Singleton memory leak after redeploying.
Hi to everyone!! This is my first email to this list, hope is the correct
one.
I've been analyzing my code with a profiler (JProbe) because I was getting
an
OutOfMemoryException after a few redeploys of my application.
After some tests, it turned out that my static fields were not GCed after
redeploying, getting stuck with the classloader which loaded my classes.
After that, I searched the bugzilla and found
*Bug# *(Memory Leak in Classloader/Manager deploy/undeploy)*:*
20758http://issues.apache.org/bugzilla/show_bug.cgi?id=20758
where it says that the bug has been FIXED.
I tested it in Tomcat 4.1.24 and 5.0.28 getting the same result (memory leak
in static fields).
I attach here the servlet and singleton of my simple test webapp.
---
public class Test extends HttpServlet
{
MySingleton singleton = MySingleton.getInstance();
public void init(ServletConfig config) throws ServletException
{
super.init(config);
}
public void destroy()
{
singleton = null;
}
protected void processRequest(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
response.setContentType(text/html);
PrintWriter out = response.getWriter();
out.println(htmlheadtitleJProbe TEST
singleton/title/headbodybJProbe TEST
singleton/bBR/body/html);
out.close();
}
protected void doGet(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, IOException
{
processRequest(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, IOException
{
processRequest(request, response);
}
}
-
public class MySingleton
{
private static MySingleton _instance = new MySingleton();
public byte[] _charWidths = new byte[1024*1024]; // 1Meg mem
allocation!!.
private MySingleton()
{}
public static MySingleton getInstance()
{
return _instance;
}
public void finalize()
{
System.out.println(!!! END-MySingleton !!!);
_instance = null;
}
}
-
After redeploying this simple webapp a 1Meg leak can be found due to
MySingleton not being GCed.
Please I want to know If I'm leaving out something, the bug is not really
fixed or I need to take another approach.
Thanks.
Juan F. S. (Spain).
How to set the admin console for 5.5.x
Hi All, I am having trouble setting up the admin console for Apache Tomcat/5.5.12. I have downloaded the apache-tomcat-5.5.12-admin.zip file from Tomcat site. Unzipped it and placed the admin folder under C:\Tomcat55\server\webapps folder. When I try the below page: http://localhost/admin/ I get the admin log in page. I enter admin and admin as username/password as defined in tomcat-users.xml file. Next page displays: Tomcat's administration web application is no longer installed by default. Download and install the admin package to use it. Any hepl is greatly appreciated. Thank you. Regards, Shridhar
heap size problems (speed)
Hello, I have an instance of tomcat with APR support which is set to allocate more heap memory than default (by passing -Xmx512M option to JAVA_OPTS in catalina.sh). Under this instance runs a test application which gets data from a database and makes a cache with the fetched data (around 350M). When the app is accessed it is supposed to return data from the cache (which is in a form of a hashmap) faster than getting it from the database. After the caching is done the application responds extremely slow and above this many images aren't loaded or they are loaded partially in the browser (I haven't checked to see if the images are the only ones that are not loaded). The system: = Kernel: Linux server2 2.6.14-1.1637_FC4 #1 Wed Nov 9 18:19:37 EST 2005 i686 athlon i386 GNU/Linux = Processor: AMD Duron 1000MHz = Tomcat: 5.5.12 with APR 1.2.2 (compiled apart from apr-0.9.6-3.1 which is in the distrib) = RAM: 1G The system has all updates. I am not the one who wants the test so don't blame me for any stupidity that you might found in this scenario :). I get the same results on a different machine which is much faster and has twice as much memory than this one from the test. Thanks, Cristian - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Which ISAPI Filter?
Hello I have been asked to migrate a Java Web application to a Windows 2003 Server machine, running IIS 6. The application has been running fine on Windows 2000 for about 18 months, with Tomcat 4.1 and with isapi_redirect.dll up and running on IIS 5. I decided not to upgrade to Tomcat 5, but see if I could get it all running with Tomcat 4.1 and the same isapi filter, isapi_redirect.dll. Although it looks like IIS 6 is picking the filter up (I have a green arrow in IIS 6) the application start page is not being found when I try to access it through post 80. I can find it if I go to Tomcat direct (8080). Can anyone tell me if they have installed Tomcat 4.1 onto Windows 2003, with IIS 6 and if so, do I need to install Isapi_redirect2.dll rather than Isapi_redirect.dll? If I do need Isapi_redirect2.dll does anyone have the download page URL? I can't seem to find it on the Jakarta Apache site! Any tips gratefully received. Many thanks Sue Roe ***Disclaimer*** The contents of this Email may be privileged and are confidential. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. Should you wish to use Email as a mode of communication, CMi plc and its subsidiaries are unable to guarantee the security of Email content outside of our own computer systems. This footnote also confirms that this Email message has been checked by MIMESweeper for the presence of computer viruses. Whilst we run anti-virus software, you are solely responsible for ensuring that any Email or attachment you receive is virus free. We disclaim any liability for any damage you suffer as a consequence of receiving any virus. Checkmate International plc (CMi) Registered in England No: 1899857 Registered Office 4th Floor, 35 New Bridge Street, London, EC4V 6BW - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
heap size problems (speed) [2]
Although it may seem obvious what is the problem, I forgot to ask the question so I'm doing it now: What could be the problem in the below described situation ? I would appreciate if you point some docs that I should read to solve the issue. Thanks again, Cristian Original message follows: Hello, I have an instance of tomcat with APR support which is set to allocate more heap memory than default (by passing -Xmx512M option to JAVA_OPTS in catalina.sh). Under this instance runs a test application which gets data from a database and makes a cache with the fetched data (around 350M). When the app is accessed it is supposed to return data from the cache (which is in a form of a hashmap) faster than getting it from the database. After the caching is done the application responds extremely slow and above this many images aren't loaded or they are loaded partially in the browser (I haven't checked to see if the images are the only ones that are not loaded). The system: = Kernel: Linux server2 2.6.14-1.1637_FC4 #1 Wed Nov 9 18:19:37 EST 2005 i686 athlon i386 GNU/Linux = Processor: AMD Duron 1000MHz = Tomcat: 5.5.12 with APR 1.2.2 (compiled apart from apr-0.9.6-3.1 which is in the distrib) = RAM: 1G The system has all updates. I am not the one who wants the test so don't blame me for any stupidity that you might found in this scenario :). I get the same results on a different machine which is much faster and has twice as much memory than this one from the test. Thanks, Cristian - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to set the admin console for 5.5.x
Hi Richard, Firstly, thanks for the reply. I have placed it under: $CATALINA_HOME/server/webapps folder as indicated. I get the login page for admin console, but after that I am getting the error message. Further help is appreciated. Thank you. Regards, Shridhar On 11/28/05, Richard Mixon [EMAIL PROTECTED] wrote: Shridhar, You have placed it in the wrong directory structure. Look at the paths in the zip/tar file - they show you the correct location. It is mostly under server/webapps - not webapps. HTH - Richard -Original Message- From: N S, Shridhar [mailto:[EMAIL PROTECTED] Sent: Monday, November 28, 2005 2:49 AM To: users@tomcat.apache.org Subject: How to set the admin console for 5.5.x Hi All, I am having trouble setting up the admin console for Apache Tomcat/5.5.12. I have downloaded the apache-tomcat-5.5.12-admin.zip file from Tomcat site. Unzipped it and placed the admin folder under C:\Tomcat55\server\webapps folder. When I try the below page: http://localhost/admin/ I get the admin log in page. I enter admin and admin as username/password as defined in tomcat-users.xml file. Next page displays: Tomcat's administration web application is no longer installed by default. Download and install the admin package to use it. Any hepl is greatly appreciated. Thank you. Regards, Shridhar - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat stops responding
