Infinite Loop while reading a file

Question

This is my piece of code where I am trying to read from a file. My file currently has 4 lines but code is not coming out of the loop after reading those lines.

    public class ViewServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    doPost(request,response);
}

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
    System.out.println("Logging in..");
    // retrieving values entered in form
    String uname = request.getParameter("uname");
    String pwd = (String) request.getParameter("pwd");

    if (uname.equals("admin") && pwd.equals("admin")) {

        try {
            viewDetails();
            System.out.println("Redirecting to view page..");
            response.sendRedirect("view.jsp");
        } catch (Exception e) {

        }
    } 
        }

public void viewDetails() throws Exception{
    System.out.println("Reading Data..");
    BufferedReader input = new BufferedReader(new FileReader("H:/Workspace/teamRecordsApp/WebContent/records.txt"));
    String record;
    String[] split =new String[5];

    ArrayList cuid = new ArrayList();
    ArrayList fname = new ArrayList();
    ArrayList lname = new ArrayList();
    ArrayList mobile = new ArrayList();
    ArrayList desk = new ArrayList();
    int count = 0;
    while((record=input.readLine()) != null){
        split = record.split(",");
        System.out.println("Record is : "+split[0]+","+split[1]+","+split[2]+","+split[3]+","+split[4]);
        cuid.add(split[0]);
        fname.add(split[1]);
        lname.add(split[2]);
        mobile.add(split[3]);
        desk.add(split[4]);
        count = count+1;

    }
    input.close();
    System.out.println("Reading Done...");
    Utils utils = new Utils();
    utils.setCuid(cuid);
    utils.setFname(fname);
    utils.setLname(lname);
    utils.setMobile(mobile);
    utils.setDesk(desk);
    utils.setCount(count);
    System.out.println("Total records : "+count);


}

}

*added whole servlet class now.

---

Console shows:

Logging in..
Reading Data..
Record is : 12,e,e,1234567890,1234
Record is : 12,e,e,1234567890,1234
Record is : 12,e,e,1234567890,1234

Record is : 12,e,e,1234567890,123

After adding printStackTrace() in file,the exception I was getting is attached below. As said by @Pshemo, the last line which was empty was giving this exception. I was not able to figure this out by seeing the file and adding printStackTrace did the trick. Thanks a lot @Pshemo and others for helping!

java.lang.ArrayIndexOutOfBoundsException: 1
at ViewServlet.viewDetails(ViewServlet.java:54)
at ViewServlet.doPost(ViewServlet.java:31)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)

Answer 1

Since you invoke viewDetails(); in try-catch block, but you don't handle exception (you don't even print its stack trace)

} catch (Exception e) {
    //nothing here... :/
}

I assume that exception was thrown inside your loop before "Reading Done..." massage. Exception could be caused by many things like if your file would have some empty line your loop you would read it "" and to split it on , which would create one element array {""} and then by using split[1] you could get IndexOutOfBoundException. But that is just one of possibilities. To make sure what is wrong with your code add

e.printStackTrace(); 

to your catch (Exception e) block.