DoGet() method is being called every 3inutes repetitively in servlet

Question

HI,
There are 2 managed servers in one unix box.
i have one war application deployed in cluster level. This war application will search the logs and will give particular content as a result.
The Jsp page will send the request and it is able to get the correct results if the operation completes within 3 minutes. if there are so many logs, it is giving unreliable results as war application is sending the request again and again in the interval of 3 mins.
Request parameters are getting by servlet, and this servlet will create the unix shellscript in background and it will execute in a box.
0-3 mins 1st .sh creating and executing..
3-6 mins 2nd .sh creats and starts the execution, once the 1 one is completed...
its becomes infinite loop...
after some time Browser is going to diagnostic error state..
i did debugging there i can see doGet method of servlet is being called for every 3 minutes..
to avoid this i tried to give some parameters in weblogic.xml file...but its not working..
please fine below weblogic.xml file
====================================
<?xml version='1.0' encoding='UTF-8'?>
<weblogic-web-app xmlns="http://xmlns.oracle.com/weblogic/weblogic-web-app" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.oracle.com/weblogic/weblogic-web-app http://xmlns.oracle.com/weblogic/weblogic-web-app/1.2/weblogic-web-app.xsd">
<session-descriptor>
</session-descriptor>
<jsp-descriptor>
<page-check-seconds>-1</page-check-seconds>
<debug>true</debug>
</jsp-descriptor>
<container-descriptor>
<resource-reload-check-secs>-1</resource-reload-check-secs>
<servlet-reload-check-secs>-1</servlet-reload-check-secs>
<prefer-web-inf-classes>true</prefer-web-inf-classes>
</container-descriptor>
<logging>
<log-filename>/wls_domains/b2borap2/application_MT/logs/messagetracker.log</log-filename>
</logging>
</weblogic-web-app>
=======================================================
and web.xml file is
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:javaee="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<listener>
<listener-class>
com.tm.messagetracker.listeners.MTrackerSession
</listener-class>
</listener>
<servlet>
<servlet-name>Controller</servlet-name>
<servlet-class>com.tm.messagetracker.Controller</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Controller</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>30</session-timeout>
</session-config>
<mime-mapping>
<extension>txt</extension>
<mime-type>text/plain</mime-type>
</mime-mapping>
<mime-mapping>
<extension>html</extension>
<mime-type>text/html</mime-type>
</mime-mapping>
<mime-mapping>
<extension>htm</extension>
<mime-type>text/html</mime-type>
</mime-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>
=========================================
please find the servlet code..
public class Controller extends HttpServlet
public void init()
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException
     System.out.println("Iam at doGet");
res.setContentType("text/html");
HttpSession session = req.getSession (false);
if (session==null) {
     // We Send a Redirect
     res.sendRedirect("./../pages/login.jsp");
//HttpSession session = req.getSession(true);
boolean loginTravelled = new Boolean((String)session.getAttribute("loginTravelled")).booleanValue();
UserVerification uv = new UserVerification();
MTUtils mTUtils = new MTUtils();
Properties systemProps = SerializeProperties.doLoad();
int noOFrecordsPerPage = 10;
if (loginTravelled)
     System.out.println("loginTravelled value :"+loginTravelled);
String pageId = req.getParameter("pageId");
String actionId = req.getParameter("actionId");
if (actionId.equals("logout"))
session.removeAttribute("CompleteSearchRecords");
session.removeAttribute("DisplaySearchRecords");
session.invalidate();
System.gc();
res.sendRedirect("./../pages/login.jsp");
else if (pageId.equals("faq"))
if (actionId.equals("homepage"))
System.gc();
res.sendRedirect("./../pages/login.jsp");
else if (actionId.equals("download"))
String fileName = req.getParameter("fileName");
String originalFileName = req.getParameter("originalFileName");
doDownload(req, res, fileName, originalFileName);
else if (pageId.equals("login"))
if (actionId.equals("downloads"))