That's an awful lot of processes. Quite possibly a problem with the driver you are using ... It's not very well rated. If you want some advice, try using a non-DBCP pool (C3P0) sourceforge.net/projects/c3p0, and also the best SQL Server driver out there which is at jtds.sourceforge.net. Add both c3p0 and jtds jars to your common/lib and redefine your Resource as follows; Resource name=jdbc/dbase auth=Container driverClass=net.sourceforge.jtds.jdbc.Driver minPoolSize=25 maxPoolSize=50 acquireIncrement=1 user=sa password=Abuja5^ factory=org.apache.naming.factory.BeanFactory type=com.mchange.v2.c3p0.ComboPooledDataSource jdbcUrl=jdbc:jtds:sqlserver://localhost:1433/dbase / Restart SQL Server and Tomcat and see how you get on. Allistair. -Original Message- From: Kamalmeet Singh [mailto:[EMAIL PROTECTED] Sent: 28 November 2005 12:12 To: Tomcat Users List Subject: Tomcat stops responding Hi, I am facing a problem with tomcat 5.5. After working smoothly for sometime(3-4 days), the server stopped working and resumed only after a Tomcat restart. It stopped connecting to database. The same behavior was observed twice. The exception thrown was: java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Error establishing socket. at com.microsoft.jdbc.base.BaseExceptions.createException(Unknown Source) at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source) at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source) at com.microsoft.jdbc.sqlserver.tds.TDSConnection.init(Unknown Source) at com.microsoft.jdbc.sqlserver.SQLServerImplConnection.open(Unknown Source) at com.microsoft.jdbc.base.BaseConnection.getNewImplConnection(Unknown Source) at com.microsoft.jdbc.base.BaseConnection.open(Unknown Source) at com.microsoft.jdbc.base.BaseDriver.connect(Unknown Source) at org.apache.tomcat.dbcp.dbcp.DriverConnectionFactory.createConnection(Dri verConnectionFactory.java:37) at org.apache.tomcat.dbcp.dbcp.PoolableConnectionFactory.makeObject(Poolabl eConnectionFactory.java:290) at org.apache.tomcat.dbcp.pool.impl.GenericObjectPool.borrowObject(GenericO bjectPool.java:771) at org.apache.tomcat.dbcp.dbcp.AbandonedObjectPool.borrowObject(AbandonedOb jectPool.java:74) at org.apache.tomcat.dbcp.dbcp.PoolingDataSource.getConnection(PoolingDataS ource.java:95) I am using settings in my ROOT.xml Resource name=jdbc/dbase auth=Container type=javax.sql.DataSource username=user password=pass driverClassName=com.microsoft.jdbc.sqlserver.SQLServerDriver url=jdbc:microsoft:sqlserver://localhost:1433;databaseName=dbase maxActive=5000 maxIdle=1 maxWait=100 removeAbandoned=true removeAbandonedTimeout=2/ Additional info: In both cases the common thing was, that in SQL server under management/process info I could see more than 3500 processes connected to the database from tomcat, but in sleeping mode. (not sure this has anything to do with problem). also, I am using Tomcat as Apache module using mod_jk I cannot make out anything of this, why suddenly server stops connecting to database. Any ideas about the problem? Regards Kamal FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLUE --- QAS Ltd. Registered in England: No 2582055 Registered in Australia: No 082 851 474 --- /FONT FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLACK Disclaimer: The information contained within this e-mail is confidential and may be privileged. This email is intended solely for the named recipient only; if you are not authorised you must not disclose, copy, distribute, or retain this message or any part of it. If you have received this message in error please contact the sender at once so that we may take the appropriate action and avoid troubling you further. Any views expressed in this message are those of the individual sender. QAS Limited has the right lawfully to record, monitor and inspect messages between its employees and any third party. Your messages shall be subject to such lawful supervision as QAS Limited deems to be necessary in order to protect its information, its interests and its reputation. Whilst all efforts are made to safeguard Inbound and Outbound emails, QAS Limited cannot guarantee that attachments are virus free or compatible with your systems and does not accept any liability in respect of viruses or computer problems experienced. /FONT - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
css and images (stupid question?)
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi all; playing around with tomcat in order to both learn using the package and create a small web site there, I'm currently left with a problem which, though probably being small (and not really related to tomcat), keeps bugging me: I'm trying to do the visual stuff of my jsp using a css style file, which is good, so far. Within the css file, I'm using images for backgrounds etc like that: background: #fff url(/images/bg_header_blau.jpg) no-repeat top left; My problem, right now, is where to put the images within the web application so they're actually found when displaying the page. Initially, I created a folder images within my web application and referred to the images using url(images/...) with relative path names, which didn't work. Also tried to place the images folder inside $CATALINA_HOME/webapps and then using absolute image urls (/image/...), which also didn't work. So, where's the magic? I've always been through some tougher moments with css and images while dynamically generating content, but right now I feel really helpless about that. Can someone enlighten me? Cheers and thanks, Kris - -- Kristian Rink * http://zimmer428.net * jab: [EMAIL PROTECTED] icq: 48874445 * fon: ++49 176 2447 2771 Be yourself the kind of change you want to see in this world. (Gandhi) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFDive4cxBAPOA1m6wRAnRxAJ90PaDKZsQQDo3M4CCd7WV5Syi/MgCdGhbs hobJ1TqkErAqjLxZc6gV0kM= =O7hF -END PGP SIGNATURE- - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: css and images (stupid question?)
Your URLs if absolute would need to contain the web application name unless your web appliation was the ROOT web application (the only one that runs at /). Therefore if you webapp was called apple and was in webapps/apple, your image refs would need to be /apple/images/ You can use relative image URLs in your CSS OK BUT if you are linking to a CSS sheet, again youd need the href to point to /apple/css/mycss.css. Other than that, you can define your CSS styles in the head of your pages and then use relative refs to your images, e.e ../images/ Allistair -Original Message- From: Kristian Rink [mailto:[EMAIL PROTECTED] Sent: 28 November 2005 12:28 To: Tomcat Users List Subject: css and images (stupid question?) FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLUE --- QAS Ltd. Registered in England: No 2582055 Registered in Australia: No 082 851 474 --- /FONT FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLACK Disclaimer: The information contained within this e-mail is confidential and may be privileged. This email is intended solely for the named recipient only; if you are not authorised you must not disclose, copy, distribute, or retain this message or any part of it. If you have received this message in error please contact the sender at once so that we may take the appropriate action and avoid troubling you further. Any views expressed in this message are those of the individual sender. QAS Limited has the right lawfully to record, monitor and inspect messages between its employees and any third party. Your messages shall be subject to such lawful supervision as QAS Limited deems to be necessary in order to protect its information, its interests and its reputation. Whilst all efforts are made to safeguard Inbound and Outbound emails, QAS Limited cannot guarantee that attachments are virus free or compatible with your systems and does not accept any liability in respect of viruses or computer problems experienced. /FONT -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi all; playing around with tomcat in order to both learn using the package and create a small web site there, I'm currently left with a problem which, though probably being small (and not really related to tomcat), keeps bugging me: I'm trying to do the visual stuff of my jsp using a css style file, which is good, so far. Within the css file, I'm using images for backgrounds etc like that: background: #fff url(/images/bg_header_blau.jpg) no-repeat top left; My problem, right now, is where to put the images within the web application so they're actually found when displaying the page. Initially, I created a folder images within my web application and referred to the images using url(images/...) with relative path names, which didn't work. Also tried to place the images folder inside $CATALINA_HOME/webapps and then using absolute image urls (/image/...), which also didn't work. So, where's the magic? I've always been through some tougher moments with css and images while dynamically generating content, but right now I feel really helpless about that. Can someone enlighten me? Cheers and thanks, Kris - -- Kristian Rink * http://zimmer428.net * jab: [EMAIL PROTECTED] icq: 48874445 * fon: ++49 176 2447 2771 Be yourself the kind of change you want to see in this world. (Gandhi) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFDive4cxBAPOA1m6wRAnRxAJ90PaDKZsQQDo3M4CCd7WV5Syi/MgCdGhbs hobJ1TqkErAqjLxZc6gV0kM= =O7hF -END PGP SIGNATURE- - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLUE --- QAS Ltd. Registered in England: No 2582055 Registered in Australia: No 082 851 474 --- /FONT FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLACK Disclaimer: The information contained within this e-mail is confidential and may be privileged. This email is intended solely for the named recipient only; if you are not authorised you must not disclose, copy, distribute, or retain this message or any part of it. If you have received this message in error please contact the sender at once so that we may take the appropriate action and avoid troubling you further. Any views expressed in this message are those of the individual sender. QAS Limited has the right lawfully to record, monitor and inspect messages between its employees and any third party. Your messages shall be subject to such lawful supervision as QAS Limited deems to be necessary in order to protect its information, its interests and its reputation. Whilst all efforts are made to safeguard Inbound and Outbound
RE: css and images (stupid question?)
