Alexandru Neaţă created CAMEL-19397: ---------------------------------------
Summary: SimpleLRUCache is not thread-safe
Key: CAMEL-19397
URL: https://issues.apache.org/jira/browse/CAMEL-19397
Project: Camel
Issue Type: Bug
Components: camel-core
Affects Versions: 4.0-M3, 3.20.5
Reporter: Alexandru Neaţă
SimpleLRUCache is not thread-safe, but it is used in various multi-threaded
places.
Examples are several
[IdempotentRepository][[https://github.com/apache/camel/blob/main/core/camel-api/src/main/java/org/apache/camel/spi/IdempotentRepository.java]|https://github.com/apache/camel/blob/main/core/camel-api/src/main/java/org/apache/camel/spi/IdempotentRepository.java]
implementations as:
*
[MemoryIdempotentRepository][https://github.com/apache/camel/blob/main/core/camel-support/src/main/java/org/apache/camel/support/processor/idempotent/MemoryIdempotentRepository.java#L41]
*
[FileIdempotentRepository][https://github.com/apache/camel/blob/main/core/camel-support/src/main/java/org/apache/camel/support/processor/idempotent/FileIdempotentRepository.java#L93]
*
[KafkaIdempotentRepository][[https://github.com/apache/camel/blob/camel-3.20.x/components/camel-kafka/src/main/java/org/apache/camel/processor/idempotent/kafka/KafkaIdempotentRepository.java#L269]]
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
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