Add CHANGELOG.md for #3811.

CHANGELOG.md

@@ -7,6 +7,9 @@ The version headers in this history reflect the versions of Apollo Server itself
 
 ### v2.12.0
 
+- `apollo-server-core`: When operating in gateway mode using the `gateway` property of the Apollo Server constructor options, the failure to initialize a schema during initial start-up, e.g. connectivity problems, will no longer result in the federated executor from being assigned when the schema eventually becomes available.  This precludes a state where the gateway may never become available to serve federated requests, even when failure conditions are no longer present. [PR #3811](https://github.com/apollographql/apollo-server/pull/3811)
+- `apollo-server-core`: Prevent a condition which prefixed an error message on each request when the initial gateway initialization resulted in a Promise-rejection which was memoized and re-prepended with `Invalid options provided to ApolloServer:` on each request. [PR #3811](https://github.com/apollographql/apollo-server/pull/3811)
+
 ### v2.11.0
 
 - The range of accepted `peerDepedencies` versions for `graphql` has been widened to include `graphql@^15.0.0-rc.2` so as to accommodate the latest release-candidate of the `graphql@15` package, and an intention to support it when it is finally released on the `latest` npm tag.  While this change will subdue peer dependency warnings for Apollo Server packages, many dependencies from outside of this repository will continue to raise similar warnings until those packages own `peerDependencies` are updated.  It is unlikely that all of those packages will update their ranges prior to the final version of `graphql@15` being released, but if everything is working as expected, the warnings can be safely ignored. [PR #3825](https://github.com/apollographql/apollo-server/pull/3825)

packages/apollo-federation/CHANGELOG.md

@@ -1,5 +1,9 @@
 # CHANGELOG for `@apollo/federation`
 
+## 0.14.0
+
+- Only changes in the similarly versioned `@apollo/gateway` package.
+
 ## 0.13.2
 
 - Only changes in the similarly versioned `@apollo/gateway` package.

packages/apollo-gateway/CHANGELOG.md

@@ -1,4 +1,10 @@
-# CHANGELOG for `@apollo/gateway`
+# CHANGELOG for `@apollo/gatewae`
+
+## 0.14.0 (pre-release; `@next` tag)
+
+- Several previously unhandled Promise rejection errors stemming from, e.g. connectivity, failures when communicating with Apollo Graph Manager within asynchronous code are now handled. [PR #3811](https://github.com/apollographql/apollo-server/pull/3811)
+- Provide a more helpful error message when encountering expected errors. [PR #3811](https://github.com/apollographql/apollo-server/pull/3811)
+- General improvements and clarity to error messages and logging. [PR #3811](https://github.com/apollographql/apollo-server/pull/3811)
 
 ## 0.13.2