Re: Thanks: Re: Fed up to the back teeth with tomcat !!!
- Original Message - From: "Jeff Kilbride" [EMAIL PROTECTED] To: [EMAIL PROTECTED]; "Andy C" [EMAIL PROTECTED] Sent: Wednesday, April 11, 2001 11:25 PM Subject: Re: Thanks: Re: Fed up to the back teeth with tomcat !!! Hi Andy, Did you ever post your configuration? I would be interested in what OS; Tomcat/Apache versions; JVM; DB backend and driver; whether or not you're I have to admit that the configuration is a little complex, mostly because of legacy database and servlets left over from the JavaWebserver version. Here goes though: Server is NT2000 Apache is 1.3.12 with mod_jk Tomcat is 3.2.2.b2 (I upgraded from 3.2.1 in the hope it would fix the problem.) JVM is 1.1.6 (old version but it's the only one that would run a legacy servlet) Databases are: mysql 3.23.28 (Handles all the main jsp stories) SQL server V7 (Handles servlet requests for release dates) JDBC bridge to mysql is mm-mysql-2.0.4 JDBC-ODBC bridge for SQL server (This could be the problem) Hope this is of interest. Andy C Editor R2 Project http://www.r2-dvd.org
RE: Fed up to the back teeth with tomcat !!!
I have had no trouble with Apache and Tomcat running A MySQL database, the mm JDBC library behaves itself impeccably. So I think the problem is as the others have said not likely to lie in the JDBC not in Tomcat/Apache. IMHO: before you go blaming something in public you should first identify the problem lies actually with the product you are slagging. Perhaps you should change your database to mysql! -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Fernando Padilla Sent: Thursday, April 12, 2001 6:33 AM To: [EMAIL PROTECTED] Subject: Re: Fed up to the back teeth with tomcat !!! Hmm, interesting.. I did have a similar issue with an Oracle driver a while back. Yes, the Debugging helped alot. So I was driven to doing a System.gc(); after and/or before every statement... :) I think discovered this, assuming that all of that io and String creation forced a gc... and it seems to work now :):) On Wed, 11 Apr 2001, Lyle H. Ward wrote: Since you are using SQL server, are you using ODBC? There is a bug in ODBC that stops the [web] service. It doesn't affect all installations. If this is what's happening, there is an awful work-around. Turn on ODBC tracing. It prevents the service from halting but creates a monster log file. At 08:11 PM 4/11/2001 +0100, you wrote: I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already. It keeps falling over with absolutly no error *** log messages at all. I am at my wits end, not to mention my poor users who have had to put up with this service for the past month. I am totaly lost now as to where to look for solutions So can someone please recomend a good webserver that will run .jsp and servlets pages and integrates well with a SQL server ? I used to run Java Webserver 2.0 would going back to that help ? Andy C Editor R2 Project http://www.r2-dvd.org (lets hopr you don't see a 500 internal error message.)
re: Fed up to the back teeth with tomcat !!!
- Original Message - From: "Sandy McPherson" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 9:06 AM Subject: RE: Fed up to the back teeth with tomcat !!! IMHO: before you go blaming something in public you should first identify the problem lies actually with the product you are slagging. Perhaps you should change your database to mysql! Yes, I would like to apologise for that. Please understand last night I was extremly irratable and unreasonable after a day of frustration. Note: I am uses mysql as well as SQL-server7.0. As I have intimated in another message SQL-server is being used as it is is a "legacy" database. The main page is generated from a mysql databse, only release date queries are being generated from SQL-server. I also have the problem that after a month of trying to find out where the problem lies (by examing logs, hammering a test server with request etc) I am no nearer to the truth. I will however persevere. BTW Is there an easy way to import a SQL-Server database into mysql ? At least that way I could dump the jdbc-odbc bridge ? Regards Andy C Editor R2 project http://www.r2-dvd.org
Re: Fed up to the back teeth with tomcat !!!
Hi, we also use the same configuration (5 * RH Linux 6, Tomcat 3.2.1, Apache 1.3.9, Sun JDK 1.2, Alteon web load balancer) serving 2 pages per day and connecting to DB using RMI, we only restart on application updates (3 months) Arthur Veinstein - Original Message - From: "Kevin Sangeelee" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 1:26 AM Subject: RE: Fed up to the back teeth with tomcat !!! And another, we're serving up 5000 pages per day from our application (April stats), Tomcat has never crashed, and has run for well over a month without hitch (restarting Tomcat only necessary when the application gets updated). RH Linux 6, Tomcat 3.2.1, Apache 1.3.9, Sun JDK 1.2 Kevin On Wed, 11 Apr 2001, Randy Layman wrote: I have a success story to the contrary - using Windows NT 4, Tomcat 3.2.1, and IIS 4 we are serving a decent sized application with no problems. We've been averaging uptimes of about 5 - 6 days before the machine is restarted because of other software on the machine. No detectable resource loss, no crashes.
Re: Fed up to the back teeth with tomcat !!!
I use Tomcat 3.2.1, Apache 1.3.12, mod_jk (own build) on a Linux RedHat 6.2 box (kernel 2.2.14). The database is MySQL 3.23 and I use the mm JDBC driver. The application has worked perfectly great since the beginning of March with a medium and sometimes heavy charge, without any rebooting... Before putting fire to Tomcat just because it is a free software, you should take a look at the other over-expensive products from big (and reliable ?) company... You should maybe use one of the new service pack/patches that makes Win2K a little bit less a beta product... By the way, what are the others softwares running on your machine ? (There's always a lot of stuff that Win2K settles on your machine without any warning. It needs long time before having a slightly clean Win2K server.) I don't want to start a war, I use a lot of Microsoft products and I'm happy with them (Office is really great). But when you set up a server, you have to take EVERYTHING into account. Anyway, the use of ODBC with SQL Server is the right choice because it is the natural and native way to talk to a SQL Server database. Benot -Message d'origine- De : Andy C [mailto:[EMAIL PROTECTED]] Envoy : jeudi 12 avril 2001 09:23 : [EMAIL PROTECTED] Objet : Re: Thanks: Re: Fed up to the back teeth with tomcat !!! - Original Message - From: "Jeff Kilbride" [EMAIL PROTECTED] To: [EMAIL PROTECTED]; "Andy C" [EMAIL PROTECTED] Sent: Wednesday, April 11, 2001 11:25 PM Subject: Re: Thanks: Re: Fed up to the back teeth with tomcat !!! Hi Andy, Did you ever post your configuration? I would be interested in what OS; Tomcat/Apache versions; JVM; DB backend and driver; whether or not you're I have to admit that the configuration is a little complex, mostly because of legacy database and servlets left over from the JavaWebserver version. Here goes though: Server is NT2000 Apache is 1.3.12 with mod_jk Tomcat is 3.2.2.b2 (I upgraded from 3.2.1 in the hope it would fix the problem.) JVM is 1.1.6 (old version but it's the only one that would run a legacy servlet) Databases are: mysql 3.23.28 (Handles all the main jsp stories) SQL server V7 (Handles servlet requests for release dates) JDBC bridge to mysql is mm-mysql-2.0.4 JDBC-ODBC bridge for SQL server (This could be the problem) Hope this is of interest. Andy C Editor R2 Project http://www.r2-dvd.org
RE: Fed up to the back teeth with tomcat !!!
