[CASSANDRA-16852] testsome fails in the CircleCI multiplexer because the class JStackJUnitTask can't be found

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 3.0.26, 3.11.12
• Component/s: CI
• Bug Category: Degradation
• Severity: Low
• Complexity: Normal
• Discovered By: User Report
• Platform: All
• Since Version: 3.0.25

Source Control Link

https://github.com/apache/cassandra/commit/07706662104fd7d471379a5ba1155c7e4fb71618

Test and Documentation Plan

We can test this by getting a successful utest multiplexer run

• Assignee: Andres de la Peña
• Reporter: Ekaterina Dimitrova

Authors

Andres de la Peña

Reviewers

Ekaterina Dimitrova

• Created: 12/Aug/21 21:49
• Updated: 10/Nov/21 15:47
• Resolved: 16/Aug/21 17:03

Description

As adelapena explained on CASSANDRA-16827, the problem might be in the flag -Dno-build-test=true that the multiplexer uses to not run build-test in every iteration, relying on that this has already been done by the build task. This is a performance optimisation that can be especially effective in fast tests.
It would be ideal to have the initial multiplexer behavior restored, but we can always run ant build-test at the beginning of every multiplexer runner while still not running it on every iteration. This seems enough to keep the multiplexer working but it requires some extra builds and therefore higher costs.

The goal of this ticket is to find the root of this failure and fix the multiplexer either by restoring its initial flow or adding ant build-test at the beginning of every multiplexer runner, if there is no more effective solution.

Issue Links

• Discovered while testing: CASSANDRA-16836 Materialized views incorrect quoting of UDF