java.rmi.UnmarshalException: error unmarshalling return; nested exception is:
    java.io.InvalidClassException: testserver.cluster.Status; incompatible types for field committed
    at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:173)
    at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:178)
    at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:132)
    at $Proxy14.getStatistics(Unknown Source)
    at testserver.rm.RM$Check.run(RM.java:1593)
Caused by: java.io.InvalidClassException: testserver.cluster.Status; incompatible types for field committed
    at java.io.ObjectStreamClass.matchFields(ObjectStreamClass.java:2210)
    at java.io.ObjectStreamClass.getReflector(ObjectStreamClass.java:2105)
    at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:602)
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1582)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1495)
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1582)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1495)
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1582)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1495)
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1582)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1495)
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1582)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1495)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1731)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
    at sun.rmi.server.UnicastRef.unmarshalValue(UnicastRef.java:306)
    at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:155)
    ... 4 more

if ((f.isPrimitive() || lf.isPrimitive())
        && f.getTypeCode() != lf.getTypeCode()) {
    throw new InvalidClassException(localDesc.name,
        "incompatible types for field "
                    + f.getName());
}