You could allways get the source to Tomcat, and insert your own logging!!! Ooh now, there's an idea :-) -Original Message- From: Andy C [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 9:34 AM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: re: Fed up to the back teeth with tomcat !!! - Original Message - From: "Sandy McPherson" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 9:06 AM Subject: RE: Fed up to the back teeth with tomcat !!! IMHO: before you go blaming something in public you should first identify the problem lies actually with the product you are slagging. Perhaps you should change your database to mysql! Yes, I would like to apologise for that. Please understand last night I was extremly irratable and unreasonable after a day of frustration. Note: I am uses mysql as well as SQL-server7.0. As I have intimated in another message SQL-server is being used as it is is a "legacy" database. The main page is generated from a mysql databse, only release date queries are being generated from SQL-server. I also have the problem that after a month of trying to find out where the problem lies (by examing logs, hammering a test server with request etc) I am no nearer to the truth. I will however persevere. BTW Is there an easy way to import a SQL-Server database into mysql ? At least that way I could dump the jdbc-odbc bridge ? Regards Andy C Editor R2 project http://www.r2-dvd.org
Re: Fed up to the back teeth with tomcat !!!
You may have already tried this, but you could always download a different servlet engine such as JRun and try out your servlets with the new engine. If you see the same problems then the problem probably isn't with tomcat. Jon. On Thursday 12 April 2001 08:34, you wrote: - Original Message - From: "Sandy McPherson" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 9:06 AM Subject: RE: Fed up to the back teeth with tomcat !!! IMHO: before you go blaming something in public you should first identify the problem lies actually with the product you are slagging. Perhaps you should change your database to mysql! Yes, I would like to apologise for that. Please understand last night I was extremly irratable and unreasonable after a day of frustration. Note: I am uses mysql as well as SQL-server7.0. As I have intimated in another message SQL-server is being used as it is is a "legacy" database. The main page is generated from a mysql databse, only release date queries are being generated from SQL-server. I also have the problem that after a month of trying to find out where the problem lies (by examing logs, hammering a test server with request etc) I am no nearer to the truth. I will however persevere. BTW Is there an easy way to import a SQL-Server database into mysql ? At least that way I could dump the jdbc-odbc bridge ? Regards Andy C Editor R2 project http://www.r2-dvd.org
Re: Fed up to the back teeth with tomcat !!!
- Original Message - From: "Benot Jacquemont" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 9:50 AM Subject: Re: Fed up to the back teeth with tomcat !!! Before putting fire to Tomcat just because it is a free software, you should take a look at the other over-expensive products from big (and reliable ?) company... You should maybe use one of the new service pack/patches that makes Win2K a little bit less a beta product... Please, I'v no wish to start a war here For the most part I am very happy with Tomcat, the development of the application went reasonably smothly and it was easy to set up.Both Apache and mySQL work like a dream so there's two "freeware" solutions I'm over the moon with. If only I could reproduce the fault and diagnose it I would be very happy ! I will howver continue to work on the probelm. As one poster suggeted if neccessary I'll hack the source code of tomcat to generate the logs I need ! Regards Andy C
RE: Fed up to the back teeth with tomcat !!!
BTW Is there an easy way to import a SQL-Server database into mysql ? At least that way I could dump the jdbc-odbc bridge ? if you have fewer than 100's of tables use rational rose to de-construct the SQL server into DDL, throw away all the relationship definitions [sic], switch a few data types, select everything from SQL server into a tab delim or csv file, and bingo.. ready for import into mysql
Re: Fed up to the back teeth with tomcat !!!
Andy C wrote:
- Original Message -
From: "Sandy McPherson" [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, April 12, 2001 9:06 AM
Subject: RE: Fed up to the back teeth with tomcat !!!
IMHO: before you go blaming something in public you should first identify
the problem lies actually with the product you are slagging. Perhaps you
should change your database to mysql!
Yes, I would like to apologise for that. Please understand last night I was
extremly irratable and unreasonable after a day of frustration.
I know the feeling...
Here's a concrete suggestion to improve your debugging
Your users are probably seeing the stack trace you yourself want to see,
so set up an error page which writes any exceptions to a log file and
possibly mails the exceptions thrown in the production system to you. In
each servlet you should do a catch( Throwable ex ) around the servlet
body and report the exception before re-throwing the it.
I have attached a tag class which you can hack about to acheive the
desired effect. I have hacked out most of the stuff specific to my
environment, so it may not work "out of the box". I guess you can figure
out what should go in the TLD.
The mail is probably a luxury, but it will wake up your operators!
/*
** $Log: MailException.java,v $
** Revision 1.2 2001/02/23 17:20:37 sandy
** Tidy up exception handling
**
** Revision 1.1 2001/02/15 15:17:02 sandy
** Make error page mail exceptions to admin.
**
*/
package com.mapquest.environment;
import java.lang.*;
import java.io.*;
import java.sql.SQLException;
import java.util.Properties;
import javax.mail.*;
import javax.mail.internet.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
/**
** Class to mail an exception to the admninistrator
** p
** This is a tag which should be used from a JSP error page
** /p
*/
public class MailException extends TagSupport
{
/**
** Constructs a mailable exception
** p
** /p
** @exception The exception whose details should be mailed
*/
public int doStartTag( )
throws JspTagException
{
try
{
ServletContext application = pageContext.getServletContext( );
Throwable exception = (Throwable)pageContext.getAttribute(
"exception" );
StringWriter trace = new StringWriter( );
PrintWriter traceWriter = new PrintWriter ( trace );
exception.printStackTrace( traceWriter );
JspWriter out = pageContext.getOut( );
System.out.println( trace.toString( ) );
try
{
SQLException dbex = (SQLException)exception;
System.out.println( "SQL ANSI 92 State = "+dbex.getSQLState( )
);
System.out.println( "SQL Error Code = "+dbex.getErrorCode( ) );
}
catch( java.lang.ClassCastException ex )
{
}
try
{
//
// see if this is a servlet exception
//
Throwable rootcause =
((ServletException)exception).getRootCause( );
if ( rootcause != null )
{
StringWriter roottrace = new StringWriter( );
PrintWriter roottraceWriter = new PrintWriter ( roottrace );
rootcause.printStackTrace( roottraceWriter );
System.out.println( "Root Cause:" );
System.out.println( roottrace.toString( ) );
SQLException dbex = SQLException)rootcause;
System.out.println( "SQL ANSI 92 State =
"+dbex.getSQLState( ) );
System.out.println( "SQL Error Code = "+dbex.getErrorCode(
) );
}
}
catch( java.lang.ClassCastException ex )
{
}
//
// mail the message
//
String smtphost = application.getInitParameter(
"MAIL.SMTP.HOST" );
if ( smtphost == null )
{
throw new JspTagException( "MAIL.SMTP.HOST not set");
}
String to = application.getInitParameter("MAIL.ADMIN.EMAIL");
if ( to == null )
{
throw new JspTagException( "MAIL.ADMIN.EMAIL not set");
}
//
RE: Fed up to the back teeth with tomcat !!!
