[CALCITE-2566] Certain rules might cause class initialization deadlock due to sub-class referenced in <clinit>

• Type: Bug
• Status: Open
• Priority: Critical
• Resolution: Unresolved
• Affects Version/s: 1.17.0
• Component/s: core
• Assignee: Unassigned
• Reporter: Vladimir Sitnikov
• Created: 16/Sep/18 18:29
• Updated: 28/Feb/24 06:03

Description

List of impacted classes: AbstractMaterializedViewRule, ClassDeclarationFinder, FilterJoinRule, ProjectToWindowRule, ReduceExpressionsRule, SemiJoinRule, SqlDialect, SubQueryRemoveRule

The problem is super-class <clinit> references sub-class.

The sad thing is those fields are public.

Example: https://github.com/apache/calcite/blob/323200507b72fec152e2f557b3f7f2209a042fe4/core/src/main/java/org/apache/calcite/rel/rules/AbstractMaterializedViewRule.java#L113