JDK16 compatibility issues

Are you looking for help?

Checking if it’s possible to migrate development on JDK16

Lagom Version (1.2.x / 1.3.x / etc)

1.6.5

API (Scala / Java / Neither / Both)

Java/maven

Operating System (Ubuntu 15.10 / MacOS 10.10 / Windows 10)

MacOS Big Sur

JDK (Oracle 1.8.0_112, OpenJDK 1.8.x, Azul Zing)

16.0.1.hs-adpt

Library Dependencies

Expected Behavior

Please describe the expected behavior of the issue, starting from the first action.

1. run mvn clean install

Actual Behavior

Project passes but stops when integration suite kicks off.

• Issue when starting Kafka

java.lang.reflect.InaccessibleObjectException: Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @654b5005
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
	at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199)
	at java.base/java.lang.reflect.Method.setAccessible(Method.java:193)
	at javassist.util.proxy.SecurityActions.setAccessible(SecurityActions.java:159)
	at javassist.util.proxy.DefineClassHelper$JavaOther.defineClass(DefineClassHelper.java:213)
	at javassist.util.proxy.DefineClassHelper$Java11.defineClass(DefineClassHelper.java:52)
	at javassist.util.proxy.DefineClassHelper.toClass(DefineClassHelper.java:263)
	at javassist.ClassPool.toClass(ClassPool.java:1232)
	at javassist.ClassPool.toClass(ClassPool.java:1090)
	at javassist.ClassPool.toClass(ClassPool.java:1048)
	at javassist.CtClass.toClass(CtClass.java:1290)
	at org.apache.curator.test.ByteCodeRewrite.fixMethods(ByteCodeRewrite.java:95)
	at org.apache.curator.test.ByteCodeRewrite.<clinit>(ByteCodeRewrite.java:50)
	at org.apache.curator.test.TestingServer.<clinit>(TestingServer.java:33)
	at com.lightbend.lagom.internal.kafka.KafkaLocalServer$ZooKeeperLocalServer.start(KafkaLocalServer.scala:177)
	at com.lightbend.lagom.internal.kafka.KafkaLocalServer.start(KafkaLocalServer.scala:36)
	at com.lightbend.lagom.internal.kafka.KafkaLauncher$.main(KafkaLauncher.scala:49)
	at com.lightbend.lagom.internal.kafka.KafkaLauncher.main(KafkaLauncher.scala)

• Issue when starting Cassandra

Exception (java.lang.AssertionError) encountered during startup: java.lang.reflect.InaccessibleObjectException: Unable to make field private int java.io.FileDescriptor.fd accessible: module java.base does not "opens java.io" to unnamed module @654b5005
java.lang.AssertionError: java.lang.reflect.InaccessibleObjectException: Unable to make field private int java.io.FileDescriptor.fd accessible: module java.base does not "opens java.io" to unnamed module @654b5005
	at org.apache.cassandra.utils.FBUtilities.getProtectedField(FBUtilities.java:608)
	at org.apache.cassandra.utils.NativeLibrary.<clinit>(NativeLibrary.java:80)
	at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:196)
	at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:602)
	at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:691)
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private int java.io.FileDescriptor.fd accessible: module java.base does not "opens java.io" to unnamed module @654b5005
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
	at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:177)
	at java.base/java.lang.reflect.Field.setAccessible(Field.java:171)
	at org.apache.cassandra.utils.FBUtilities.getProtectedField(FBUtilities.java:603)
	... 4 more
07/26 13:41:54 ERROR[main] o.a.c.s.CassandraDaemon - Exception encountered during startup
java.lang.AssertionError: java.lang.reflect.InaccessibleObjectException: Unable to make field private int java.io.FileDescriptor.fd accessible: module java.base does not "opens java.io" to unnamed module @654b5005
	at org.apache.cassandra.utils.FBUtilities.getProtectedField(FBUtilities.java:608) ~[cassandra-bundle.jar:1.0.0-M0+46-b373604e]
	at org.apache.cassandra.utils.NativeLibrary.<clinit>(NativeLibrary.java:80) ~[cassandra-bundle.jar:1.0.0-M0+46-b373604e]
	at org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:196) ~[cassandra-bundle.jar:1.0.0-M0+46-b373604e]
	at org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:602) ~[cassandra-bundle.jar:1.0.0-M0+46-b373604e]
	at org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:691) ~[cassandra-bundle.jar:1.0.0-M0+46-b373604e]
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private int java.io.FileDescriptor.fd accessible: module java.base does not "opens java.io" to unnamed module @654b5005
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357) ~[na:na]
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297) ~[na:na]
	at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:177) ~[na:na]
	at java.base/java.lang.reflect.Field.setAccessible(Field.java:171) ~[na:na]
	at org.apache.cassandra.utils.FBUtilities.getProtectedField(FBUtilities.java:603) ~[cassandra-bundle.jar:1.0.0-M0+46-b373604e]
	... 4 common frames omitted

• Issue starting Service Locator

[ERROR] Failed to execute goal com.lightbend.lagom:lagom-maven-plugin:1.6.5:startAll (default) on project integration-tests: Execution lagom-internal-request of goal com.lightbend.lagom:lagom-maven-plugin:1.6.5:startServiceLocator failed: Failed to start embedded Service Locator or Service Gateway. Hint: Are ports 9008 or 9000 already in use?: java.lang.IllegalStateException: Unable to load cache item: ExceptionInInitializerError: java.lang.reflect.InaccessibleObjectException-->Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @5d604f00 -> [Help 1]

[Randerspl]

I know that cassandra just “recently” supports java 11 in new 4.x version (currently 4.0-RC2). I think lagom uses in development mode cassandra 3.x which is not working on jdk 11 and should not work on 16 either

[gabizou]

For what it’s worth, I’ve found that it’s the Cassandra driver using good old reflection that newer Java versions no longer support unless you explicitly enable via —illegal-access=permit as a jvm flag in maven. I’ve had this work in development, but not tested in a full production environment (yet).