Re: Tomcat App becomes Unresponsive
Am Freitag, den 25.01.2008, 16:40 -0500 schrieb tc:
The calls look like this:
public void testXXX(DataSource ds, String login) {
PreparedStatement ps=null;
ResultSet rs=null;
try {
...
}catch (Exception e) {
System.out.println(Exception: + e);
e.printStackTrace();
}
finally {
try {
...
try {
if(conn != null || conn.isClosed()) conn.close();
You are closing the connection only, if it is not null and already
closed. So it will most likely be left open. You probably wanted
if ( !(conn == null || conn.isClosed()) ) { conn.close() }; // but why
should the connection be closed here?
If you think you have a datasource connection leak, you can search the
docs
http://tomcat.apache.org/tomcat-6.0-doc/jndi-datasource-examples-howto.html for
Preventing dB connection pool leak and setting the logAbandoned,
removeAbandoned and removeAbandonedTimeout parameters in your
datasource.
Bye
Felix
-
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Re: Download Dialog inclusing file extention
You should use Content-Disposition header in your response. It allows you to provide filename of the file, and that includes its extension. Also, I suppose that the save as dialog honors the mime-type of your response. If that mime-type is known at your client computers, it may offer the relevant extension. I have not tested that, though. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Need *faster* connection abort with mod_jk
Hi Chris,
you are totally right. It was a little late yesterday :(
I updates the two patches. The only change is in jk_ajp_common.c. The
flax call inside ajp_next_connection is replaced by the normal one, so
no more change there and instead the normal one in ajp_reset_endpoint
now is a flex one.
I overlokked the obvious fact, that the client error is non recoverable,
so we don't close the connection in ajp_next_connection, but instead
immediately abort the service until later done is called and regularly
closes the connection in ajp_reset_enpoint.
The patch should be safe in the sense that I don't expect problems. It's
a little to early to guarantee inclusion in the regular distribution though.
Let us know, if you deploy it into production, and if it solves your
problem.
Regards,
Rainer
Chris Hut schrieb:
Hi Rainer, thanks so much for the reply, this is looks like just what we
need!
I tried your patch on 1.2.26 and unfortunately it did not quite work -
still got the 30 second wait. I dug a little deeper with some debugging
code and it looks like, in the case of a client abort, the code goes
through the old jk_shutdown_socket function (which forces linger to be
set to true) instead of the new jk_flex_shutdown_socket.
Here's my log output, my additions preceded with =:
[Fri Jan 25 19:40:18.516 2008] [7419:1147140448] [info]
ajp_process_callback::jk_ajp_common.c (1606): Writing to client aborted
or client network problems
[Fri Jan 25 19:40:18.516 2008] [7419:1147140448] [info]
ajp_service::jk_ajp_common.c (2191): (worker1) sending request to tomcat
failed (unrecoverable), because of client write error (attempt=1)
[Fri Jan 25 19:40:18.516 2008] [7419:1147140448] [info]
ajp_reset_endpoint::jk_ajp_common.c (695): == non-reusable endpoint,
calling jk_shutdown_socket
[Fri Jan 25 19:40:18.516 2008] [7419:1147140448] [info]
jk_shutdown_socket::jk_connect.c (636): == in jk_shutdown_socket,
calling jk_flex_shutdown_socket with linger set to TRUE
[Fri Jan 25 19:40:18.516 2008] [7419:1147140448] [info]
jk_flex_shutdown_socket::jk_connect.c (661): == linger is: 1
Experimenting some more, I found that if I changed line 695 in
jk_ajp_common.c from:
jk_shutdown_socket(ae-sd, l);
To:
jk_flex_shutdown_socket(ae-sd, ae-linger, l);
Then it works perfectly. But, I hesitate to deploy my own hacks to our
production systems so if you could give this a once-over (and perhaps an
updated patch file, if you have time) that would be fantastic.
Thanks again for the help!
Chris
-Original Message-
From: Rainer Jung [mailto:[EMAIL PROTECTED]
Sent: Friday, January 25, 2008 4:37 PM
To: Tomcat Users List
Subject: Re: Need *faster* connection abort with mod_jk
Hi Chris,
perfect, that makes sense! Yes, we are draining the backend connection
before closing it down, and since in your case the backend is happy to
go along and proceed streaming it's not just a question of capturing a
few additional bytes.
Mladen Turk added the connection draining a while ago, so we might need
to discuss the pros and cons. The URL you gave includes a nice
description. In our case there is no pipelining and once we finished
sending the request (including possible request body) to the backend,
closing without draining should be save.
