XMLWordPrintableJSON

    Details

      Description

      2019-01-24 14:43:52,059 ERROR akka.remote.Remoting                                          - class [B cannot be cast to class [C ([B and [C are in module java.base of loader 'bootstrap')
      java.lang.ClassCastException: class [B cannot be cast to class [C ([B and [C are in module java.base of loader 'bootstrap')
              at akka.remote.artery.FastHash$.ofString(LruBoundedCache.scala:18)
              at akka.remote.serialization.ActorRefResolveCache.hash(ActorRefResolveCache.scala:61)
              at akka.remote.serialization.ActorRefResolveCache.hash(ActorRefResolveCache.scala:55)
              at akka.remote.artery.LruBoundedCache.getOrCompute(LruBoundedCache.scala:110)
              at akka.remote.RemoteActorRefProvider.resolveActorRef(RemoteActorRefProvider.scala:403)
              at akka.actor.SerializedActorRef.readResolve(ActorRef.scala:433)
              at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
              at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
              at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
              at java.base/java.lang.reflect.Method.invoke(Method.java:566)
              at java.base/java.io.ObjectStreamClass.invokeReadResolve(ObjectStreamClass.java:1250)
              at java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2096)
              at java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1594)Running a jobmanager with java 11 fail with the following call stack:
      

      Flink master is using akka 2.4.20.

      After some investigation, the error in akka comes from the following line:

      def ofString(s: String): Int = {
      val chars = Unsafe.instance.getObject(s, EnvelopeBuffer.StringValueFieldOffset).asInstanceOf[Array[Char]]
      

      from java 9 it is now an array of byte. The akka code in the newer version is:

          public static int fastHash(String str) {
                ...
              if (isJavaVersion9Plus) {
                  final byte[] chars = (byte[]) instance.getObject(str, stringValueFieldOffset);
                  ...
              } else {
                  final char[] chars = (char[]) instance.getObject(str, stringValueFieldOffset);
       

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                chesnay Chesnay Schepler
                Reporter:
                mbonneviot Matthieu Bonneviot
              • Votes:
                0 Vote for this issue
                Watchers:
                3 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved:

                  Time Tracking

                  Estimated:
                  Original Estimate - Not Specified
                  Not Specified
                  Remaining:
                  Remaining Estimate - 0h
                  0h
                  Logged:
                  Time Spent - 20m
                  20m