List downloadListRecords = null;
try
downloadListRecords = DownloadableRecords.getDownloadableRecords(new File(systemProps.getProperty("faq")));
catch (Exception e)
e.printStackTrace();
session.setAttribute("DownloadListRecords", downloadListRecords);
res.sendRedirect("./../pages/downloads.jsp");
else if (actionId.equals("userlogin"))
String userId = req.getParameter("uname").trim();
String password = req.getParameter("passwd").trim();
if ((userId != null) && (userId.length() > 0) && (password != null) && (password.length() > 0))
if ((userId.equals("superadmin")) && (password.equals("superadmin")))
res.sendRedirect("./../pages/admin.jsp");
String userAuthMsg = UserVerification.verifyUser(userId, password);
if (userAuthMsg.equals("adminuser"))
res.sendRedirect("./../pages/admin.jsp");
else if (userAuthMsg.equals("guestuser"))
res.sendRedirect("./../pages/search.jsp");
else if (userAuthMsg.equals("wrongpassword"))
res.sendRedirect("./../pages/login.jsp?userAuthDispMsg=Sorry wrong password");
else if (userAuthMsg.equals("unauthorizeduser"))
res.sendRedirect("./../pages/login.jsp?userAuthDispMsg=User is not Authorized ");
else if ((userAuthMsg.equals("adminpropsNotFound")) || (userAuthMsg.equals("guestpropsNotFound")))
res.sendRedirect("./../pages/error.jsp?userAuthDispMsg=user configurations not found , Please contact admin");
else
res.sendRedirect("./../pages/login.jsp?userAuthDispMsg=UserName or password cannot be null");
else if (pageId.equals("adminPage"))
if (actionId.equals("adduser"))
CommonProperties adminProps = MTrackerProperties.getAdminProps();
CommonProperties guestProps = MTrackerProperties.getGuestProps();
String userId = req.getParameter("adduname").trim();
String password = req.getParameter("passwd").trim();
String userAuthMsg = uv.verifyUser(userId);
if (userAuthMsg.equals("adminuser"))
res.sendRedirect("./../pages/admin.jsp?userAuthDispMsg=Admin user with name exists");
else if (userAuthMsg.equals("guestuser"))
res.sendRedirect("./../pages/admin.jsp?userAuthDispMsg=Guest user with name exists");
else
String userType = req.getParameter("usertype").trim();
if (userType.equals("admin"))
adminProps.addProperty(userId, password);
res.sendRedirect("./../pages/admin.jsp?userAuthDispMsg=User " + userId + " added successfully");
else
guestProps.addProperty(userId, password);
res.sendRedirect("./../pages/admin.jsp?userAuthDispMsg=User " + userId + " added successfully");
else if (actionId.equals("deleteuser"))
CommonProperties adminProps = MTrackerProperties.getAdminProps();
CommonProperties guestProps = MTrackerProperties.getGuestProps();
String userId = req.getParameter("deluname").trim();
String userAuthMsg = uv.verifyUser(userId);
if (userAuthMsg.equals("adminuser"))
adminProps.deleteProperty(userId);
res.sendRedirect("./../pages/admin.jsp?userAuthDispMsg=Admin user " + userId + " deleted");
else if (userAuthMsg.equals("guestuser"))
guestProps.deleteProperty(userId);
res.sendRedirect("./../pages/admin.jsp?userAuthDispMsg=Guest user " + userId + " deleted");
else
res.sendRedirect("./../pages/admin.jsp?userAuthDispMsg=User " + userId + " does not exists ");
else if (actionId.equals("updatescript"))
String perlScriptLoc = req.getParameter("perlloc").trim();
SerializeProperties.doSave(perlScriptLoc);
try
Thread.sleep(2500L);
catch (InterruptedException e) {
e.printStackTrace();
res.sendRedirect("./../pages/admin.jsp?userAuthDispMsg=Perl script location updated with -> " + perlScriptLoc);
else if (actionId.equals("updatepropertyfile"))
String propfileLoc = req.getParameter("proploc").trim();
SerializeProperties.doSave(propfileLoc);
try
Thread.sleep(2500L);
catch (InterruptedException e) {
e.printStackTrace();
res.sendRedirect("./../pages/admin.jsp?userAuthDispMsg=Property file location updated with -> " + propfileLoc);
else if (actionId.equals("searchLink"))
res.sendRedirect("./../pages/search.jsp");
if (actionId.equals("cleanup"))
String resultsDir = systemProps.getProperty("results");
mTUtils.deleteFiles(new File(resultsDir), 24);
res.sendRedirect("./../pages/admin.jsp?userAuthDispMsg=Cleanup Done !!!");
else if (pageId.equals("searchPage"))
     System.out.println("Start searching process Here");
     if (actionId.equals("search"))
     System.out.println("Started searching process");
