OTP issues

[Robinlovelace]

Some OTP issues mentioned in #6 and #12

Routing isn't working for me:

Seeing errors like this:

10:56:43.298 INFO (GrizzlyServer.java:148) Grizzly server running.
10:58:50.975 ERROR (PlannerResource.java:97) System error
java.lang.NullPointerException: zone
        at java.base/java.util.Objects.requireNonNull(Objects.java:235)
        at java.base/java.time.ZonedDateTime.ofInstant(ZonedDateTime.java:410)
        at org.opentripplanner.util.time.DateUtils.toZonedDateTime(DateUtils.java:59)
        at org.opentripplanner.routing.api.request.RouteRequest.setDateTime(RouteRequest.java:123)
        at org.opentripplanner.api.common.RoutingResource.buildRequest(RoutingResource.java:673)
        at org.opentripplanner.api.resource.PlannerResource.plan(PlannerResource.java:68)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:569)
        at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:52)
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:124)
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:167)
        at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:219)
        at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:79)
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:475)
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:397)
        at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:81)
        at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:255)
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
        at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
        at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:234)
        at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:680)
        at org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpContainer.service(GrizzlyHttpContainer.java:356)
        at org.glassfish.grizzly.http.server.HttpHandler$1.run(HttpHandler.java:200)
        at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:569)
        at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:549)
        at java.base/java.lang.Thread.run(Thread.java:840)

Not sure the cause, could be a Java version issue as @juanfonsecaLS1 suggests, posting here in case of use/interest, would of course love to get it working but not vital.