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Posted to users@httpd.apache.org by Mohit Anchlia <mo...@gmail.com> on 2010/11/20 06:09:08 UTC
[users@httpd] Mod-jk worker not being called after calling handler
I am trying to look at how handlers work so I created a very simple
perl handler that just return "OK". And I added an entry "PerlModule"
and the "PerlHandler". I also was able to build mod_perl2.so. When I
do a GET request with handler ON I see that Handler gets called but
then the call is not going further to the mod-jk worker. Can someone
please tell me what might be going on? I thought OK will continue down
the cycle.
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Re: [users@httpd] Mod-jk worker not being called after calling handler
Posted by Mohit Anchlia <mo...@gmail.com>.
On Sat, Nov 20, 2010 at 3:05 AM, Eric Covener <co...@gmail.com> wrote:
> On Sat, Nov 20, 2010 at 12:09 AM, Mohit Anchlia <mo...@gmail.com> wrote:
>> I am trying to look at how handlers work so I created a very simple
>> perl handler that just return "OK". And I added an entry "PerlModule"
>> and the "PerlHandler". I also was able to build mod_perl2.so. When I
>> do a GET request with handler ON I see that Handler gets called but
>> then the call is not going further to the mod-jk worker. Can someone
>> please tell me what might be going on? I thought OK will continue down
>> the cycle.
>
> you have to return DECLINED if you want to let someone else to run
> hooks like handler.
>
Thanks! would the behaviour be any different if I used PostReadRequest
or Perl Content Handler? I will try using DECLINED and see if mod-jk
worker is called.
> --
> Eric Covener
> covener@gmail.com
>
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Re: [users@httpd] Mod-jk worker not being called after calling handler
Posted by Rainer Jung <ra...@kippdata.de>.
On 23.11.2010 18:58, Mohit Anchlia wrote:
> On Mon, Nov 22, 2010 at 4:16 PM, Mohit Anchlia<mo...@gmail.com> wrote:
>> On Mon, Nov 22, 2010 at 9:54 AM, Mohit Anchlia<mo...@gmail.com> wrote:
>>> On Sat, Nov 20, 2010 at 3:05 AM, Eric Covener<co...@gmail.com> wrote:
>>>> On Sat, Nov 20, 2010 at 12:09 AM, Mohit Anchlia<mo...@gmail.com> wrote:
>>>>> I am trying to look at how handlers work so I created a very simple
>>>>> perl handler that just return "OK". And I added an entry "PerlModule"
>>>>> and the "PerlHandler". I also was able to build mod_perl2.so. When I
>>>>> do a GET request with handler ON I see that Handler gets called but
>>>>> then the call is not going further to the mod-jk worker. Can someone
>>>>> please tell me what might be going on? I thought OK will continue down
>>>>> the cycle.
>>>>
>>>> you have to return DECLINED if you want to let someone else to run
>>>> hooks like handler.
>>>
>>> I tried
>>>
>>> package Apache2::Rules2;
>>> #use lib '/home/.mohit/mod_perl-2.0.4/lib';
>>> use Apache2::Const qw(:common);
>>> use Apache2::RequestRec ();
>>> use Apache2::RequestIO ();
>>> sub handler {
>>> my $r = shift;
>>> #$r->content_type('text/plain');
>>> #$r->print("mod_perl rules!\n");
>>> return DECLINE; # We must return a status to mod_perl
>>> }
>>> 1; # This is a perl module so we must return true to perl
>>>
>>> But even though I am using DECLINE it doesn't continue going to
>>> mod-jk. Handler just becomes the final destination in this case. How
>>> can I write handler such that it continues sending request to mod-jk.
>>>
>>> In virtual host I added this:
>>>
>>>
>>> PerlModule Apache2::Rules2
>>> SetHandler perl-script
>>> PerlHandler Apache2::Rules2
>>> PerlSendHeader On
>>>
>>
>> I now changed it to DECLINED. Now it tries to forward the request but
>> looks like instead of forwarding it to mod-jk worker it is trying to
>> locate document on the same web server.
>>
>>
>> http://ws1/bridge/e?val
>> HTTP request sent, awaiting response... 404 Not Found
>> 16:11:45 ERROR 404: Not Found.
>>
>> In access logs it says e?val not found. It's supposed to forward this
>> request to mod_jk worker. Because bridge is a servlet in jboss app
>> server and apache sends it using mod_jk.
>
> Can someone advise why it's not going to mod_jk? How do I debug this?
There is often some confusion about the words handler and hooks. Of all
the hooks provided by Apache, the handler responsible for actually
providing the content of the response (mod_perl: PerlResponseHandler)
behaves in a special way. If returning DECLINED, Apache will not call
another such handler but instead return an error message. If a handler
really wants to let another handler answer the request (which is not
typical), it needs to invoke an internal_redirect. I don't know whether
mod_perl supports that.