String tboxValue = req.getParameter("tbox");
String tareaValue = req.getParameter("tarea");
String SearchString = "";
String auditEnable = req.getParameter("audit");
String errorEnable = req.getParameter("error");
String debugEnable = req.getParameter("debug");
String srchStartDate = req.getParameter("srchstartDate");
String srchEndDate = req.getParameter("srchendDate");
String srchInZipFile = "";
if (req.getParameter("srchInZipFile") != null) {
srchInZipFile = req.getParameter("srchInZipFile");
String mode = req.getParameter("inputmode");
try
if (req.getParameter("recordsPerPage") != null)
noOFrecordsPerPage = new Integer(req.getParameter("recordsPerPage")).intValue();
catch (Exception e)
res.sendRedirect("./../pages/error.jsp?userAuthDispMsg=recordsPerPage should be a number");
if (mode.equals("single"))
SearchString = tboxValue;
else
SearchString = tareaValue;
String inputDir = systemProps.getProperty("inputs");
String resultsDir = systemProps.getProperty("results");
String inputFileName = new Integer(mTUtils.getRandom()).toString();
File inputParams = new File(inputDir + "/" + inputFileName + ".properties");
File inputTxt = new File(inputDir + "/" + inputFileName + ".txt");
synchronized (inputParams) {
     System.out.println("inputParams"+inputParams);
synchronized (inputTxt)
     System.out.println("inputtxt"+inputTxt);
boolean saved = false;
CommonProperties singleSerProps = new CommonProperties(inputParams);
Properties searchProps = new Properties();
searchProps.setProperty("search_from_date", srchStartDate);
searchProps.setProperty("search_to_date", srchEndDate);
searchProps.setProperty("force_zip_search", srchInZipFile);
if ((SearchProperties.saveSingeSearchProps(singleSerProps, searchProps)) && (SearchProperties.saveSearchFile(inputTxt, SearchString)))
if (mTUtils.genarateScript(auditEnable, debugEnable, errorEnable, srchInZipFile, inputFileName))
if (mTUtils.runScript("sh", inputFileName))
List tRecords = null;
TrackingLogReader treader = new TrackingLogReader();
try
tRecords = treader.getRecords(new File(resultsDir), inputFileName);
catch (Exception e)
e.printStackTrace();
if (tRecords == null)
tRecords = new ArrayList();
tRecords.add("No Records Found");
String backEnb = "";
String nextEnb = "";
int fromRec = 0;
int toRec = 0;
if (tRecords.size() > noOFrecordsPerPage)
toRec = noOFrecordsPerPage;
backEnb = "false";
nextEnb = "true";
else
toRec = tRecords.size();
backEnb = "false";
nextEnb = "false";
List subList = tRecords.subList(fromRec, toRec);
session.setAttribute("CompleteSearchRecords", tRecords);
session.setAttribute("DisplaySearchRecords", subList);
session.setAttribute("fromRec", new Integer(fromRec));
session.setAttribute("toRec", new Integer(toRec));
session.setAttribute("nextEnb", nextEnb);
session.setAttribute("backEnb", backEnb);
session.setAttribute("recsPerPage", new Integer(noOFrecordsPerPage));
res.sendRedirect("./../pages/SearchResults.jsp");
else {
res.sendRedirect("./../pages/error.jsp?userAuthDispMsg=Problem in calling PERL system , Please contact admin");
else
res.sendRedirect("./../pages/error.jsp?userAuthDispMsg=Script not generated , Please contact admin");
else
res.sendRedirect("./../pages/error.jsp?userAuthDispMsg=Search input directory not found, Please contact admin ");
//inputParams.delete();
//inputTxt.delete();
else if (pageId.equals("searchresults"))
noOFrecordsPerPage = ((Integer)session.getAttribute("recsPerPage")).intValue();
if (actionId.equals("newSearch"))
session.removeAttribute("CompleteSearchRecords");
session.removeAttribute("DisplaySearchRecords");
session.removeAttribute("fromRec");
session.removeAttribute("toRec");
session.removeAttribute("recsPerPage");
System.gc();
res.sendRedirect("./../pages/search.jsp");
else if (actionId.equals("first"))
List completeRecords = (List)session.getAttribute("CompleteSearchRecords");
int fromRec = 0;
int toRec = 0;
String backEnb = "";
String nextEnb = "";
if (completeRecords.size() > noOFrecordsPerPage)
toRec = noOFrecordsPerPage;
backEnb = "false";
nextEnb = "true";
else
toRec = completeRecords.size();
backEnb = "false";
nextEnb = "false";
List subList = completeRecords.subList(fromRec, toRec);
session.setAttribute("CompleteSearchRecords", completeRecords);
session.setAttribute("DisplaySearchRecords", subList);
