update documentation and action.yml

action.yml

@@ -59,8 +59,8 @@ inputs:
     description: 'Workaround to pass job status to post job step. This variable is not intended for manual setting'
     default: ${{ job.status }}
   token:
-    description: Used to pull java versions from setup-java. Since there is a default value, token is typically not supplied by the user.
-    default: ${{ github.token }}
+    description: Used to pull java versions from setup-java. Since there is a default value, token is typically not supplied by the user. When running this action on github.com, the default value is sufficient. When running on GHES, you can pass a personal access token for github.com if you are experiencing rate limiting.
+    default: ${{ github.server_url == 'https://github.com' && github.token || '' }}
   mvn-toolchain-id:
     description: 'Name of Maven Toolchain ID if the default name of "${distribution}_${java-version}" is not wanted. See examples of supported syntax in Advanced Usage file'
     required: false

docs/advanced-usage.md

@@ -80,6 +80,22 @@ steps:
 - run: java -cp java HelloWorldApp
 ```
 
+### Using Microsoft distribution on GHES
+
+`setup-java` comes pre-installed on the appliance with GHES if Actions is enabled. When dynamically downloading Microsoft Build of OpenJDK distribution, `setup-java` makes request to `actions/setup-java` to get available versions on github.com (outside of the appliance). These calls to `actions/setup-java` are made via unauthenticated requests, which are limited to [60 requests per hour per IP](https://docs.github.com/en/rest/overview/resources-in-the-rest-api#rate-limiting). If more requests are made within the time frame, then you will start to see rate-limit errors during downloading that looks like: `##[error]API rate limit exceeded for...`.
+
+To get a higher rate limit, you can [generate a personal access token on github.com](https://github.com/settings/tokens/new) and pass it as the `token` input for the action:
+
+```yaml
+uses: actions/setup-java@v3
+with:
+  token: ${{ secrets.GH_DOTCOM_TOKEN }}
+  distribution: 'microsoft'
+  java-version: '11'
+```
+
+If the runner is not able to access github.com, any Go versions requested during a workflow run must come from the runner's tool cache. See "[Setting up the tool cache on self-hosted runners without internet access](https://docs.github.com/en/enterprise-server@3.2/admin/github-actions/managing-access-to-actions-from-githubcom/setting-up-the-tool-cache-on-self-hosted-runners-without-internet-access)" for more information.
+
 ### Amazon Corretto
 **NOTE:** Amazon Corretto only supports the major version specification.