javax.xml.ws.soap.SOAPFaultException: Could not get a resource from the pool

I am getting the following error when I a trying to use a generated SOAP client. I couldn't find anything online about this error. Please help me out.

javax.xml.ws.soap.SOAPFaultException: Could not get a resource from the pool com.sun.xml.internal.ws.fault.SOAP11Fault.getProtocolException(SOAP11Fault.java:178) com.sun.xml.internal.ws.fault.SOAPFaultBuilder.createException(SOAPFaultBuilder.java:111) com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:108) com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(SyncMethodHandler.java:78) com.sun.xml.internal.ws.client.sei.SEIStub.invoke(SEIStub.java:129)