JDK 17 Official support (#2327)

* remove disabled tests on JDK 15,16

* update documentation

* remove jdk 12,13,14 from jdk tests

* disable jedis1 test known to fail on jdk15

* avoid using level 3 headers

* disable openjdk 18 test for now

* fix pipeline typo

* simplify jdk17 compat change to minimal

Jenkinsfile

@@ -335,7 +335,8 @@ 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'
+            // 'openjdk18'  disabled for now see https://github.com/elastic/apm-agent-java/issues/2328
+            values 'openjdk17'
 
           }
         }

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";

apm-agent-plugins/apm-redis-plugin/apm-jedis-plugin/src/test/java/co/elastic/apm/agent/jedis/Jedis1InstrumentationIT.java

@@ -22,6 +22,8 @@
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.DisabledOnJre;
+import org.junit.jupiter.api.condition.JRE;
 import redis.clients.jedis.Jedis;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -48,6 +50,7 @@ void tearDownJedis() {
     }
 
     @Test
+    @DisabledOnJre(JRE.JAVA_15) // https://github.com/elastic/apm-agent-java/issues/1944
     void testJedis() {
         jedis.set("foo", "bar");
         assertThat(jedis.get("foo".getBytes())).isEqualTo("bar".getBytes());

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+, 9, 10, 11, 17
 |`--module-path` has not been tested yet
 
-|Open JDK
-|7u60+, 8u40+, 9, 10, 11
+|OpenJDK
+|7u60+, 8u40+, 9, 10, 11, 17
 |`--module-path` has not been tested yet
 
 |IBM J9 VM
@@ -64,7 +64,9 @@ the agent does not capture transactions.
 |
 |===
 
-NOTE: Early Java 8 versions before update 40 are *not supported* because they have
+**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.