe
> Priority: Normal
>
> Here's a quick way to show that {{Mutation}} serialization can lose a complex
> deletion that accompanies a collection replacement:
> {noformat}
> @BeforeClass
> public static void setUpCluster() throws IOException
> {
> CLUSTER = init(Cluster.build(2).withConfig(config ->
> config.set("hinted_handoff_enabled",
> false).with(GOSSIP).with(NETWORK)).start());
> }
> @Test
> public void testMultipleSetsComplexDeletion()
> {
> CLUSTER.schemaChange(withKeyspace("CREATE TABLE %s.multi_collection (k
> int, c int, s1 set<int>, s2 set<int>, s3 set<int>, PRIMARY KEY (k, c)) WITH
> read_repair = 'NONE'"));
> CLUSTER.coordinator(1).execute(withKeyspace("INSERT INTO
> %s.multi_collection (k, c, s1, s2, s3) VALUES (?, ?, ?, ?, ?)"),
> ConsistencyLevel.ALL, 0, 0, set(1), set(1), set(1));
> CLUSTER.coordinator(1).execute(withKeyspace("UPDATE %s.multi_collection
> SET s2 = ?, s1 = s1 + ?, s3 = s3 + ? WHERE k = ? AND c = ?"),
> ConsistencyLevel.ALL, set(2), set(2), set(2), 0, 0);
> String select = withKeyspace("SELECT k, c, s1, s2, s3 FROM
> %s.multi_collection");
> assertRows(CLUSTER.get(1).executeInternal(select), row(0, 0, set(1, 2),
> set(2), set(1, 2)));
> assertRows(CLUSTER.get(2).executeInternal(select), row(0, 0, set(1, 2),
> set(2), set(1, 2)));
> }
> {noformat}
> Node 1 loses the complex deletion during serialization, sends that to node 2,
> and node 2 things the {{s2}} set replacement is an append/update.
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