Oh you can use aliases too if fronted with an apache web server -Original Message- From: Allistair Crossley [mailto:[EMAIL PROTECTED] Sent: 28 November 2005 12:33 To: Tomcat Users List Subject: RE: css and images (stupid question?) Your URLs if absolute would need to contain the web application name unless your web appliation was the ROOT web application (the only one that runs at /). Therefore if you webapp was called apple and was in webapps/apple, your image refs would need to be /apple/images/ You can use relative image URLs in your CSS OK BUT if you are linking to a CSS sheet, again youd need the href to point to /apple/css/mycss.css. Other than that, you can define your CSS styles in the head of your pages and then use relative refs to your images, e.e ../images/ Allistair -Original Message- From: Kristian Rink [mailto:[EMAIL PROTECTED] Sent: 28 November 2005 12:28 To: Tomcat Users List Subject: css and images (stupid question?) FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLUE --- QAS Ltd. Registered in England: No 2582055 Registered in Australia: No 082 851 474 --- /FONT FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLACK Disclaimer: The information contained within this e-mail is confidential and may be privileged. This email is intended solely for the named recipient only; if you are not authorised you must not disclose, copy, distribute, or retain this message or any part of it. If you have received this message in error please contact the sender at once so that we may take the appropriate action and avoid troubling you further. Any views expressed in this message are those of the individual sender. QAS Limited has the right lawfully to record, monitor and inspect messages between its employees and any third party. Your messages shall be subject to such lawful supervision as QAS Limited deems to be necessary in order to protect its information, its interests and its reputation. Whilst all efforts are made to safeguard Inbound and Outbound emails, QAS Limited cannot guarantee that attachments are virus free or compatible with your systems and does not accept any liability in respect of viruses or computer problems experienced. /FONT -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi all; playing around with tomcat in order to both learn using the package and create a small web site there, I'm currently left with a problem which, though probably being small (and not really related to tomcat), keeps bugging me: I'm trying to do the visual stuff of my jsp using a css style file, which is good, so far. Within the css file, I'm using images for backgrounds etc like that: background: #fff url(/images/bg_header_blau.jpg) no-repeat top left; My problem, right now, is where to put the images within the web application so they're actually found when displaying the page. Initially, I created a folder images within my web application and referred to the images using url(images/...) with relative path names, which didn't work. Also tried to place the images folder inside $CATALINA_HOME/webapps and then using absolute image urls (/image/...), which also didn't work. So, where's the magic? I've always been through some tougher moments with css and images while dynamically generating content, but right now I feel really helpless about that. Can someone enlighten me? Cheers and thanks, Kris - -- Kristian Rink * http://zimmer428.net * jab: [EMAIL PROTECTED] icq: 48874445 * fon: ++49 176 2447 2771 Be yourself the kind of change you want to see in this world. (Gandhi) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFDive4cxBAPOA1m6wRAnRxAJ90PaDKZsQQDo3M4CCd7WV5Syi/MgCdGhbs hobJ1TqkErAqjLxZc6gV0kM= =O7hF -END PGP SIGNATURE- - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLUE --- QAS Ltd. Registered in England: No 2582055 Registered in Australia: No 082 851 474 --- /FONT FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLACK Disclaimer: The information contained within this e-mail is confidential and may be privileged. This email is intended solely for the named recipient only; if you are not authorised you must not disclose, copy, distribute, or retain this message or any part of it. If you have received this message in error please contact the sender at once so that we may take the appropriate action and avoid troubling you further. Any views expressed in this message are those of the individual sender. QAS Limited has the right lawfully to record, monitor and inspect messages between its employees and any third party. Your messages
Re: How to set the admin console for 5.5.x
Hi Shridhar, Tomcat Admin (for 5.5) zip or rar.gz file has following two main contents: admin.xml admin (webapps) You have to put admin.xml inside $CATALINA_HOME/conf/Catalina/localhost and admin (webapps) inside $CATALINA_HOME/server/webapps . Also make sure that (which you already did but one more time) that there is a user in tomcat-users.xml which has admin role. Put everything in proper places and restart the tomcat. You will see results. Hope it helps. Regards, D --- N S, Shridhar [EMAIL PROTECTED] wrote: Hi Richard, Firstly, thanks for the reply. I have placed it under: $CATALINA_HOME/server/webapps folder as indicated. I get the login page for admin console, but after that I am getting the error message. Further help is appreciated. Thank you. Regards, Shridhar On 11/28/05, Richard Mixon [EMAIL PROTECTED] wrote: Shridhar, You have placed it in the wrong directory structure. Look at the paths in the zip/tar file - they show you the correct location. It is mostly under server/webapps - not webapps. HTH - Richard -Original Message- From: N S, Shridhar [mailto:[EMAIL PROTECTED] Sent: Monday, November 28, 2005 2:49 AM To: users@tomcat.apache.org Subject: How to set the admin console for 5.5.x Hi All, I am having trouble setting up the admin console for Apache Tomcat/5.5.12. I have downloaded the apache-tomcat-5.5.12-admin.zip file from Tomcat site. Unzipped it and placed the admin folder under C:\Tomcat55\server\webapps folder. When I try the below page: http://localhost/admin/ I get the admin log in page. I enter admin and admin as username/password as defined in tomcat-users.xml file. Next page displays: Tomcat's administration web application is no longer installed by default. Download and install the admin package to use it. Any hepl is greatly appreciated. Thank you. Regards, Shridhar - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Yahoo! Music Unlimited Access over 1 million songs. Try it free. http://music.yahoo.com/unlimited/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: css and images (stupid question?)
Kristian Rink wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hi all;
playing around with tomcat in order to both learn using the package and
create a small web site there, I'm currently left with a problem which,
though probably being small (and not really related to tomcat), keeps
bugging me:
I'm trying to do the visual stuff of my jsp using a css style file,
which is good, so far. Within the css file, I'm using images for
backgrounds etc like that:
background: #fff url(/images/bg_header_blau.jpg) no-repeat top left;
My problem, right now, is where to put the images within the web
application so they're actually found when displaying the page.
Initially, I created a folder images within my web application and
referred to the images using url(images/...) with relative path names,
which didn't work. Also tried to place the images folder inside
$CATALINA_HOME/webapps and then using absolute image urls (/image/...),
which also didn't work.
So, where's the magic? I've always been through some tougher moments
with css and images while dynamically generating content, but right now
I feel really helpless about that. Can someone enlighten me?
Well, your basic problem is that relative paths will not work, since
pages can be in different directories. Absolute path has one problem,
your application can be deployed under different paths. That problem is
easy to solve, HttpServletRequest.getContextPath() will give you the
deployment path. Just paste it on your desired CSS location, like this:
css.jsp
---
...
background: #fff url(%= request.getContextPath() %/images/bg_header_blau.jpg)
no-repeat top left;
or, if you're using JSP 2.0
background: #fff url(${request.contextPath}/images/bg_header_blau.jpg)
no-repeat top left;
...
---
Nix.
