Task map replication fails in a Data Center environment with a ClassNotFoundException

2018-01-03 21:05:04,793 ehcache-replicator-15 ERROR ServiceRunner [c.a.j.c.cache.ehcache.BlockingParallelCacheReplicator] Exception on replication of put. RemoteException occurred in server thread; nested exception is: 
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
java.lang.ClassNotFoundException: com.awnaba.projectconfigurator.operationsapi.impl.ConfigExportResultImpl (no security manager: RMI class loader disabled). Cache: com.atlassian.jira.task.TaskManagerImpl.taskMap Peer: com.atlassian.jira.task.TaskManagerImpl.taskMap
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
java.lang.ClassNotFoundException: com.awnaba.projectconfigurator.operationsapi.impl.ConfigExportResultImpl (no security manager: RMI class loader disabled)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:389)
at sun.rmi.transport.Transport$1.run(Transport.java:200)
at sun.rmi.transport.Transport$1.run(Transport.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:283)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:260)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:161)
at net.sf.ehcache.distribution.RMICachePeer_Stub.put(Unknown Source)
at com.atlassian.jira.cluster.cache.ehcache.BlockingParallelCacheReplicator.lambda$replicatePutNotification$0(BlockingParallelCacheReplicator.java:153)
at com.atlassian.jira.cluster.cache.ehcache.BlockingParallelCacheReplicator.lambda$null$3(BlockingParallelCacheReplicator.java:203)
at com.atlassian.jira.cluster.cache.ehcache.ClassLoaderSwitchingRunnable.run(ClassLoaderSwitchingRunnable.java:18)
at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1626)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
java.lang.ClassNotFoundException: com.awnaba.projectconfigurator.operationsapi.impl.ConfigExportResultImpl (no security manager: RMI class loader disabled)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:348)
at sun.rmi.transport.Transport$1.run(Transport.java:200)
at sun.rmi.transport.Transport$1.run(Transport.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)
... 3 more
Caused by: java.lang.ClassNotFoundException: com.awnaba.projectconfigurator.operationsapi.impl.ConfigExportResultImpl (no security manager: RMI class loader disabled)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:396)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:186)
at java.rmi.server.RMIClassLoader$2.loadClass(RMIClassLoader.java:637)
at java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:264)
at sun.rmi.server.MarshalInputStream.resolveClass(MarshalInputStream.java:219)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1746)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2037)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2206)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2282)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:558)
at net.sf.ehcache.Element.readObject(Element.java:884)
... 2 filtered
at java.lang.reflect.Method.invoke(Method.java:498)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1158)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2173)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2064)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1568)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:428)
at sun.rmi.server.UnicastRef.unmarshalValue(UnicastRef.java:322)
at sun.rmi.server.UnicastServerRef.unmarshalParametersUnchecked(UnicastServerRef.java:628)
at sun.rmi.server.UnicastServerRef.unmarshalParameters(UnicastServerRef.java:616)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:339)
... 12 more