Unexpected Error


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Quite frequently I've been getting this Unexpected Error (404 error) while logging in to both w7forums and windows10forums. The error happens around the same time of day, 2 to 4 AM central time zone.

I've ignored it several times and come close to reporting it a few other times. I finally decided to report it tonight.
 
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Regedit32

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Hi Clifford,

What browser are you using to log in with when you get this error?

Regedit32
 
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Firefox 43.01

After a few minutes the error goes away and it is the next day before I see it again.
 

Regedit32

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Hi Clifford,

It's possible in the preferences for your Firefox browser the network.http.sendRefererHeader is set to 0.

Depending on how a webserver is set up this can cause a default error to be triggered, usually 404, but occasionally a 403 error too.

To resolve this simply:
  • open the Firefox browser
  • In the Location/Address bar type about:config and press ENTER key
    • Alternately click Tools | Options | Advanced | General | then click the Config Efitor button
  • You ought to see a long list of preferences. Scroll down to location network.http.sendRefererHeader
    • If its value is 0 or 2, then left double-click it and set value to 1 (i.e. network.http.sendRefererHeader: 1)
Note: If you cannot see network.http.sendRefererHead at all in the preference list then add it to the list by doing the following:
  • Right click in a blank area of page (or select Context Menu)
  • Select New Type of Preference
    • You will be prompted for the preference name and initial value.
    • Enter: network.http.sendRefererHeader for the name and 1 for the value

Sources:

Regards,

Regedit32
 

Ian

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Thanks for the heads up Clifford - if it happens again, if you could let me know the exact date/time it happens (GMT if possible- as that's the server time) and I'll look at the logs and see what happens at this end :).
 

Ian

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Thanks Clifford, this hasn't shown up in the usual logs - so I'll need to see why that is. I'll add a MySQL monitor and see what's going on :).
 
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Ian

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It looks like nothing appeared in the main logs as everything is still running, but the MySQL table is locked during a slow query that happens around this time. I've got the query from the log and I'm seeing if I can re-factor it to prevent this from happening.
 

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