-
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RE: How to set the admin console for 5.5.x
From: Richard Mixon [mailto:[EMAIL PROTECTED] Subject: RE: How to set the admin console for 5.5.x You have placed it in the wrong directory structure. It is mostly under server/webapps - not webapps. -Original Message- From: N S, Shridhar [mailto:[EMAIL PROTECTED] Subject: How to set the admin console for 5.5.x Unzipped it and placed the admin folder under C:\Tomcat55\server\webapps folder. Richard, please read the original message a bit more carefully - the OP had placed it exactly where you told him to. For Shreedhar: Did you restart Tomcat after updating tomcat-users.xml? Does your admin userid include a role attribute of admin? If both of those check out, please send your tomcat-users.xml file to the list (mask the passwords, if that's important). - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: How to set the admin console for 5.5.x
Charles, thanks for pointing that out - its what I get for trying to help at 3:40am. I read too quickly and assumed it was the usual problem with admin. - Richard -Original Message- From: Caldarale, Charles R [mailto:[EMAIL PROTECTED] Sent: Monday, November 28, 2005 8:02 AM To: Tomcat Users List Subject: RE: How to set the admin console for 5.5.x From: Richard Mixon [mailto:[EMAIL PROTECTED] Subject: RE: How to set the admin console for 5.5.x You have placed it in the wrong directory structure. It is mostly under server/webapps - not webapps. -Original Message- From: N S, Shridhar [mailto:[EMAIL PROTECTED] Subject: How to set the admin console for 5.5.x Unzipped it and placed the admin folder under C:\Tomcat55\server\webapps folder. Richard, please read the original message a bit more carefully - the OP had placed it exactly where you told him to. ... - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: JDBC Resource Configuration
Good Morning Martin- If I understand your question correctly take a look at JSR-000221 https://jsecom16k.sun.com/ECom/EComActionServlet/DownloadPage:~:com.sun.sunit.sdlc.content.DownloadPageInfo;jsessionid=DDCBE747E2BD2C40EC2CC94C8DDB5F84;jsessionid=DDCBE747E2BD2C40EC2CC94C8DDB5F84 and look at the auth-mechanism provided from resource adapter deployment descriptor (jdbc provider) websphere handles this situation and has some information that will help you http://www-306.ibm.com/software/webservers/appserv/doc/v40/ae/infocenter/was/06061400.html HTH, Martin- - Original Message - From: Martin Dubuc [EMAIL PROTECTED] To: users@tomcat.apache.org Sent: Monday, November 28, 2005 9:51 AM Subject: JDBC Resource Configuration I am defining a number of JNDI resources in the server.xml file in the GlobalNamingResources section. As part of defining JDBC resources in this section, the username and password attributes are specified. The password is specified as clear text. I am wondering if there are ways to encrypt the passwords used for the JDBC resources or if it is possible not to define at all, but provide it in the Java sources instead. Martin __ Yahoo! Music Unlimited Access over 1 million songs. Try it free. http://music.yahoo.com/unlimited/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: reading file in ServletContextListener
whoops. I meant to say / is the root of the filesystem and _not_ having a slash would mean the current directory, so that would be where tomcat has been started from. And you want neither of those. -Original Message- From: GB Developer [mailto:[EMAIL PROTECTED] Sent: Monday, November 28, 2005 11:28 AM To: 'Tomcat Users List' Subject: RE: reading file in ServletContextListener would work, but where / is (without the getRealPath part) is the directory from which Tomcat is being started, and who knows (or should have to care) where that is. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Singleton memory leak after redeploying.
Hi Juan,
I think your problem can't be solved (only) by Tomcat.
The problem is that objets stay in memory because of pointers on static
references...
To solve this :
You can embed a CleanupListener in your webapp.
This listener seem to be like this :
package com.yourWebApp;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
public class CleanupListener implements ServletContextListener
{
public MyCleanupListener() { super(); }
public void contextInitialized(ServletContextEvent event) { }
public void contextDestroyed(ServletContextEvent event) {
MySingleton.delInstance();
}
}
---
Before this, you have to
1) modify your MySingleton with :
public static void delInstance()
{
if (_instance != null) { _instance._charWidths=null; }
_instance = null;
}
2) add, in web.xml :
listener
listener-classcom.yourWebApp.CleanupListener/listener-class
/listener
Notes :
- Perhaps your Listener will have to delete other objets like SQL drivers,
commons logger, ...
- see also :
http://opensource2.atlassian.com/confluence/spring/pages/viewpage.action?pageId=2669
Regards.
On Mon, 28 Nov 2005 08:29:13 +
kurrele [EMAIL PROTECTED] wrote:
Hi to everyone!! This is my first email to this list, hope is the correct
one.
I've been analyzing my code with a profiler (JProbe) because I was getting
an
OutOfMemoryException after a few redeploys of my application.
After some tests, it turned out that my static fields were not GCed after
redeploying, getting stuck with the classloader which loaded my classes.
After that, I searched the bugzilla and found
*Bug# *(Memory Leak in Classloader/Manager deploy/undeploy)*:*
20758http://issues.apache.org/bugzilla/show_bug.cgi?id=20758
where it says that the bug has been FIXED.
I tested it in Tomcat 4.1.24 and 5.0.28 getting the same result (memory leak
in static fields).
I attach here the servlet and singleton of my simple test webapp.
---
public class Test extends HttpServlet
{
MySingleton singleton = MySingleton.getInstance();
public void init(ServletConfig config) throws ServletException
{
super.init(config);
}
public void destroy()
{
singleton = null;
}
protected void processRequest(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
response.setContentType(text/html);
PrintWriter out = response.getWriter();
out.println(htmlheadtitleJProbe TEST
singleton/title/headbodybJProbe TEST
singleton/bBR/body/html);
out.close();
}
protected void doGet(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, IOException
{
processRequest(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, IOException
{
processRequest(request, response);
}
}
-
public class MySingleton
{
private static MySingleton _instance = new MySingleton();
public byte[] _charWidths = new byte[1024*1024]; // 1Meg mem
allocation!!.
private MySingleton()
{}
public static MySingleton getInstance()
{
return _instance;
}
public void finalize()
{
System.out.println(!!! END-MySingleton !!!);
_instance = null;
}
}
-
After redeploying this simple webapp a 1Meg leak can be found due to
MySingleton not being GCed.
Please I want to know If I'm leaving out something, the bug is not really
fixed or I need to take another approach.
Thanks.
Juan F. S. (Spain).
-
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Monitoring Tomcat conenction pool
Is there any tool available to monitor the database connection pools on a Tomcat server. I would like to be able to determine which connections are in use at any time. Thanks - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Java databases as alternative to MySQL on OS X Server? (OT)
Given the sad, sad performance findings at: No More Apple Mysteries, Part Two Date: September 1st, 2005 http://www.anandtech.com/mac/showdoc.aspx?i=2520 are there any javabased DB alternatives, that may perform better than MySQL (or PostgreSQL for that matter)? I prefer free, open sourced DBs or otherwise with a license that could fit a small business/non profit organisation. I don't enough of JVMs to know if Javabased DBs are usually better performancewise than MySQL/PostgreSQL, but my thought was that if everything is kept within the JVM, the weak performance spots in OS X would be minimized as threads would be handled within JVM rather than within OS X. Threads being being the prime suspect in the weak MySQL performance in OS X according Anandtech. Do you have any thought and/or suggestions on this issue? Experiences you could share? My server runs Mac OS X Server 10.2.6 with Java 1.4.1/1.3.1. I can't use Java 1.5 just yet. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
SSL login page question
Hi, I have a form based login page and I want to make sure that HTTPS is always used when logging in. But the catch is that the URL the user is trying to go to may not be using HTTPS but HTTP. We just want to make sure that the user logs into the web app using SSL always. The security constraint for the login page is CONFIDENTIAL. Is there any way to ensure that the user logs in using SSL even though the URL they want to go to uses HTTP? Thanks in advance I'd appreciate any help, Paulo Example: User wants to go to http://someHostName/index.jsp The login page comes up. The user logs in and goes to the URL listed above. I need to make sure that the login name and password are encrypted when they submit the login data.
