[BEAM-10471] Failure / flake in CassandraIOTest > testEstimatedSizeBytes

• Type: Bug
• Status: Resolved
• Priority: P1
• Resolution: Fixed
• Fix Version/s: Missing
• Component/s: io-java-cassandra
• Labels: flake
• Assignee: Etienne Chauchot
• Reporter: Kenneth Knowles
• Created: 13/Jul/20 19:12
• Updated: 13/Jan/22 21:49
• Resolved: 15/May/21 17:58

Description

https://ci-beam.apache.org/job/beam_PreCommit_Java_Commit/12328/testReport/junit/org.apache.beam.sdk.io.cassandra/CassandraIOTest/testEstimatedSizeBytes/

AssertionError with no error message. Please give a meaningful error message. Preferably do not use assertTrue and other less meaningful asserters.

Digging into the code, it is a bounds check that the estimated bytes are +/- 10% of expected, since the result is nondeterministic. It fell outside of the range but since the assertion is written as assertTrue we do not see the actual value.

https://github.com/apache/beam/blob/66bcc9a967746cad12dfdeed473fb60c77033514/sdks/java/io/cassandra/src/test/java/org/apache/beam/sdk/io/cassandra/CassandraIOTest.java#L291

Issue Links

• links to: GitHub Pull Request #12276
• links to: GitHub Pull Request #12432
• links to: GitHub Pull Request #12510