[CASSANDRA-18847] Test failure: org.apache.cassandra.db.RangeTombstoneTest#overlappingRangeTest

• Type: Bug
• Status: Open
• Priority: Normal
• Resolution: Unresolved
• Fix Version/s: 4.1.x, 5.0.x
• Component/s: Test/unit
• Bug Category: Correctness - Test Failure
• Severity: Normal
• Complexity: Normal
• Discovered By: User Report
• Platform: All
• Assignee: Unassigned
• Reporter: Andres de la Peña
• Created: 13/Sep/23 12:04
• Updated: 13/Sep/23 14:57

Description

The unit test org.apache.cassandra.db.RangeTombstoneTest#overlappingRangeTest seems to be flaky at least on 4.1 and 5.0:

• 4.1: https://app.circleci.com/pipelines/github/adelapena/cassandra/3206/workflows/e43a16ff-5849-40e6-b78b-7f732d748b86/jobs/78331/tests
• 5.0: https://app.circleci.com/pipelines/github/adelapena/cassandra/3204/workflows/96c19c84-6acc-4f71-9805-5a451aca9eaf/jobs/77991/tests

java.lang.NullPointerException: Cannot invoke "org.apache.cassandra.db.rows.Row.hasLiveData(long, boolean)" because the return value of "org.apache.cassandra.db.partitions.Partition.getRow(org.apache.cassandra.db.Clustering)" is null
	at org.apache.cassandra.db.RangeTombstoneTest.overlappingRangeTest(RangeTombstoneTest.java:421)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

The repeated runs can be generated with:

.circleci/generate.sh -p -s -e REPEATED_UTESTS=org.apache.cassandra.db.RangeTombstoneTest -e REPEATED_UTESTS_COUNT=1000

The error seems to have a flakiness under 0.1%, and I haven't seen it on Butler.

Issue Links

• Discovered while testing: CASSANDRA-17578 Test failure: org.apache.cassandra.db.RangeTombstoneTest.testRangeTombstoneCompaction
• relates to: CASSANDRA-13936 RangeTombstoneTest (compressed) failure - assertTimes expected:<1000> but was:<999>