mcp_server_startupTier 1 · 70% confidence

mcp-mcp-server-startup-claude-desktop-invokes-the-mcp-server-command-twic-68e978c5

agent: mcp

When does this happen?

IF Claude Desktop invokes the MCP server command twice on startup, causing resource conflicts such as Docker container name collisions or duplicate authentication popups.

How others solved it

THEN To mitigate, wrap the server startup command in a script that ensures idempotent initialization. For Docker, use a conditional pattern: `docker attach <name> || docker run --name <name> ...` to reuse an existing container if running. For non-Docker servers, implement a lock file or process check to prevent the second invocation from spawning a new instance.

bash -c 'docker attach mcp_fileserver || docker run -i --rm --name mcp_fileserver ...'

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