Cannot access jsp page when servlet is running

Does your thread use ALL of the processor time?

I am not sure. What should i do in the thread.

Thanx

Looks like it. cpu usage is 100%. I dont have that
thread only 6%. How can solve this problem ?

Thanx

Hmmm....can you post your servlet and thread code?

I just put yield() in the thread code. Now the cpu
usage is 1%. But still cannot access the jsp page.  


Servlet
-------

public class PremadeENCs extends HttpServlet {

   public void init (ServletConfig config) throws ServletException {

          String chartServerHome = "";
          super.init(config);

          try {
               Process p1 = Runtime.getRuntime().exec("cmd.exe /c echo %CHART_HOME%");
               InputStream is1 = p1.getInputStream();
               BufferedReader br1 = new BufferedReader (new InputStreamReader(is1));
               chartServerHome = br1.readLine();
               br1.close();
               is1.close();
          }
          catch (IOException e) {
                 System.out.println("PremadeENCs" + e.getMessage());
          }

          String     dbDriver="sun.jdbc.odbc.JdbcOdbcDriver";
          String     xmlFile = chartServerHome + "\\Support\\Servlet\\ENCZippingArgs.xml";
          long       DELAY = 7200000L; // 60*60*1000*2 every 2 hours 10000L;

          cMakePremadeENCs runner = new cMakePremadeENCs(dbDriver, xmlFile, DELAY);
          runner.run();

   }
}

Thread class
------------

import java.util.*;

public class cMakePremadeENCs extends Thread {

   private String dbDriver;
   private String xmlFile;
   private long DELAY;

   public cMakePremadeENCs(String dbDriver, String xmlFile, long DELAY) {
          super();
          this.dbDriver = dbDriver;
          this.xmlFile = xmlFile;
          this.DELAY = DELAY;
   }

   public void run() {
          while(true) {
               try {
                   doProcess();
                   sleep(this.DELAY);
                   yield();
               }
               catch (InterruptedException ex) {
                      ex.printStackTrace();  // shouldn't happen
               }
          } // while
   }

   public void doProcess() {

          ArrayList  argumentSetsList;
          DbBean db;

          cArgumentSets argumentSets = new cArgumentSets();
          argumentSets.setXMLFile(this.xmlFile);
          argumentSets.createFromXML();

          argumentSetsList = argumentSets.getArgumentSets();

          db = new DbBean();
          db.setDbDriver(this.dbDriver);

          for (int idx=0; idx <= 4; idx++) {
               cZipping zipping = new cZipping(db);
               cArgumentSet argumentSet = new cArgumentSet();
               argumentSet = (cArgumentSet)argumentSetsList.get(idx);
               zipping.makeConnection(argumentSet);
               zipping.setEncRoot();
               zipping.mainProcess(argumentSet);
               zipping.closeConnection();
          } // for

   }
}

it *might* help....

And it will show if it is running :-)

Thanx alot Tim. It works fine.

But why ?

I set the  priority to 1. (lowest ?)
 runner.setPriority(1);

But when the thread is running i cannot run some things.
Any idea ?

Thanx alot. Appreciate alot your help.

Not 100% sure why my one works, and yours doesn't...

I know that you should only extend Thread if you want to alter it's behaviour from the default -- but that's more of an Object Oriented design pattern than a hard and fast rule...

Maybe Tomcat was getting locked at the end of the init() method, as it was waiting for the Thread to end...

------------

> I set the  priority to 1. (lowest ?)
> runner.setPriority(1);

I can never remember which is min...

So I always use:

runner.setPriority( Thread.MIN_PRIORITY ) ;

If stuff still doesn't really work when it is running, I guess it is the fault of the DBBean or cZipping classes being too processor hungry :-(

Maybe the odd Thread.yield() in their most busy sections would ease the pain a little?

Glad I could help :-)

Even if I couldn't really explain ;-)

Tim

Thanx alot again Time.
Have a nice day.

:-)