ComponentNotFoundException when googlebot scrapes wicket page

[Robert Gründler <ro...@dubture.com>]

Hi,

we’ve a very odd problem and are somewhat stuck, maybe someone here on the list has seen this sort of behaviour before.

We’ve deployed a small wicket app (4 pages) to a tomcat7 server and all 4 pages work just fine on the live system. 

However, when googlebot scrapes the pages, we see ComponentNotFound exceptions:

ComponentNotFoundException: Could not find component 'titleBar:menu:2:link' on page XYZ

We’ve tried to fetch the page as google bot from the webmaster tools, but the exception is not being triggered either.

No matter how we request the page, we cannot reproduce this exception. Only 2 or 3 times a day when the bot 
indexes us, we see this in the logs.

We’ve also made sure the pages are stateless using the @StalessComponent annotation in combination with the StatelessChecker listener.

Has anyone an idea what could cause this?

thanks!


-robert

Re: ComponentNotFoundException when googlebot scrapes wicket page

[Paul Bors <pa...@bors.ws>]

ie: How do you create the menu links?
Where does the model come from and are those links dynamic?

On Tue, Sep 16, 2014 at 11:15 AM, Paul Bors <pa...@bors.ws> wrote:

> Well, you have the wicket component tree path to what's not found:
> titleBar:menu:2:link
>
> The 3rd (index 2) menu link was missing at the point your page was
> rendered.
> Start thinking about how your 'menu' component could miss that from the
> mode.
>
> Or perhaps someone used the back-page button and your page was not in the
> page store?
>
> On Tue, Sep 16, 2014 at 3:42 AM, Robert Gründler <ro...@dubture.com>
> wrote:
>
>> Hi,
>>
>> we’ve a very odd problem and are somewhat stuck, maybe someone here on
>> the list has seen this sort of behaviour before.
>>
>> We’ve deployed a small wicket app (4 pages) to a tomcat7 server and all 4
>> pages work just fine on the live system.
>>
>> However, when googlebot scrapes the pages, we see ComponentNotFound
>> exceptions:
>>
>> ComponentNotFoundException: Could not find component
>> 'titleBar:menu:2:link' on page XYZ
>>
>> We’ve tried to fetch the page as google bot from the webmaster tools, but
>> the exception is not being triggered either.
>>
>> No matter how we request the page, we cannot reproduce this exception.
>> Only 2 or 3 times a day when the bot
>> indexes us, we see this in the logs.
>>
>> We’ve also made sure the pages are stateless using the @StalessComponent
>> annotation in combination with the StatelessChecker listener.
>>
>> Has anyone an idea what could cause this?
>>
>> thanks!
>>
>>
>> -robert
>>
>>
>>
>>
>

Re: ComponentNotFoundException when googlebot scrapes wicket page

[Paul Bors <pa...@bors.ws>]

Well, you have the wicket component tree path to what's not found:
titleBar:menu:2:link

The 3rd (index 2) menu link was missing at the point your page was rendered.
Start thinking about how your 'menu' component could miss that from the
mode.

Or perhaps someone used the back-page button and your page was not in the
page store?

On Tue, Sep 16, 2014 at 3:42 AM, Robert Gründler <ro...@dubture.com> wrote:

> Hi,
>
> we’ve a very odd problem and are somewhat stuck, maybe someone here on the
> list has seen this sort of behaviour before.
>
> We’ve deployed a small wicket app (4 pages) to a tomcat7 server and all 4
> pages work just fine on the live system.
>
> However, when googlebot scrapes the pages, we see ComponentNotFound
> exceptions:
>
> ComponentNotFoundException: Could not find component
> 'titleBar:menu:2:link' on page XYZ
>
> We’ve tried to fetch the page as google bot from the webmaster tools, but
> the exception is not being triggered either.
>
> No matter how we request the page, we cannot reproduce this exception.
> Only 2 or 3 times a day when the bot
> indexes us, we see this in the logs.
>
> We’ve also made sure the pages are stateless using the @StalessComponent
> annotation in combination with the StatelessChecker listener.
>
> Has anyone an idea what could cause this?
>
> thanks!
>
>
> -robert
>
>
>
>