Hi Alistair, I tried to get to the Virtuso link www.openlink.com buts its a redirect to internet.com Was your email some kind of clever spam :-) -Original Message- From: Alistair Hopkins [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 11:48 AM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: RE: Fed up to the back teeth with tomcat !!! For more complex data transfers between databases, take a look at virtuoso at openlink.com. It's a meta-database-engine that lets you write SQl loading from one database into another. This is nice as you can remove early-effort-stupidities and rearrange your schema when moving db. Al. -Original Message- From: Danny Angus [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 11:13 AM To: [EMAIL PROTECTED] Subject: RE: Fed up to the back teeth with tomcat !!! BTW Is there an easy way to import a SQL-Server database into mysql ? At least that way I could dump the jdbc-odbc bridge ? if you have fewer than 100's of tables use rational rose to de-construct the SQL server into DDL, throw away all the relationship definitions [sic], switch a few data types, select everything from SQL server into a tab delim or csv file, and bingo.. ready for import into mysql
Re: Fed up to the back teeth with tomcat !!!
Many Many thanks for that, I'll get to it right away. Andy - Original Message - From: "Sandy McPherson" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 11:48 AM Subject: Re: Fed up to the back teeth with tomcat !!! Andy C wrote: - Original Message - From: "Sandy McPherson" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Here's a concrete suggestion to improve your debugging Your users are probably seeing the stack trace you yourself want to see, so set up an error page which writes any exceptions to a log file and possibly mails the exceptions thrown in the production system to you. In each servlet you should do a catch( Throwable ex ) around the servlet body and report the exception before re-throwing the it. I have attached a tag class which you can hack about to acheive the desired effect. I have hacked out most of the stuff specific to my environment, so it may not work "out of the box". I guess you can figure out what should go in the TLD. The mail is probably a luxury, but it will wake up your operators!
RE: Fed up to the back teeth with tomcat !!!
very sorry. try www.openlinksw.com/virtuoso no spam is clever spam did I mention it's free for 4 connections? but not opensource... -Original Message- From: Samson, Lyndon [IT] [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 12:27 PM To: '[EMAIL PROTECTED]' Subject: RE: Fed up to the back teeth with tomcat !!! Hi Alistair, I tried to get to the Virtuso link www.openlink.com buts its a redirect to internet.com Was your email some kind of clever spam :-) -Original Message- From: Alistair Hopkins [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 11:48 AM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: RE: Fed up to the back teeth with tomcat !!! For more complex data transfers between databases, take a look at virtuoso at openlink.com. It's a meta-database-engine that lets you write SQl loading from one database into another. This is nice as you can remove early-effort-stupidities and rearrange your schema when moving db. Al. -Original Message- From: Danny Angus [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 11:13 AM To: [EMAIL PROTECTED] Subject: RE: Fed up to the back teeth with tomcat !!! BTW Is there an easy way to import a SQL-Server database into mysql ? At least that way I could dump the jdbc-odbc bridge ? if you have fewer than 100's of tables use rational rose to de-construct the SQL server into DDL, throw away all the relationship definitions [sic], switch a few data types, select everything from SQL server into a tab delim or csv file, and bingo.. ready for import into mysql
RE: Fed up to the back teeth with tomcat !!!
In the BugParade, bug #4113225 (at http://developer.java.sun.com/developer/bugParade/bugs/4113225.html) details what I believe to be your problem - concurrent access of ODBC crashes the server. There is even sample code to reproduce the problem. Sun's evaluation - Not supported, not to be fixed, use commercial. Also, while JDK 1.1.6 does run on 2000, Sun only recommends using the JDK 1.1.8 on Windows 2000 (and only JDK 1.1.8_007 on Pentium IV), if you are going to use JDK 1.1.x. (I couldn't find any specific warnings but did find a few bugs in the Bug Parade). So, I would suggest change your database drivers. I believe that there is a free software effort at freetds.org and I would like to plug the drivers we use from inetsoftware.de (we use it without any problems). I would also suggest upgrading your JDK to 1.1.8. I would not use MySQL in place of SQL Server. If you must leave SQL Server, try PostgreSQL. (MySQL doesn't pass the ACID test, which causes all sorts of problems for people worried about data consistency and integrity) Randy -Original Message- From: Andy C [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 7:30 AM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Re: Fed up to the back teeth with tomcat !!! Many Many thanks for that, I'll get to it right away. Andy - Original Message - From: "Sandy McPherson" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 11:48 AM Subject: Re: Fed up to the back teeth with tomcat !!! Andy C wrote: - Original Message - From: "Sandy McPherson" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Here's a concrete suggestion to improve your debugging Your users are probably seeing the stack trace you yourself want to see, so set up an error page which writes any exceptions to a log file and possibly mails the exceptions thrown in the production system to you. In each servlet you should do a catch( Throwable ex ) around the servlet body and report the exception before re-throwing the it. I have attached a tag class which you can hack about to acheive the desired effect. I have hacked out most of the stuff specific to my environment, so it may not work "out of the box". I guess you can figure out what should go in the TLD. The mail is probably a luxury, but it will wake up your operators!
RE: Fed up to the back teeth with tomcat !!!
Yahoo says www.openlinksw.com Virtuso database At 12:27 PM 4/12/2001 +0100, you wrote: Hi Alistair, I tried to get to the Virtuso link www.openlink.com buts its a redirect to internet.com Was your email some kind of clever spam :-) -Original Message- From: Alistair Hopkins [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 11:48 AM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: RE: Fed up to the back teeth with tomcat !!! For more complex data transfers between databases, take a look at virtuoso at openlink.com. It's a meta-database-engine that lets you write SQl loading from one database into another. This is nice as you can remove early-effort-stupidities and rearrange your schema when moving db. Al. -Original Message- From: Danny Angus [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 11:13 AM To: [EMAIL PROTECTED] Subject: RE: Fed up to the back teeth with tomcat !!! BTW Is there an easy way to import a SQL-Server database into mysql ? At least that way I could dump the jdbc-odbc bridge ? if you have fewer than 100's of tables use rational rose to de-construct the SQL server into DDL, throw away all the relationship definitions [sic], switch a few data types, select everything from SQL server into a tab delim or csv file, and bingo.. ready for import into mysql
Re: Fed up to the back teeth with tomcat !!!
what did you find that was better? Robert Keddieweb developmentMarion County, FL [EMAIL PROTECTED] 04/11/01 03:11PM I am fed up to the back teeth with Tomcat under Apache. I'm trying to runa 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehadto reset the damn server 3 times today already.It keeps falling overwith absolutly no error *** log messages at all. I am at my wits end,notto mention my poor users who have had to put up with this service for thepast month. I am totaly lost now as to where to look for solutionsSo can someone please recomend a good webserver that will run .jsp andservlets pages and integrates well with a SQL server ? I used torun Java Webserver 2.0 would going back to that help ?Andy CEditor R2 Projecthttp://www.r2-dvd.org(lets hopr you don't see a 500 internal error message.)
RE: Fed up to the back teeth with tomcat !!!
possibly mails the exceptions thrown in the production system Mailing responsible people (other than yourself, obviously) for every 500 error is a *great* wakeup call to nail shoddy workmanship.
Re: Fed up to the back teeth with tomcat !!!
