[CASSANDRA-15899] Dropping a column can break queries until the schema is fully propagated

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 3.0.23, 3.11.9, 4.0-beta3, 4.0
• Component/s: Cluster/Schema
• Bug Category: Correctness - Transient Incorrect Response
• Severity: Normal
• Complexity: Normal
• Discovered By: Unit Test
• Platform: All
• Since Version: 3.0.0

Source Control Link

https://github.com/apache/cassandra/commit/31b9078a691a6f93b104cc6b3f72fe2fbf6557f6

Test and Documentation Plan

in-jvm dtests

• Assignee: Blake Eggleston
• Reporter: Marcus Eriksson

Authors

Blake Eggleston

Reviewers

Sam Tunnicliffe

• Created: 24/Jun/20 07:50
• Updated: 03/Jan/21 17:03
• Resolved: 06/Oct/20 17:16

Description

With a table like:

CREATE TABLE ks.tbl (id int primary key, v1 int, v2 int, v3 int)

and we drop v2, we get this exception on the replicas which haven't seen the schema change:

ERROR [SharedPool-Worker-1] node2 2020-06-24 09:49:08,107 AbstractLocalAwareExecutorService.java:169 - Uncaught exception on thread Thread[SharedPool-Worker-1,5,node2]
java.lang.IllegalStateException: [ColumnDefinition{name=v1, type=org.apache.cassandra.db.marshal.Int32Type, kind=REGULAR, position=-1}, ColumnDefinition{name=v2, type=org.apache.cassandra.db.marshal.Int32Type, kind=REGULAR, position=-1}, ColumnDefinition{name=v3, type=org.apache.cassandra.db.marshal.Int32Type, kind=REGULAR, position=-1}] is not a subset of [v1 v3]
	at org.apache.cassandra.db.Columns$Serializer.encodeBitmap(Columns.java:546) ~[main/:na]
	at org.apache.cassandra.db.Columns$Serializer.serializeSubset(Columns.java:478) ~[main/:na]
	at org.apache.cassandra.db.rows.UnfilteredSerializer.serialize(UnfilteredSerializer.java:184) ~[main/:na]
	at org.apache.cassandra.db.rows.UnfilteredSerializer.serialize(UnfilteredSerializer.java:114) ~[main/:na]
	at org.apache.cassandra.db.rows.UnfilteredSerializer.serialize(UnfilteredSerializer.java:102) ~[main/:na]
	at org.apache.cassandra.db.rows.UnfilteredRowIteratorSerializer.serialize(UnfilteredRowIteratorSerializer.java:132) ~[main/:na]
	at org.apache.cassandra.db.rows.UnfilteredRowIteratorSerializer.serialize(UnfilteredRowIteratorSerializer.java:87) ~[main/:na]
...

Note that it doesn't matter if we SELECT * or SELECT id, v1