mod_jk won't start "Error while opening the workers"

[David Esposito <dv...@newnetco.com>]

Howdy all ...

I'm having the strangest problem ... I have had mod_jk (apache connecting to
tomcat) working for the past 2 or 3 months ... however, when i restarted
Apache today, mysteriously i could not get it to restart ...

Platform:
Redhat 7.0
Apache/1.3.12

Here's what I know:

Apache normally will start with or without Tomcat being up ... So most of my
following tests have been without tomcat up ...

I have commented out everything in my httpd.conf related to mod_jk ... When
I do that, Apache starts just fine ...

When I uncomment JUST the "LoadModule" line, I get the following error (in
error_log):
[emerg] (38)Function not implemented: Error while opening the workers

When I uncomment the "LoadModule", "AddModule" and "JKWorkersFile" lines, I
get the following error:
[emerg] (2)No such file or directory: Error while opening the workers

This is the relevant section of my httpd.conf:
LoadModule jk_module modules/mod_jk.so
AddModule mod_jk.c
JkWorkersFile /export/programs/tomcat/conf/workers.properties

So, I've checked and, sure enough, my "workers.properties" exists at that
location ... I've checked the permissions on my mod_jk.so file to make sure
it was the same as all of the other .so files in the modules directory ...
I've tried copying mod_jk.so from a different server to make sure that it
wasn't corrupted ... I've rebooted the server a half dozen times ... I've
shut off just about every other process that I could to make sure nothing
was conflicting ... I've tried adding a JkLogFile directive to httpd.conf to
see if I could get some logging out of the module itself ... nothing was
generated ...

To repeat: this all worked fine about 3 hours ago ... (and it had been
working for the past few months) ... so we're not talking about getting
things setup for the first time ...

Please, someone, say you know what is going on ... ;) ... tell me what to
try ... I have exhausted everything in the book ... next on the list will be
to upgrade apache to see if the problem goes away ... but that is really a
last resort ...

Thanks in advance

-Dave

RE: mod_jk won't start "Error while opening the workers"

[David Esposito <dv...@newnetco.com>]

> -----Original Message-----
> From: jfclere@vtxrm2.bcn.fsc.net [mailto:jfclere@vtxrm2.bcn.fsc.net]On
> Behalf Of jean-frederic clere
> Sent: Thursday, October 11, 2001 4:32 AM
> >
> > This is the relevant section of my httpd.conf:
> > LoadModule jk_module modules/mod_jk.so
> > AddModule mod_jk.c
> > JkWorkersFile /export/programs/tomcat/conf/workers.properties
>
> What about the permissions of the JkWorkersFile...

Permissions are RWX for owner and R for group and other ... (this is the
same as on all of my other servers that have mod_jk up and working)

[root@timqa1 conf]# ls -al workers.properties
-rwxr--r--    1 root     root         5824 Oct  3 15:32 workers.properties

Re: mod_jk won't start "Error while opening the workers"

[jean-frederic clere <jf...@fujitsu-siemens.com>]

David Esposito wrote:
> 
> Howdy all ...
> 
> I'm having the strangest problem ... I have had mod_jk (apache connecting to
> tomcat) working for the past 2 or 3 months ... however, when i restarted
> Apache today, mysteriously i could not get it to restart ...
> 
> Platform:
> Redhat 7.0
> Apache/1.3.12
> 
> Here's what I know:
> 
> Apache normally will start with or without Tomcat being up ... So most of my
> following tests have been without tomcat up ...
> 
> I have commented out everything in my httpd.conf related to mod_jk ... When
> I do that, Apache starts just fine ...
> 
> When I uncomment JUST the "LoadModule" line, I get the following error (in
> error_log):
> [emerg] (38)Function not implemented: Error while opening the workers
> 
> When I uncomment the "LoadModule", "AddModule" and "JKWorkersFile" lines, I
> get the following error:
> [emerg] (2)No such file or directory: Error while opening the workers
> 
> This is the relevant section of my httpd.conf:
> LoadModule jk_module modules/mod_jk.so
> AddModule mod_jk.c
> JkWorkersFile /export/programs/tomcat/conf/workers.properties

What about the permissions of the JkWorkersFile...

> 
> So, I've checked and, sure enough, my "workers.properties" exists at that
> location ... I've checked the permissions on my mod_jk.so file to make sure
> it was the same as all of the other .so files in the modules directory ...
> I've tried copying mod_jk.so from a different server to make sure that it
> wasn't corrupted ... I've rebooted the server a half dozen times ... I've
> shut off just about every other process that I could to make sure nothing
> was conflicting ... I've tried adding a JkLogFile directive to httpd.conf to
> see if I could get some logging out of the module itself ... nothing was
> generated ...
> 
> To repeat: this all worked fine about 3 hours ago ... (and it had been
> working for the past few months) ... so we're not talking about getting
> things setup for the first time ...
> 
> Please, someone, say you know what is going on ... ;) ... tell me what to
> try ... I have exhausted everything in the book ... next on the list will be
> to upgrade apache to see if the problem goes away ... but that is really a
> last resort ...
> 
> Thanks in advance
> 
> -Dave