Re: heap size problems (speed) [2]
- Original Message - From: Duan, Nick [EMAIL PROTECTED] To: Tomcat Users List users@tomcat.apache.org Sent: Monday, November 28, 2005 7:30 PM Subject: RE: heap size problems (speed) [2] Were you using the right JVM? There were two JDK download for LINUX on Sun's web site. I have downloaded : J2SE(TM) Development Kit 5.0 Update 5 Linux self extracting file (although I think I should have get the rpm). I've extrated it in a separate directory and set JAVA_HOME in tomcat to point to that dir. Does it make any difference other than the fact that this way it is not rpm compliant? The main problem may be your AMD Duron processor which has a very small cache size (I believe it's about 512K). Once the processor cache reaches its limit, increasing the JVM heap size won't be very effective. This is even worse for my AMD Duron cache size : 64 KB but on the other machine I have : cache size : 1024 KB and still get the same results. Cristian - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Java databases as alternative to MySQL on OS X Server? (OT)
On Monday, 28 בNovember 2005 19:59, Mieke Banderas wrote: are there any javabased DB alternatives, that may perform better than MySQL (or PostgreSQL for that matter)? I prefer free, open sourced DBs or otherwise with a license that could fit a small business/non profit organisation. HSQLdb (formerly known as Hypersonic SQL) and Apache Derbi (formerly knows as cloudscape DB) are two Pure Java databases, which are free and open source, and at least the first can run in memory in the JVM. As for faster performing ? I think you'd be hard pressed to find something better performing then MySQL and Postgres. Might want to try firebird, though I wouldn't get your hopes up. I don't enough of JVMs to know if Javabased DBs are usually better performancewise than MySQL/PostgreSQL, I can't really see how it could be, and my experience indeed shows the opposite. but my thought was that if everything is kept within the JVM, the weak performance spots in OS X would be minimized as threads would be handled within JVM rather than within OS X. Threads being being the prime suspect in the weak MySQL performance in OS X according Anandtech. I'm not sure why do they think that, and I haven't read the entire article yet, but I doubt you'd get better performance from an internal DB then from a standalone highly optimized full RDBMs. -- Oded Arbel m-Wise mobile solutions [EMAIL PROTECTED] +972-9-9611212 (204) +972-54-7340014 ::.. The marvels of today's modern technology include the development of a soda can, when discarded will last forever ... and a $7,000 car which when properly cared for will rust out in two or three years. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: heap size problems (speed) [2]
--- Cristian [EMAIL PROTECTED] wrote: - Original Message - From: Duan, Nick [EMAIL PROTECTED] To: Tomcat Users List users@tomcat.apache.org Sent: Monday, November 28, 2005 7:30 PM Subject: RE: heap size problems (speed) [2] Were you using the right JVM? There were two JDK download for LINUX on Sun's web site. I have downloaded : J2SE(TM) Development Kit 5.0 Update 5 Linux self extracting file (although I think I should have get the rpm). I've extrated it in a separate directory and set JAVA_HOME in tomcat to point to that dir. Does it make any difference other than the fact that this way it is not rpm compliant? The main problem may be your AMD Duron processor which has a very small cache size (I believe it's about 512K). Once the processor cache reaches its limit, increasing the JVM heap size won't be very effective. This is even worse for my AMD Duron cache size : 64 KB but on the other machine I have : cache size : 1024 KB and still get the same results. Cristian - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] I don't think your CPU L caches are going to influence the issues you are seeing...not noticeably..not with todays hardware. Cristian is resizing the java heap to allow it to get larger than it was able before (default or the Tomcat default setting). In this case heap being the amount of memory the java process is going to be able to use for the process aside from the static space which can not be controlled by the heap setting being used. How much memory does your computer physically have Cristian? Are you also using -Xms512m? I'll wait to here about your memory first before making other comments on that. The next thing I'm going to ask deals with another issue we had on the list. Do you also write to the HashMap from your application? Are you reading and writing to this cache or your application loads this cached data at start up and it is merely read from that point on? If you are writing to this data you need to be sure to synchronize the HashMap because if you don't you can get into some serious problems with concurrency issues and HashMap resizing (synchronize reads and writes). If you load all of the data up then only read from the application then synchronizing the reads to the hash map won't matter (unless you allow reading while the loading is occuring). The next question would be: Even if only reading and you are are currently synchronizing the calls to this cached data are the operations long? If the operations to a synchronized resource are very long then other threads (requests in this case) will be delayed while trying to access the HashMap. Wade - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: heap size problems (speed) [2]
I don't think your CPU L caches are going to influence the issues you are seeing...not noticeably..not with todays hardware. Cristian is resizing the java heap to allow it to get larger than it was able before (default or the Tomcat default setting). In this case heap being the amount of memory the java process is going to be able to use for the process aside from the static space which can not be controlled by the heap setting being used. How much memory does your computer physically have Cristian? Are you also using -Xms512m? I'll wait to here about your memory first before making other comments on that. 1G of RAM and I do not set -Xms512m swap space is hit ocasionaly but not all the time. The next thing I'm going to ask deals with another issue we had on the list. Do you also write to the HashMap from your application? Are you reading and writing to this cache or your application loads this cached data at start up and it is merely read from that point on? If you are writing to this data you need to be sure to synchronize the HashMap because if you don't you can get into some serious problems with concurrency issues and HashMap resizing (synchronize reads and writes). If you load all of the data up then only read from the application then synchronizing the reads to the hash map won't matter (unless you allow reading while the loading is occuring). The application only caches data at startup and after that it performs only read operations regarding this cache. The next question would be: Even if only reading and you are are currently synchronizing the calls to this cached data are the operations long? If the operations to a synchronized resource are very long then other threads (requests in this case) will be delayed while trying to access the HashMap. I'm told that the accesses are not long ones ... The designer of this test just accesses the HashMap. If it exists, OK they return the value. If not they return the name of the requested key. Please don't blame my lack of knowledge in this matter, this being only what they've told me. I am far away (hundreds of pages of java docs) from understanding the functionality. I'm only providing support on linux for tomcat (installation with APR etc). They wanted to test this scenario on linux because on windows they claim it worked. However I can understand advises and put them into practice if needed. Also, as I said before, I am able to read some docs that would eventually get me to the point of solving and understanding the problem. Wade Thanks, Cristian - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: JSTL
Try this. download : http://cvs.apache.org/builds/jakarta-taglibs/nightly/ In unix gzip -c ~/dls/jakarta-taglibs-20051122.tar.gz | tar xvf - mv jstl.jar and standard.jar (from jakarta-taglibs/standard/lib/) to $CATALINA_HOME/shared/lib Now its available to all your webapps.. This would resolve the WEB-INF/lib issue you pointed out. Does that help? On Nov 22, 2005, at 20:04, Behrang Saeedzadeh wrote: Hi, Isn't JSTL a standard part of the J2EE 1.4 Web containers? Shouldn't it be available to Web apps out of the box with no need to include the JAR files in the WEB-INF/lib and referencing to their tlds in the web.xml? Thanks in advance, Behi -- Science is a differential equation. Religion is a boundary limit - Alan Turing Behrang Saeedzadeh http://www.jroller.com/page/behrangsa http://my.opera.com/behrangsa - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Java databases as alternative to MySQL on OS X Server? (OT)
On Monday, 28 בNovember 2005 19:59, Mieke Banderas wrote: Given the sad, sad performance findings at: No More Apple Mysteries, Part Two Date: September 1st, 2005 http://www.anandtech.com/mac/showdoc.aspx?i=2520 I don't enough of JVMs to know if Javabased DBs are usually better performancewise than MySQL/PostgreSQL, but my thought was that if everything is kept within the JVM, the weak performance spots in OS X would be minimized as threads would be handled within JVM rather than within OS X. Threads being being the prime suspect in the weak MySQL performance in OS X according Anandtech. After reading the article I can say two things: a) I think their take on the thread vs. process creation issue is completely wrong. They are basically saying thread creation on linux is the same as process creation and is very fast, but thread creation on MAC OSX is not the same as process creation because process creation also creates a task. Because we tested process creation to be slower on MAC OSX, we conclude that thread creation is slower. Am I the only one that see how broken the logic here ? b) Even assuming they are right, you still want to choose MySQL over JVM space databases, because Java and Java databases are very much thread enabled and create and destroy many threads. MySQL OTOH uses very little threads - essentially it only creates a new thread to handle a new client, and even then a single thread handles several clients before another thread is required. -- Oded Arbel m-Wise mobile solutions [EMAIL PROTECTED] +972-9-9611212 (204) +972-54-7340014 ::.. General Failure's Fault. Not Yours. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Session-timeout
