[CASSANDRA-19704] UnsupportedOperationException is thrown when no space for LCS

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 4.0.14, 4.1.6, 5.0, 5.1
• Component/s: Local/Compaction/LCS
• Bug Category: Degradation - Resource Management
• Severity: Normal
• Complexity: Normal
• Discovered By: User Report
• Platform: All
• Since Version: 4.0

Source Control Link

https://github.com/apache/cassandra/commit/d54646e40957ffc18f651753941fac3068b79f8e

Test and Documentation Plan

new test that reproduces the UOE in the description

• Assignee: Caleb Rackliffe
• Reporter: Zhao Yang

Authors

Caleb Rackliffe

Reviewers

Marcus Eriksson, Zhao Yang

• Created: 14/Jun/24 00:30
• Updated: 02/Jul/24 20:16
• Resolved: 02/Jul/24 20:12

Description

In CompactionTask#buildCompactionCandidatesForAvailableDiskSpace with LCS, if node has limited disk space and can't remove any sstable from L0 or L1 in LeveledCompactionTask#reduceScopeForLimitedSpace, LeveledCompactionTask#partialCompactionsAcceptable will throw UnsupportedOperationException.

We should handle LeveledCompactionTask#partialCompactionsAcceptable more gracefully with return level <= 1 or simply true since reduceScopeForLimitedSpace only removes sstable from L0 or L1.

Related https://issues.apache.org/jira/browse/CASSANDRA-17272

Issue Links

• links to: GitHub Pull Request #3385
• links to: GitHub Pull Request #3386
• links to: GitHub Pull Request #3387
• links to: GitHub Pull Request #3388