session.setAttribute("fromRec", new Integer(fromRec));
session.setAttribute("toRec", new Integer(toRec));
session.setAttribute("nextEnb", nextEnb);
session.setAttribute("backEnb", backEnb);
session.setAttribute("recsPerPage", new Integer(noOFrecordsPerPage));
res.sendRedirect("./../pages/SearchResults.jsp");
else if (actionId.equals("last"))
List completeRecords = (List)session.getAttribute("CompleteSearchRecords");
int fromRec = 0;
int toRec = completeRecords.size();
String backEnb = "";
String nextEnb = "";
if (noOFrecordsPerPage > completeRecords.size())
fromRec = 0;
backEnb = "false";
nextEnb = "false";
else
fromRec = completeRecords.size() - noOFrecordsPerPage;
backEnb = "true";
nextEnb = "false";
List subList = completeRecords.subList(fromRec, toRec);
session.setAttribute("CompleteSearchRecords", completeRecords);
session.setAttribute("DisplaySearchRecords", subList);
session.setAttribute("fromRec", new Integer(fromRec));
session.setAttribute("toRec", new Integer(toRec));
session.setAttribute("nextEnb", nextEnb);
session.setAttribute("backEnb", backEnb);
session.setAttribute("recsPerPage", new Integer(noOFrecordsPerPage));
res.sendRedirect("./../pages/SearchResults.jsp");
else if (actionId.equals("back"))
List completeRecords = (List)session.getAttribute("CompleteSearchRecords");
int fromRec = ((Integer)session.getAttribute("fromRec")).intValue();
int toRec = ((Integer)session.getAttribute("toRec")).intValue();
toRec = fromRec;
if (fromRec - noOFrecordsPerPage > 0)
session.setAttribute("backEnb", "true");
fromRec -= noOFrecordsPerPage;
else
fromRec = 0;
session.setAttribute("backEnb", "false");
session.setAttribute("nextEnb", "true");
session.setAttribute("fromRec", new Integer(fromRec));
session.setAttribute("toRec", new Integer(toRec));
List subList = completeRecords.subList(fromRec, toRec);
session.setAttribute("DisplaySearchRecords", subList);
res.sendRedirect("./../pages/SearchResults.jsp");
else if (actionId.equals("next"))
List completeRecords = (List)session.getAttribute("CompleteSearchRecords");
int fromRec = ((Integer)session.getAttribute("fromRec")).intValue();
int toRec = ((Integer)session.getAttribute("toRec")).intValue();
fromRec = toRec;
if (toRec + noOFrecordsPerPage <= completeRecords.size())
session.setAttribute("nextEnb", "true");
toRec += noOFrecordsPerPage;
else
toRec = completeRecords.size();
session.setAttribute("nextEnb", "false");
session.setAttribute("backEnb", "true");
session.setAttribute("fromRec", new Integer(fromRec));
session.setAttribute("toRec", new Integer(toRec));
List subList = completeRecords.subList(fromRec, toRec);
session.setAttribute("DisplaySearchRecords", subList);
res.sendRedirect("./../pages/SearchResults.jsp");
else if (actionId.equals("download"))
String fileName = req.getParameter("fileName");
String originalFileName = req.getParameter("originalFileName");
doDownload(req, res, fileName, originalFileName);
else
res.sendRedirect("./../pages/login.jsp?userAuthDispMsg=Invalid USER");
public void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException
doGet(req, res);
private void doDownload(HttpServletRequest req, HttpServletResponse resp, String filename, String original_filename)
throws IOException
File f = new File(filename);
int length = 0;
ServletOutputStream op = resp.getOutputStream();
ServletContext context = getServletConfig().getServletContext();
String mimetype = context.getMimeType(filename);
resp.setContentType(mimetype != null ? mimetype : "application/octet-stream");
resp.setContentLength((int)f.length());
resp.setHeader("Content-Disposition", "attachment; filename=\"" + original_filename + "\"");
byte[] bbuf = new byte[10240];
DataInputStream in = new DataInputStream(new FileInputStream(f));
while ((in != null) && ((length = in.read(bbuf)) != -1))
op.write(bbuf, 0, length);
in.close();
op.flush();
op.close();
=========================
anyone please help me on above......Thanks in advance..

Answer 1

Hi jleech,
Thanks for the reply. But deleting all the temporary internet files as also the history files does not seem to have an effect. the doFilter is being called only at the second request. or did i miss anything??
Please help. unable to complete the assignment because of this.
Thank You,
Phani Kanuri