At WorldCom our group is using Tomcat 3.2.1 along with various versions of Apache and Solaris in production environments for Intranet applications. We have one production box serving several apps via virtual hosts, each with their own Tomcat instance. They all get thousands of hits a day (one of them averages over 10k) and we never have to restart the server for anything other than to upgrade the application files periodically. Now that I have fixed the utilization problems I am VERY happy with the stability and performance of Tomcat in a production environment, and my bosses are too. :) -Scott -- Scott Tatum | [EMAIL PROTECTED] Senior Applications Developer, Special Projects WorldCom | http://www.wcom.com/ Srinivas Kurella wrote: I have the same problem. I am running tomcat 3.2.1 on solaris without apache. There is not much of a db activity going on. To me it looks as if tomcat dies even if there is no activity or hits after a while. From the other messages , it looks like it is a bit more stable on Linux than other OSs. Srini -Original Message- From: Kevin Sangeelee [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 11, 2001 4:27 PM To: [EMAIL PROTECTED] Subject: RE: Fed up to the back teeth with tomcat !!! And another, we're serving up 5000 pages per day from our application (April stats), Tomcat has never crashed, and has run for well over a month without hitch (restarting Tomcat only necessary when the application gets updated). RH Linux 6, Tomcat 3.2.1, Apache 1.3.9, Sun JDK 1.2 Kevin On Wed, 11 Apr 2001, Randy Layman wrote: I have a success story to the contrary - using Windows NT 4, Tomcat 3.2.1, and IIS 4 we are serving a decent sized application with no problems. We've been averaging uptimes of about 5 - 6 days before the machine is restarted because of other software on the machine. No detectable resource loss, no crashes.
Update: Fed up to the back teeth with tomcat !!!
Many thanks to all who have taken the time to answer our rather irratable plea for help. Although we haven't 100% got the solution, following advice from Randy Layman, we have upgraded our JVM to 1.1.8 (remember there is a lagacy servlet that will not run on a higher JVM). We have also changed from the sun JDBC-ODBC driver to a type 4 JDBC driver from http://www.freetds.org/ for access to the SQL Server database. We will report back if these changes stabalise the platform and keep on running. Many thanks once again to one and all... Andy C Editor R2 project http://www.r2-dvd.org
Re: Fed up to the back teeth with tomcat !!!
Hi All, Is it possible to use connection pooling using jConnect 5.2 , tomcat 3.2. I want to use the file server as my service provider cause we dont want to implement LDAP server. what are the necessary configuration steps needed to do that (if possible). Kindly advice. Thanks and Regards Manish
Bad news 2nd Update: Fed up to the back teeth with tomcat !!!
Sadly this has made no difference at all. Tomcat fell over after about 2 hours usage so it's back to the drawing board. Andy C -Original Message- From: Andy C [EMAIL PROTECTED] To: [EMAIL PROTECTED] [EMAIL PROTECTED] Date: 12 April 2001 16:56 Subject: Update: Fed up to the back teeth with tomcat !!! Many thanks to all who have taken the time to answer our rather irratable plea for help. Although we haven't 100% got the solution, following advice from Randy Layman, we have upgraded our JVM to 1.1.8 (remember there is a lagacy servlet that will not run on a higher JVM). We have also changed from the sun JDBC-ODBC driver to a type 4 JDBC driver from http://www.freetds.org/ for access to the SQL Server database.
Re: Thanks: Re: Fed up to the back teeth with tomcat !!!
If I were to pick the weakest link, it'd probably be the jdbc-odbc bridge. FYI, for my own stress tests, I was able to run 24 hours at 20+ hits/second using Tomcat 3.2.1, IBMJava2-13, Apache 1.3.19, mod_jk w/ajp13, into a MySQL 3.23.35 database. This was all running on a fairly cheap linux box -- RedHat 6.2, 2.2.17 kernel, 128MB RAM, everything on one IDE drive. I was using a test suite with 25 concurrent threads on another machine (WinNT) connected by a 100bT ethernet doing simple insert statements. I actually got the Tomcat/Linux box up to 54 inserts per second, but the load average skyrocketed so I cut it back to something reasonable. Almost 2 million records into my database without a glitch. I was actually very surprised by the performance, since I hadn't tweaked anything and I was using the default Tomcat config. Granted, my test was pretty simple. I was only using one servlet and no .jsp pages. Are there any alternatives to the jdbc-odbc bridge? I thought that you used to be able to use the Sybase drivers to connect to MS-SQL -- but that may have been a long time ago and, obviously, nothing that was every officially supported. Thanks, --jeff - Original Message - From: "Andy C" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 12:22 AM Subject: Re: Thanks: Re: Fed up to the back teeth with tomcat !!! - Original Message - From: "Jeff Kilbride" [EMAIL PROTECTED] To: [EMAIL PROTECTED]; "Andy C" [EMAIL PROTECTED] Sent: Wednesday, April 11, 2001 11:25 PM Subject: Re: Thanks: Re: Fed up to the back teeth with tomcat !!! Hi Andy, Did you ever post your configuration? I would be interested in what OS; Tomcat/Apache versions; JVM; DB backend and driver; whether or not you're I have to admit that the configuration is a little complex, mostly because of legacy database and servlets left over from the JavaWebserver version. Here goes though: Server is NT2000 Apache is 1.3.12 with mod_jk Tomcat is 3.2.2.b2 (I upgraded from 3.2.1 in the hope it would fix the problem.) JVM is 1.1.6 (old version but it's the only one that would run a legacy servlet) Databases are: mysql 3.23.28 (Handles all the main jsp stories) SQL server V7 (Handles servlet requests for release dates) JDBC bridge to mysql is mm-mysql-2.0.4 JDBC-ODBC bridge for SQL server (This could be the problem) Hope this is of interest. Andy C Editor R2 Project http://www.r2-dvd.org
Re: Fed up to the back teeth with tomcat !!!
Can you use BCP to output to a delimited file? Or is BCP only supported by Sybase? I always forget between those two... --jeff - Original Message - From: "Andy C" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 1:34 AM Subject: re: Fed up to the back teeth with tomcat !!! - Original Message - From: "Sandy McPherson" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 9:06 AM Subject: RE: Fed up to the back teeth with tomcat !!! IMHO: before you go blaming something in public you should first identify the problem lies actually with the product you are slagging. Perhaps you should change your database to mysql! Yes, I would like to apologise for that. Please understand last night I was extremly irratable and unreasonable after a day of frustration. Note: I am uses mysql as well as SQL-server7.0. As I have intimated in another message SQL-server is being used as it is is a "legacy" database. The main page is generated from a mysql databse, only release date queries are being generated from SQL-server. I also have the problem that after a month of trying to find out where the problem lies (by examing logs, hammering a test server with request etc) I am no nearer to the truth. I will however persevere. BTW Is there an easy way to import a SQL-Server database into mysql ? At least that way I could dump the jdbc-odbc bridge ? Regards Andy C Editor R2 project http://www.r2-dvd.org
Re: Fed up to the back teeth with tomcat !!!
