Why not have the load balancer load the home page, authenticate, and check the response code. If 200, then status is ok, if 500 series, then fault the node. I assume that when the error below occurs in the mid-tier logs, you are getting 500 responses in the browser.
The response code is really easy to pick out of the http headers and it is something that every web server will return will every http request. On Wed, Dec 8, 2010 at 11:15 AM, LJ LongWing <[email protected]> wrote: > ** > > I have recently been having issues where the Tomcat is ‘functional’ from a > Tomcat perspective, but you can’t log onto the app server, getting the > following error. What I’m trying to do is write a jsp that will see if a > URL ‘returns a value’…specifically I’m planning on using a login URL to get > to the home page with ID and PW pre-configured on the URL…..if that URL > loads fine, I need to have the JSP page return a 200, if not, something > else. This is for a load balancer that can’t currently tell if your server > is online or not. > > > > HTTP Status 500 - > > > > type Exception report > > > > message > > > > description The server encountered an internal error () that prevented it > from fulfilling this request. > > > > exception > > > > java.lang.ArrayIndexOutOfBoundsException > > java.lang.System.arraycopy(Native Method) > > > com.bmc.arsys.arrpc.rpcext.ArXdrTcpEncodingStream.getEncodedBuffer(Unknown > Source) > > com.bmc.arsys.arrpc.rpcext.ArXdrTcpEncodingStream.endEncoding(Unknown > Source) > > com.bmc.thirdparty.org.acplt.oncrpc.OncRpcTcpClient.call(Unknown > Source) > > com.bmc.arsys.api.arxdrenc.b.call(Unknown Source) > > com.bmc.arsys.api.session.c.a(Unknown Source) > > com.bmc.arsys.api.ProxyJRpcBase.a(Unknown Source) > > com.bmc.arsys.api.ProxyJRpcBase.arCall(Unknown Source) > > com.bmc.arsys.api.ProxyJRpc.ARVerifyUser(Unknown Source) > > com.bmc.arsys.api.ARServerUser.verifyUser(Unknown Source) > > com.bmc.arsys.api.ARServerUser.login(Unknown Source) > > com.remedy.arsys.session.LoginServlet.authenticate(Unknown Source) > > com.remedy.arsys.session.LoginServlet.doLogin(Unknown Source) > > com.remedy.arsys.session.LoginServlet.doThePost(Unknown Source) > > com.remedy.arsys.session.LoginServlet.doRequest(Unknown Source) > > com.remedy.arsys.stubs.GoatHttpServlet.postInternal(Unknown Source) > > com.remedy.arsys.stubs.GoatHttpServlet.doPost(Unknown Source) > > javax.servlet.http.HttpServlet.service(HttpServlet.java:647) > > javax.servlet.http.HttpServlet.service(HttpServlet.java:729) > > note The full stack trace of the root cause is available in the Apache > Tomcat/5.5.28 logs. > > > > > > *From:* Action Request System discussion list(ARSList) [mailto: > [email protected]] *On Behalf Of *Axton > *Sent:* Wednesday, December 08, 2010 10:02 AM > *To:* [email protected] > *Subject:* Re: JSP to monitor functionality > > > > ** Hit the mid-tier configuration page; if it loads, then the > container/jvm are working. If you want to go beyond that, create a jsp that > performs the desired checks and returns the output in a format that you can > parse, like xml. > > On Wed, Dec 8, 2010 at 10:45 AM, LJ LongWing <[email protected]> > wrote: > > ** > > I have an urgent need to be able see if our server is online through JSP. > Suggestions? > > _attend WWRUG11 www.wwrug.com ARSlist: "Where the Answers Are"_ > > > _attend WWRUG11 www.wwrug.com ARSlist: "Where the Answers Are"_ > _attend WWRUG11 www.wwrug.com ARSlist: "Where the Answers Are"_ > _______________________________________________________________________________ UNSUBSCRIBE or access ARSlist Archives at www.arslist.org attend wwrug11 www.wwrug.com ARSList: "Where the Answers Are"