I made a patch, that should disable connection draining exactly if we
got a write error when using the client connection. The patch is
available at
http://people.apache.org/~rjung/mod_jk-dev/patches/jk_close_immediate_on
_client_wr_error.patch
(for 1.2.27-dev) and
http://people.apache.org/~rjung/mod_jk-dev/patches/jk_close_immediate_on
_client_wr_error-1_2_26.patch
(for 1.2.26)
If you want to test it, I would suggest using 1.2.26, because 1.2.27-dev
is not well tested yet and there are quite some changes in it.
Have fun,
Rainer
Chris Hut schrieb:
Hi Rainer, thanks for the reply!
interesting use case :)
Just trying to keep things entertaining around here :)
are you writing something back during the wait time, or are you
simply
doing processing on the backend?
Yes, the long-running process (video rendering) is also streaming the
video bytes back to the client using outputStream.write(). It's this
write (ultimately, to an org.apache.catalina.connector.OutputBuffer)
that throws the ClientAbortException, if the client is actually gone.
So I figured out that JK is definitely holding open its connection
Tomcat meaning Tomcat does not know to abort. In desperation I
searched for the number 30 (hoping for a constant) in the mod_jk
source code, and found this in jk_connect.c:
#ifndef MAX_SECS_TO_LINGER
#define MAX_SECS_TO_LINGER 30
#endif
...
int jk_shutdown_socket(jk_sock_t s)
{
...
do {
/* Read all data from the peer until we reach end-of-file
* (FIN from peer) or we've exceeded our overall timeout. If
the
* backend does not send us bytes within 2 seconds
* (a value pulled from Apache 1.3 which seems to work
Re: find out the possible bottleneck webapp
I think that java thread dump can be printed even if workload is heavy. kill -3 command will produce it under UNIXes. 2008/1/24, maggie [EMAIL PROTECTED]: Is there any tool to provide such information Remotely even if the workload of Tomcat is very heavy? - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Performance Question
Hello Ali, please find included below a link URL that addresses the JSF performance issue. A much more rigorous test would be to use the JMeter distributed testing using the JMeter server. HTH, David. Ali Ok wrote .. Hi, We are building a web application with JSF. Last day I tested it with JMeter. Results are bad (I guess). Then I tried to send 3 requests with JMeter to Shuffle Example in Tomcat's examples directory with a limited size of (256 MB I think) memory resource given to Tomcat. This Shuffle Example does not query database or does not make complicated operations as you know; it is very simple. Question is, what should I expect? Does it have to respond all requests? Or is it normal to throw an exception about Too many open files (I use NIO connector) and finally OutOfMemoryError and parachute-thing? After I solve this, I can go on to JSF application testing. I couldnt find documents enough about this issue. Can you send me some links? Thanks in advance. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Performance Question
Thanks David, I mean, if I make 3 requests in a very short time (about 10 seconds); Tomcat does not respond. I read books, tutorials, faqs and threads at maling list about Tomcat tuning. But I couldnt find an example server.xml file used in production or real test results. So I cant understand if 3 requests in 10 seconds is normal or not. 2008/1/26, David Brown [EMAIL PROTECTED]: Hello Ali, please find included below a link URL that addresses the JSF performance issue. A much more rigorous test would be to use the JMeter distributed testing using the JMeter server. HTH, David. Ali Ok wrote .. Hi, We are building a web application with JSF. Last day I tested it with JMeter. Results are bad (I guess). Then I tried to send 3 requests with JMeter to Shuffle Example in Tomcat's examples directory with a limited size of (256 MB I think) memory resource given to Tomcat. This Shuffle Example does not query database or does not make complicated operations as you know; it is very simple. Question is, what should I expect? Does it have to respond all requests? Or is it normal to throw an exception about Too many open files (I use NIO connector) and finally OutOfMemoryError and parachute-thing? After I solve this, I can go on to JSF application testing. I couldnt find documents enough about this issue. Can you send me some links? Thanks in advance. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Performance Question