Hi Scott, Just wondering what you meant by "utilization problems". Thanks, --jeff - Original Message - From: "Scott Tatum" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 8:32 AM Subject: Re: Fed up to the back teeth with tomcat !!! At WorldCom our group is using Tomcat 3.2.1 along with various versions of Apache and Solaris in production environments for Intranet applications. We have one production box serving several apps via virtual hosts, each with their own Tomcat instance. They all get thousands of hits a day (one of them averages over 10k) and we never have to restart the server for anything other than to upgrade the application files periodically. Now that I have fixed the utilization problems I am VERY happy with the stability and performance of Tomcat in a production environment, and my bosses are too. :) -Scott -- Scott Tatum | [EMAIL PROTECTED] Senior Applications Developer, Special Projects WorldCom | http://www.wcom.com/ Srinivas Kurella wrote: I have the same problem. I am running tomcat 3.2.1 on solaris without apache. There is not much of a db activity going on. To me it looks as if tomcat dies even if there is no activity or hits after a while. From the other messages , it looks like it is a bit more stable on Linux than other OSs. Srini -Original Message- From: Kevin Sangeelee [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 11, 2001 4:27 PM To: [EMAIL PROTECTED] Subject: RE: Fed up to the back teeth with tomcat !!! And another, we're serving up 5000 pages per day from our application (April stats), Tomcat has never crashed, and has run for well over a month without hitch (restarting Tomcat only necessary when the application gets updated). RH Linux 6, Tomcat 3.2.1, Apache 1.3.9, Sun JDK 1.2 Kevin On Wed, 11 Apr 2001, Randy Layman wrote: I have a success story to the contrary - using Windows NT 4, Tomcat 3.2.1, and IIS 4 we are serving a decent sized application with no problems. We've been averaging uptimes of about 5 - 6 days before the machine is restarted because of other software on the machine. No detectable resource loss, no crashes.
Re: Fed up to the back teeth with tomcat !!!
I'm having this problem as well with the server crashing frequently with no log entries, but in the ssl environment, are there success stories in that environment as well, or has everything that's been working, been in the non-ssl env.? -- Simon Chatfield VP, Software Development Inteflux Inc.
RE: Thanks: Re: Fed up to the back teeth with tomcat !!!
There's a metric buttload of JDBC drivers out there, for every database: http://industry.java.sun.com/products/jdbc/drivers For MS SqlServer alone, they list 27; for ODBC, 19. -- Bill K. -Original Message- From: Jeff Kilbride [mailto:[EMAIL PROTECTED]] Sent: Thursday, April 12, 2001 12:05 PM To: [EMAIL PROTECTED] Subject: Re: Thanks: Re: Fed up to the back teeth with tomcat !!! If I were to pick the weakest link, it'd probably be the jdbc-odbc bridge. FYI, for my own stress tests, I was able to run 24 hours at 20+ hits/second using Tomcat 3.2.1, IBMJava2-13, Apache 1.3.19, mod_jk w/ajp13, into a MySQL 3.23.35 database. This was all running on a fairly cheap linux box -- RedHat 6.2, 2.2.17 kernel, 128MB RAM, everything on one IDE drive. I was using a test suite with 25 concurrent threads on another machine (WinNT) connected by a 100bT ethernet doing simple insert statements. I actually got the Tomcat/Linux box up to 54 inserts per second, but the load average skyrocketed so I cut it back to something reasonable. Almost 2 million records into my database without a glitch. I was actually very surprised by the performance, since I hadn't tweaked anything and I was using the default Tomcat config. Granted, my test was pretty simple. I was only using one servlet and no .jsp pages. Are there any alternatives to the jdbc-odbc bridge? I thought that you used to be able to use the Sybase drivers to connect to MS-SQL -- but that may have been a long time ago and, obviously, nothing that was every officially supported. Thanks, --jeff - Original Message - From: "Andy C" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, April 12, 2001 12:22 AM Subject: Re: Thanks: Re: Fed up to the back teeth with tomcat !!! - Original Message - From: "Jeff Kilbride" [EMAIL PROTECTED] To: [EMAIL PROTECTED]; "Andy C" [EMAIL PROTECTED] Sent: Wednesday, April 11, 2001 11:25 PM Subject: Re: Thanks: Re: Fed up to the back teeth with tomcat !!! Hi Andy, Did you ever post your configuration? I would be interested in what OS; Tomcat/Apache versions; JVM; DB backend and driver; whether or not you're I have to admit that the configuration is a little complex, mostly because of legacy database and servlets left over from the JavaWebserver version. Here goes though: Server is NT2000 Apache is 1.3.12 with mod_jk Tomcat is 3.2.2.b2 (I upgraded from 3.2.1 in the hope it would fix the problem.) JVM is 1.1.6 (old version but it's the only one that would run a legacy servlet) Databases are: mysql 3.23.28 (Handles all the main jsp stories) SQL server V7 (Handles servlet requests for release dates) JDBC bridge to mysql is mm-mysql-2.0.4 JDBC-ODBC bridge for SQL server (This could be the problem) Hope this is of interest. Andy C Editor R2 Project http://www.r2-dvd.org
Re: Fed up to the back teeth with tomcat !!!
I ran into this already myself. I was using the ServerName and ServerAlias
directives in Apache:
ServerName host.com
ServerAlias www.host.com
But my Host directive in server.xml was just for host.com. So, any request
to www.host.com caused the CPU-bound loop. I posted a few days ago asking if
wildcard or multiple host name capability was in the future for the Host
directive, like:
Host *.host.com
OR
Host host.com www.host.com
In my case, I don't want to use two Host directives, because that causes all
of my servlets to be instantiated twice -- once per host. Does anybody know
if pattern matching or multiple host capability will be added to the Host
directive in the future? I'd really like people to be able to pull up my
domain with or without the "www.", without re-initializing my servlets.
Thanks,
--jeff
- Original Message -
From: "Scott Tatum" [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, April 12, 2001 2:22 PM
Subject: Re: Fed up to the back teeth with tomcat !!!
There's an issue involving Tomcat 3.2.1 and its configuration (explained
in the
release notes) where an improper configuration can trigger a CPU-bound
loop.
This is very easy to do when setting up virtual hosts. I posted a few days
ago
with a long explanation of my experiences with vhost setup if you want to
see
more details.
-Scott
Jeff Kilbride wrote:
Hi Scott,
Just wondering what you meant by "utilization problems".
Thanks,
--jeff
- Original Message -
From: "Scott Tatum" [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, April 12, 2001 8:32 AM
Subject: Re: Fed up to the back teeth with tomcat !!!
At WorldCom our group is using Tomcat 3.2.1 along with various
versions of
Apache and Solaris in production environments for Intranet
applications.
We
have one production box serving several apps via virtual hosts, each
with
their
own Tomcat instance. They all get thousands of hits a day (one of them
averages
over 10k) and we never have to restart the server for anything other
than
to
upgrade the application files periodically. Now that I have fixed the
utilization problems I am VERY happy with the stability and
performance of
Tomcat in a production environment, and my bosses are too. :)
-Scott
--
Scott Tatum | [EMAIL PROTECTED]
Senior Applications Developer, Special Projects
WorldCom | http://www.wcom.com/
Srinivas Kurella wrote:
I have the same problem. I am running tomcat 3.2.1 on solaris
without
apache. There is not much of a db activity going on. To me it looks
as
if
tomcat dies even if there is no activity or hits after a while.
From the other messages , it looks like it is a bit more stable on
Linux
than other OSs.
Srini
-Original Message-
From: Kevin Sangeelee [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, April 11, 2001 4:27 PM
To: [EMAIL PROTECTED]
Subject: RE: Fed up to the back teeth with tomcat !!!
