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https://issues.apache.org/jira/browse/CAMEL-24687?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Federico Mariani reassigned CAMEL-24687:
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Assignee: Federico Mariani
> camel-quickjs - every evaluation leaks a QuickJS module; 8 threads exhaust a
> 1 GB heap in 22 seconds
> ----------------------------------------------------------------------------------------------------
>
> Key: CAMEL-24687
> URL: https://issues.apache.org/jira/browse/CAMEL-24687
> Project: Camel
> Issue Type: Bug
> Affects Versions: 4.23.0
> Reporter: Federico Mariani
> Assignee: Federico Mariani
> Priority: Major
>
> QuickJS4J executes a module per {{invokeGuestFunction}} call and QuickJS
> keeps evaluated modules until its context is freed, so a camel-quickjs engine
> grows by about 12 KB of WebAssembly memory per evaluation and never shrinks.
> Reproduced twice with the 8-thread load test of the benchmark branch
> ({{GroovyLoadTest}}, variant {{quickjs}}, {{-Xms1g -Xmx1g}}): heap after
> young GC 496 MB at 5 s, 939 MB at 20 s, then {{java.lang.OutOfMemoryError}}
> in the producer threads at ~22 s, at about 4,000 msg/s. The GC log shows 919
> MB live after a full GC, i.e. it is retained, not garbage.
> Proposed fix (implemented, tested, benchmarked): keep a handle on the
> engine's linear memory through the Endive memory factory and recycle a worker
> thread's engine (close it, create a fresh one on the next evaluation) once
> its memory exceeds {{engineMaxMemory}} (default 64 MB) or it has run
> {{engineMaxEvaluations}} (default 50,000) evaluations. With that, the same
> 5-minute run completes at 8,858 msg/s with no full GC and a stable heap. An
> upstream quickjs4j issue (a way to invoke a compiled function without
> re-evaluating a module) would remove the need for recycling.
> Related: CAMEL-23398 (component), apache/camel#25778.
> ----
> _Found during a benchmark review of camel-groovy and the other scripting
> languages (camel-performance-tests branch camel-groovy-perf,
> tests/camel-jmh/groovy-results, JMH 1.37, JDK 21, one M1 Pro laptop). A
> candidate fix with tests exists on the local apache/camel branch
> camel-perf-all-fixes; a PR follows._
> _Claude Code on behalf of Croway_
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