Getting "org.apache.axis2.AxisFault: The input stream for an incoming message is null" for SOAP request

I am working with a apache axis 2 client (generated from Intellij IDEA plugins) to consume an external service. For a particular request if i increase my domain elements in different ways e.g employees from 100 to 101 or more OR keep employees 100 but increase managers from 55 to 56 or more i get the following :

org.apache.axis2.AxisFault: The input stream for an incoming message is null.

The web service server is a third party and i cannot verify whats happening at that end. It seems to be some web service size error to me but the service provider informed me that they dont have any limits on web service data.

Like to confirm can this error be avoided on client side for bigger size request ?
OR
is this some server side size issue which i assuming and can only be handled at server ? If Yes then how. Where do we set the web service request size limit.? Can we as a service provider publish it in the WSDL ?