JDK 17 Official support

Jenkinsfile

@@ -333,7 +333,7 @@ pipeline {
           axis {
             // the list of support java versions can be found in the infra repo (ansible/roles/java/defaults/main.yml)
             name 'JAVA_VERSION'
-            values 'openjdk12', 'openjdk13', 'openjdk14', 'openjdk17'
+            values 'openjdk17', 'openjdk18'
 
           }
         }

apm-agent-core/src/test/java/co/elastic/apm/agent/impl/metadata/ContainerInfoTest.java

@@ -20,8 +20,6 @@
 
 import co.elastic.apm.agent.util.CustomEnvVariables;
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.condition.DisabledOnJre;
-import org.junit.jupiter.api.condition.JRE;
 
 import javax.annotation.Nullable;
 
@@ -131,7 +129,6 @@ void testKubernetesInfo_containerd_cri() {
     }
 
     @Test
-    @DisabledOnJre({JRE.JAVA_15, JRE.JAVA_16}) // https://github.com/elastic/apm-agent-java/issues/1942
     void testKubernetesDownwardApi() throws Exception {
         String line = "1:name=systemd:/kubepods/besteffort/pode9b90526-f47d-11e8-b2a5-080027b9f4fb/15aa6e53-b09a-40c7-8558-c6c31e36c88a";
         String containerId = "15aa6e53-b09a-40c7-8558-c6c31e36c88a";

docs/supported-technologies.asciidoc

@@ -41,14 +41,14 @@ the agent does not capture transactions.
 === Java versions
 
 |===
-|Vendor |Supported versions | Notes
+|Vendor |Supported versions |Notes
 
 |Oracle JDK
-|7u60+, 8u40+, 9, 10, 11
+|7u60+, 8u40+, 11, 17
 |`--module-path` has not been tested yet
 
-|Open JDK
-|7u60+, 8u40+, 9, 10, 11
+|OpenJDK
+|7u60+, 8u40+, 11, 17
 |`--module-path` has not been tested yet
 
 |IBM J9 VM
@@ -64,7 +64,25 @@ the agent does not capture transactions.
 |
 |===
 
-NOTE: Early Java 8 versions before update 40 are *not supported* because they have
+==== Oracle & OpenJDK LTS
+
+For Oracle and OpenJDK, we provide *first-class* support for Long Term Support (LTS) releases as defined in https://www.oracle.com/java/technologies/java-se-support-roadmap.html[Oracle Java Support Roadmap]
+
+- LTS releases are supported __at least__ until they reach End-Of-Life status defined by the __End of Premier support__.
+- Non-LTS releases are supported __at least__ until they reach End-Of-Life.
+
+For Non-LTS releases, we provide a *best-effort* support:
+
+- Most Java versions work without any reported issue :  9, 10, 12, 13, 14 and 16
+- Few Java versions might have known issues: only 15 so far
+- They aren't as thoroughly and continuously tested for regressions
+
+The usual advice regarding which Java version to use still applies here: using a non-LTS or a version that reached
+End of Life is not recommended, especially in production.
+
+==== Early Java 8 and Java 7
+
+Early Java 8 versions before update 40 are *not supported* because they have
 several bugs that might result in JVM crashes when a java agent is active,
 thus agent *will not start* on those versions.
 Similarly, Java 7 versions before update 60 are not supported as they are buggy in regard to invokedynamic.