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Posted to users@tomcat.apache.org by Taral Shah <ta...@contechsoftware.com> on 2002/08/16 06:06:23 UTC
Root Context Problem
Hi,
I have posted this sort of problem before but didnt get any answer. Now I
have found the root casue for my problem, I request you all to please guide
me.
I am having a particular client requirement where he send the url as shown
below:
http://<ip>/cgi/tjs/myexe.exe?abc
Now I am able to redirect /cgi/tjs/myexe.exe request to my servlet with
servlet mapping but Here It gives me the dll error.
My servlet is loading one dll, and when this code gets executed it gives me
error ...dll already loaded.
My context is something like<network> and If i dont make it default context
and send request as
http://<ip>/network/cgi/tjs/myexe.exe?abc then I dont get this error.
but if i send request as shown at top then it fives me error. I tried to put
my servlet in the ROOT context but still getting same error.
Does any one have any idea regarding this?
Thanks
Taral Shah
Software Engineer,
Contech Software Ltd.
tarals@contechsoftware.com
Experience is what you get when you were expecting something else.
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Re: Root Context Problem
Posted by David Mossakowski <dm...@Instinet.Com>.
You should load the library once in init and put it into servlet context
so that for each subsequent request you will use the loaded library.
d.
Taral Shah wrote:
> but suppose my two different servlets needs to load the library then what
> should i do.
> Also the same question stays there, Why am I able to execute the code if i
> write the context path in url(I mean i am able to load the dll second time)
> Also there isnt any method to unload the dll(as far as I know), then what
> should be the possible solution?
>
> Thanks
> Taral Shah
> ----- Original Message -----
> From: "Craig R. McClanahan" <cr...@apache.org>
> To: "Tomcat Users List" <to...@jakarta.apache.org>; "Taral Shah"
> <ta...@contechsoftware.com>
> Sent: Friday, August 16, 2002 1:14 PM
> Subject: Re: Root Context Problem
>
>
>
>
> On Fri, 16 Aug 2002, Taral Shah wrote:
>
>
>>Date: Fri, 16 Aug 2002 13:08:23 +0530
>>From: Taral Shah <ta...@contechsoftware.com>
>>Reply-To: Tomcat Users List <to...@jakarta.apache.org>,
>> Taral Shah <ta...@contechsoftware.com>
>>To: Tomcat Users List <to...@jakarta.apache.org>
>>Subject: Re: Root Context Problem
>>
>>You may be right but then as I wrote in the mail if i send request as
>>http://<ip>/network/cgi/tjs/myexe.exe?abc then it works, loads dll and
>>displays the data.
>>
>>and if i send request as http://<ip>/cgi/tjs/myexe.exe?abc then it gives
>>error.
>>So i think its something with configuration problem for tomcat.
>>I have made network as my default web context.
>>
>
>
> The problem with that theory is that Tomcat *never* loads *any* DLL files
> on its own. The only way that can happen is if your application does it,
> by calling Runtime.loadLibrary() or something like that. Its up to your
> app to ensure that this happens once and only once for the lifetime of a
> JVM.
>
>
>>Thanks
>>Taral Shah
>
>
> Craig
>
>
>
>>----- Original Message -----
>>From: "Craig R. McClanahan" <cr...@apache.org>
>>To: "Tomcat Users List" <to...@jakarta.apache.org>; "Taral Shah"
>><ta...@contechsoftware.com>
>>Cc: "Josh" <jo...@gfunk007.com>
>>Sent: Friday, August 16, 2002 12:58 PM
>>Subject: Re: Root Context Problem
>>
>>
>>
>>
>>On Fri, 16 Aug 2002, Taral Shah wrote:
>>
>>
>>>Date: Fri, 16 Aug 2002 09:36:23 +0530
>>>From: Taral Shah <ta...@contechsoftware.com>
>>>Reply-To: Tomcat Users List <to...@jakarta.apache.org>,
>>> Taral Shah <ta...@contechsoftware.com>
>>>To: Tomcat Users List <to...@jakarta.apache.org>,
>>> Josh <jo...@gfunk007.com>
>>>Subject: Root Context Problem
>>>
>>>Hi,
>>>I have posted this sort of problem before but didnt get any answer. Now
>>
> I
>
>>>have found the root casue for my problem, I request you all to please
>>
>>guide
>>
>>>me.
>>>
>>>I am having a particular client requirement where he send the url as
>>
> shown
>
>>>below:
>>>http://<ip>/cgi/tjs/myexe.exe?abc
>>>
>>>Now I am able to redirect /cgi/tjs/myexe.exe request to my servlet with
>>>servlet mapping but Here It gives me the dll error.