30,000 requests in 10 seconds probably isn't normal traffic, but it could represent a sudden spike. think of it another way, that's 3,000 requests per second. If we calculate that for a 10 hour period, it puts things in perspective 1000 req/sec * 60 sec/min = 60,000 req/min 60,000 req/min * 60 min/hr = 3,600,000 req/hr 3,600,000 req/hr * 10 hr = 36,000,000 req that means during normal work hours, the server would get 36 million requests. to handle that kind of traffic, first you have to have the bandwidth. There's an old performance article I wrote that's listed on tomcat's article section. read that and see if it helps peter On Jan 26, 2008 10:14 AM, Ali Ok [EMAIL PROTECTED] wrote: Thanks David, I mean, if I make 3 requests in a very short time (about 10 seconds); Tomcat does not respond. I read books, tutorials, faqs and threads at maling list about Tomcat tuning. But I couldnt find an example server.xml file used in production or real test results. So I cant understand if 3 requests in 10 seconds is normal or not. 2008/1/26, David Brown [EMAIL PROTECTED]: Hello Ali, please find included below a link URL that addresses the JSF performance issue. A much more rigorous test would be to use the JMeter distributed testing using the JMeter server. HTH, David. Ali Ok wrote .. Hi, We are building a web application with JSF. Last day I tested it with JMeter. Results are bad (I guess). Then I tried to send 3 requests with JMeter to Shuffle Example in Tomcat's examples directory with a limited size of (256 MB I think) memory resource given to Tomcat. This Shuffle Example does not query database or does not make complicated operations as you know; it is very simple. Question is, what should I expect? Does it have to respond all requests? Or is it normal to throw an exception about Too many open files (I use NIO connector) and finally OutOfMemoryError and parachute-thing? After I solve this, I can go on to JSF application testing. I couldnt find documents enough about this issue. Can you send me some links? Thanks in advance. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: find out the possible bottleneck webapp
From: Konstantin Kolinko [mailto:[EMAIL PROTECTED] Subject: Re: find out the possible bottleneck webapp kill -3 command will produce it under UNIXes. 2008/1/24, maggie [EMAIL PROTECTED]: Is there any tool to provide such information Remotely even if the workload of Tomcat is very heavy? There's a set of tools in the HotSpot JDK that look interesting: http://java.sun.com/javase/6/docs/technotes/tools/index.html#troubleshoo t The jstack one in conjunction with jsadebugd would be of interest here. - 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 start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Performance Question
Hello Ali, there are no absolute benchmarks for what you are looking for. The central theme to any performance questions invariably lead to the A word (Architecture). You need to evaluate you overall architecture from a high level perspective. With this said the questions then are: * What is your planned network topology once you go to production? This question naturally leads to what is your hosting options? If you have a datacenter and have configured and installed your own servers is the best. Next option is to build your servers and then co-locate. The least advantageous option is renting servers (serverbeach.com etc.). If you are hosting locally what is your upstream provider? (fat pipe) and type of connection: T1, T3, OC1, OC3 etc. * Type of scaling (horizontal vs vertical) * Invariably performance issues are rarely a result of the web container (Tomcat). You need to look at the developed software (dot).war that is deployed on TC (use JMeter or some recognized software testing tools). * I have worked on high volume financial web applications that are running at 3 to 4000 transactions/sec. A transaction is end-to-end a round-trip time starting with the HTTP connection, processing and connection to the backend DB, query results returned and subsequently a results web page displayed. This is a HTTP get, put or post transaction. * You are hitting your TC with 3 transactions with a ramp up speed of 10 seconds so you are at 3000/sec. If as you say the web container is not handling this you still need to look at what you web application is doing. Ultimately, using JMeter you need to look here: http://wiki.apache.org/jakarta-jmeter/ A expert in this area is Peter Lin: http://tomcat.apache.org/articles/performance.pdf The JMeter has specific JSF testing reading: http://wiki.apache.org/myfaces/PerformanceTestingWithJMeter Ali Ok wrote .. Thanks David, I mean, if I make 3 requests in a very short time (about 10 seconds); Tomcat does not respond. I read books, tutorials, faqs and threads at maling list about Tomcat tuning. But I couldnt find an example server.xml file used in production or real test results. So I cant understand if 3 requests in 10 seconds is normal or not. 2008/1/26, David Brown [EMAIL PROTECTED]: Hello Ali, please find included below a link URL that addresses the JSF performance issue. A much more rigorous test would be to use the JMeter distributed testing using the JMeter server. HTH, David. Ali Ok wrote .. Hi, We are building a web application with JSF. Last day I tested it with JMeter. Results are bad (I guess). Then I tried to send 3 requests with JMeter to Shuffle Example in Tomcat's examples directory with a limited size of (256 MB I think) memory resource given to Tomcat. This Shuffle Example does not query database or does not make complicated operations as you know; it is very simple. Question is, what should I expect? Does it have to respond all requests? Or is it normal to throw an exception about Too many open files (I use NIO connector) and finally OutOfMemoryError and parachute-thing? After I solve this, I can go on to JSF application testing. I couldnt find documents enough about this issue. Can you send me some links? Thanks in advance. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: comet end event
