[CASSANDRA-13375] Cassandra v3.10 - UDA throws AssertionError when no records in select

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Duplicate
• Fix Version/s: 3.11.0
• Component/s: Legacy/CQL
• Severity: Normal
• Since Version: 3.10
• Assignee: Unassigned
• Reporter: Laurentiu Amitroaie
• Created: 24/Mar/17 08:59
• Updated: 16/Apr/19 09:30
• Resolved: 06/May/17 08:50

Description

If the aggregate function is used in a select which fetches no records there is a ServerError reported.

It seems the bug is in org.apache.cassandra.cql3.functions.UDAggregate, there is an "assert !needsInit;" done on compute.

Attached is a file which creates a keyspace / table / data records and UDF/UDA to replicate the issue.

Issue Links

• is duplicated by: CASSANDRA-13399 UDA fails without input rows