Docs: Add MP Metrics API in some cases

(cherry picked from commit 58ff626)
gsmet · Apr 3, 2021 · c5fdfb0 · c5fdfb0
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diff --git a/docs/src/main/asciidoc/micrometer.adoc b/docs/src/main/asciidoc/micrometer.adoc
@@ -431,6 +431,16 @@ public MeterFilter renameApplicationMeters() {
 }
 ----
 
+Ensure the following dependency is present in your `pom.xml` file if you require the Microprofile Metrics API:
+
+[source,xml]
+----
+<dependency>
+  <groupId>org.eclipse.microprofile.metrics</groupId>
+  <artifactId>microprofile-metrics-api</artifactId>
+</dependency>
+----
+
 NOTE: The MP Metrics API compatibility layer will be moved to a different extension in the future.
 
 == Configuration Reference

diff --git a/docs/src/main/asciidoc/smallrye-graphql.adoc b/docs/src/main/asciidoc/smallrye-graphql.adoc
@@ -849,6 +849,21 @@ When `SomeBusinessException` occurs, the error output will contain the Error cod
 
 <1> The error code
 
+== Additional Notes
+
+If you are using the `smallrye-graphql` extension and the `micrometer` metrics extension is present and metrics are
+enabled, you may encounter a `java.lang.NoClassDefFoundError` as some versions of the `smallrye-graphql` extension
+have runtime requirements on the Microprofile Metrics API.  Add the following Microprofile Metrics API dependency
+to resolve the issue:
+
+[source,xml]
+----
+<dependency>
+  <groupId>org.eclipse.microprofile.metrics</groupId>
+  <artifactId>microprofile-metrics-api</artifactId>
+</dependency>
+----
+
 == Conclusion
 
 SmallRye GraphQL enables clients to retrieve the exact data that is