Below you find an excerpt of Java VisualVM. It shows the thread processing the call during that blocking period. At the bottom you see the entry call to getPort. It seems that the call to JAXWSClientMetaDataBuilder.rebuildEndpointMetaData might take so long. The duration of that call might possibly depend on the complexity of the web service interface. Just my assumption.
"http-0.0.0.0-8080-1" daemon prio=6 tid=0x462e3400 nid=0x8cc runnable [0x4bfec000..0x4bfefd94]
java.lang.Thread.State: RUNNABLE
at java.lang.Class.isAssignableFrom(Native Method)
at org.jboss.wsf.common.JavaUtils.isAssignableFrom(JavaUtils.java:402)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.isAttachmentDataType(ReflectiveAttachmentRefScanner.java:253)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:86)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.extensions.xop.jaxws.ReflectiveAttachmentRefScanner.scanBean(ReflectiveAttachmentRefScanner.java:119)
at org.jboss.ws.metadata.umdm.ParameterMetaData.initializeAttachmentParameter(ParameterMetaData.java:497)
at org.jboss.ws.metadata.umdm.ParameterMetaData.eagerInitialize(ParameterMetaData.java:482)
at org.jboss.ws.metadata.umdm.OperationMetaData.eagerInitialize(OperationMetaData.java:466)
at org.jboss.ws.metadata.umdm.EndpointMetaData.eagerInitializeOperations(EndpointMetaData.java:559)
at org.jboss.ws.metadata.umdm.EndpointMetaData.initializeInternal(EndpointMetaData.java:543)
at org.jboss.ws.metadata.umdm.EndpointMetaData.eagerInitialize(EndpointMetaData.java:533)
at org.jboss.ws.metadata.builder.jaxws.JAXWSClientMetaDataBuilder.rebuildEndpointMetaData(JAXWSClientMetaDataBuilder.java:312)
at org.jboss.ws.core.jaxws.spi.ServiceDelegateImpl.getPortInternal(ServiceDelegateImpl.java:269)
at org.jboss.ws.core.jaxws.spi.ServiceDelegateImpl.getPort(ServiceDelegateImpl.java:240)
at javax.xml.ws.Service.getPort(Service.java:169)