On 14.04.2018 17:02, Loai Abdallatif wrote:
HI every one
Im using apache mod-jk with tomcat , i have three workers ( worker0-2) and
each one has app.
I have obtaining webabb called Core from development team. I have placed it
into webapps directory of worker1 . but unfortunatly I got two errors
related to 302, 404, any one can help.
the error is below:
192.168.1.17 - - [14/Apr/2018:19:42:27 +0300] "GET /Core/ HTTP/1.1" 404
1083 "-" "Mozilla/5.0 (Windows NT 6.0) AppleWebKit/537.36 (KHTML, like
Gecko) Chrome/49.0.2623.112 Safari/537.36"
192.168.1.17 - - [14/Apr/2018:19:47:08 +0300] "GET /Core HTTP/1.1" 302 -
"-" "Mozilla/5.0 (Windows NT 6.0) AppleWebKit/537.36 (KHTML, like Gecko)
Chrome/49.0.2623.112 Safari/537.36"
192.168.1.17 - - [14/Apr/2018:19:47:08 +0300] "GET /Core/ HTTP/1.1" 404
1083 "-" "Mozilla/5.0 (Windows NT 6.0) AppleWebKit/537.36 (KHTML, like
Gecko) Chrome/49.0.2623.112 Safari/537.36"
192.168.1.17 - - [14/Apr/2018:19:51:52 +0300] "GET /Core/ HTTP/1.1" 404
1083 "-" "Mozilla/5.0 (Windows NT 6.0) AppleWebKit/537.36 (KHTML, like
Gecko) Chrome/49.0.2623.112 Safari/537.36"
192.168.1.17 - - [14/Apr/2018:19:52:04 +0300] "GET /Core HTTP/1.1" 302 -
"-" "Mozilla/5.0 (Windows NT 6.0) AppleWebKit/537.36 (KHTML, like Gecko)
Chrome/49.0.2623.112 Safari/537.36"
192.168.1.17 - - [14/Apr/2018:19:52:04 +0300] "GET /Core/ HTTP/1.1" 404
1083 "-" "Mozilla/5.0 (Windows NT 6.0) AppleWebKit/537.36 (KHTML, like
Gecko) Chrome/49.0.2623.112 Safari/537.36"
192.168.1.17 - - [14/Apr/2018:19:52:04 +0300] "GET /favicon.ico HTTP/1.1"
404 1085 "http://192.168.1.211:8081/Core/"; "Mozilla/5.0 (Windows NT 6.0)
AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36"
1) Is that log above the Apache httpd access log, or the Tomcat access log ?
2) in any case, you should have a look at the tomcat logs
3) you should also communicate the OS under which this is running, and as a minimum, the
version of Apache httpd, and the version of tomcat. Since you are using mod_jk, the
version of mod_jk would help also (you can find it in the first line printed by Apache
httpd in it's error log).
4) As about the only thing that can be said at this time, with the limited data above, is
this :
if you have 3 workers, in the standard configuration, the Apache httpd-side mod_jk module
will rotate ("round-robin", one request at a time) between these workers, to process
browser requests. If you have only one application under tomcat, it should be installed
*on each of the tomcats*, not just on one. If the application is installed only on one
worker, then 2 requests out of every 3 will fail.
5) also :
- HTTP status code 302 is not an error, it is a "redirect". It happens because the client
is requesting "/Core" instead of "/Core/". Apache httpd automatically sends this redirect
to "/Core/", like to tell the browser that it should speak correctly.
The next request that you see above after the 302, is a correct request for "/Core/", but
it fails (with a 404 "not found" response) because Apache httpd (or tomcat) does not find
the resource corresponding to "/Core/".
That may be for 2 reasons :
a) your mod_jk configuration is incorrect, and Apache httpd does not know that it should
forward this request to tomcat. Httpd them tries to serve it locally, but it does not
have a resource named "/Core/" either, so it returns the 404.
or
b) the request is correctly forwarded by httpd to *one of the tomcat workers*, but that
worker does not have any application matching "/Core/", so it returns a 404 to Apache,
which returns it to the browser.
The 404 return pages of Apache httpd and tomcat have a different style, so you should be
able to see in the browser which one you are getting.
But again, look at the error logs first, both at the Apache httpd level, and
the tomcat level.
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