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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - W3C Web Platform Tests occasionally flake on the bots (Web Platform Test server fails?)"
href="https://bugs.webkit.org/show_bug.cgi?id=158137#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - W3C Web Platform Tests occasionally flake on the bots (Web Platform Test server fails?)"
href="https://bugs.webkit.org/show_bug.cgi?id=158137">bug 158137</a>
from <span class="vcard"><a class="email" href="mailto:youennf@gmail.com" title="youenn fablet <youennf@gmail.com>"> <span class="fn">youenn fablet</span></a>
</span></b>
<pre>The error seems indeed located in wpt server.
Looking at the log, the server starts at some point to return 404 to URLs pointing to files that should exist (resources/testharnessreport.js, existing IDB test files).
The request handler is FileHandler (<a href="https://github.com/w3c/wptserve/blob/22c2f947fafa07ce26d381bf5215714067c41ae6/wptserve/handlers.py">https://github.com/w3c/wptserve/blob/22c2f947fafa07ce26d381bf5215714067c41ae6/wptserve/handlers.py</a>)
Whenever this part of code is raising OSError or IOError, it is converted to a 404 HTTP response.
Logging these errors may help getting additional information.
I can prepare a patch to add that logging, something like "self.logger.error(traceback.format_exc())" after line 148 in "handlers.py"</pre>
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