关于Restlet,在一个Rest服务中请求另一个Rest服务，出现了No CallContext given until now 异常。

Exception or error caught by status service

java.lang.IllegalStateException: No CallContext given until now
at org.restlet.ext.jaxrs.internal.core.ThreadLocalizedContext.get(ThreadLocalizedContext.java:123)
at org.restlet.ext.jaxrs.JaxRsRestlet.handleResult(JaxRsRestlet.java:800)
at org.restlet.ext.jaxrs.JaxRsRestlet.handle(JaxRsRestlet.java:746)
at org.restlet.routing.Filter.doHandle(Filter.java:150)
at org.restlet.routing.Filter.handle(Filter.java:197)
at org.restlet.routing.Filter.doHandle(Filter.java:150)
at org.restlet.routing.Filter.handle(Filter.java:197)
at org.restlet.routing.Filter.doHandle(Filter.java:150)

callcontext没找到