I downloaded the CometProcessor HTTPServlet event code and its running in TC6 with JDK6 when executing the attached client I see HTTP Status 405 - HTTP method GET is not supported by this URL - The specified HTTP method is not allowed for the requested resource (HTTP method GET is not supported by this URL).. The request sent by the client was syntactically incorrect (HTTP method GET is not supported by this URL). There were more than a couple of folks with the same error with no answer so.. Did anyone ask Filip for working client? My inclination is to put a bug in but I cant say implementing the NIOConnector is a supported TC6 feature Thanks Martin - Original Message - From: Peter Warren [EMAIL PROTECTED] To: Tomcat Users List users@tomcat.apache.org Sent: Friday, January 25, 2008 2:38 PM Subject: Re: comet end event I put up a war file at: http://www.nomad.org/comet_test.war. It includes the webapp, source for the comet servlet client, and the server.xml file. Let me know if I missed anything. As I mentioned before, I've also used your cometgui.jar client and see the end event generated when using it as well. If I submit a chunk and the last chunk (0crlfcrlf) together, I see a read error on the server. If I submit a chunk and then submit the last chunk in two separate submissions, I see an end event on the server. Peter On Jan 24, 2008 12:44 PM, Filip Hanik - Dev Lists [EMAIL PROTECTED] wrote: even with your code, I wasn't able to replicate what you were seeing. what I would need to see what's going on for you: 1. a war file with your comet server, and source code 2. a test client 3. your server.xml Filip - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Performance Question
Peter, thats ok, maybe some day we can get that much hit :) What if someone make so much requests and confuse the server? Does Tomcat have an prevention for this situation? Or is it beyond the scope? David, I have already read all of resources you sent. Invariably performance issues are rarely a result of the web container (Tomcat). You need to look at the developed software (dot).war that is deployed on TC (use JMeter or some recognized software testing tools). * You are hitting your TC with 3 transactions with a ramp up speed of 10 seconds so you are at 3000/sec. If as you say the web container is not handling this you still need to look at what you web application is doing. I dont talk about my application. It may contain bugs or incorrect logic, blaming Tomcat is not my intention. Many people thank developers and I admire Apache SF. I make that test of mine with Shuffle Example comes with Tomcat (XXX /examples/jsp/jsp2/jspattribute/shuffle.jsp). And it is a simple JSP page, cannot contain bugs :) * What is your planned network topology once you go to production? This question naturally leads to what is your hosting options? If you have a datacenter and have configured and installed your own servers is the best. Next option is to build your servers and then co-locate. The least advantageous option is renting servers (serverbeach.com etc.). If you are hosting locally what is your upstream provider? (fat pipe) and type of connection: T1, T3, OC1, OC3 etc. * Type of scaling (horizontal vs vertical) My purpose is finding out the limits of Tomcat with constant resources at the moment. Then I will continue with these. I just want to have an idea in general. However its better to give details. OS: Debian 4.0 r0 on VmWare RAM assigned to virtual machine: 1 gb CPU: Intel Core 2 Duo, 2 Ghz etc. Tomcat: 6.0.13 My starting script: /home/kullanici/Desktop/programlar/jdk1.6.0_03/bin/java -Xmx256m -Xms128m - Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager - Djava.util.logging.config.file=/home/kullanici/Desktop/programlar/Tomcat_6_win/conf/logging.properties- Djava.endorsed.dirs=/home/kullanici/Desktop/programlar/Tomcat_6_win/endorsed-classpath :/home/kullanici/Desktop/programlar/Tomcat_6_win/bin/bootstrap.jar:/home/kullanici/Desktop/programlar/Tomcat_6_win/bin/commons- logging-api.jar - Dcatalina.base=/home/kullanici/Desktop/programlar/Tomcat_6_win - Dcatalina.home=/home/kullanici/Desktop/programlar/Tomcat_6_win - Djava.io.tmpdir=/home/kullanici/Desktop/programlar/Tomcat_6_win/temp org.apache.catalina.startup.Bootstrap start Thank you, Peter and David 2008/1/26, David Brown [EMAIL PROTECTED]: Hello Ali, there are no absolute benchmarks for what you are looking for. The central theme to any performance questions invariably lead to the