And another, we're serving up 5000 pages per day from our
application
(April stats), Tomcat has never crashed, and has run for well over a
month
without hitch (restarting Tomcat only necessary when the application
gets
updated). RH Linux 6, Tomcat 3.2.1, Apache 1.3.9, Sun JDK 1.2
Kevin
On Wed, 11 Apr 2001, Randy Layman wrote:
I have a success story to the contrary - using Windows NT 4,
Tomcat
3.2.1, and IIS 4 we are serving a decent sized application with no
problems.
We've been averaging uptimes of about 5 - 6 days before the
machine is
restarted because of other software on the machine. No detectable
resource
loss, no crashes.
--
Scott Tatum | [EMAIL PROTECTED]
Senior Applications Developer, Special Projects
WorldCom | http://www.wcom.com/
RE: Fed up to the back teeth with tomcat !!!
I understand your frustration, the lack of verbose/clear error messages in the logs is a big problem I am having too. -Mark -Original Message- From: Andy C [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 11, 2001 2:12 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Fed up to the back teeth with tomcat !!! I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already. It keeps falling over with absolutly no error *** log messages at all. I am at my wits end, not to mention my poor users who have had to put up with this service for the past month. I am totaly lost now as to where to look for solutions So can someone please recomend a good webserver that will run .jsp and servlets pages and integrates well with a SQL server ? I used to run Java Webserver 2.0 would going back to that help ? Andy C Editor R2 Project http://www.r2-dvd.org (lets hopr you don't see a 500 internal error message.)
Re: Fed up to the back teeth with tomcat !!!
I'm experiencing the same problem, though not serving as many pages, it goes down without warning or messages about every 2 or 3 days... What's the deal? "Faine, Mark" wrote: I understand your frustration, the lack of verbose/clear error messages in the logs is a big problem I am having too. -Mark -Original Message- From: Andy C [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 11, 2001 2:12 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Fed up to the back teeth with tomcat !!! I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already. It keeps falling over with absolutly no error *** log messages at all. I am at my wits end, not to mention my poor users who have had to put up with this service for the past month. I am totaly lost now as to where to look for solutions So can someone please recomend a good webserver that will run .jsp and servlets pages and integrates well with a SQL server ? I used to run Java Webserver 2.0 would going back to that help ? Andy C Editor R2 Project http://www.r2-dvd.org (lets hopr you don't see a 500 internal error message.)
Re: Fed up to the back teeth with tomcat !!!
This scares me as I'm about to deploy my first big Apache/Tomcat/Postgre site with 3.2.1... Any ideas/solutions the developers can offer would be appreciated. Hunter From: "Andy C" [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] Date: Wed, 11 Apr 2001 20:11:33 +0100 To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Fed up to the back teeth with tomcat !!! I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already.
RE: Fed up to the back teeth with tomcat !!!
I'm in the same situation, we're using tomcat to serve up between 1000-5000 jsp's per day. If this thing is going to start crashing for no reason, it would be nice to know in advance so that we can switch before we get too far into it. Does anyone have any more information about this? -Original Message- From: Hunter Hillegas [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 11, 2001 2:30 PM To: Tomcat User List Subject: Re: Fed up to the back teeth with tomcat !!! This scares me as I'm about to deploy my first big Apache/Tomcat/Postgre site with 3.2.1... Any ideas/solutions the developers can offer would be appreciated. Hunter From: "Andy C" [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] Date: Wed, 11 Apr 2001 20:11:33 +0100 To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Fed up to the back teeth with tomcat !!! I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already.
RE: Fed up to the back teeth with tomcat !!!
We are about to go public with our first web and I am concerned now. Does changing the debug= in server.xml add any more output that you need Andy? From: "Brandon Cruz" <[EMAIL PROTECTED]> Reply-To: [EMAIL PROTECTED] To: <[EMAIL PROTECTED]> Subject: RE: Fed up to the back teeth with tomcat !!! Date: Wed, 11 Apr 2001 14:45:07 -0500 I'm in the same situation, we're using tomcat to serve up between 1000-5000 jsp's per day. If this thing is going to start crashing for no reason, it would be nice to know in advance so that we can switch before we get too far into it. Does anyone have any more information about this? -Original Message- From: Hunter Hillegas [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 11, 2001 2:30 PM To: Tomcat User List Subject: Re: Fed up to the back teeth with tomcat !!! This scares me as I'm about to deploy my first big Apache/Tomcat/Postgre site with 3.2.1... Any ideas/solutions the developers can offer would be appreciated. Hunter From: "Andy C" <[EMAIL PROTECTED]> Reply-To: [EMAIL PROTECTED] Date: Wed, 11 Apr 2001 20:11:33 +0100 To: <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Subject: Fed up to the back teeth with tomcat !!! I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already. Get your FREE download of MSN Explorer at http://explorer.msn.com
RE: Fed up to the back teeth with tomcat !!!
I have a success story to the contrary - using Windows NT 4, Tomcat 3.2.1, and IIS 4 we are serving a decent sized application with no problems. We've been averaging uptimes of about 5 - 6 days before the machine is restarted because of other software on the machine. No detectable resource loss, no crashes. The biggest cause of most people's problems when scaling (that I've seen and helped to fix) is that they use insufficient database drivers that can't support the concurrent load (such as the JDBC-ODBC bridge that can't support two concurrent users). Also, people tend to not remember that only one thread can write to a file/socket at a time. Randy -Original Message- From: Brandon Cruz [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 11, 2001 3:45 PM To: [EMAIL PROTECTED] Subject: RE: Fed up to the back teeth with tomcat !!! I'm in the same situation, we're using tomcat to serve up between 1000-5000 jsp's per day. If this thing is going to start crashing for no reason, it would be nice to know in advance so that we can switch before we get too far into it. Does anyone have any more information about this? -Original Message- From: Hunter Hillegas [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 11, 2001 2:30 PM To: Tomcat User List Subject: Re: Fed up to the back teeth with tomcat !!! This scares me as I'm about to deploy my first big Apache/Tomcat/Postgre site with 3.2.1... Any ideas/solutions the developers can offer would be appreciated. Hunter From: "Andy C" [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] Date: Wed, 11 Apr 2001 20:11:33 +0100 To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Fed up to the back teeth with tomcat !!! I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already.
Re: Fed up to the back teeth with tomcat !!!
I'm using tomcat 3.2.1 on a linux 6.2 machine, same problem with jdk's 1.2.2 and 1.3v2 James Goodwill wrote: Which version of Tomcat are you using? -Original Message- From: Andy C [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 11, 2001 1:12 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Fed up to the back teeth with tomcat !!! I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already. It keeps falling over with absolutly no error *** log messages at all. I am at my wits end, not to mention my poor users who have had to put up with this service for the past month. I am totaly lost now as to where to look for solutions So can someone please recomend a good webserver that will run .jsp and servlets pages and integrates well with a SQL server ? I used to run Java Webserver 2.0 would going back to that help ? Andy C Editor R2 Project http://www.r2-dvd.org (lets hopr you don't see a 500 internal error message.)
RE: Fed up to the back teeth with tomcat !!!
