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Posted to users@tomcat.apache.org by Erik Melkersson <er...@liu.se> on 2007/03/21 09:06:29 UTC
mod_jk/1.2.21, jkstatus does not display runtime state of load balanced
threads, only N/A
Hi!
I've got an apache (1.3.33) with mod_jk (1.2.21) connecting to two
tomcats (5.5.17) on other servers using a load balacer. (All running
debian.) I also have mounted a jkstatus on a directory.
My problem is that the jkstatus is never displaying the runtime state of
the workers. I always get "N/A" in the "Balancer Members" under the
"Stat" column.
I've started it with working tomcats, tomcats blocked by a firewalls and
pointing towards localhost (that doesn't have any tomcats at all) but
all i get is "N/A".
I've read all I could find on http://tomcat.apache.org/connectors-doc/
but without result and no good hits using google. (jkstatus I find, but
info on the state is worse).
Am I missing something obvious somewhere?
I'll paste my settings below in case someone can help me.
Btw: Thanks to the people who wrote and added stuff to:
http://tomcat.apache.org/connectors-doc/generic_howto/loadbalancers.html
Really nice page, setting it up initially worked very well following the
instructions there.
Regards Erik Melkersson
httpd.conf:
**********
LoadModule jk_module /usr/lib/apache/1.3/mod_jk.so
JkWorkersFile conf/workers.properties
JkShmFile logs/httpd/mod_jk.shm
JkLogFile logs/mod_jk.log
JkLogLevel info
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
<Location /test/jkmanager/>
JkMount jkstatus
Order deny,allow
Deny from all
Allow from [nnn.nnn.nnn.nnn]
</Location>
<Location /test/cms/>
SetEnv JK_WORKER_NAME cms
SetHandler jakarta-servlet
ErrorDocument 503 /index-cmsfail.html
</Location>
worker.properties
*****************
worker.list=servlethotel,cms,jkstatus
worker.jkstatus.type=status
worker.servlethotel.type=ajp13
worker.servlethotel.host=nnn.nnn.nnn.nnn
worker.servlethotel.port=8009
worker.servlethotel.socket_timeout=10
worker.cms.type=lb
worker.cms.balance_workers=cmsfront2,cmsfront3
worker.cmsfront2.type=ajp13
worker.cmsfront2.host=nnn.nnn.nnn.nnn
worker.cmsfront2.port=8009
worker.cmsfront2.lbfactor=1
worker.cmsfront2.redirect=cmsfront3
worker.cmsfront3.type=ajp13
worker.cmsfront3.host=nnn.nnn.nnn.nnn
worker.cmsfront3.port=8009
worker.cmsfront3.lbfactor=1
worker.cmsfront3.activation=disabled
# Note: the servlethotel-worker is pointing to another tomcat and
# should not be involved but it is in my file so I let it be there
# for "completeness sake"
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Re: mod_jk/1.2.21, jkstatus does not display runtime state of load
balanced threads, only N/A
Posted by Erik Melkersson <er...@liu.se>.
I have now been able to make it work on another minimalistic server
using the same worker.properties. It displays the runtime state. Now I
"only" have to find out what differs, that makes the status worker fail
getting runtime state. (It's a lot that differs so that may take a long
time :-/ )
Regards Erik Melkersson
Rainer Jung wrote:
> Please open a bugzilla issue ...
>
> Erik Melkersson schrieb:
>> Thanks for the info but unfortunately I don't think that is is case for
>> me. I surfed to a mapped address and got pages back from the tomcat
>> trough the workers and still had N/A as state. I've also used it and got
>> an error message back (both tomcats blocked) but the state was still N/A.
>>
>> As I haven't changed the maintenance interval it should still be 60 secs.
>>
>> Regards Erik Melkersson
>>
>>
>> Rainer Jung wrote:
>>> N/A as a state means, that no requests have been sent to this worker
>>> for some time. So mod_jk is not really able to tell you about the
>>> state of the worker. It can only detect OK, ERROR etc. when it is
>>> sending requests to the workers. No requests, no state.
>>>
>>> A worker will be in state N/A directly after starting Apache or if it
>>> was in state OK, but didn't get any requests during a complete
>>> maintenance interval. This is per default 60 seconds.
>>>
>>> Regards,
>>>
>>> Rainer
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Re: mod_jk/1.2.21, jkstatus does not display runtime state of load
balanced threads, only N/A
Posted by Rainer Jung <ra...@kippdata.de>.
Please open a bugzilla issue and attach the relevant parts of your
mod_jk config (jk directives from httpd.conf and workers.propertiers and
uriworkermap.orperties, if applicable).
Erik Melkersson schrieb:
> Thanks for the info but unfortunately I don't think that is is case for
> me. I surfed to a mapped address and got pages back from the tomcat
> trough the workers and still had N/A as state. I've also used it and got
> an error message back (both tomcats blocked) but the state was still N/A.
>
> As I haven't changed the maintenance interval it should still be 60 secs.
