在java中集成了BO Crystal Report，
ISessionMgr sessionMgr = CrystalEnterprise.getSessionMgr();
//登录验证
IEnterpriseSession enterpriseSession = sessionMgr.logon(userName,password,pageServer,auth);
在执行登录验证的时候发现报错了，
com.crystaldecisions.enterprise.ocaframework.OCAFrameworkException$CommunicationError: 尝试连接到服务器 192.168.100.90 时出现通信错误 (FWM 01009)
Caused by: com.crystaldecisions.thirdparty.org.omg.CORBA.COMM_FAILURE: gethostbyname() failed: java.net.UnknownHostException: SJYGSF01  minor code: 0x4f4f000e  completed: No
at com.crystaldecisions.thirdparty.com.ooc.OCI.IIOP.Connector_impl.connect(Connector_impl.java:104)
at com.crystaldecisions.thirdparty.com.ooc.OB.GIOPClient.createTransport(GIOPClient.java:233)
at com.crystaldecisions.thirdparty.com.ooc.OB.GIOPClientWorkersPool.next(GIOPClientWorkersPool.java:122)
at com.crystaldecisions.thirdparty.com.ooc.OB.GIOPClient.getWorker(GIOPClient.java:105)
at com.crystaldecisions.thirdparty.com.ooc.OB.GIOPClient.startDowncall(GIOPClient.java:409)
at com.crystaldecisions.thirdparty.com.ooc.OB.Downcall.preMarshalBase(Downcall.java:181)
at com.crystaldecisions.thirdparty.com.ooc.OB.Downcall.preMarshal(Downcall.java:298)
at com.crystaldecisions.thirdparty.com.ooc.OB.DowncallStub.preMarshal(DowncallStub.java:265)
at com.crystaldecisions.thirdparty.com.ooc.OB.DowncallStub.setupRequest(DowncallStub.java:545)
at com.crystaldecisions.thirdparty.com.ooc.CORBA.Delegate.request(Delegate.java:556)
at com.crystaldecisions.thirdparty.com.ooc.CORBA.Delegate.is_a(Delegate.java:373)
at com.crystaldecisions.thirdparty.org.omg.CORBA.portable.ObjectImpl._is_a(ObjectImpl.java:88)
at com.crystaldecisions.enterprise.ocaframework.idl.ImplServ.OSCAFactoryExHelper.narrow(OSCAFactoryExHelper.java:100)
at com.crystaldecisions.enterprise.ocaframework.ServiceMgr.getOSCAFactory(ServiceMgr.java:727)
at com.crystaldecisions.enterprise.ocaframework.ServiceMgr.getUnmanagedService(ServiceMgr.java:828)
at com.crystaldecisions.enterprise.ocaframework.RawAPSDirectory.find(RawAPSDirectory.java:151)
… 48 more
请大家这个是什么情况啊？