Vladimir Sitnikov created HTTPCLIENT-2359:
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Summary: Retry HTTP requests if server closes connection before
sending status line as per RFC 2068, 8.2
Key: HTTPCLIENT-2359
URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2359
Project: HttpComponents HttpClient
Issue Type: Improvement
Components: HttpClient (classic)
Affects Versions: 4.5.14
Reporter: Vladimir Sitnikov
See https://www.rfc-editor.org/rfc/rfc2068#section-8.2
{quote}if an HTTP/1.1 client has seen an HTTP/1.1 or
later response from the server, and it sees the connection close
before receiving any status from the server, the client SHOULD retry
the request without user interaction so long as the request method is
idempotent (see section 9.1.2); other methods MUST NOT be
automatically retried, although user agents MAY offer a human
operator the choice of retrying the request..{quote}
I'm not an expert in HTTP / RFC, however, it looks like Httpclient should retry
idempotent methods in case it receives EOF instead of a status line.
As far as I understand, the only way to configure Httpclient to detect closed
connections is to configure {{connectionManager.setValidateAfterInactivity}},
however, it is more like a workaround since the server can close connections at
arbitrary time (e.g. it can even close the connections within a couple of
seconds if there's a huge connection demand).
I suggest Httpclient should implement rfc2068, and it should retry (reconnect)
in case it observes EOF before receiving the status line.
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