Hi all. I have a server with multiple applications running under Tomcat 5.5 In TOMCAT_HOME/conf/web.xml session-timeout is set to 30 In TOMCAT_HOME/webapps/myapp/WEB-INF/web.xml session-timeout is set to -1 (infinite) Users are being timed out of their sessions after 30 minutes as opposed to never being timed out. David A. Morrow Technical Systems Lead Autodata Solutions Company [EMAIL PROTECTED] http://www.autodata.net * PLEASE NOTE THAT EFFECTIVE DEC 1,2005 MY TELEPHONE NUMBER WILL CHANGE * NEW !!! Tel: (519) 963-3020 Fax: (519) 451-6615 Poor planning on your part does not necessarily constitute an emergency on my part! This message has originated from Autodata Solutions. The attached material is the Confidential and Proprietary Information of Autodata Solutions. This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please delete this message and notify the Autodata system administrator at [EMAIL PROTECTED] mailto:[EMAIL PROTECTED]
Re: heap size problems (speed) [2]
--- Cristian [EMAIL PROTECTED] wrote: I don't think your CPU L caches are going to influence the issues you are seeing...not noticeably..not with todays hardware. Cristian is resizing the java heap to allow it to get larger than it was able before (default or the Tomcat default setting). In this case heap being the amount of memory the java process is going to be able to use for the process aside from the static space which can not be controlled by the heap setting being used. How much memory does your computer physically have Cristian? Are you also using -Xms512m? I'll wait to here about your memory first before making other comments on that. 1G of RAM and I do not set -Xms512m swap space is hit ocasionaly but not all the time. The next thing I'm going to ask deals with another issue we had on the list. Do you also write to the HashMap from your application? Are you reading and writing to this cache or your application loads this cached data at start up and it is merely read from that point on? If you are writing to this data you need to be sure to synchronize the HashMap because if you don't you can get into some serious problems with concurrency issues and HashMap resizing (synchronize reads and writes). If you load all of the data up then only read from the application then synchronizing the reads to the hash map won't matter (unless you allow reading while the loading is occuring). The application only caches data at startup and after that it performs only read operations regarding this cache. The next question would be: Even if only reading and you are are currently synchronizing the calls to this cached data are the operations long? If the operations to a synchronized resource are very long then other threads (requests in this case) will be delayed while trying to access the HashMap. I'm told that the accesses are not long ones ... The designer of this test just accesses the HashMap. If it exists, OK they return the value. If not they return the name of the requested key. Please don't blame my lack of knowledge in this matter, this being only what they've told me. I am far away (hundreds of pages of java docs) from understanding the functionality. I'm only providing support on linux for tomcat (installation with APR etc). They wanted to test this scenario on linux because on windows they claim it worked. However I can understand advises and put them into practice if needed. Also, as I said before, I am able to read some docs that would eventually get me to the point of solving and understanding the problem. Wade Thanks, Cristian I don't know really. I've not seen issues with HashMap in a Linux vs. Windows scenario (might check JRE/JDK bug reports). Since your swap isn't being hit all the time I wouldn't say it would be that. I don't know really where to direct you without knowing more, because the general issues don't seem to be the cause. Does the application perform badly with only a few hits to the site? Does the application get under heavy load then stop working? Wade - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
ClassNotFoundException when upgrading from 5.5.9 to 5.5.10+
When I start up tomcat 5.5.10-12 I am getting a ClassNotFoundException for a custom class that implements Filter. Under 5.5.9 and 5.5.1 the class loads just fine. My class lives in a jar file in shared/lib as some if it is required by another webapp. If I move the class files in question to the webapp/classes dir tomcat appears to be able to find it but then it gives a NoClassDefError instead. I read the FAQ and looked but I cannot find another servlet.jar anywhere so I do not believe this is the problem. The filter class is defined in the web.xml file for the webapp. I cannot find anything in the changelog from 5.5.10 and up that would explain or even seem related to this. I would appreciate any help I can get at this point! Thanks, David - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Monitoring Tomcat conenction pool
Hello RObert DBCP has configuration parameters available which will enable you to tune your connection pool check out http://jakarta.apache.org/commons/dbcp/configuration.html you can also set these parameters at the server.xml level check out this example at experts-exchange http://www.experts-exchange.com/Web/Web_Languages/JSP/Q_21306503.html HTH, Martin- - Original Message - From: Robert Palmer [EMAIL PROTECTED] To: users@tomcat.apache.org Sent: Monday, November 28, 2005 12:33 PM Subject: Monitoring Tomcat conenction pool Is there any tool available to monitor the database connection pools on a Tomcat server. I would like to be able to determine which connections are in use at any time. Thanks - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Integration with MQSeries
Hi, We are planning to use Tomcat for MQSeries integration. We need to create Web services that will run on a webserver. These web services will get the data from MQ, transform the data and call a backend application. Can we do this using Tomcat? Can anyone give me some sort of overview of how to do that? Any pointer related to this will be most welcome. Thanks, Maharshi
Re: heap size problems (speed) [2]
- Original Message - From: Wade Chandler [EMAIL PROTECTED] To: Tomcat Users List users@tomcat.apache.org Sent: Monday, November 28, 2005 11:27 PM Subject: Re: heap size problems (speed) [2] I don't know really. I've not seen issues with HashMap in a Linux vs. Windows scenario (might check JRE/JDK bug reports). Since your swap isn't being hit all the time I wouldn't say it would be that. I don't know really where to direct you without knowing more, because the general issues don't seem to be the cause. Does the application perform badly with only a few hits to the site? Does the application get under heavy load then stop working? Unfortunatelly this test application performs badly from the first hit. Frankly I have no ideea what's the point of loading almost 400M of data in memory in a HashMap. Maybe this very approach has a design flaw when it comes to JAVA. Luckly this is only a test and I'm being asked why it does not work on Linux and mostly if I can take it out from this won't budge state :). Anyway, I will take a closer look at the problem of JRE/JDK possible bugs and perhaps at some kernel settings that might cause this. Or maybe I'm just missing/mistaking something and I do not realize for the moment. Wade Thanks a lot, Cristian - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Integration with MQSeries
If you want to run Web Services on Tomcat look at Apache AXIS. From AXIS services you are going to post messages to an MQ manager, probably via JMS. Then you will need to monitor the queue at the other end to call your backend application. I don't wish to be rude here but how have you come to these decisions? Has the system been designed in the way by an architect? -Original Message- From: Mukherjee, Maharshi [mailto:[EMAIL PROTECTED] Sent: 28 November 2005 22:31 To: 'users@tomcat.apache.org' Subject: Integration with MQSeries Hi, We are planning to use Tomcat for MQSeries integration. We need to create Web services that will run on a webserver. These web services will get the data from MQ, transform the data and call a backend application. Can we do this using Tomcat? Can anyone give me some sort of overview of how to do that? Any pointer related to this will be most welcome. Thanks, Maharshi - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: heap size problems (speed) [2]
1024 K is still relatively small compare to a heap size of 512M. The fact is that Duron is really the low-end of AMD processor family. It shouldn't be used for any serious computing purpose. I'd like to suggest doing the test at least on an Athlon. Hardware is really cheap nowadays. ND -Original Message- From: Cristian [mailto:[EMAIL PROTECTED] Sent: Monday, November 28, 2005 1:27 PM To: Tomcat Users List Subject: Re: heap size problems (speed) [2] - Original Message - From: Duan, Nick [EMAIL PROTECTED] To: Tomcat Users List users@tomcat.apache.org Sent: Monday, November 28, 2005 7:30 PM Subject: RE: heap size problems (speed) [2] Were you using the right JVM? There were two JDK download for LINUX on Sun's web site. I have downloaded : J2SE(TM) Development Kit 5.0 Update 5 Linux self extracting file (although I think I should have get the rpm). I've extrated it in a separate directory and set JAVA_HOME in tomcat to point to that dir. Does it make any difference other than the fact that this way it is not rpm compliant? The main problem may be your AMD Duron processor which has a very small cache size (I believe it's about 512K). Once the processor cache reaches its limit, increasing the JVM heap size won't be very effective. This is even worse for my AMD Duron cache size : 64 KB but on the other machine I have : cache size : 1024 KB and still get the same results. Cristian - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: heap size problems (speed) [2]
From: Cristian S [mailto:[EMAIL PROTECTED] Subject: Re: heap size problems (speed) [2] Frankly I have no ideea what's the point of loading almost 400M of data in memory in a HashMap. If it's worth doing, it's worth doing to excess. Or maybe not. Try turning on -verbose:gc and see if you're going through a lot of garbage collections. If your max heap is 512mb and you're using 400mb of it for the cache, there may not be much left for request processing. Should also try a memory profiler to see just how full the heap really is. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Unable to perform replication request.
