[CAMEL-19397] SimpleLRUCache is not thread-safe

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Duplicate
• Affects Version/s: 3.20.5, 4.0-M3
• Component/s: camel-core
• Estimated Complexity: Unknown
• Assignee: Unassigned
• Reporter: Alexandru Neaţă
• Created: 28/May/23 10:17
• Updated: 28/May/23 10:39
• Resolved: 28/May/23 10:23

Description

SimpleLRUCache is not thread-safe, but it is used in various multi-threaded places. 

Examples are several IdempotentRepository implementations as:

• MemoryIdempotentRepository

• FileIdempotentRepository

• KafkaIdempotentRepository

The problem with these is that the size limit of the cache is not respected (we have a memory leak).

To reproduce the bug, the following sample project can be used: https://github.com/alex-nt/issues-java/tree/main/camel/kafka-idempotent

Discussion about the issue can be read here: https://camel.zulipchat.com/#narrow/stream/257298-camel/topic/Kafka.20idempotent.20Repository.20not.20threadsafe

Issue Links

• is fixed by: CAMEL-19295 Concurrency issues with dynamicMap in AbstractDynamicRegistry