Lost UA connections can show up as "400 ERR_INVALID_REQ" in logs
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Key: TS-1056
URL: https://issues.apache.org/jira/browse/TS-1056
Project: Traffic Server
Issue Type: Bug
Components: HTTP
Reporter: Leif Hedstrom
Fix For: 3.1.2
So, it seems that with Firefox (it's the only one I've been able to reproduce
this with), we can end up getting a bunch of errors like
{code}
1324075013.826 0 216.239.45.4 ERR_INVALID_REQ/400 217 - / - NONE/- text/html -
{code}
Tracking this down, it seems the HTTP SM is getting a VC_EVENT_EOS (stream
closed) in state_read_client_request_header(). However, there is nothing in the
request_header (zero bytes), so when it tries to parse the (empty) request
header, it looks like a request error.
I'm not certain, yet at least, under what conditions we get this event (I'm
fairly certain that Firefox is somehow closing down the connection in some
weird state to us?). So, I'm suggesting we at least deal with this situation
earlier (before trying to parse the headers), which will instead cause an
"UNKNOWN_ERROR" (since we have no request nor response code. Suggested changes
attached.
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