I have 2 tomcat instances (t1, t2) each running in Eclipse (e1, e2).
I kick off tomcat in both. My app loads in both. I am using the JK
redirector from IIS to load balance between the 2 instances. I bring up a
browser and enter my URL (http://localhost/Acuity). I have a breakpoint in
the sessionListener of the app. It breaks there in t1, so I step through. At
the end of stepping through 'sessionCreated(event)', I run, and it
immediately gives me an exception in t2, and breaks in the session listener
breakpoint (same place) I set there
My Questions are:
1)When is sessionCreated called by Tomcat, i.e., exactly when does a session
get created and how?
2)I get an error at the end of t1.sessionCreated after it steps out of the
function. The error occurs somewhere after t1.sessionCreated and before
t2.sessionCreated. I THINK, it is a replication issue based on the exception
(see t2 exception below), however there may be code that is getting called
between exit of t1.sessionCreated and enter of t2.sessionCreated.
3) How do you debug issues like this???
t1 startup:
.
.
.
INFO: Start ClusterSender at cluster Catalina:type=Cluster,host=localhost
with name Catalina:type=ClusterSender,host=localhost
Nov 28, 2005 3:52:03 PM org.apache.catalina.cluster.mcast.McastService start
INFO: Sleeping for 2000 secs to establish cluster membership
Nov 28, 2005 3:52:05 PM org.apache.catalina.cluster.mcast.McastService
registerMBean
INFO: membership mbean registered
(Catalina:type=ClusterMembership,host=localhost)
Nov 28, 2005 3:52:05 PM org.apache.catalina.cluster.deploy.FarmWarDeployer
start
INFO: Cluster FarmWarDeployer started.
Nov 28, 2005 3:52:07 PM org.apache.catalina.cluster.session.DeltaManager
start
INFO: Register manager /Acuity to cluster element Host with name localhost
Nov 28, 2005 3:52:07 PM org.apache.catalina.cluster.session.DeltaManager
start
INFO: Starting clustering manager at /Acuity
Nov 28, 2005 3:52:07 PM org.apache.catalina.cluster.session.DeltaManager
getAllClusterSessions
INFO: Manager [/Acuity]: skipping state transfer. No members active in
cluster group.
='We are running Acuity in cluster mode. Current cluster Members:
org.apache.catalina.cluster.mcast.McastMember[tcp://192.168.1.235:4001,catal
ina,192.168.1.235,4001, alive=100]
--
Acuity AppLifecycleListener - context created
= 'Acuity Web Application Initialized' =
t2 startup:
.
.
.
INFO: Start ClusterSender at cluster Catalina:type=Cluster,host=localhost
with name Catalina:type=ClusterSender,host=localhost
Nov 28, 2005 3:53:30 PM org.apache.catalina.cluster.mcast.McastService start
INFO: Sleeping for 2000 secs to establish cluster membership
Nov 28, 2005 3:53:31 PM org.apache.catalina.cluster.tcp.SimpleTcpCluster
memberAdded
INFO: Replication member
added:org.apache.catalina.cluster.mcast.McastMember[tcp://192.168.1.235:4001
,catalina,192.168.1.235,4001, alive=85703]
Nov 28, 2005 3:53:32 PM org.apache.catalina.cluster.mcast.McastService
registerMBean
INFO: membership mbean registered
(Catalina:type=ClusterMembership,host=localhost)
Nov 28, 2005 3:53:32 PM org.apache.catalina.cluster.deploy.FarmWarDeployer
start
INFO: Cluster FarmWarDeployer started.
Nov 28, 2005 3:53:34 PM org.apache.catalina.cluster.session.DeltaManager
start
INFO: Register manager /Acuity to cluster element Host with name localhost
Nov 28, 2005 3:53:34 PM org.apache.catalina.cluster.session.DeltaManager
start
INFO: Starting clustering manager at /Acuity
Nov 28, 2005 3:53:34 PM org.apache.catalina.cluster.session.DeltaManager
getAllClusterSessions
WARNING: Manager [/Acuity], requesting session state from
org.apache.catalina.cluster.mcast.McastMember[tcp://192.168.1.235:4001,catal
ina,192.168.1.235,4001, alive=89265]. This operation will timeout if no
session state has been received within 60 seconds.
Nov 28, 2005 3:53:34 PM org.apache.catalina.cluster.session.DeltaManager
waitForSendAllSessions
INFO: Manager [/Acuity]; session state send at 11/28/05 3:53 PM received in
203 ms.
='We are running Acuity in cluster mode. Current cluster Members:
org.apache.catalina.cluster.mcast.McastMember[tcp://192.168.1.235:4001,catal
ina,192.168.1.235,4001, alive=90281]
org.apache.catalina.cluster.mcast.McastMember[tcp://192.168.1.235:4002,catal
ina,192.168.1.235,4002, alive=2172]
--
Acuity AppLifecycleListener - context created
= 'Acuity Web Application Initialized' =
t1/t2 sessionCreated code:
HttpSession session = event.getSession();
//session.setAttribute(machine, t1);
ServletContext context = session.getServletContext();
Hashtable sessionMap = (Hashtable) context.getAttribute( SessionMap );
if( sessionMap == null )
{
sessionMap = new Hashtable();
context.setAttribute( SessionMap, sessionMap );
}
//sessionMap.put( session, session ); // Register that this session is
active
t2 exception:
Re: Java databases as alternative to MySQL on OS X Server? (OT)
Oded Arbel said: b) Even assuming they are right, you still want to choose MySQL over JVM space databases, because Java and Java databases are very much thread enabled and create and destroy many threads. But do they do it mainly within the OS or within the JVM? Top or PS doesn't show individual processes within the JVM. I'm not clear on how Java processes/threads relate to OS processes/threads. I'd like to know where/how exactly Java threads are started/killed on Hotspot in OS X. Doesn't java threads mainly intercommunicate within the JVM? Context switches? Is it really a completely dead end that minimizing the OS threading in Mac OS X and keeping threads within JVM could improve performance? Of course the Java DB in question would have to be somewhat similar to MySQL in performance, but possibly the Java DB could perform better with many connections as that is where MySQL on OS X breaks down according to anandtech. MySQL OTOH uses very little threads - essentially it only creates a new thread to handle a new client, and even then a single thread handles several clients before another thread is required. But according to the anandtech article OS X is the only platform where performance breaks down after raising the amount of connections. So it would seem until Apple fixes the performance problems - which certainly may take a while-, ways to use databases without creating many expensive (in theory) OS threads could be desirable. Obviously the only way to know for sure if this is true would be to test load MySQL on ones own server and also test load a Java database. Do anyone know of anyone who have done load testing on OS X and published the results? I'm on OS X Server 10.2 so even older tests are of interest. (I'm going to google it now of course) - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: heap size problems (speed) [2]
Agreed for memory profiler I would check out http://www.khelekore.org/jmp/ If this solution is workable you may want to set environment variable JAVA_OPTS to include -verbose:gc Martin- - Original Message - From: Caldarale, Charles R [EMAIL PROTECTED] To: Tomcat Users List users@tomcat.apache.org Sent: Monday, November 28, 2005 6:18 PM Subject: RE: heap size problems (speed) [2] From: Cristian S [mailto:[EMAIL PROTECTED] Subject: Re: heap size problems (speed) [2] Frankly I have no ideea what's the point of loading almost 400M of data in memory in a HashMap. If it's worth doing, it's worth doing to excess. Or maybe not. Try turning on -verbose:gc and see if you're going through a lot of garbage collections. If your max heap is 512mb and you're using 400mb of it for the cache, there may not be much left for request processing. Should also try a memory profiler to see just how full the heap really is. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Java databases as alternative to MySQL on OS X Server? (OT)
Mieke Banderas said: I'd like to know where/how exactly Java threads are started/killed on Hotspot in OS X. Doesn't java threads mainly intercommunicate within the JVM? Context switches? Is it really a completely dead end that minimizing the OS threading in Mac OS X and keeping threads within JVM could improve performance? It would seem so, as I now learnt that The HotSpot JVM uses native threads. The only possible escape then would be to use another JVM that doesn't on OS X. But I'm not sure how advisable that is. Anyone uses alternative JVMs on OS X out there? I downloaded AppPerfect Test Studio http://www.appperfect.com/ products/devsuite/jp.html to see if I can build a test case and test my current server and perhaps make comparisons with some of the suggested Java DBs later. AppPerfect support was very helpful suggesting test methods. Anyone out there testing their webapplications with this product? I wonder how much faster Linux could run on my G3 server hardware. I would have lots of work replacing all the built in services in Mac OS X Server to give me all that control also in Linux, buy maybe I have to. I'm a bit cashstrapped for new hardware, so I need to get as much performance I can. Or perhaps I should try to get a PC just for the DBs. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Java databases as alternative to MySQL on OS X Server? (OT)
