error-prone-support/integration-tests/metrics-init.patch

--- a/metrics-jakarta-servlets/src/main/java/io/dropwizard/metrics5/servlets/MetricsServlet.java
+++ b/metrics-jakarta-servlets/src/main/java/io/dropwizard/metrics5/servlets/MetricsServlet.java
@@ -188,6 +188,9 @@ public class MetricsServlet extends HttpServlet {
         return mapper.writer();
     }
 
+    // Here `value` may be `null`, while `TimeUnit#valueOf` requires a non-`null` argument.
+    // XXX: Investigate better nullness handling by `IdentityConversion`.
+    @SuppressWarnings("IdentityConversion")
     protected TimeUnit parseTimeUnit(String value, TimeUnit defaultValue) {
         try {
             return TimeUnit.valueOf(String.valueOf(value).toUpperCase(Locale.US));
--- a/metrics-servlets/src/main/java/io/dropwizard/metrics5/servlets/MetricsServlet.java
+++ b/metrics-servlets/src/main/java/io/dropwizard/metrics5/servlets/MetricsServlet.java
@@ -188,6 +188,9 @@ public class MetricsServlet extends HttpServlet {
         return mapper.writer();
     }
 
+    // Here `value` may be `null`, while `TimeUnit#valueOf` requires a non-`null` argument.
+    // XXX: Investigate better nullness handling by `IdentityConversion`.
+    @SuppressWarnings("IdentityConversion")
     protected TimeUnit parseTimeUnit(String value, TimeUnit defaultValue) {
         try {
             return TimeUnit.valueOf(String.valueOf(value).toUpperCase(Locale.US));
--- a/pom.xml
+++ b/pom.xml
@@ -136,6 +136,27 @@
         </repository>
     </distributionManagement>
 
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>com.google.errorprone</groupId>
+                <artifactId>error_prone_annotations</artifactId>
+                <version>${error-prone.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>com.google.guava</groupId>
+                <artifactId>guava</artifactId>
+                <version>33.4.0-jre<!-- Renovate: com.google.guava:guava-bom --></version>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+    <dependencies>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+        </dependency>
+    </dependencies>
+
     <profiles>
         <profile>
             <id>jdk8</id>
@@ -218,7 +239,9 @@
                             <compilerArgs>
                                 <arg>-Xlint:all</arg>
                                 <arg>-XDcompilePolicy=simple</arg>
-                                <arg>-Xplugin:ErrorProne -XepExcludedPaths:.*/target/generated-sources/.*</arg>
+                                <!-- XXX: Drop this flag once the project uses Error Prone 2.36.0+ by default. -->
+                                <arg>--should-stop=ifError=FLOW</arg>
+                                <arg>-Xplugin:ErrorProne ${error-prone.configuration-args}</arg>
                                 <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED</arg>
                                 <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED</arg>
                                 <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED</arg>
@@ -229,12 +252,24 @@
                                 <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED</arg>
                                 <arg>-J--add-opens=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED</arg>
                                 <arg>-J--add-opens=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED</arg>
+                                <arg>-Xmaxwarns</arg>
+                                <arg>1000000</arg>
                             </compilerArgs>
                             <annotationProcessorPaths>
                                 <path>
                                     <groupId>com.google.errorprone</groupId>
                                     <artifactId>error_prone_core</artifactId>
-                                    <version>${errorprone.version}</version>
+                                    <version>${error-prone.version}</version>
+                                </path>
+                                <path>
+                                    <groupId>tech.picnic.error-prone-support</groupId>
+                                    <artifactId>error-prone-contrib</artifactId>
+                                    <version>${error-prone-support.version}</version>
+                                </path>
+                                <path>
+                                    <groupId>tech.picnic.error-prone-support</groupId>
+                                    <artifactId>refaster-runner</artifactId>
+                                    <version>${error-prone-support.version}</version>
                                 </path>
                             </annotationProcessorPaths>
                         </configuration>
@@ -364,7 +399,7 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <release>8</release>
+                    <release>11</release>
                     <fork>true</fork>
                     <parameters>true</parameters>
                     <showWarnings>true</showWarnings>