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https://issues.apache.org/jira/browse/HTTPCLIENT-1376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13688153#comment-13688153
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Oleg Kalnichevski commented on HTTPCLIENT-1376:
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Alternatively a full wire log would also help a great deal.
Oleg
> HttpClient incorrectly reuses HTTP/1.1 connection - the response body of the
> first request is considered as the response for the second request
> -----------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HTTPCLIENT-1376
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1376
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Affects Versions: 4.2.4
> Reporter: Carl D'Halluin
>
> In the following scenario, the HttpClient incorrectly reuses the HTTP/1.1
> stream, and actually considers the response body of the first request, to be
> the HTTP response to a second request.
> Details:
> 1. Client does a simple HTTP/1.1 GET request
> 2. Server responds with a 401 and a WWW-Authenticate header
> 3. Client repeats the GET request but now with an Authorization header
> 4. Server responds with a HTTP/1.1 200 OK but there is no content length. The
> server sends a response body
> 5. HttpClient ignores the response body by closing the entity content
> InputStream (or call EntityUtils.consume)
> 6. Client sends a new HTTP/1.1 GET request (totally unrelated to the previous
> one)
> 7. Client erroneously considers the response body received in step 5 as the
> response to step 6
> I tracked the bug down in the HttpClient library: Step 2 marks the HTTP
> connection as reusable. Step 4 should explicitly mark the connection as
> non-reusable since the only thing the client can do to such an ugly reponse
> (no content-length) is read until EOF. However, that does not happen in step
> 4. Hence in step 5 the code sees that the connection is reusable, and doesnt
> bother consuming the response content at all. The body is reused in step 7
> Here we see 4 times 2 subsequent request
> - first 2 are no authentication no streaming: HttpClient correctly does not
> reuse connection (see port number)
> - next 2 are no authentication with streaming: HttpClient correctly does not
> reuse connection
> - next 2 are with authentication with streaming: HttpClient correctly does
> not reuse connection
> - final 2 are with authentication no streaming: Bug - HttpClient tries to
> reuse connection given error. Closing the HttpResponse InputStream does not
> correctly close the underlying Socket
> {code}
> REQUEST: GET http://127.0.0.1:8777/non-authenticated.html
> RESPONSE STATUS: HTTP/1.1 200 OK - client is 127.0.0.1:49603
> RESPONSE BODY - SKIPPED
> REQUEST: GET http://127.0.0.1:8777/non-authenticated.html
> RESPONSE STATUS: HTTP/1.1 200 OK - client is 127.0.0.1:49604
> RESPONSE BODY - SKIPPED
> =======================
> REQUEST: GET http://127.0.0.1:8777/non-authenticated.html
> RESPONSE STATUS: HTTP/1.1 200 OK - client is 127.0.0.1:49605
> RESPONSE BODY: HTTP/1.1 400 This is a request body - client is
> 127.0.0.1:49605
> RESPONSE BODY:
> REQUEST: GET http://127.0.0.1:8777/non-authenticated.html
> RESPONSE STATUS: HTTP/1.1 200 OK - client is 127.0.0.1:49606
> RESPONSE BODY: HTTP/1.1 400 This is a request body - client is
> 127.0.0.1:49606
> RESPONSE BODY:
> =======================
> REQUEST: GET http://127.0.0.1:8777/authenticated.html
> RESPONSE STATUS: HTTP/1.1 200 OK - client is 127.0.0.1:49607
> RESPONSE BODY: HTTP/1.1 400 This is a request body - client is
> 127.0.0.1:49607
> RESPONSE BODY:
> REQUEST: GET http://127.0.0.1:8777/authenticated.html
> RESPONSE STATUS: HTTP/1.1 200 OK - client is 127.0.0.1:49608
> RESPONSE BODY: HTTP/1.1 400 This is a request body - client is
> 127.0.0.1:49608
> RESPONSE BODY:
> =======================
> REQUEST: GET http://127.0.0.1:8777/authenticated.html
> RESPONSE STATUS: HTTP/1.1 200 OK - client is 127.0.0.1:49609
> RESPONSE BODY - SKIPPED
> REQUEST: GET http://127.0.0.1:8777/authenticated.html
> RESPONSE STATUS: HTTP/1.1 400 This is a request body - client is
> 127.0.0.1:49609
> --> BUG! Response status 400
> RESPONSE BODY - SKIPPED
> {code}
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