>
> Regards Erik Melkersson
>
>
> Rainer Jung wrote:
>> N/A as a state means, that no requests have been sent to this worker
>> for some time. So mod_jk is not really able to tell you about the
>> state of the worker. It can only detect OK, ERROR etc. when it is
>> sending requests to the workers. No requests, no state.
>>
>> A worker will be in state N/A directly after starting Apache or if it
>> was in state OK, but didn't get any requests during a complete
>> maintenance interval. This is per default 60 seconds.
>>
>> Regards,
>>
>> Rainer
>
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Re: mod_jk/1.2.21, jkstatus does not display runtime state of load
balanced threads, only N/A
Posted by Erik Melkersson <er...@liu.se>.
Thanks for the info but unfortunately I don't think that is is case for
me. I surfed to a mapped address and got pages back from the tomcat
trough the workers and still had N/A as state. I've also used it and got
an error message back (both tomcats blocked) but the state was still N/A.
As I haven't changed the maintenance interval it should still be 60 secs.
Regards Erik Melkersson
Rainer Jung wrote:
> N/A as a state means, that no requests have been sent to this worker for
> some time. So mod_jk is not really able to tell you about the state of
> the worker. It can only detect OK, ERROR etc. when it is sending
> requests to the workers. No requests, no state.
>
> A worker will be in state N/A directly after starting Apache or if it
> was in state OK, but didn't get any requests during a complete
> maintenance interval. This is per default 60 seconds.
>
> Regards,
>
> Rainer
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Re: mod_jk/1.2.21, jkstatus does not display runtime state of load
balanced threads, only N/A
Posted by Rainer Jung <ra...@kippdata.de>.
N/A as a state means, that no requests have been sent to this worker for
some time. So mod_jk is not really able to tell you about the state of
the worker. It can only detect OK, ERROR etc. when it is sending
requests to the workers. No requests, no state.
A worker will be in state N/A directly after starting Apache or if it
was in state OK, but didn't get any requests during a complete
maintenance interval. This is per default 60 seconds.
Regards,
Rainer
Erik Melkersson wrote:
> Does anyone recognize my problem about the runtime state that never is
> displayed or did it work for you out-of-the-box?
>
> Regards Erik Melkersson
>
> Erik Melkersson wrote:
>> Hi!
>> I've got an apache (1.3.33) with mod_jk (1.2.21) connecting to two
>> tomcats (5.5.17) on other servers using a load balacer. (All running
>> debian.) I also have mounted a jkstatus on a directory.
>>
>> My problem is that the jkstatus is never displaying the runtime state
>> of the workers. I always get "N/A" in the "Balancer Members" under the
>> "Stat" column.
>>
>> I've started it with working tomcats, tomcats blocked by a firewalls
>> and pointing towards localhost (that doesn't have any tomcats at all)
>> but all i get is "N/A".
>>
>> ...
>>
>> worker.properties
>> *****************
>> worker.list=cms,jkstatus
>>
>> worker.jkstatus.type=status
>>
>> worker.cms.type=lb
>> worker.cms.balance_workers=cmsfront2,cmsfront3
>>
>> worker.cmsfront2.type=ajp13
>> worker.cmsfront2.host=nnn.nnn.nnn.nnn
>> worker.cmsfront2.port=8009
>> worker.cmsfront2.lbfactor=1
>> worker.cmsfront2.redirect=cmsfront3
>>
>> worker.cmsfront3.type=ajp13
>> worker.cmsfront3.host=nnn.nnn.nnn.nnn
>> worker.cmsfront3.port=8009
>> worker.cmsfront3.lbfactor=1
>> worker.cmsfront3.activation=disabled
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Re: mod_jk/1.2.21, jkstatus does not display runtime state of load
balanced threads, only N/A
Posted by Erik Melkersson <er...@liu.se>.
Does anyone recognize my problem about the runtime state that never is
displayed or did it work for you out-of-the-box?
Regards Erik Melkersson
Erik Melkersson wrote:
> Hi!
> I've got an apache (1.3.33) with mod_jk (1.2.21) connecting to two
> tomcats (5.5.17) on other servers using a load balacer. (All running
> debian.) I also have mounted a jkstatus on a directory.
>
> My problem is that the jkstatus is never displaying the runtime state of
> the workers. I always get "N/A" in the "Balancer Members" under the
> "Stat" column.
>
> I've started it with working tomcats, tomcats blocked by a firewalls and
> pointing towards localhost (that doesn't have any tomcats at all) but
> all i get is "N/A".
>
> ...
>
> worker.properties
> *****************
> worker.list=cms,jkstatus
>
> worker.jkstatus.type=status
>
> worker.cms.type=lb
> worker.cms.balance_workers=cmsfront2,cmsfront3
>
> worker.cmsfront2.type=ajp13
> worker.cmsfront2.host=nnn.nnn.nnn.nnn
> worker.cmsfront2.port=8009
> worker.cmsfront2.lbfactor=1
> worker.cmsfront2.redirect=cmsfront3
>
> worker.cmsfront3.type=ajp13
> worker.cmsfront3.host=nnn.nnn.nnn.nnn
> worker.cmsfront3.port=8009
> worker.cmsfront3.lbfactor=1
> worker.cmsfront3.activation=disabled
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