From: Mieke Banderas [mailto:[EMAIL PROTECTED] Subject: Re: Java databases as alternative to MySQL on OS X Server? (OT) It would seem so, as I now learnt that The HotSpot JVM uses native threads. The only possible escape then would be to use another JVM that doesn't on OS X. But I'm not sure how advisable that is. Anyone uses alternative JVMs on OS X out there? The last JVM I know of that avoided native threads was Sun's 1.3 version running in green threads mode. Performance and stability were nothing to brag about. There are several academic JVMs kicking around with varying degrees of stability and compliance with the spec that might not use native threads. None are really appropriate for production use. I've only toyed with it, but Solaris 10, along with Postgres, is available for free download, ready to install and run on an x64/x86 system. Yet another learning curve... - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Web-application and Tomcat icon
On 11/29/05, Aladin Alaily [EMAIL PROTECTED] wrote: Hello, Every time I deploy an application using Tomcat 5.5.12, the usual tomcat icon is being displayed in the url. I would like to know how I can replace that icon with my own... or better yet, no put any icon at all. The icon displayed on the browser is favicon.ico that is in ROOT. You can replace it with your own icon. -- rgds Anto Paul - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: How to set the admin console for 5.5.x
From: N S, Shridhar [mailto:[EMAIL PROTECTED] Subject: Re: How to set the admin console for 5.5.x I had followed all these steps, except that the admin folder under ROOT was missing! Since, this is not documented in Tomcat documents, thought of sharing the exact steps. An interesting theory, but it's not correct. The webapps/ROOT/admin directory contains only the dummy admin page that says the admin app must be separately downloaded and installed. This directory can be completely removed with no ill effects (I've just tried it). I suspect that the real problem may have been that during your experimentation you put the index.html file from webapps/ROOT/admin into server/webapps/admin; when I did that, I got the same symptoms you did. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Web-application and Tomcat icon
From: Anto Paul [mailto:[EMAIL PROTECTED] Subject: Re: Web-application and Tomcat icon On 11/29/05, Aladin Alaily [EMAIL PROTECTED] wrote: I would like to know how I can replace that icon with my own... or better yet, no put any icon at all. The icon displayed on the browser is favicon.ico that is in ROOT. You can replace it with your own icon. This is browser cuteness. If you run a packet trace [I'm doing almost anything tonight to avoid writing documentation], you'll see something like: GET /favicon.ico HTTP/1.1\r\n coming from the browser near the end of a page load (at least with Firefox). Besides replacing favicon.ico, you can also just delete it without harm other than having Firefox show a blank page icon instead. IE, of course, won't show anything other than its own logo, AFAIK. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: JDBC Resource Configuration
Martin Dubuc wrote: I am defining a number of JNDI resources in the server.xml file in the GlobalNamingResources section. As part of defining JDBC resources in this section, the username and password attributes are specified. The password is specified as clear text. I am wondering if there are ways to encrypt the passwords used for the JDBC resources or if it is possible not Well, you have to give credentials someplace, server.xml seams like a good place to do it. It can be made unreadable by users other than tomcat. to define at all, but provide it in the Java sources instead. ??? Isn't that stupid? Sorry for lashing out, but one of the ideas of defining a JNDI resource IS the ability to move connection credentials, among other things, OUT of your source. Why would you want every developer on your team (including those 20 in India) to know your user/pass for the DB? What is the benefit? Nix. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Singleton memory leak after redeploying.
On Mon, Nov 28, 2005 at 06:24:52PM +0100, Lionel Farbos wrote: Hi Juan, I think your problem can't be solved (only) by Tomcat. The problem is that objets stay in memory because of pointers on static references... but aren't those supposed to go away when the classloader is no longer referenced? If you can't get to the classloader that loaded the class then you can't get to the static fields, so it should be gc'd. no? eric - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: css and images (stupid question?)
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi Terence et al; and at first thanks for the many hints regarding this issue. Terence M. Bandoian schrieb: My understanding is that relative URLs in CSS style sheets are relative to the location of the style sheet, not the HTML page which references the style sheet. Yeah, indeed. I finally solved my problems by referencing to the css within my jsps using the absolute server path, and now everything works the way it's supposed to. Thanks guys! :) Cheers, Kris - -- Kristian Rink * http://zimmer428.net * jab: [EMAIL PROTECTED] icq: 48874445 * fon: ++49 176 2447 2771 Be yourself the kind of change you want to see in this world. (Gandhi) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFDjAAAcxBAPOA1m6wRAo/FAJ4rbXr3c1BmJTK+Lf8mK8xQQuujDwCfUncH hVp1o/q0DjeCoqMCFT7Qp3E= =2WXq -END PGP SIGNATURE- - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
unix user auth within servlets/jsps?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi all; another question which probably can be considered stupid, but nevertheless: I'm in an attempt of learning how to deal with server-sided java by rebuilding an intranet solution formerly implemented in Perl which currently runs atop gnu/linux. The java solution I'm about to build is intended to fully replace this, which requires me to do two basic things besides just presenting content: - - users need to be enabled to upload files to some pre-defined folder within the unix filesystem - - users need to have a download page where they can fetch files from within their $HOME - From a Perl programmers point of view, determining which folders to use might be an easy task doing some black text-processing magic using /etc/passwd, but that's somehow not the way, I guess. Besides this, users of course need to login to the site before they may up/download anything, so I need to authenticate them against the Unix-style user information stored locally. I'm not yet completely sure how to deal with this... So, two questions: * How to link a jsp/servlet-based app to any unix-based user management? Will I have to take a dive into JAAS for this, or is there a faster way? * Generally, since this is not really tomcat-related (just to the point that I'm using tomcat for this): Can anyone recommend a good mailing-list for j2ee newbies? :) Thanks for any hints and bye. Cheers, Kris - -- Kristian Rink * http://zimmer428.net * jab: [EMAIL PROTECTED] icq: 48874445 * fon: ++49 176 2447 2771 Be yourself the kind of change you want to see in this world. (Gandhi) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFDjAG/cxBAPOA1m6wRAhCFAJ93nOEvBmswoIPShERNzMHEN2vEowCfRn3z J/0u0aHMlfJJm7tMeN0Nu98= =xMMI -END PGP SIGNATURE- - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Web-application and Tomcat icon
Caldarale, Charles R wrote: From: Anto Paul [mailto:[EMAIL PROTECTED] Subject: Re: Web-application and Tomcat icon On 11/29/05, Aladin Alaily [EMAIL PROTECTED] wrote: I would like to know how I can replace that icon with my own... or better yet, no put any icon at all. The icon displayed on the browser is favicon.ico that is in ROOT. You can replace it with your own icon. This is browser cuteness. If you run a packet trace [I'm doing almost anything tonight to avoid writing documentation], you'll see something like: GET /favicon.ico HTTP/1.1\r\n coming from the browser near the end of a page load (at least with Firefox). Besides replacing favicon.ico, you can also just delete it without harm other than having Firefox show a blank page icon instead. IE, of course, won't show anything other than its own logo, AFAIK. And the hilarious thing is that IE 5.5 introduced that Favourite Icon concept, I believe. It was taken out in 6.0. Talk about consistency... I mean, I know it is just bells and whistles, but it was kinda nice. Nix. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
