"faultString: java.net.ConnectException: Connection refused"

Hi ,

We are facing the below error , when we are trying to access service(Webservice deployed in separate machine with OAS10.1.2.3 ).

We are getting the below issue during only in business peak hours. We noticed CPU utilization (Machine where Webservice is deployed) is went up to 60%.

For work around we are restarting the OAS Services(where webservice is deployed).

We are using the following code snippet to connect to the service.

Code Snippet:
------------------
Service service = new Service();
        Call call = (Call) service.createCall();
        call.setTimeout(new Integer(300000));
        call.setTargetEndpointAddress(new URL(WEBSERVICE_URL));
        call.setOperationName(new QName(SERVICE_NAME, SERVICE_METHOD));
        call.addParameter(ELEMENT_NAME, XMLType.XSD_STRING, ParameterMode.IN);
        call.setReturnType(XMLType.XSD_STRING);
        String quoteResponseXml = (String) call.invoke(new Object[] { quoteRequestXml });

Error Message:
----------------------

AxisFault
 faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
 faultSubcode:
 faultString: java.net.ConnectException: Connection refused
 faultActor:
 faultNode:
 faultDetail:
      {http://xml.apache.org/axis/}stackTrace: java.net.ConnectException: Connection refused
      at java.net.PlainSocketImpl.socketConnect(Native Method)
      at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
      at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
      at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
      at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:367)
      at java.net.Socket.connect(Socket.java:524)
      at java.net.Socket.connect(Socket.java:474)
      at java.net.Socket.<init>(Socket.java:371)
      at java.net.Socket.<init>(Socket.java:184)
      at org.apache.axis.components.net.DefaultSocketFactory.create(DefaultSocketFactory.java:129)
      at org.apache.axis.transport.http.HTTPSender.getSocket(HTTPSender.java:157)
      at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:114)
      at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:71)
      at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:150)
      at org.apache.axis.SimpleChain.invoke(SimpleChain.java:120)
      at org.apache.axis.client.AxisClient.invoke(AxisClient.java:180)
      at org.apache.axis.client.Call.invokeEngine(Call.java:2526)
      at org.apache.axis.client.Call.invoke(Call.java:2515)
      at org.apache.axis.client.Call.invoke(Call.java:2210)
      at org.apache.axis.client.Call.invoke(Call.java:2133)
      at org.apache.axis.client.Call.invoke(Call.java:1656)
      at com.thirdpillar.oz.client.helper.QuoteCalculateHelper.calculateQuote(QuoteCalculateHelper.java:141)
      at com.thirdpillar.oz.client.helper.QuoteCalculateHelper.calculateQuote(QuoteCalculateHelper.java:82)
      at com.thirdpillar.oz.client.web.action.QuoteCalculationAction.process(QuoteCalculationAction.java:65)
      at com.thirdpillar.oz.client.web.action.BaseAction.execute(BaseAction.java:83)
      at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
      at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
      at com.thirdpillar.oz.client.web.OzRequestProcessor.process(OzRequestProcessor.java:189)
      at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
      at com.thirdpillar.oz.client.web.FrontController.process(FrontController.java:54)
      at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
      at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:734)
      at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:391)
      at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:908)
      at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:458)
      at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:313)
      at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:199)
      at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
      at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
      at java.lang.Thread.run(Thread.java:595)


java.net.ConnectException: Connection refused
      at org.apache.axis.AxisFault.makeFault(AxisFault.java:129)
      at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:131)
      at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:71)
      at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:150)
      at org.apache.axis.SimpleChain.invoke(SimpleChain.java:120)
      at org.apache.axis.client.AxisClient.invoke(AxisClient.java:180)
      at org.apache.axis.client.Call.invokeEngine(Call.java:2526)
      at org.apache.axis.client.Call.invoke(Call.java:2515)
      at org.apache.axis.client.Call.invoke(Call.java:2210)
      at org.apache.axis.client.Call.invoke(Call.java:2133)
      at org.apache.axis.client.Call.invoke(Call.java:1656)
      at com.thirdpillar.oz.client.helper.QuoteCalculateHelper.calculateQuote(QuoteCalculateHelper.java:141)
      at com.thirdpillar.oz.client.helper.QuoteCalculateHelper.calculateQuote(QuoteCalculateHelper.java:82)
      at com.thirdpillar.oz.client.web.action.QuoteCalculationAction.process(QuoteCalculationAction.java:65)
      at com.thirdpillar.oz.client.web.action.BaseAction.execute(BaseAction.java:83)
      at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
      at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
      at com.thirdpillar.oz.client.web.OzRequestProcessor.process(OzRequestProcessor.java:189)
      at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
      at com.thirdpillar.oz.client.web.FrontController.process(FrontController.java:54)
      at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
      at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:734)
      at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:391)
      at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:908)
      at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:458)
      at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:313)
      at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:199)
      at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
      at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
      at java.lang.Thread.run(Thread.java:595)
Caused by: java.net.ConnectException: Connection refused
      at java.net.PlainSocketImpl.socketConnect(Native Method)
      at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
      at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
      at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
      at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:367)
      at java.net.Socket.connect(Socket.java:524)
      at java.net.Socket.connect(Socket.java:474)
      at java.net.Socket.<init>(Socket.java:371)
      at java.net.Socket.<init>(Socket.java:184)
      at org.apache.axis.components.net.DefaultSocketFactory.create(DefaultSocketFactory.java:129)
      at org.apache.axis.transport.http.HTTPSender.getSocket(HTTPSender.java:157)
      at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:114)
      ... 30 more