Read timeout error while using Remote REST API to start process in BPMS 6

Issue

When Kession.startProcess(...) is fired from java client below exception is thrown

 org.kie.remote.client.api.exception.RemoteCommunicationException: Unable to send HTTP POST request
    at org.kie.services.client.api.command.AbstractRemoteCommandObject.executeRestCommand(AbstractRemoteCommandObject.java:366)
    at org.kie.services.client.api.command.AbstractRemoteCommandObject.executeCommand(AbstractRemoteCommandObject.java:159)
    at org.kie.services.client.api.command.KieSessionClientCommandObject.startProcess(KieSessionClientCommandObject.java:276)
         . . .
Caused by: org.kie.remote.common.rest.KieRemoteHttpRequestException: Error occurred when trying to retrieve response code
    at org.kie.remote.common.rest.KieRemoteHttpRequest.responseCode(KieRemoteHttpRequest.java:1320)
    at org.kie.remote.common.rest.KieRemoteHttpRequest.post(KieRemoteHttpRequest.java:719)
    at org.kie.services.client.api.command.AbstractRemoteCommandObject.executeRestCommand(AbstractRemoteCommandObject.java:362)
    ... 
Caused by: java.net.SocketTimeoutException: Read timed out
    at java.net.SocketInputStream.socketRead0(Native Method)