This sounds like a business plan for a little startup consulting company if I ever heard one. I know that Tomcat is the 'reference implementation,' but how do you know when your load/needs outgrow Tomcat? And when they do, what are the alternatives? Craig Pfeifer Software Engineer Aether Systems, Software Products Division 703.847.3303 x2053 [EMAIL PROTECTED] -Original Message- From: Andy C [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 11, 2001 3:12 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Fed up to the back teeth with tomcat !!! I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already. It keeps falling over with absolutly no error *** log messages at all. I am at my wits end, not to mention my poor users who have had to put up with this service for the past month. I am totaly lost now as to where to look for solutions So can someone please recomend a good webserver that will run .jsp and servlets pages and integrates well with a SQL server ? I used to run Java Webserver 2.0 would going back to that help ? Andy C Editor R2 Project http://www.r2-dvd.org (lets hopr you don't see a 500 internal error message.)
RE: Fed up to the back teeth with tomcat !!!
So the only success story we have is someone that reboots their server every 5-6 days anyway. Could this problem be related to the previous message sent by George? paste hi, i'm using tomcat with apache on RedHat 7.0 i'm using a WebPerformance software to test my webpage with multiple users (100 users) in the beginning it all works good but after about 15 minutes of stress test i start getting this error with tomcat . *** HANDLER THREAD PROBLEM: java.lang.NullPointerException java.lang.NullPointerException at org.apache.tomcat.service.connector.AJP12ResponseAdapter.sendStatus(Ajp12Con nectionHandler.java:439) at org.apache.tomcat.service.http.HttpResponseAdapter.endHeaders(HttpResponseAd apter.java(Compiled Code)) at org.apache.tomcat.core.BufferedServletOutputStream.sendHeaders(BufferedServl etOutputStream.java:127) at org.apache.tomcat.core.BufferedServletOutputStream.reallyFlush(BufferedServl etOutputStream.java(Compiled Code)) at org.apache.tomcat.core.ResponseImpl.finish(ResponseImpl.java(Compiled Code)) at org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection (Ajp12ConnectionHandler.java:158) at org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.java(Com piled Code)) *** Does anyone know what may have caused this error and is there anyway to fix it ? thanks Georges /paste -Original Message- From: Andy C [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 11, 2001 3:12 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Fed up to the back teeth with tomcat !!! I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already. It keeps falling over with absolutly no error *** log messages at all. I am at my wits end, not to mention my poor users who have had to put up with this service for the past month. I am totaly lost now as to where to look for solutions So can someone please recomend a good webserver that will run .jsp and servlets pages and integrates well with a SQL server ? I used to run Java Webserver 2.0 would going back to that help ? Andy C Editor R2 Project http://www.r2-dvd.org (lets hopr you don't see a 500 internal error message.)
RE: Fed up to the back teeth with tomcat !!!
Hi All, We've been running Tomcat for over 6 months on several farmed servers (linux) without any major problems. We serve out hundreds of thousands of JSPs a day and some days it crosses millions. We normally do monthly reboots of the server, but we do restart Apache every hour and only restart Tomcat when releasing new builds. I have seen the servers come to a halt, but this is usually caused by our db connections being held up. When that happens the Tomcat processes escalate 400, and then the Apache processes escalate 500. This brings the machine to its knees. Fixing db bottlenecks and taking all static content off the application servers fixed those problems. Maybe we've just been lucky... - dave At 04:12 PM 4/11/2001, Brandon Cruz wrote: So the only success story we have is someone that reboots their server every 5-6 days anyway. Could this problem be related to the previous message sent by George? paste hi, i'm using tomcat with apache on RedHat 7.0 i'm using a WebPerformance software to test my webpage with multiple users (100 users) in the beginning it all works good but after about 15 minutes of stress test i start getting this error with tomcat . *** HANDLER THREAD PROBLEM: java.lang.NullPointerException java.lang.NullPointerException at org.apache.tomcat.service.connector.AJP12ResponseAdapter.sendStatus(Ajp12Con nectionHandler.java:439) at org.apache.tomcat.service.http.HttpResponseAdapter.endHeaders(HttpResponseAd apter.java(Compiled Code)) at org.apache.tomcat.core.BufferedServletOutputStream.sendHeaders(BufferedServl etOutputStream.java:127) at org.apache.tomcat.core.BufferedServletOutputStream.reallyFlush(BufferedServl etOutputStream.java(Compiled Code)) at org.apache.tomcat.core.ResponseImpl.finish(ResponseImpl.java(Compiled Code)) at org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection (Ajp12ConnectionHandler.java:158) at org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.java(Com piled Code)) *** Does anyone know what may have caused this error and is there anyway to fix it ? thanks Georges /paste -Original Message- From: Andy C [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 11, 2001 3:12 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Fed up to the back teeth with tomcat !!! I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already. It keeps falling over with absolutly no error *** log messages at all. I am at my wits end, not to mention my poor users who have had to put up with this service for the past month. I am totaly lost now as to where to look for solutions So can someone please recomend a good webserver that will run .jsp and servlets pages and integrates well with a SQL server ? I used to run Java Webserver 2.0 would going back to that help ? Andy C Editor R2 Project http://www.r2-dvd.org (lets hopr you don't see a 500 internal error message.)
Re: Fed up to the back teeth with tomcat !!!
Since you are using SQL server, are you using ODBC? There is a bug in ODBC that stops the [web] service. It doesn't affect all installations. If this is what's happening, there is an awful work-around. Turn on ODBC tracing. It prevents the service from halting but creates a monster log file. At 08:11 PM 4/11/2001 +0100, you wrote: I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already. It keeps falling over with absolutly no error *** log messages at all. I am at my wits end, not to mention my poor users who have had to put up with this service for the past month. I am totaly lost now as to where to look for solutions So can someone please recomend a good webserver that will run .jsp and servlets pages and integrates well with a SQL server ? I used to run Java Webserver 2.0 would going back to that help ? Andy C Editor R2 Project http://www.r2-dvd.org (lets hopr you don't see a 500 internal error message.)
Re: Fed up to the back teeth with tomcat !!!
I have a success story to the contrary - using Windows NT 4, Tomcat 3.2.1, and IIS 4 we are serving a decent sized application with no problems. We've been averaging uptimes of about 5 - 6 days before the machine is restarted because of other software on the machine. No detectable resource loss, no crashes. Not to start a Windows flame war, but 5-6 days is sad. It's surely not a "solution," and we surely wouldn't call it a success. We've been running a moderate virtual domain Apache (probably with at least 50 different domain names) on JRun 2.3 (the old one) and MySQL on RedHat Linux 7.0 without problem for 101 days now (and the site has been running for about two years), with no reboots because of acting up software. Our latest development effort is using Apache 1.3.19+modssl with TC 3.2.2beta2 and Postgresql 7.1beta4 on VA Linux's RH 6.2 distribution. We expect that site to go live in May, though unfortunately it's not likely to be a high hits sort of site (it's a business site and naturally will need to ramp up customers over time). I'll try to remember to report on its success/failure. There's a low activity brochure site running now using the same basic configuration (except for TC 3.2.1), but it's only been running for 23 days. David
Re: Fed up to the back teeth with tomcat !!!