>>>My servlet is loading one dll, and when this code gets executed it gives
>>
>>me
>>
>>>error ...dll already loaded.
>>>
>>>My context is something like<network> and If i dont make it default
>>
>>context
>>
>>>and send request as
>>>http://<ip>/network/cgi/tjs/myexe.exe?abc then I dont get this error.
>>>but if i send request as shown at top then it fives me error. I tried to
>>
>>put
>>
>>>my servlet in the ROOT context but still getting same error.
>>>
>>>Does any one have any idea regarding this?
>>>
>>
>>This isn't a Tomcat issue -- it is a restriction of most Java JVMs that
>>you can only load a single DLL once in the lifetime of a JVM. It is up to
>>your application to ensure that this restriction is met (or to ignore the
>>exception if your app tries to load a DLL more than once anyway).
>>
>>
>>>Thanks
>>>Taral Shah
>>>Software Engineer,
>>>Contech Software Ltd.
>>>tarals@contechsoftware.com
>>>
>>
>
>
>
>
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> To unsubscribe, e-mail: <ma...@jakarta.apache.org>
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>
>
>
--
David Mossakowski dmoss@instinet.com
Instinet Corporation 212.310.7275
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Re: Root Context Problem
Posted by Taral Shah <ta...@contechsoftware.com>.
but suppose my two different servlets needs to load the library then what
should i do.
Also the same question stays there, Why am I able to execute the code if i
write the context path in url(I mean i am able to load the dll second time)
Also there isnt any method to unload the dll(as far as I know), then what
should be the possible solution?
Thanks
Taral Shah
----- Original Message -----
From: "Craig R. McClanahan" <cr...@apache.org>
To: "Tomcat Users List" <to...@jakarta.apache.org>; "Taral Shah"
<ta...@contechsoftware.com>
Sent: Friday, August 16, 2002 1:14 PM
Subject: Re: Root Context Problem
On Fri, 16 Aug 2002, Taral Shah wrote:
> Date: Fri, 16 Aug 2002 13:08:23 +0530
> From: Taral Shah <ta...@contechsoftware.com>
> Reply-To: Tomcat Users List <to...@jakarta.apache.org>,
> Taral Shah <ta...@contechsoftware.com>
> To: Tomcat Users List <to...@jakarta.apache.org>
> Subject: Re: Root Context Problem
>
> You may be right but then as I wrote in the mail if i send request as
> http://<ip>/network/cgi/tjs/myexe.exe?abc then it works, loads dll and
> displays the data.
>
> and if i send request as http://<ip>/cgi/tjs/myexe.exe?abc then it gives
> error.
> So i think its something with configuration problem for tomcat.
> I have made network as my default web context.
>
The problem with that theory is that Tomcat *never* loads *any* DLL files
on its own. The only way that can happen is if your application does it,
by calling Runtime.loadLibrary() or something like that. Its up to your
app to ensure that this happens once and only once for the lifetime of a
JVM.
> Thanks
> Taral Shah
Craig
>
> ----- Original Message -----
> From: "Craig R. McClanahan" <cr...@apache.org>
> To: "Tomcat Users List" <to...@jakarta.apache.org>; "Taral Shah"
> <ta...@contechsoftware.com>
> Cc: "Josh" <jo...@gfunk007.com>
> Sent: Friday, August 16, 2002 12:58 PM
> Subject: Re: Root Context Problem
>
>
>
>
> On Fri, 16 Aug 2002, Taral Shah wrote:
>
> > Date: Fri, 16 Aug 2002 09:36:23 +0530
> > From: Taral Shah <ta...@contechsoftware.com>
> > Reply-To: Tomcat Users List <to...@jakarta.apache.org>,
> > Taral Shah <ta...@contechsoftware.com>
> > To: Tomcat Users List <to...@jakarta.apache.org>,
> > Josh <jo...@gfunk007.com>
> > Subject: Root Context Problem
> >
> > Hi,
> > I have posted this sort of problem before but didnt get any answer. Now
I
> > have found the root casue for my problem, I request you all to please
> guide
> > me.
> >
> > I am having a particular client requirement where he send the url as
shown
> > below:
> > http://<ip>/cgi/tjs/myexe.exe?abc
> >
> > Now I am able to redirect /cgi/tjs/myexe.exe request to my servlet with
> > servlet mapping but Here It gives me the dll error.
> > My servlet is loading one dll, and when this code gets executed it gives
> me
> > error ...dll already loaded.