It is not unlikely that any steps used to prepare the final content
generation are better to moved to one or several of the numerous other
hooks.
The use of "PerlHandler" in your configuration suggests, that you should
read a bit more about how to use mod_perl. That diractive is only there
for 1.0 compatibility reasons. If you start out something new, you
shouldn't use it.
Pointers are:
http://perl.apache.org/docs/2.0/user/handlers/intro.html
and
http://perl.apache.org/docs/2.0/user/
in general, as well as
http://modules.apache.org/doc/API.html
Regards,
Rainer
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Re: [users@httpd] Mod-jk worker not being called after calling handler
Posted by Mohit Anchlia <mo...@gmail.com>.
On Mon, Nov 22, 2010 at 4:16 PM, Mohit Anchlia <mo...@gmail.com> wrote:
> On Mon, Nov 22, 2010 at 9:54 AM, Mohit Anchlia <mo...@gmail.com> wrote:
>> On Sat, Nov 20, 2010 at 3:05 AM, Eric Covener <co...@gmail.com> wrote:
>>> On Sat, Nov 20, 2010 at 12:09 AM, Mohit Anchlia <mo...@gmail.com> wrote:
>>>> I am trying to look at how handlers work so I created a very simple
>>>> perl handler that just return "OK". And I added an entry "PerlModule"
>>>> and the "PerlHandler". I also was able to build mod_perl2.so. When I
>>>> do a GET request with handler ON I see that Handler gets called but
>>>> then the call is not going further to the mod-jk worker. Can someone
>>>> please tell me what might be going on? I thought OK will continue down
>>>> the cycle.
>>>
>>> you have to return DECLINED if you want to let someone else to run
>>> hooks like handler.
>>
>> I tried
>>
>> package Apache2::Rules2;
>> #use lib '/home/.mohit/mod_perl-2.0.4/lib';
>> use Apache2::Const qw(:common);
>> use Apache2::RequestRec ();
>> use Apache2::RequestIO ();
>> sub handler {
>> my $r = shift;
>> #$r->content_type('text/plain');
>> #$r->print("mod_perl rules!\n");
>> return DECLINE; # We must return a status to mod_perl
>> }
>> 1; # This is a perl module so we must return true to perl
>>
>> But even though I am using DECLINE it doesn't continue going to
>> mod-jk. Handler just becomes the final destination in this case. How
>> can I write handler such that it continues sending request to mod-jk.
>>
>> In virtual host I added this:
>>
>>
>> PerlModule Apache2::Rules2
>> SetHandler perl-script
>> PerlHandler Apache2::Rules2
>> PerlSendHeader On
>>
>
> I now changed it to DECLINED. Now it tries to forward the request but
> looks like instead of forwarding it to mod-jk worker it is trying to
> locate document on the same web server.
>
>
> http://ws1/bridge/e?val
> HTTP request sent, awaiting response... 404 Not Found
> 16:11:45 ERROR 404: Not Found.
>
> In access logs it says e?val not found. It's supposed to forward this
> request to mod_jk worker. Because bridge is a servlet in jboss app
> server and apache sends it using mod_jk.
Can someone advise why it's not going to mod_jk? How do I debug this?
>>>
>>> --
>>> Eric Covener
>>> covener@gmail.com
>>>
>>> ---------------------------------------------------------------------
>>> The official User-To-User support forum of the Apache HTTP Server Project.
>>> See <URL:http://httpd.apache.org/userslist.html> for more info.
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>>>
>>>
>>
>
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Re: [users@httpd] Mod-jk worker not being called after calling handler
Posted by Mohit Anchlia <mo...@gmail.com>.
On Mon, Nov 22, 2010 at 9:54 AM, Mohit Anchlia <mo...@gmail.com> wrote:
> On Sat, Nov 20, 2010 at 3:05 AM, Eric Covener <co...@gmail.com> wrote:
>> On Sat, Nov 20, 2010 at 12:09 AM, Mohit Anchlia <mo...@gmail.com> wrote:
>>> I am trying to look at how handlers work so I created a very simple
>>> perl handler that just return "OK". And I added an entry "PerlModule"
>>> and the "PerlHandler". I also was able to build mod_perl2.so. When I
>>> do a GET request with handler ON I see that Handler gets called but
>>> then the call is not going further to the mod-jk worker. Can someone
>>> please tell me what might be going on? I thought OK will continue down
>>> the cycle.
>>
>> you have to return DECLINED if you want to let someone else to run
>> hooks like handler.
