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https://issues.apache.org/jira/browse/CAMEL-25076?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on CAMEL-25076 started by Claus Ibsen.
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> camel-mcp-server - stdio: adding a tool fails when stdin is closed, which
> breaks StdioMcpServerEngineTest
> ---------------------------------------------------------------------------------------------------------
>
> Key: CAMEL-25076
> URL: https://issues.apache.org/jira/browse/CAMEL-25076
> Project: Camel
> Issue Type: Bug
> Components: camel-mcp-server
> Reporter: Claus Ibsen
> Assignee: Claus Ibsen
> Priority: Minor
>
> With the stdio transport (StdioMcpServerEngine), adding an ai-tool route
> fails once stdin has been closed (the client went away):
> McpSyncServer.addTool registers the tool and then notifies the client that
> the tool list changed, and that notification fails with RuntimeException:
> Failed to enqueue message, as the SDK closes the outbound side of the session
> when stdin ends. The exception fails CamelContext startup or the added route.
> StdioMcpServerEngineTest uses an empty stdin, so it races with this and now
> fails consistently (it breaks CI of PRs that build camel-mcp-server).
> Fix: the tool is registered either way, so a failed notification is logged as
> a WARN instead of failing the route. Invalid tools
> (IllegalArgumentException/IllegalStateException) still fail.
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