> >
> > My context is something like<network> and If i dont make it default
> context
> > and send request as
> > http://<ip>/network/cgi/tjs/myexe.exe?abc then I dont get this error.
> > but if i send request as shown at top then it fives me error. I tried to
> put
> > my servlet in the ROOT context but still getting same error.
> >
> > Does any one have any idea regarding this?
> >
>
> This isn't a Tomcat issue -- it is a restriction of most Java JVMs that
> you can only load a single DLL once in the lifetime of a JVM. It is up to
> your application to ensure that this restriction is met (or to ignore the
> exception if your app tries to load a DLL more than once anyway).
>
> > Thanks
> > Taral Shah
> > Software Engineer,
> > Contech Software Ltd.
> > tarals@contechsoftware.com
> >
>
>
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Re: Root Context Problem
Posted by "Craig R. McClanahan" <cr...@apache.org>.
On Fri, 16 Aug 2002, Taral Shah wrote:
> Date: Fri, 16 Aug 2002 13:08:23 +0530
> From: Taral Shah <ta...@contechsoftware.com>
> Reply-To: Tomcat Users List <to...@jakarta.apache.org>,
> Taral Shah <ta...@contechsoftware.com>
> To: Tomcat Users List <to...@jakarta.apache.org>
> Subject: Re: Root Context Problem
>
> You may be right but then as I wrote in the mail if i send request as
> http://<ip>/network/cgi/tjs/myexe.exe?abc then it works, loads dll and
> displays the data.
>
> and if i send request as http://<ip>/cgi/tjs/myexe.exe?abc then it gives
> error.
> So i think its something with configuration problem for tomcat.
> I have made network as my default web context.
>
The problem with that theory is that Tomcat *never* loads *any* DLL files
on its own. The only way that can happen is if your application does it,
by calling Runtime.loadLibrary() or something like that. Its up to your
app to ensure that this happens once and only once for the lifetime of a
JVM.
> Thanks
> Taral Shah
Craig
>
> ----- Original Message -----
> From: "Craig R. McClanahan" <cr...@apache.org>
> To: "Tomcat Users List" <to...@jakarta.apache.org>; "Taral Shah"
> <ta...@contechsoftware.com>
> Cc: "Josh" <jo...@gfunk007.com>
> Sent: Friday, August 16, 2002 12:58 PM
> Subject: Re: Root Context Problem
>
>
>
>
> On Fri, 16 Aug 2002, Taral Shah wrote:
>
> > Date: Fri, 16 Aug 2002 09:36:23 +0530
> > From: Taral Shah <ta...@contechsoftware.com>
> > Reply-To: Tomcat Users List <to...@jakarta.apache.org>,
> > Taral Shah <ta...@contechsoftware.com>
> > To: Tomcat Users List <to...@jakarta.apache.org>,
> > Josh <jo...@gfunk007.com>
> > Subject: Root Context Problem
> >
> > Hi,
> > I have posted this sort of problem before but didnt get any answer. Now I
> > have found the root casue for my problem, I request you all to please
> guide
> > me.
> >
> > I am having a particular client requirement where he send the url as shown
> > below:
> > http://<ip>/cgi/tjs/myexe.exe?abc
> >
> > Now I am able to redirect /cgi/tjs/myexe.exe request to my servlet with
> > servlet mapping but Here It gives me the dll error.
> > My servlet is loading one dll, and when this code gets executed it gives
> me
> > error ...dll already loaded.
> >
> > My context is something like<network> and If i dont make it default
> context
> > and send request as
> > http://<ip>/network/cgi/tjs/myexe.exe?abc then I dont get this error.
> > but if i send request as shown at top then it fives me error. I tried to
> put
> > my servlet in the ROOT context but still getting same error.
> >
> > Does any one have any idea regarding this?
> >
>
> This isn't a Tomcat issue -- it is a restriction of most Java JVMs that
> you can only load a single DLL once in the lifetime of a JVM. It is up to
> your application to ensure that this restriction is met (or to ignore the
> exception if your app tries to load a DLL more than once anyway).
>
> > Thanks
> > Taral Shah
> > Software Engineer,
> > Contech Software Ltd.
> > tarals@contechsoftware.com
> >
>
> Craig McClanahan
>
>
> --
> To unsubscribe, e-mail:
> <ma...@jakarta.apache.org>
> For additional commands, e-mail:
> <ma...@jakarta.apache.org>
>
>
>
> --
> To unsubscribe, e-mail: <ma...@jakarta.apache.org>
> For additional commands, e-mail: <ma...@jakarta.apache.org>
>
>
--
To unsubscribe, e-mail: <ma...@jakarta.apache.org>
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Re: Root Context Problem
Posted by Taral Shah <ta...@contechsoftware.com>.