>
> I tried
>
> package Apache2::Rules2;
> #use lib '/home/.mohit/mod_perl-2.0.4/lib';
> use Apache2::Const qw(:common);
> use Apache2::RequestRec ();
> use Apache2::RequestIO ();
> sub handler {
> my $r = shift;
> #$r->content_type('text/plain');
> #$r->print("mod_perl rules!\n");
> return DECLINE; # We must return a status to mod_perl
> }
> 1; # This is a perl module so we must return true to perl
>
> But even though I am using DECLINE it doesn't continue going to
> mod-jk. Handler just becomes the final destination in this case. How
> can I write handler such that it continues sending request to mod-jk.
>
> In virtual host I added this:
>
>
> PerlModule Apache2::Rules2
> SetHandler perl-script
> PerlHandler Apache2::Rules2
> PerlSendHeader On
>
I now changed it to DECLINED. Now it tries to forward the request but
looks like instead of forwarding it to mod-jk worker it is trying to
locate document on the same web server.
http://ws1/bridge/e?val
HTTP request sent, awaiting response... 404 Not Found
16:11:45 ERROR 404: Not Found.
In access logs it says e?val not found. It's supposed to forward this
request to mod_jk worker. Because bridge is a servlet in jboss app
server and apache sends it using mod_jk.
>>
>> --
>> Eric Covener
>> covener@gmail.com
>>
>> ---------------------------------------------------------------------
>> The official User-To-User support forum of the Apache HTTP Server Project.
>> See <URL:http://httpd.apache.org/userslist.html> for more info.
>> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
>> " from the digest: users-digest-unsubscribe@httpd.apache.org
>> For additional commands, e-mail: users-help@httpd.apache.org
>>
>>
>
---------------------------------------------------------------------
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Re: [users@httpd] Mod-jk worker not being called after calling handler
Posted by Mohit Anchlia <mo...@gmail.com>.
On Sat, Nov 20, 2010 at 3:05 AM, Eric Covener <co...@gmail.com> wrote:
> On Sat, Nov 20, 2010 at 12:09 AM, Mohit Anchlia <mo...@gmail.com> wrote:
>> I am trying to look at how handlers work so I created a very simple
>> perl handler that just return "OK". And I added an entry "PerlModule"
>> and the "PerlHandler". I also was able to build mod_perl2.so. When I
>> do a GET request with handler ON I see that Handler gets called but
>> then the call is not going further to the mod-jk worker. Can someone
>> please tell me what might be going on? I thought OK will continue down
>> the cycle.
>
> you have to return DECLINED if you want to let someone else to run
> hooks like handler.
I tried
package Apache2::Rules2;
#use lib '/home/.mohit/mod_perl-2.0.4/lib';
use Apache2::Const qw(:common);
use Apache2::RequestRec ();
use Apache2::RequestIO ();
sub handler {
my $r = shift;
#$r->content_type('text/plain');
#$r->print("mod_perl rules!\n");
return DECLINE; # We must return a status to mod_perl
}
1; # This is a perl module so we must return true to perl
But even though I am using DECLINE it doesn't continue going to
mod-jk. Handler just becomes the final destination in this case. How
can I write handler such that it continues sending request to mod-jk.
In virtual host I added this:
PerlModule Apache2::Rules2
SetHandler perl-script
PerlHandler Apache2::Rules2
PerlSendHeader On
>
> --
> Eric Covener
> covener@gmail.com
>
> ---------------------------------------------------------------------
> The official User-To-User support forum of the Apache HTTP Server Project.
> See <URL:http://httpd.apache.org/userslist.html> for more info.
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> " from the digest: users-digest-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>
>
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Re: [users@httpd] Mod-jk worker not being called after calling handler
Posted by Eric Covener <co...@gmail.com>.
On Sat, Nov 20, 2010 at 12:09 AM, Mohit Anchlia <mo...@gmail.com> wrote:
> I am trying to look at how handlers work so I created a very simple
> perl handler that just return "OK". And I added an entry "PerlModule"
> and the "PerlHandler". I also was able to build mod_perl2.so. When I
> do a GET request with handler ON I see that Handler gets called but
> then the call is not going further to the mod-jk worker. Can someone
> please tell me what might be going on? I thought OK will continue down
> the cycle.
you have to return DECLINED if you want to let someone else to run
hooks like handler.
--
Eric Covener
covener@gmail.com
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Re: [users@httpd] Mod-jk worker not being called after calling handler
Posted by "William A. Rowe Jr." <wr...@rowe-clan.net>.
On 11/19/2010 11:09 PM, Mohit Anchlia wrote:
> I am trying to look at how handlers work so I created a very simple
> perl handler that just return "OK". And I added an entry "PerlModule"
> and the "PerlHandler". I also was able to build mod_perl2.so. When I
> do a GET request with handler ON I see that Handler gets called but
> then the call is not going further to the mod-jk worker. Can someone
> please tell me what might be going on? I thought OK will continue down
> the cycle.
There is one and only one handler. If you registered for it, you are it.
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