I here add some info from Firebug which may be significant.
'GET localhost:8080/wap-app/start.action':
CookieJSESSIONID=9726CDF4A527E3D98451140AB69EFA2C;
JSESSIONID=BEED739340DDD4370C85A9D12917692A
'GET localhost:8080/webdav/images/.../1px.gif':
Cookie JSESSIONID=BEED739340DDD4370C85A9D12917692A
Johan
2009/12/22 Johan Thorselius <johan.thorsel...@gmail.com>
> The issue now boils down to the following a bit strange thing. Any idea why
> this happens ?
>
>
> - request.getSession() returns an incorrect null on Linux, but on Windows
> it's OK - under the following circumstances:
>
> When using Firebug on Firefox I noted that a corporate common .css
> references a 1-pixel gif which is not present and visible, hence there is a
> '404 Not found' error for the 'GET
> localhost:8080/webdav/images/.../1px.gif'. But the preceding 'GET
> localhost:8080/wap-app/start.action' is fine.
>
> In my myValve-class on Linux:
>
> 'GET localhost:8080/wap-app/start.action' => myValve.invoke() ...
> request.getSession() returns a correct session object
>
> 'GET localhost:8080/webdav/images/.../1px.gif' => myValve.invoke() ...
> request.getSession() and request.getSession(true) both returns null
>
> Same code and same build, in my myValve-class on Windows:
>
> Both GET => myValve.invoke() ... request.getSession() returns a correct
> session object
>
>
> The webapp is built with Struts2/Spring.
>
> Both Linux and Windows uses Tomcat 6.0.20.
>
>
> On Windows Java version 1.6.0_16 is used
>
> On RedHat Linux Java version 1.6.0_13 is used
>
> and..
>
>
> >> In the "log incorrect event" code, do you return
> >> from the valve, or do you continue processing?
>
> The execution continues down to the bottom with
> 'getNext().invoke(req,resp)'
>
> Johan
>
>
> 2009/12/17 Christopher Schultz <ch...@christopherschultz.net>
>
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>> Hash: SHA1
>>
>> Johan,
>>
>> On 12/17/2009 7:52 AM, Johan Thorselius wrote:
>> > request.getSession() returns an incorrect null on Linux, but on Windows
>> it's
>> > OK.
>>
>> That's odd... request.getSession() should never return null. This method:
>>
>> "
>> Returns the current session associated with this request, or if the
>> request does not have a session, creates one.
>> "
>>
>> > I have an ordinary Struts2 web app deployed on Tomcat 6.0.20, together
>> with
>> > a JAAS-solution where I have my own Valve class.
>> >
>> > The Valve repeatedly executes invoke() with the following code-snippet
>> (here
>> > very much simplified):
>> > .
>> > .
>> > .
>> > if (LOGGER.isDebugEnabled()) {
>> > if (request.getSession() == null) {
>> > // Log incorrect event (1)
>> > } else {
>> > // Log OK (2)
>> > }
>> > if (request.getSession(true) == null) {
>> > // Log incorrect event (3)
>> > } else {
>> > // Log OK (4)
>> > }
>> > }
>> >
>> > /*
>> > * Here a NullPointerException occurs
>> > */
>> > request.getSession().setAttribute("...",...);
>>
>> In the "log incorrect event" code, do you return from the valve, or do
>> you continue processing?
>>
>> > In the first request the session is not lost, everything is fine with
>> (2)
>> > and (4). In the following requests getSession() returns null (1) and
>> (3).
>>
>> Are you storing the request object anywhere and perhaps using it after
>> it's been recycled?
>>
>> - -chris
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>