You may be right but then as I wrote in the mail if i send request as
http://<ip>/network/cgi/tjs/myexe.exe?abc then it works, loads dll and
displays the data.
and if i send request as http://<ip>/cgi/tjs/myexe.exe?abc then it gives
error.
So i think its something with configuration problem for tomcat.
I have made network as my default web context.
Thanks
Taral Shah
----- Original Message -----
From: "Craig R. McClanahan" <cr...@apache.org>
To: "Tomcat Users List" <to...@jakarta.apache.org>; "Taral Shah"
<ta...@contechsoftware.com>
Cc: "Josh" <jo...@gfunk007.com>
Sent: Friday, August 16, 2002 12:58 PM
Subject: Re: Root Context Problem
On Fri, 16 Aug 2002, Taral Shah wrote:
> Date: Fri, 16 Aug 2002 09:36:23 +0530
> From: Taral Shah <ta...@contechsoftware.com>
> Reply-To: Tomcat Users List <to...@jakarta.apache.org>,
> Taral Shah <ta...@contechsoftware.com>
> To: Tomcat Users List <to...@jakarta.apache.org>,
> Josh <jo...@gfunk007.com>
> Subject: Root Context Problem
>
> Hi,
> I have posted this sort of problem before but didnt get any answer. Now I
> have found the root casue for my problem, I request you all to please
guide
> me.
>
> I am having a particular client requirement where he send the url as shown
> below:
> http://<ip>/cgi/tjs/myexe.exe?abc
>
> Now I am able to redirect /cgi/tjs/myexe.exe request to my servlet with
> servlet mapping but Here It gives me the dll error.
> My servlet is loading one dll, and when this code gets executed it gives
me
> error ...dll already loaded.
>
> My context is something like<network> and If i dont make it default
context
> and send request as
> http://<ip>/network/cgi/tjs/myexe.exe?abc then I dont get this error.
> but if i send request as shown at top then it fives me error. I tried to
put
> my servlet in the ROOT context but still getting same error.
>
> Does any one have any idea regarding this?
>
This isn't a Tomcat issue -- it is a restriction of most Java JVMs that
you can only load a single DLL once in the lifetime of a JVM. It is up to
your application to ensure that this restriction is met (or to ignore the
exception if your app tries to load a DLL more than once anyway).
> Thanks
> Taral Shah
> Software Engineer,
> Contech Software Ltd.
> tarals@contechsoftware.com
>
Craig McClanahan
--
To unsubscribe, e-mail:
<ma...@jakarta.apache.org>
For additional commands, e-mail:
<ma...@jakarta.apache.org>
--
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Re: Root Context Problem
Posted by "Craig R. McClanahan" <cr...@apache.org>.
On Fri, 16 Aug 2002, Taral Shah wrote:
> Date: Fri, 16 Aug 2002 09:36:23 +0530
> From: Taral Shah <ta...@contechsoftware.com>
> Reply-To: Tomcat Users List <to...@jakarta.apache.org>,
> Taral Shah <ta...@contechsoftware.com>
> To: Tomcat Users List <to...@jakarta.apache.org>,
> Josh <jo...@gfunk007.com>
> Subject: Root Context Problem
>
> Hi,
> I have posted this sort of problem before but didnt get any answer. Now I
> have found the root casue for my problem, I request you all to please guide
> me.
>
> I am having a particular client requirement where he send the url as shown
> below:
> http://<ip>/cgi/tjs/myexe.exe?abc
>
> Now I am able to redirect /cgi/tjs/myexe.exe request to my servlet with
> servlet mapping but Here It gives me the dll error.
> My servlet is loading one dll, and when this code gets executed it gives me
> error ...dll already loaded.
>
> My context is something like<network> and If i dont make it default context
> and send request as
> http://<ip>/network/cgi/tjs/myexe.exe?abc then I dont get this error.
> but if i send request as shown at top then it fives me error. I tried to put
> my servlet in the ROOT context but still getting same error.
>
> Does any one have any idea regarding this?
>
This isn't a Tomcat issue -- it is a restriction of most Java JVMs that
you can only load a single DLL once in the lifetime of a JVM. It is up to
your application to ensure that this restriction is met (or to ignore the
exception if your app tries to load a DLL more than once anyway).
> Thanks
> Taral Shah
> Software Engineer,
> Contech Software Ltd.
> tarals@contechsoftware.com
>
Craig McClanahan
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To unsubscribe, e-mail: <ma...@jakarta.apache.org>
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