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https://issues.apache.org/jira/browse/CAMEL-24609?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on CAMEL-24609 started by Andrea Cosentino.
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> camel-langchain4j-agent: the managed tool-execution executor is not recreated
> after a stop/start cycle
> ------------------------------------------------------------------------------------------------------
>
> Key: CAMEL-24609
> URL: https://issues.apache.org/jira/browse/CAMEL-24609
> Project: Camel
> Issue Type: Bug
> Components: camel-langchain4j-agent
> Reporter: Andrea Cosentino
> Assignee: Andrea Cosentino
> Priority: Major
> Fix For: 4.23.0
>
>
> LangChain4jAgentProducer creates a Camel-managed thread pool in doInit
> (resolveExecuteToolsConcurrentlyExecutor) for the inline-agent +
> executeToolsConcurrently=true case with no user-supplied executor, and bakes
> it into the agent's AgentConfiguration (the agent is built once in doInit).
> doStop shuts that executor down (shutdownGraceful) and nulls the field, but
> doStart only rebuilds the materialized MCP clients - it does not recreate the
> executor, and the agent still references the terminated one.
> After a route/producer stop then start, concurrent tool execution therefore
> fails with RejectedExecutionException. The MCP clients are handled correctly
> (rebuilt in doStart), so the executor is the odd one out.
> Fix: tear the managed executor down in doShutdown instead of doStop so it
> lives for the agent's doInit-to-doShutdown lifetime (recreating it in doStart
> would not help, since the already-built agent holds the reference).
> _Reported by an automated functional audit._
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