Login or Register to Ask a Question and Join Our Community


UNIX and Linux Applications

How to Monitor Tomcat App Server?

 
Thread Tools Search this Thread
Special Forums UNIX and Linux Applications How to Monitor Tomcat App Server?
Prev   Next
# 9  
Old 01-25-2017
it is usual problem with wrong configured java. Java runs garbage collection regularly and if it has too harsh settings for garbage collection, you will notice a small hang during the process. Check maximum and initial heap size and your garbage collection mechanism. Install some webapp - there some very nice with graphs and a lot of information - to monitor java heap. You will not see much information using standard UNIX toolset.

e.g. Understanding Java Garbage Collection | CUBRID Blog :
Quote:
there is a term that you should know before learning about GC. The term is "stop-the-world." Stop-the-world will occur no matter which GC algorithm you choose. Stop-the-world means that the JVM is stopping the application from running to execute a GC. When stop-the-world occurs, every thread except for the threads needed for the GC will stop their tasks. The interrupted tasks will resume only after the GC task has completed. GC tuning often means reducing this stop-the-world time.
 
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Building an apache-tomcat server

Hi, I have been assigned a task to build a server with these requirements : > has multiple tomcats running under the same apache. > tomcat & jdk has to be binded with apache. > latest openssl with all necesarry "mod" to bind with apache & tomcat. I am fairly new to... (1 Reply)
Discussion started by: anaigini45
1 Replies

2. UNIX for Advanced & Expert Users

Script monitor website wth default tomcat script

Hi all, on our application server we have the following script that monitor the status of the website, my problem here is that i have edite the retries from 3 to 5, and the timewait to 120 second, so the script should check 5 times every 2 minutes, and if the fifth check fails it must restart... (0 Replies)
Discussion started by: charli1
0 Replies

3. Red Hat

Configure app server to view server files

Hi, We have a OEL6.1 installed on our server. We want developers to view there application logs generated on the server, but doesn't really want to give them access to server machine. Can someone please suggest how can we configure apache/httpd to create a url which will show all files in... (1 Reply)
Discussion started by: shrshah64
1 Replies

4. Programming

Need a little help in running jsp pages(Tomcat server).

Hi, I have installed following software on my linux machine. Is there anything else required to run jsp pages on linux machine? Please Help Here are some details that might be helpful. # lsb_release -a LSB Version: ... (3 Replies)
Discussion started by: pinga123
3 Replies

5. UNIX for Dummies Questions & Answers

difference weblogic server/webserver/app server

Hi All, I am getting confused with the terms below. All I know is an application can be installed on a server. But I see the following terms used in a company. All of them are installed on same Unix box. Could you please help me out in layman terms as to what these exactly means. (PS: I don't... (1 Reply)
Discussion started by: tostay2003
1 Replies

6. Shell Programming and Scripting

Trouble getting consistent PID of tomcat server from ps

Hello all, I am working on a script to automate the process of restarting some tomcat servers. The versions of tomcat are pretty old and it often happens that they don't shut down gracefully and the PID needs to be manually killed. I am having a bear of a time getting a consistent PID from ps... (1 Reply)
Discussion started by: dkaplowitz
1 Replies

7. Solaris

what is the difference between http & Tomcat web server

I do not know the difference between the apache-http and the apche-Tomcat.Is they are differentiated on their version or on their features.:confused: (2 Replies)
Discussion started by: jayaprakash
2 Replies

8. IP Networking

can I use tomcat server for my chatting application?

Hello, I have a socket programming code to do chatting(both server and client). But this is limited to a single machines with multi users. But my target is to perform chat operation on multiple IP addresses in a given LAN in college. Can you please tell me if I can use TOMCAT as my server to... (3 Replies)
Discussion started by: nsharath
3 Replies

9. Shell Programming and Scripting

How to restart the tomcat server

hi, I need a command that restart the tomcat server. for example for restart the tomcat i am using following command, /etc/init.d/tomcat restart ..but sometimes is not working...might be i want to use java code access this peace of script. like using the grep and ps commands can i use?... (2 Replies)
Discussion started by: sankar reddy
2 Replies

10. UNIX for Dummies Questions & Answers

TomCat access in an Remote Linux Server

Hi all, I Installed Tomcat in an remote linux server (/usr/tomcat)and start service, using ./startup.sh (and tried with ./catalina.sh too). //----------------------------------------------------------------// # ./startup.sh Using CATALINA_BASE: /usr/tomcat/apache-tomcat-6.0.16/ Using... (1 Reply)
Discussion started by: gothama
1 Replies
Login or Register to Ask a Question

LEARN ABOUT DEBIAN

netsds::app::smtpd

NetSDS::App::SMTPD(3pm) 				User Contributed Perl Documentation				   NetSDS::App::SMTPD(3pm)

NAME

       NetSDS::App::SMTPD

SYNOPSIS

       use NetSDS::App::SMTPD

Packages
NetSDS::App::SMTPD::Socket
       Needs for work with socket. This module is a parent for	NetSDS::App::SMTPD and NetSDS::App::SMTPD::Client and a child of a NetSDS::APP

       ITEMS

       create_socket
	       Creating a simple socket which could be transformed into a listening in NetSDS::App::SMTPD and could be used in
	       NetSDS::App::SMTPD::Client for accept connection

       can_read
	       This method uses for making a timeout before connections to the server: if there is no connections to accept, program would be just
	       waiting in select while the connection appeared.

       close_socket
	       Close socket

NetSDS::App::SMTPD::Client
       Provides the smtp protocol bu using Net::Server::Mail::SMTP.  Had attributes: smtp - an object of Net::Server::Mail::SMTP, ip - ip of the
       remote host, headers - ref hash with headers of a message, msg - a body of a message.

       ITEMS

       set_callback and process
	       All that subs do - its only call the methods of a Net::Server::Mail::SMTP with the same name.

       get_mail
	       In this sub we parse message and set headers of the object and message body. This sub is call as a callback on event DATA

       get_header and get_msg
	       Get methods that make you access to a header of a msg and message body.	Example: $client->get_header('FROM') or
	       $client->get_header('to');

NetSDS::App::SMTPD
       This module init a smtp-server.

       ITEMS

       create_socket
	       Init a listening socket by creating a simple socket Super::create_socket and make it listening.

       data    Takes - a message that has been received, parses them and prepare the structure of headers, body for next actions

       accept  Waiting for an smtp connection and that accept it.

       data
       process

Example
	       #!/usr/bin/env perl

	       use strict;
	       use warnings;

	       Receiver->run(
		       infinite  => 1,
		       debug	 => 1,
		       verbose	 => 1,
		       conf_file => '../conf/mts-receiver.conf',
	       );

	       1;

	       package Receiver;
	       use base 'NetSDS::App::SMTPD';

	       sub process {
		       my $self = shift;
		       my $client = $self->SUPER::process;

		       #do something with msg;
		       my $from = $client->get_header('from');
		       my $msg = $client->get_msg;

		       .....

		       return $self;
	       };

       or you could reinit process like this:

	       sub process {
		       my $self = shift;
		       my $client = $self->accept;

		       return unless $client;
		       $client->process;

		       #do something
		       ......
		       $client->close;
		       return $self;
	       };

AUTHOR

       Yana Kornienko <yana@netstyle.com.ua>

perl v5.10.1							    2010-04-28						   NetSDS::App::SMTPD(3pm)