What versions of each have you been using? (apache tomcat) and what distribution and linux kernal are you running? What jvm? I would love to have the success you're having and really like tomcat when it's working for me. p.s. My jsp back into rmi services so the reason for failure isn't connected to the database or services as they both run through multiple tomcat deaths and re-starts. "David M. Rosner" wrote: Hi All, We've been running Tomcat for over 6 months on several farmed servers (linux) without any major problems. We serve out hundreds of thousands of JSPs a day and some days it crosses millions. We normally do monthly reboots of the server, but we do restart Apache every hour and only restart Tomcat when releasing new builds. I have seen the servers come to a halt, but this is usually caused by our db connections being held up. When that happens the Tomcat processes escalate 400, and then the Apache processes escalate 500. This brings the machine to its knees. Fixing db bottlenecks and taking all static content off the application servers fixed those problems. Maybe we've just been lucky... - dave At 04:12 PM 4/11/2001, Brandon Cruz wrote: So the only success story we have is someone that reboots their server every 5-6 days anyway. Could this problem be related to the previous message sent by George? paste hi, i'm using tomcat with apache on RedHat 7.0 i'm using a WebPerformance software to test my webpage with multiple users (100 users) in the beginning it all works good but after about 15 minutes of stress test i start getting this error with tomcat . *** HANDLER THREAD PROBLEM: java.lang.NullPointerException java.lang.NullPointerException at org.apache.tomcat.service.connector.AJP12ResponseAdapter.sendStatus(Ajp12Con nectionHandler.java:439) at org.apache.tomcat.service.http.HttpResponseAdapter.endHeaders(HttpResponseAd apter.java(Compiled Code)) at org.apache.tomcat.core.BufferedServletOutputStream.sendHeaders(BufferedServl etOutputStream.java:127) at org.apache.tomcat.core.BufferedServletOutputStream.reallyFlush(BufferedServl etOutputStream.java(Compiled Code)) at org.apache.tomcat.core.ResponseImpl.finish(ResponseImpl.java(Compiled Code)) at org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection (Ajp12ConnectionHandler.java:158) at org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.java(Com piled Code)) *** Does anyone know what may have caused this error and is there anyway to fix it ? thanks Georges /paste -Original Message- From: Andy C [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 11, 2001 3:12 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Fed up to the back teeth with tomcat !!! I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already. It keeps falling over with absolutly no error *** log messages at all. I am at my wits end, not to mention my poor users who have had to put up with this service for the past month. I am totaly lost now as to where to look for solutions So can someone please recomend a good webserver that will run .jsp and servlets pages and integrates well with a SQL server ? I used to run Java Webserver 2.0 would going back to that help ? Andy C Editor R2 Project http://www.r2-dvd.org (lets hopr you don't see a 500 internal error message.)
Fed up to the back teeth with tomcat !!!
I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already. It keeps falling over with absolutly no error *** log messages at all. I am at my wits end, not to mention my poor users who have had to put up with this service for the past month. I am totaly lost now as to where to look for solutions So can someone please recomend a good webserver that will run .jsp and servlets pages and integrates well with a SQL server ? I used to run Java Webserver 2.0 would going back to that help ? Andy C Editor R2 Project http://www.r2-dvd.org (lets hopr you don't see a 500 internal error message.)
Re: Fed up to the back teeth with tomcat !!!
At 01:47 PM 4/11/2001 -0700, you wrote: We've been running a moderate virtual domain Apache (probably with at least 50 different domain names) on JRun 2.3 (the old one) and MySQL on RedHat Linux 7.0 without problem for 101 days now (and the site has been running for about two years), with no reboots because of acting up software. I'm curious, what's a "moderate" virtual domain? And by domain I assume you mean a virtual host. There's no such thing as a "virtual domain".
Thanks: Re: Fed up to the back teeth with tomcat !!!
Thanks to all for the advice, I'll be running though suggestions over the next couple of days and report back. Andy C
Re: Thanks: Re: Fed up to the back teeth with tomcat !!!
Hi Andy, Did you ever post your configuration? I would be interested in what OS; Tomcat/Apache versions; JVM; DB backend and driver; whether or not you're using connection pooling and, if so, if it's a hand-rolled solution or a specific product; any settings you're passing the JVM on the command line (i.e. -mx, -ms, etc...); and anything else you can supply. I've heard good things about Resin as a servlet container, if you're looking for a commercial product -- http://www.caucho.com/ Thanks, --jeff - Original Message - From: "Andy C" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, April 11, 2001 2:22 PM Subject: Thanks: Re: Fed up to the back teeth with tomcat !!! Thanks to all for the advice, I'll be running though suggestions over the next couple of days and report back. Andy C
RE: Fed up to the back teeth with tomcat !!!
And another, we're serving up 5000 pages per day from our application (April stats), Tomcat has never crashed, and has run for well over a month without hitch (restarting Tomcat only necessary when the application gets updated). RH Linux 6, Tomcat 3.2.1, Apache 1.3.9, Sun JDK 1.2 Kevin On Wed, 11 Apr 2001, Randy Layman wrote: I have a success story to the contrary - using Windows NT 4, Tomcat 3.2.1, and IIS 4 we are serving a decent sized application with no problems. We've been averaging uptimes of about 5 - 6 days before the machine is restarted because of other software on the machine. No detectable resource loss, no crashes.
RE: Fed up to the back teeth with tomcat !!!
I have the same problem. I am running tomcat 3.2.1 on solaris without apache. There is not much of a db activity going on. To me it looks as if tomcat dies even if there is no activity or hits after a while. From the other messages , it looks like it is a bit more stable on Linux than other OSs. Srini -Original Message- From: Kevin Sangeelee [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 11, 2001 4:27 PM To: [EMAIL PROTECTED] Subject: RE: Fed up to the back teeth with tomcat !!! And another, we're serving up 5000 pages per day from our application (April stats), Tomcat has never crashed, and has run for well over a month without hitch (restarting Tomcat only necessary when the application gets updated). RH Linux 6, Tomcat 3.2.1, Apache 1.3.9, Sun JDK 1.2 Kevin On Wed, 11 Apr 2001, Randy Layman wrote: I have a success story to the contrary - using Windows NT 4, Tomcat 3.2.1, and IIS 4 we are serving a decent sized application with no problems. We've been averaging uptimes of about 5 - 6 days before the machine is restarted because of other software on the machine. No detectable resource loss, no crashes.
Re: Fed up to the back teeth with tomcat !!!
Hmm, interesting.. I did have a similar issue with an Oracle driver a while back. Yes, the Debugging helped alot. So I was driven to doing a System.gc(); after and/or before every statement... :) I think discovered this, assuming that all of that io and String creation forced a gc... and it seems to work now :):) On Wed, 11 Apr 2001, Lyle H. Ward wrote: Since you are using SQL server, are you using ODBC? There is a bug in ODBC that stops the [web] service. It doesn't affect all installations. If this is what's happening, there is an awful work-around. Turn on ODBC tracing. It prevents the service from halting but creates a monster log file. At 08:11 PM 4/11/2001 +0100, you wrote: I am fed up to the back teeth with Tomcat under Apache. I'm trying to run a 24/7 web page servinbg around 20,000 .jsp pages a day and I'v ehad to reset the damn server 3 times today already. It keeps falling over with absolutly no error *** log messages at all. I am at my wits end, not to mention my poor users who have had to put up with this service for the past month. I am totaly lost now as to where to look for solutions So can someone please recomend a good webserver that will run .jsp and servlets pages and integrates well with a SQL server ? I used to run Java Webserver 2.0 would going back to that help ? Andy C Editor R2 Project http://www.r2-dvd.org (lets hopr you don't see a 500 internal error message.)
