connectToServer throwing NullPointerException

Hi Team,

I am using following dependencies
`
javax.websocket
javax.websocket-api
compile
1.0


org.glassfish.tyrus
tyrus-client
1.8.3


org.glassfish.tyrus
tyrus-container-jdk-client
1.8.3
`
Code:
`
final ClientManager client = ClientManager.createClient(JdkClientContainer.class.getName());
client.getProperties().put(ClientProperties.PROXY_URI, proxyURI);
client.connectToServer(this, super.getWssUri());`

I am getting this error when the connectToServer function gets called.:
Logs:
`
11:16:46,250 ERROR [stderr] ( tyrus-jdk-client-3) Exception in thread " tyrus-jdk-client-3" java.lang.NullPointerException
  | 11:16:46,250 ERROR [stderr] ( tyrus-jdk-client-3) at org.glassfish.tyrus.container.jdk.client.TransportFilter$4.completed(TransportFilter.java:281)
  | 11:16:46,250 ERROR [stderr] ( tyrus-jdk-client-3) at org.glassfish.tyrus.container.jdk.client.TransportFilter$4.completed(TransportFilter.java:272)
  | 11:16:46,250 ERROR [stderr] ( tyrus-jdk-client-3) at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
  | 11:16:46,250 ERROR [stderr] ( tyrus-jdk-client-3) at sun.nio.ch.Invoker$2.run(Invoker.java:218)
  | 11:16:46,250 ERROR [stderr] ( tyrus-jdk-client-3) at sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112)
  | 11:16:46,250 ERROR [stderr] ( tyrus-jdk-client-3) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
  | 11:16:46,250 ERROR [stderr] ( tyrus-jdk-client-3) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
  | 11:16:46,250 ERROR [stderr] ( tyrus-jdk-client-3) at java.lang.Thread.run(Thread.java:748)`

Pavel can you help me with this.
I am trying to make connection through a proxy host.