A word (Architecture). You need to evaluate you overall architecture from a high level perspective. With this said the questions then are: * What is your planned network topology once you go to production? This question naturally leads to what is your hosting options? If you have a datacenter and have configured and installed your own servers is the best. Next option is to build your servers and then co-locate. The least advantageous option is renting servers (serverbeach.com etc.). If you are hosting locally what is your upstream provider? (fat pipe) and type of connection: T1, T3, OC1, OC3 etc. * Type of scaling (horizontal vs vertical) * Invariably performance issues are rarely a result of the web container (Tomcat). You need to look at the developed software (dot).war that is deployed on TC (use JMeter or some recognized software testing tools). * I have worked on high volume financial web applications that are running at 3 to 4000 transactions/sec. A transaction is end-to-end a round-trip time starting with the HTTP connection, processing and connection to the backend DB, query results returned and subsequently a results web page displayed. This is a HTTP get, put or post transaction. * You are hitting your TC with 3 transactions with a ramp up speed of 10 seconds so you are at 3000/sec. If as you say the web container is not handling this you still need to look at what you web application is doing. Ultimately, using JMeter you need to look here: http://wiki.apache.org/jakarta-jmeter/ A expert in this area is Peter Lin: http://tomcat.apache.org/articles/performance.pdf The JMeter has specific JSF testing reading: http://wiki.apache.org/myfaces/PerformanceTestingWithJMeter Ali Ok wrote .. Thanks David, I mean, if I make 3 requests in a very short time (about 10 seconds); Tomcat does not respond. I read books, tutorials, faqs and threads at maling list about Tomcat tuning. But I couldnt find an example server.xml file used in production or real test results. So I cant understand if 3 requests in 10 seconds is normal or not. 2008/1/26, David Brown
RE: Tomcat Performance Question
From: Ali Ok [mailto:[EMAIL PROTECTED] Subject: Re: Tomcat Performance Question What if someone make so much requests and confuse the server? Does Tomcat have an prevention for this situation? You can configure the maximum number of requests a Connector will handle concurrently, as well as the maximum number Tomcat will queue for the Connector before discarding them: http://tomcat.apache.org/tomcat-6.0-doc/config/http.html See the 3rd paragraph of the Introduction. - 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 start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Reload modifed servlet
Hello all, My environment: Windows XP-Pro Tomcat 6 JDK 6 Eclipse JEE IDE I find that whenever I make a change to my servlet, I need to Clean/Rebuild the project in order for the changes to take effect. Even restarting Tomcat doesn't take the change. It didn't used to be this way!! I've set reloadable=true in Context.xml - doesn't help. This is the situation on one machine. On a different machine using the same environment I don't have this problem. Something about the way Tomcat was configured on this machine then? If anybody's had this probelm, please share your thoughts! Many thanks. Bob - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Performance Question
have you tried monitoring the CPU and IO usage of the system during the test? In the past, when I stress test an application, I monitor the cpu and io, to determine which part is getting maxed out first. For example, if I was serving up static pages, the first thing to mak out is the IO, so even though tomcat could handle greater loads, it can't because of the IO. What I usually do is identify the bottlenecks in the application by testing each part separately. Once I know the max through of each component, I ran the stress test with JMeter. If you haven't measured each piece individually, it will be difficult to figure why the application is slow. hope that helps peter On Jan 26, 2008 11:32 AM, Ali Ok [EMAIL PROTECTED] wrote: Peter, thats ok, maybe some day we can get that much hit :) What if someone make so much requests and confuse the server? Does Tomcat have an prevention for this situation? Or is it beyond the scope? David, I have already read all of resources you sent. Invariably performance issues are rarely a result of the web container (Tomcat). You need to look at the developed software (dot).war that is deployed on TC (use JMeter or some recognized software testing tools). * You are hitting your TC with 3 transactions with a ramp up speed of 10 seconds so you are at 3000/sec. If as you say the web container is not handling this you still need to look at what you web application is doing. I dont talk about my application. It may contain bugs or incorrect logic, blaming Tomcat is not my intention. Many people thank developers and I admire Apache SF. I make that test of mine with Shuffle