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I have a Wordpress site that is hosted on Windows Azure, with the database hosted separately. Every time I try to update a post I get a 502 error, specifically:

502 - Web server received an invalid response while acting as a gateway or proxy server.

The DB provider says everything is fine - does anyone know how I can troubleshoot this problem? Oddly enough - basic reads are fine - the error only occurs when I try to update a post.

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It sounds like a db connection timeout ;-) Can you save other settings or pages without problems? –  birgire Sep 11 '13 at 1:40
    
Nope - I can do reads, but no writes or edits. Now that I think about it, I can only do http gets, not http posts. –  Steve French Sep 11 '13 at 11:46
    
Is your application set to 32 or 64 bits (see here) –  birgire Sep 11 '13 at 13:20
    
I just reset it to 32 bit - absolutely no change. –  Steve French Sep 12 '13 at 14:45
    
And you get the same for plain vanilla mysql update command via php without going through WordPress? –  birgire Sep 16 '13 at 14:46
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1 Answer

up vote 0 down vote accepted

I turned on failed request tracing, and saw many entries (not errors, but entries) for Glimpse (I have wordpress running as a subdirectory of my .net site). Glimpse is not supposed to be running in production - but apparently it does. When I removed Glimpse everything worked just fine. Live and learn I guess.

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