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Posted to users@tomcat.apache.org by Geett Chanddra Singha <ge...@gmail.com> on 2013/03/06 05:45:42 UTC

Issue in IPv6 evironment

Hi All,

I am using Apache Tomcat version 6.0.035 for a web application, everything
seems to be working fine when I access the application in HTTPS
mode,however if I try to access in HTTP mode, I am not able launch home
page of web application.As a workaround I made a small change as
highlighted in red color in server.xml as given below:

<Connector port="8080" maxHttpHeaderSize="8192" *
protocol="org.apache.coyote.http11.Http11Protocol"*
               maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
               enableLookups="false"  acceptCount="100"
               connectionTimeout="20000" disableUploadTimeout="true" />

So I would like to know is it ok add mentioned parameter to server.xml.

-- 
Thanks & Regards
Geett Chanddra Singha

Re: Issue in IPv6 evironment

Posted by Geett Chanddra Singha <ge...@gmail.com>.

Thanks Ognjen! for your debugging tips.

I shall provide you information.

My apologies for not providing enough information to you.
Next time I shall come up with more information :)

On Thu, Mar 7, 2013 at 2:22 AM, Ognjen Blagojevic <
ognjen.d.blagojevic@gmail.com> wrote:

> Geett,
>
>
> On 6.3.2013 15:14, Geett Chanddra Singha wrote:
>
>> Right? What about IPv4? Do you use it? Is it similar situation when you
>> use
>> IPv4 (works only when you add "protocol" attribute)? Are you sure that
>> IPv6
>> protocol is being used? Do you access your server using hostname or IP
>> address?
>> ------------------------------**------------------------------**
>> ------------------------------**------------------------------**
>> ----------------
>>
>> Your are right, the same change works for IPv4 environment (i.e. RHEL)
>>
>
> (Sigh) So many questions, so few answers.
>
>
>
>  2. Your access to HTTP might be blocked due to:
>>
>> a. Wrong URL (you must use port 8080)
>>
>> b. Network/OS firewall (port 8080 is blocked) -- check with telnet
>> server.example.com 8080, does it work? Repeat the same using IPv6
>> address,
>> does it work?
>>
>> c. Tomcat not starting on port 8080 -- check log files for entry 'INFO:
>> Initializing ProtocolHandler ["http-bio-8080"]', are there any errors? If
>> log files look OK, and they have no errors, also check access log. Do you
>> see entry for requested URL there? What does it look like?
>> ------------------------------**------------------------------**
>> ------------------------------**------------------------------**
>> ------------------------------**------------------------------**
>> ---------------
>> Since , the same change works for IPv4 environment (i.e. RHEL), we don't
>> have issues mentioned.
>>
>> So I would like to know whether the change can be incorporated to
>> server.xml, if not please let me know solution/workaround.
>>
>
> In order to try to find the solution for your problem, we must first
> diagnose what exactly is the problem, and why can't you access Tomcat when
> there is no protocol attribute specified in the connector.
>
> Adding attribute protocol="org.apache.coyote.**http11.Http11Protocol" to
> HTTP connector would only make a difference if you have APR/native
> connector installed (perhaps faulty). Did you install it?
>
> That is why I would like to see your Tomcat startup logs WITH and WITHOUT
> protocol attribute. We are looking for something like this:
>
>   Mar 01, 2013 01:02:03 AM org.apache.coyote.**AbstractProtocol start
>   INFO: Starting ProtocolHandler ["http-apr/bio-8080"]
>
> Could you please provide log contents for both cases.
>
>
> -Ognjen
>
> ------------------------------**------------------------------**---------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.**apache.org<us...@tomcat.apache.org>
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>


-- 
Thanks & Regards
Geett Chanddra Singha

Re: Issue in IPv6 evironment

Posted by Ognjen Blagojevic <og...@gmail.com>.

Geett,

On 6.3.2013 15:14, Geett Chanddra Singha wrote:
> Right? What about IPv4? Do you use it? Is it similar situation when you use
> IPv4 (works only when you add "protocol" attribute)? Are you sure that IPv6
> protocol is being used? Do you access your server using hostname or IP
> address?
> ----------------------------------------------------------------------------------------------------------------------------------------
>
> Your are right, the same change works for IPv4 environment (i.e. RHEL)

(Sigh) So many questions, so few answers.