Example comes with Tomcat (XXX /examples/jsp/jsp2/jspattribute/shuffle.jsp). And it is a simple JSP page, cannot contain bugs :) * What is your planned network topology once you go to production? This question naturally leads to what is your hosting options? If you have a datacenter and have configured and installed your own servers is the best. Next option is to build your servers and then co-locate. The least advantageous option is renting servers (serverbeach.com etc.). If you are hosting locally what is your upstream provider? (fat pipe) and type of connection: T1, T3, OC1, OC3 etc. * Type of scaling (horizontal vs vertical) My purpose is finding out the limits of Tomcat with constant resources at the moment. Then I will continue with these. I just want to have an idea in general. However its better to give details. OS: Debian 4.0 r0 on VmWare RAM assigned to virtual machine: 1 gb CPU: Intel Core 2 Duo, 2 Ghz etc. Tomcat: 6.0.13 My starting script: /home/kullanici/Desktop/programlar/jdk1.6.0_03/bin/java -Xmx256m -Xms128m - Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager - Djava.util.logging.config.file=/home/kullanici/Desktop/programlar/Tomcat_6_win/conf/logging.properties- Djava.endorsed.dirs=/home/kullanici/Desktop/programlar/Tomcat_6_win/endorsed-classpath :/home/kullanici/Desktop/programlar/Tomcat_6_win/bin/bootstrap.jar:/home/kullanici/Desktop/programlar/Tomcat_6_win/bin/commons- logging-api.jar - Dcatalina.base=/home/kullanici/Desktop/programlar/Tomcat_6_win - Dcatalina.home=/home/kullanici/Desktop/programlar/Tomcat_6_win - Djava.io.tmpdir=/home/kullanici/Desktop/programlar/Tomcat_6_win/temp org.apache.catalina.startup.Bootstrap start Thank you, Peter and David 2008/1/26, David Brown [EMAIL PROTECTED]: Hello Ali, there are no absolute benchmarks for what you are looking for. The central theme to any performance questions invariably lead to the A word (Architecture). You need to evaluate you overall architecture from a high level perspective. With this said the questions then are: * What is your planned network topology once you go to production? This question naturally leads to what is your hosting options? If you have a datacenter and have configured and installed your own servers is the best. Next option is to build your servers and then co-locate. The least advantageous option is renting servers (serverbeach.com etc.). If you are hosting locally what is your upstream provider? (fat pipe) and type of connection: T1, T3, OC1, OC3 etc. * Type of scaling (horizontal vs vertical) * Invariably performance issues are rarely a result of the web container (Tomcat). You need to look at the developed software (dot).war that is deployed on TC (use JMeter or some recognized software testing tools). * I have worked on high volume financial web applications that are running at 3 to 4000 transactions/sec. A transaction is end-to-end a round-trip time starting with the HTTP connection, processing and connection to the backend DB, query results returned and subsequently a results web page displayed. This is a HTTP get, put or post transaction. * You are hitting your TC with 3 transactions with a ramp up speed of 10 seconds so you are at
Re: Tomcat Performance Question
Ali Ok wrote: Thanks David, I mean, if I make 3 requests in a very short time (about 10 seconds); Tomcat does not respond. I read books, tutorials, faqs and threads at maling list about Tomcat tuning. But I couldnt find an example server.xml file used in production or real test results. So I cant understand if 3 requests in 10 seconds is normal or not. 3000 requests per second is something on the order of what microsoft gets on its entire set of websites (microsoft.com, hotmail, live, etc, all combined), and they have a big server farm running it. That's a lot of requests, and you need to provision your hardware and bandwidth accordingly. D - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat Performance Question
Good Point suggest taking a look at implementing Tomcat Clustering to accomodate greater loads http://wiki.apache.org/tomcat/FAQ/Clustering M- - Original Message - Wrom: VRESKPNKMBIPBARHDMNNSKVFVWRKJVZCMHVIB To: Tomcat Users List users@tomcat.apache.org Sent: Saturday, January 26, 2008 2:18 PM Subject: Re: Tomcat Performance Question Ali Ok wrote: Thanks David, I mean, if I make 3 requests in a very short time (about 10 seconds); Tomcat does not respond. I read books, tutorials, faqs and threads at maling list about Tomcat tuning. But I couldnt find an example server.xml file used in production or real test results. So I cant understand if 3 requests in 10 seconds is normal or not. 3000 requests per second is something on the order of what microsoft gets on its entire set of websites (microsoft.com, hotmail, live, etc, all combined), and they have a big server farm running it. That's a lot of requests, and you need to provision your hardware and bandwidth accordingly. D - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Did I find a bug?
