DO NOT REPLY [Bug 14405] - Tomcat uses 90% of CPU
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405. ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND INSERTED IN THE BUG DATABASE. http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405 Tomcat uses 90% of CPU [EMAIL PROTECTED] changed: What|Removed |Added Status|NEW |RESOLVED Resolution||WONTFIX --- Additional Comments From [EMAIL PROTECTED] 2004-03-07 07:17 --- AJP12 is nolonger actively supported. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
DO NOT REPLY [Bug 14405] - Tomcat uses 90% of CPU
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405. ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND INSERTED IN THE BUG DATABASE. http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405 Tomcat uses 90% of CPU --- Additional Comments From [EMAIL PROTECTED] 2002-11-11 09:03 --- It seems to be a problem with your web application. Could you tell use what it does and use (jdbc connections, kind of SQL database). Could you try it on another platform with another SDK (ie an IBM SDK) ? -- To unsubscribe, e-mail: mailto:tomcat-dev-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-dev-help;jakarta.apache.org
DO NOT REPLY [Bug 14405] - Tomcat uses 90% of CPU
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405
Tomcat uses 90% of CPU
--- Additional Comments From [EMAIL PROTECTED] 2002-11-11 09:52 ---
Thankx a lot for your prompt response.
Yes..we are using oracle database in solaris 2.8. We do not see any i/o wait or
swapping. I read a couple of articles in mailing lists. They claim that, mod_jk
might run into a race condition when tomcat is not able to respond for whatever
reason.
We are also using mod_jk which was shipped with tomact 3.2.1. We use this for
tomcat 3.3 with ajp12 protocol.
From the mailing list, i got the following code.
static int ajpv12_handle_response(ajp12_endpoint_t *p,
jk_ws_service_t *s,
jk_logger_t *l)
{
while(1) {
unsigned to_read = READ_BUF_SIZE;
unsigned acc = 0;
char *buf = NULL;
if(!jk_sb_read(p-sb, buf, to_read, acc)) {
jk_log(l, JK_LOG_ERROR, ajpv12_handle_response, error
reading
from \n); return JK_FALSE;
}
if(!acc) {
jk_log(l, JK_LOG_DEBUG, ajpv12_handle_response, response
body is
done\n); break;
}
if(write_to_ws) {
if(!s-write(s, buf, acc)) {
jk_log(l, JK_LOG_ERROR, ajpv12_handle_response, error
writing back to server\n); write_to_ws = JK_FALSE;HERE
}
}
}
I could see ajpv12_handle_response, error writing back to server in the
mod_jk logs.
My question is :
- At what condition this will run into a race condition
- Do we need to upgrade to mod_jk that is shipped with tomcat 3.3
- What causes this error to happen?
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Re: DO NOT REPLY [Bug 14405] - Tomcat uses 90% of CPU
[EMAIL PROTECTED] wrote: DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405. ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND INSERTED IN THE BUG DATABASE. http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405 Tomcat uses 90% of CPU --- Additional Comments From [EMAIL PROTECTED] 2002-11-11 09:53 --- Please have a look at the following link to know more about the mod_jk bug. http://marc.theaimsgroup.com/?l=tomcat-userm=99112351628144w=2 -- To unsubscribe, e-mail: mailto:tomcat-dev-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-dev-help;jakarta.apache.org ajp12 is deprecated and you should consider switching to ajp13 -- To unsubscribe, e-mail: mailto:tomcat-dev-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-dev-help;jakarta.apache.org
DO NOT REPLY [Bug 14405] - Tomcat uses 90% of CPU
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405. ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND INSERTED IN THE BUG DATABASE. http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405 Tomcat uses 90% of CPU --- Additional Comments From [EMAIL PROTECTED] 2002-11-09 08:00 --- It's in the directory that Tomcat was started from (assuming that the user that Tomcat is running under has write-permissions to that directory). I think that under the Sun JVM, it goes to stderr otherwise. The kill -3 doesn't actually kill the JVM, it just tells it to dump the javacore file that says what it is doing at that particular moment. -- To unsubscribe, e-mail: mailto:tomcat-dev-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-dev-help;jakarta.apache.org
DO NOT REPLY [Bug 14405] - Tomcat uses 90% of CPU
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405. ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND INSERTED IN THE BUG DATABASE. http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405 Tomcat uses 90% of CPU --- Additional Comments From [EMAIL PROTECTED] 2002-11-09 06:30 --- At a guess, it is either GC or JIT kicking in (the second should be considered normal, and is the most likely if leaving the machine alone, the load drops and stays down). If it is a persistant GC problem, then you'll likely have to review your webapp code. Without more information (e.g. a test case), this is likely to get marked as INVALID once there is a release plan for 3.3.2. -- To unsubscribe, e-mail: mailto:tomcat-dev-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-dev-help;jakarta.apache.org
DO NOT REPLY [Bug 14405] - Tomcat uses 90% of CPU
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405. ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND INSERTED IN THE BUG DATABASE. http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405 Tomcat uses 90% of CPU --- Additional Comments From [EMAIL PROTECTED] 2002-11-09 06:35 --- GC is not a problem in our case. I tried with -verbose:gc option. Its not taking much time. We have set the following parameters -XX:PermSize=64M -xms:256Mb -xmx:778Mb. All these parameters are used by JVM hotspot and moreover we run tomcat in -server mode of JVM. We considered resizing heap size also. But didn't help much. We don't have a exact test case as to reproduce the problem -- To unsubscribe, e-mail: mailto:tomcat-dev-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-dev-help;jakarta.apache.org
DO NOT REPLY [Bug 14405] - Tomcat uses 90% of CPU
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405. ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND INSERTED IN THE BUG DATABASE. http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405 Tomcat uses 90% of CPU --- Additional Comments From [EMAIL PROTECTED] 2002-11-09 07:04 --- As I've hinted before, I've seen spikes in usage shortly after restarting on Solaris systems due to hotspot's JIT. In my case, it is usually 20min, but your mileage may vary depending on what your webapp does. Without a test case, my best advice is to leave it up for at least 30min when this happens. If the load doesn't drop, then do a kill -3 `cat $TOMCAT_HOME/logs/tomcat.pid` and post the javacore file as an attachment to this bug. -- To unsubscribe, e-mail: mailto:tomcat-dev-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-dev-help;jakarta.apache.org
DO NOT REPLY [Bug 14405] - Tomcat uses 90% of CPU
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405. ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND INSERTED IN THE BUG DATABASE. http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14405 Tomcat uses 90% of CPU --- Additional Comments From [EMAIL PROTECTED] 2002-11-09 07:27 --- Sorry about this silly question. i did a 'ps -ef | grep java' and found out the process id of tomcat and after that i ran kill -3 'pid of tomcat' . It didn't create a coredump. And also it didn't kill the java process. Where will the coredump file would be generated?. It would be great if you could guide me on this. -- To unsubscribe, e-mail: mailto:tomcat-dev-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-dev-help;jakarta.apache.org