> 2. Your access to HTTP might be blocked due to:
>
> a. Wrong URL (you must use port 8080)
>
> b. Network/OS firewall (port 8080 is blocked) -- check with telnet
> server.example.com 8080, does it work? Repeat the same using IPv6 address,
> does it work?
>
> c. Tomcat not starting on port 8080 -- check log files for entry 'INFO:
> Initializing ProtocolHandler ["http-bio-8080"]', are there any errors? If
> log files look OK, and they have no errors, also check access log. Do you
> see entry for requested URL there? What does it look like?
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> Since , the same change works for IPv4 environment (i.e. RHEL), we don't
> have issues mentioned.
>
> So I would like to know whether the change can be incorporated to
> server.xml, if not please let me know solution/workaround.

In order to try to find the solution for your problem, we must first 
diagnose what exactly is the problem, and why can't you access Tomcat 
when there is no protocol attribute specified in the connector.

Adding attribute protocol="org.apache.coyote.http11.Http11Protocol" to 
HTTP connector would only make a difference if you have APR/native 
connector installed (perhaps faulty). Did you install it?

That is why I would like to see your Tomcat startup logs WITH and 
WITHOUT protocol attribute. We are looking for something like this:

   Mar 01, 2013 01:02:03 AM org.apache.coyote.AbstractProtocol start
   INFO: Starting ProtocolHandler ["http-apr/bio-8080"]

Could you please provide log contents for both cases.

-Ognjen

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Re: Issue in IPv6 evironment

Posted by Geett Chanddra Singha <ge...@gmail.com>.

Thanks Ognjen!

1. Did I understand correctly:

- You are able to access your Tomcat server using HTTPS over IPv6.

- If you do not add "protocol" attribute to your HTTP connector, you are
unable to access Tomcat server using HTTP.

- After you add "protocol" attribute everything works as expected.

Right? What about IPv4? Do you use it? Is it similar situation when you use
IPv4 (works only when you add "protocol" attribute)? Are you sure that IPv6
protocol is being used? Do you access your server using hostname or IP
address?
----------------------------------------------------------------------------------------------------------------------------------------

Your are right, the same change works for IPv4 environment (i.e. RHEL)


2. Your access to HTTP might be blocked due to:

a. Wrong URL (you must use port 8080)

b. Network/OS firewall (port 8080 is blocked) -- check with telnet
server.example.com 8080, does it work? Repeat the same using IPv6 address,
does it work?

c. Tomcat not starting on port 8080 -- check log files for entry 'INFO:
Initializing ProtocolHandler ["http-bio-8080"]', are there any errors? If
log files look OK, and they have no errors, also check access log. Do you
see entry for requested URL there? What does it look like?
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Since , the same change works for IPv4 environment (i.e. RHEL), we don't
have issues mentioned.

So I would like to know whether the change can be incorporated to
server.xml, if not please let me know solution/workaround.

Regards,
Geett

On Wed, Mar 6, 2013 at 4:42 PM, Ognjen Blagojevic <
ognjen.d.blagojevic@gmail.com> wrote:

> Geett,
>
>
> On 6.3.2013 11:37, Geett Chanddra Singha wrote:
>
>> - what version of Tomcat (x.y.z) you are using
>>    - *Tomcat Version 6.0.035*
>>
>>
>> - under what version of Java
>>    - *Java version 1.6.033*
>> *
>>
>> *
>> - under what platform O.S.
>>   - *Windows and Linux*
>>
>
>
> 1. Did I understand correctly:
>
> - You are able to access your Tomcat server using HTTPS over IPv6.
>
> - If you do not add "protocol" attribute to your HTTP connector, you are
> unable to access Tomcat server using HTTP.
>
> - After you add "protocol" attribute everything works as expected.
>
> Right? What about IPv4? Do you use it? Is it similar situation when you
> use IPv4 (works only when you add "protocol" attribute)? Are you sure that
> IPv6 protocol is being used? Do you access your server using hostname or IP
> address?
>
>
> 2. Your access to HTTP might be blocked due to:
>
> a. Wrong URL (you must use port 8080)
>
> b. Network/OS firewall (port 8080 is blocked) -- check with telnet
> server.example.com 8080, does it work? Repeat the same using IPv6
> address, does it work?
>
> c. Tomcat not starting on port 8080 -- check log files for entry 'INFO:
> Initializing ProtocolHandler ["http-bio-8080"]', are there any errors? If
> log files look OK, and they have no errors, also check access log. Do you
> see entry for requested URL there? What does it look like?
>
> -Ognjen
>
>
> ------------------------------**------------------------------**---------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.**apache.org<us...@tomcat.apache.org>
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>