Hi, I am having a strange JSP compiler problem. The error message is as follows. First, notice that the lines cocerned are commented out! Still compiler compiling! Second, the second argument of the caller is missing in the error message! ??? === org.apache.jasper.JasperException: Unable to compile class for JSP: An error occurred at line: 70 in the jsp file: /jsp/pdfexample1.jsp The method addCell(Object, Table, int, int, int, int) in the type iTex is not applicable for the arguments (Image, int, int, int, int) 67: 68: 69: 70: // cell = iTex.addCell(Image.getInstance(data), 71: // datatable, iTex.ALIGN_CENTER, iTex.ALIGN_TOP, 2, 1); 72: 73: Stacktrace: org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:85) org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330) org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:415) org.apache.jasper.compiler.Compiler.compile(Compiler.java:308) org.apache.jasper.compiler.Compiler.compile(Compiler.java:286) org.apache.jasper.compiler.Compiler.compile(Compiler.java:273) org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:566) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:308) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266) javax.servlet.http.HttpServlet.service(HttpServlet.java:803) servlets.rme.jspreport.doGet(jspreport.java:23) javax.servlet.http.HttpServlet.service(HttpServlet.java:690) javax.servlet.http.HttpServlet.service(HttpServlet.java:803) -- View this message in context: http://www.nabble.com/Did-I-find-a-bug--tp15113261p15113261.html Sent from the Tomcat - User mailing list archive at Nabble.com. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: find out the possible bottleneck webapp
Hi, What do you mean by SOMETIMES? Is it recurring problem at certain intervals? If it's early-on, it's more likely caused by first time compiling. If it occurs at certain intervals and you use large heap memory, its likely for garbage collection. You can find out the heap memory size allocated and using with Runtime APIS. Regards. Regards. -- View this message in context: http://www.nabble.com/find-out-the-possible-bottleneck-webapp-tp15065234p15114035.html Sent from the Tomcat - User mailing list archive at Nabble.com. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Did I find a bug?
Jonadan wrote: Hi, I am having a strange JSP compiler problem. The error message is as follows. First, notice that the lines cocerned are commented out! Still compiler compiling! Second, the second argument of the caller is missing in the error message! ??? Yes, this is a bug: http://issues.apache.org/bugzilla/show_bug.cgi?id=43757 It is fixed in svn for 5.5.x and 6.0.x and will be in the next release of each. Mark - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: No Authentication Dialog appears for Tomcat Manager
Hi, I just experienced the same problem, found this thread via Google, and figured I'd post my experience and solution. Just like Mark's experience, I installed Tomcat and could not use the manager app because the browser never presented me a dialog box for the username and password. Sure enough, an analysis of the HTTP response headers reveals no WWW-Authenticate header, so the browser is not at fault: HTTP/1.1 401 Server: Apache-Coyote/1.1 Content-Type: text/html;charset=utf-8 Content-Length: 954 Date: Sun, 27 Jan 2008 02:56:12 GMT (Apache Tomcat/6.0.14 - Error report body here...) However, I noticed in my catalina.out numerous exceptions where Tomcat was getting permission denied while attempting to write to files. Sure enough, when I corrected the permissions so that the tomcat user had write permissions to all relevant directories and files, everything started working normally. I can see how the strange behavior of the manager app could be really frustrating and not very helpful, but it turned out to be a pretty mundane problem. David Mark Riggins wrote: Unfortunately, I'm not sure, and I don't know how to recreate the problem. Sorry. Mark David Smith-2 wrote: I'm just wondering if you got a 401 page, but a 200 status or something like that. Maybe one of your customizations did some filtering and/or proxying and changed the response code. Seems like the most reasonable cause of your problem. --David Mark Riggins wrote: It turns out that Netbeans likes to use the Tomcat Manager, so I had to get this working. Since others claimed that it worked out of the box I just uninstalled everything [losing quite a bit of customization] and did a clean vanilla install. Now it works, but I have no idea what caused the problem. This is NOT A BROWSER PROBLEM -- I tried two different browsers before, firefox and IE, neither worked before, and both work now. I too had added another user, so perhaps it has something to do with that. At this point, I'm just glad its working. Fortunately, at this point, I'm just dorking around, refreshing my tech skills, which have gotten a little dusty, so I can easily chuck the whole install and start fresh. Mark wlievens wrote: Mark Riggins wrote: Instead of a basic-authentication dialog box, I get the following error message instead. HTTP Status 401 - type Status report message description This request requires HTTP authentication (). Apache Tomcat/6.0.13 My tomcat-users.xml file looks like this: ?xml version='1.0' encoding='utf-8'? tomcat-users role rolename=tomcat/ role rolename=manager/ role rolename=admin/ user username=tomcat password=tomcat roles=tomcat/ user username=manager password=manager roles=manager/ user username=admin password=admin roles=admin/ /tomcat-users From web.xml I have: !-- Define the Login Configuration for this Application -- login-config auth-methodBASIC/auth-method realm-nameTomcat Manager Application/realm-name /login-config !-- Security roles referenced by this web application -- security-role description The role that is required to log in to the Manager Application /description role-namemanager/role-name /security-role But the dialog NEVER APPEARS. Any help would be greatly appreciated. I can't get ANT to work without this. I have the exact same problem. The only thing I changed in my configuration was adding a user. I never get the dialog prompt. I'd really like a solution for this problem. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: No Authentication Dialog appears for Tomcat Manager
