Share optional MCP startup grace across connection sets - #36011
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## Why Each connection set could restart the one-second startup grace for the same cacheable optional MCP server, repeatedly delaying catalog capture while that server was still pending. ## What changed - Store the optional startup deadline in the shared tool catalog cache entry. - Reuse that deadline until a catalog is published, and allow a fresh grace period after the cached catalog expires. - Preserve per-connection-set startup grace for servers that disable catalog caching. ## Testing Added a paused-time test covering shared deadlines, immediate cached-tool reuse, cache expiration, and disabled caching. GitOrigin-RevId: 3494969ee7002c70ce9e4ffd370e46a22d38cc11
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Share optional MCP startup grace across connection sets
Why
Each connection set could restart the one-second startup grace for the same
cacheable optional MCP server, repeatedly delaying catalog capture while that
server was still pending.
What changed
period after the cached catalog expires.
caching.
Testing
Added a paused-time test covering shared deadlines, immediate cached-tool reuse,
cache expiration, and disabled caching.