Switch to Java 11

.gitignore

@@ -2,6 +2,9 @@
 target/
 !.mvn/wrapper/maven-wrapper.jar
 
+# Jenv
+.java-version
+
 # Eclipse
 .settings/
 .classpath

docker-compose.yml

@@ -14,7 +14,7 @@ services:
     mem_limit: 512M
     depends_on:
       - config-server
-    entrypoint: ["./dockerize","-wait=tcp://config-server:8888","-timeout=60s","--","java", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
+    entrypoint: ["./dockerize","-wait=tcp://config-server:8888","-timeout=60s","--","java", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
     ports:
      - 8761:8761
 
@@ -25,7 +25,7 @@ services:
     depends_on:
      - config-server
      - discovery-server
-    entrypoint: ["./dockerize","-wait=tcp://discovery-server:8761","-timeout=60s","--","java", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
+    entrypoint: ["./dockerize","-wait=tcp://discovery-server:8761","-timeout=60s","--","java", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
     ports:
     - 8081:8081
 
@@ -36,7 +36,7 @@ services:
     depends_on:
      - config-server
      - discovery-server
-    entrypoint: ["./dockerize","-wait=tcp://discovery-server:8761","-timeout=60s","--","java", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
+    entrypoint: ["./dockerize","-wait=tcp://discovery-server:8761","-timeout=60s","--","java", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
     ports:
      - 8082:8082
 
@@ -47,7 +47,7 @@ services:
     depends_on:
      - config-server
      - discovery-server
-    entrypoint: ["./dockerize","-wait=tcp://discovery-server:8761","-timeout=60s","--","java", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
+    entrypoint: ["./dockerize","-wait=tcp://discovery-server:8761","-timeout=60s","--","java", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
     ports:
      - 8083:8083
 
@@ -58,7 +58,7 @@ services:
     depends_on:
      - config-server
      - discovery-server
-    entrypoint: ["./dockerize","-wait=tcp://discovery-server:8761","-timeout=60s","--","java", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
+    entrypoint: ["./dockerize","-wait=tcp://discovery-server:8761","-timeout=60s","--","java", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
     ports:
      - 8080:8080
 
@@ -78,7 +78,7 @@ services:
     depends_on:
      - config-server
      - discovery-server
-    entrypoint: ["./dockerize","-wait=tcp://discovery-server:8761","-timeout=60s","--","java", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
+    entrypoint: ["./dockerize","-wait=tcp://discovery-server:8761","-timeout=60s","--","java", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
     ports:
      - 9090:9090
 
@@ -89,7 +89,7 @@ services:
     depends_on:
      - config-server
      - discovery-server
-    entrypoint: ["./dockerize","-wait=tcp://discovery-server:8761","-timeout=60s","--","java", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
+    entrypoint: ["./dockerize","-wait=tcp://discovery-server:8761","-timeout=60s","--","java", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
     ports:
      - 7979:7979
 

docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM openjdk:8-jre-alpine
+FROM openjdk:11-jre
 VOLUME /tmp
 ARG DOCKERIZE_VERSION
 ARG ARTIFACT_NAME
@@ -11,4 +11,4 @@ RUN chmod +x dockerize
 ADD ${ARTIFACT_NAME}.jar /app.jar
 RUN touch /app.jar
 EXPOSE ${EXPOSED_PORT}
-ENTRYPOINT ["java", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
+ENTRYPOINT ["java", "-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

spring-petclinic-api-gateway/pom.xml

@@ -158,7 +158,8 @@
                         <artifactId>bootstrap</artifactId>
                         <version>${webjars-bootstrap.version}</version>
                     </dependency>
-                    <!-- Some tweak for wro4j 1.8 compatibility with Java 9+-->
+                    <!-- Some tweak for wro4j 1.8 compatibility with Java 9+ -->
+                    <!-- See https://github.com/wro4j/wro4j/issues/1039 -->
                     <dependency>
                         <groupId>org.mockito</groupId>
                         <artifactId>mockito-core</artifactId>

spring-petclinic-discovery-server/pom.xml

@@ -48,6 +48,12 @@
             <artifactId>junit-jupiter-engine</artifactId>
             <scope>test</scope>
         </dependency>
+
+        <!-- JAXB is required since Java 9 -->
+        <dependency>
+            <groupId>org.glassfish.jaxb</groupId>
+            <artifactId>jaxb-runtime</artifactId>
+        </dependency>
     </dependencies>
 
     <profiles>