-- 
Thanks & Regards
Geett Chanddra Singha

Re: Issue in IPv6 evironment

Posted by Ognjen Blagojevic <og...@gmail.com>.

Geett,

On 6.3.2013 11:37, Geett Chanddra Singha wrote:
> - what version of Tomcat (x.y.z) you are using
>    - *Tomcat Version 6.0.035*
>
> - under what version of Java
>    - *Java version 1.6.033*
> *
> *
> - under what platform O.S.
>   - *Windows and Linux*

1. Did I understand correctly:

- You are able to access your Tomcat server using HTTPS over IPv6.

- If you do not add "protocol" attribute to your HTTP connector, you are 
unable to access Tomcat server using HTTP.

- After you add "protocol" attribute everything works as expected.

Right? What about IPv4? Do you use it? Is it similar situation when you 
use IPv4 (works only when you add "protocol" attribute)? Are you sure 
that IPv6 protocol is being used? Do you access your server using 
hostname or IP address?

2. Your access to HTTP might be blocked due to:

a. Wrong URL (you must use port 8080)

b. Network/OS firewall (port 8080 is blocked) -- check with telnet 
server.example.com 8080, does it work? Repeat the same using IPv6 
address, does it work?

c. Tomcat not starting on port 8080 -- check log files for entry 'INFO: 
Initializing ProtocolHandler ["http-bio-8080"]', are there any errors? 
If log files look OK, and they have no errors, also check access log. Do 
you see entry for requested URL there? What does it look like?

-Ognjen

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Re: Issue in IPv6 evironment

Posted by Geett Chanddra Singha <ge...@gmail.com>.

Hi,

- what version of Tomcat (x.y.z) you are using
  - *Tomcat Version 6.0.035*

- under what version of Java
  - *Java version 1.6.033*
*
*
- under what platform O.S.
 - *Windows and Linux*

Regards,
Geett

On Wed, Mar 6, 2013 at 3:56 PM, André Warnier <aw...@ice-sa.com> wrote:

> Geett Chanddra Singha wrote:
>
>> Hi All,
>>
>> I would like to know is that is it ok to add this as shown below
>>
>> protocol="org.apache.coyote.**http11.Http11Protocol"
>>
>> in
>>
>> <Connector port="8080" maxHttpHeaderSize="8192" *
>> maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
>> enableLookups="false"  acceptCount="100" connectionTimeout="20000"
>> disableUploadTimeout="true" />
>>
>>
> As there are certainly differences in the <tag> attributes between
> different versions of Tomcat, it would be a good idea to mention
> - what version of Tomcat (x.y.z) you are using
> - under what version of Java
> - under what platform O.S.
>
> This is by the way a good practice in general for *any* question to the
> list, as it usually saves time for everyone.
>
>
>
> ------------------------------**------------------------------**---------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.**apache.org<us...@tomcat.apache.org>
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>


-- 
Thanks & Regards
Geett Chanddra Singha

Re: Issue in IPv6 evironment

Posted by André Warnier <aw...@ice-sa.com>.

Geett Chanddra Singha wrote:
> Hi All,
> 
> I would like to know is that is it ok to add this as shown below
> 
> protocol="org.apache.coyote.http11.Http11Protocol"
> 
> in
> 
> <Connector port="8080" maxHttpHeaderSize="8192" *
> maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
> enableLookups="false"  acceptCount="100" connectionTimeout="20000"
> disableUploadTimeout="true" />
> 

As there are certainly differences in the <tag> attributes between different versions of 
Tomcat, it would be a good idea to mention
- what version of Tomcat (x.y.z) you are using
- under what version of Java
- under what platform O.S.

This is by the way a good practice in general for *any* question to the list, as it 
usually saves time for everyone.


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