Thanks! Mark David Simmons wrote: Hi, I just experienced the same problem, found this thread via Google, and figured I'd post my experience and solution. Just like Mark's experience, I installed Tomcat and could not use the manager app because the browser never presented me a dialog box for the username and password. Sure enough, an analysis of the HTTP response headers reveals no WWW-Authenticate header, so the browser is not at fault: HTTP/1.1 401 Server: Apache-Coyote/1.1 Content-Type: text/html;charset=utf-8 Content-Length: 954 Date: Sun, 27 Jan 2008 02:56:12 GMT (Apache Tomcat/6.0.14 - Error report body here...) However, I noticed in my catalina.out numerous exceptions where Tomcat was getting permission denied while attempting to write to files. Sure enough, when I corrected the permissions so that the tomcat user had write permissions to all relevant directories and files, everything started working normally. I can see how the strange behavior of the manager app could be really frustrating and not very helpful, but it turned out to be a pretty mundane problem. David Mark Riggins wrote: Unfortunately, I'm not sure, and I don't know how to recreate the problem. Sorry. Mark David Smith-2 wrote: I'm just wondering if you got a 401 page, but a 200 status or something like that. Maybe one of your customizations did some filtering and/or proxying and changed the response code. Seems like the most reasonable cause of your problem. --David Mark Riggins wrote: It turns out that Netbeans likes to use the Tomcat Manager, so I had to get this working. Since others claimed that it worked out of the box I just uninstalled everything [losing quite a bit of customization] and did a clean vanilla install. Now it works, but I have no idea what caused the problem. This is NOT A BROWSER PROBLEM -- I tried two different browsers before, firefox and IE, neither worked before, and both work now. I too had added another user, so perhaps it has something to do with that. At this point, I'm just glad its working. Fortunately, at this point, I'm just dorking around, refreshing my tech skills, which have gotten a little dusty, so I can easily chuck the whole install and start fresh. Mark wlievens wrote: Mark Riggins wrote: Instead of a basic-authentication dialog box, I get the following error message instead. HTTP Status 401 - type Status report message description This request requires HTTP authentication (). Apache Tomcat/6.0.13 My tomcat-users.xml file looks like this: ?xml version='1.0' encoding='utf-8'? tomcat-users role rolename=tomcat/ role rolename=manager/ role rolename=admin/ user username=tomcat password=tomcat roles=tomcat/ user username=manager password=manager roles=manager/ user username=admin password=admin roles=admin/ /tomcat-users From web.xml I have: !-- Define the Login Configuration for this Application -- login-config auth-methodBASIC/auth-method realm-nameTomcat Manager Application/realm-name /login-config !-- Security roles referenced by this web application -- security-role description The role that is required to log in to the Manager Application /description role-namemanager/role-name /security-role But the dialog NEVER APPEARS. Any help would be greatly appreciated. I can't get ANT to work without this. I have the exact same problem. The only thing I changed in my configuration was adding a user. I never get the dialog prompt. I'd really like a solution for this problem. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- View this message in context: http://www.nabble.com/No-Authentication-Dialog-appears-for-Tomcat-Manager-tp14780731p15115906.html Sent from the Tomcat - User mailing list archive at Nabble.com. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat memory leak?
Hi guys, Indeed session disabling did the job. Thanks! - Original Message - From: Christopher Schultz [EMAIL PROTECTED] To: Tomcat Users List users@tomcat.apache.org Sent: Thursday, January 24, 2008 9:26 PM Subject: Re: Tomcat memory leak? -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Ofer, Ofer Kalisky wrote: | That's what I'm saying, I've been sitting on this for two days and can't | figure it out. Does your JSP disable sessions? It's possible that your python script is creating millions of (unused) sessions that don't expire before you bust your heap. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.8 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkeY5k0ACgkQ9CaO5/Lv0PAW9ACeK3nEkRrl3t9gwhu91S28UmnO aMYAoL824Fsk3pmuYWBPIORO54WqnuDG =5J03 -END PGP SIGNATURE- - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Information from ESET NOD32 Antivirus, version of virus signature database 2824 (20080126) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
