Just before sending the http request, I tried setting the session context timeout and cachesize both to 0, but it had no apparent effect (I tried both protocols "SSL" and "TLS").
I've spent enough time on this. I give up. I implemented a batch file that calls this class in a loop, I guess I'll have to settle for that. > -----Original Message----- > From: Oleg Kalnichevski [mailto:[EMAIL PROTECTED] > Sent: Thursday, September 07, 2006 9:01 AM > To: Jakarta Commons Users List > Subject: RE: How to make HttpClient NOT send > "Proxy-Connection: Keep-Alive"? > > On Thu, 2006-09-07 at 08:48 -0700, Karr, David wrote: > > I thought I'd gone through this explanation already. > > > > I have an application that is a web service, which when > invoked, will > > send two consecutive requests to an external web service > through our > > firewall (using HttpClient). It will be executed at random > times of > > the day, perhaps in bursts. > > > > That application is working fine, but I need to write a test client > > for the external web service that is only intended to measure the > > performance baseline we should expect for the external web > service. I > > want to make this test client convenient to use, and give it the > > ability to simulate some load on the external web service. I want > > each iteration of the two-message test case to be > independent. If I > > execute each test case by itself on a single thread, I get > that, but > > if I execute the test case two times in a row on the same > thread, then > > the second test case is faster than the first. I want to do what I > > can to prevent that optimization. I want two consecutive > runs of the > > test case on the same thread to execute almost the same as two runs > > executed from separate threads. > > > > I certainly agree that it's always a good thing to keep open http > > connections for subsequent requests, and to cache data for the SSL > > connection, but in the case of my test client, I'm trying to defeat > > those optimizations. > > > > I still do not quite see why. Anyways, > javax.net.ssl.SSLContext and javax.net.ssl.SSLSessionContext > are your best friends > > Hope this help > > Oleg > > > > > -----Original Message----- > > > From: Oleg Kalnichevski [mailto:[EMAIL PROTECTED] > > > Sent: Thursday, September 07, 2006 8:25 AM > > > To: Jakarta Commons Users List > > > Subject: RE: How to make HttpClient NOT send > > > "Proxy-Connection: Keep-Alive"? > > > > > > On Wed, 2006-09-06 at 06:32 -0700, Karr, David wrote: > > > > Ok, how do I diagnose that, and is there anything I can do > > > about it? > > > > > > > > > > David, > > > > > > Actually, SSL session caching is meant to be a good thing, as it > > > reduces the overhead of re-opening SSL connections. Why would you > > > want to disable it? > > > > > > Oleg > > > > > > > > -----Original Message----- > > > > > From: Oleg Kalnichevski [mailto:[EMAIL PROTECTED] > > > > > Sent: Wednesday, September 06, 2006 2:51 AM > > > > > To: Jakarta Commons Users List > > > > > Subject: RE: How to make HttpClient NOT send > > > > > "Proxy-Connection: Keep-Alive"? > > > > > > > > > > On Tue, 2006-09-05 at 14:21 -0700, Karr, David wrote: > > > > > > Sigh. > > > > > > > > > > > > Adding the "Connection: close" header didn't help. In > > > > > fact, I don't > > > > > > even see it in Ethereal. I don't get that. > > > > > > > > > > > > Adding a derived HttpConnectionManager didn't help. > I derived > > > > > > from SimpleHttpConnectionManager, just adding a > > > > > releaseConnection() method > > > > > > that closes the connection. I added a print statement to > > > > > the method > > > > > > to make sure it got there. > > > > > > > > > > > > There must be something else that causes the first > > > > > connection on the > > > > > > thread to be slower than the 2nd-Nth connections. > > > > > > > > > > > > > > > > I suspect that something is likely to be SSL session caching. > > > > > > > > > > Oleg > > > > > > > > > > > > -----Original Message----- > > > > > > > From: Oleg Kalnichevski [mailto:[EMAIL PROTECTED] > > > > > > > Sent: Tuesday, September 05, 2006 11:25 AM > > > > > > > To: Jakarta Commons Users List > > > > > > > Subject: RE: How to make HttpClient NOT send > > > > > > > "Proxy-Connection: Keep-Alive"? > > > > > > > > > > > > > > On Tue, 2006-09-05 at 11:02 -0700, Karr, David wrote: > > > > > > > > Acknowledged. > > > > > > > > > > > > > > > .... > > > > > > > > So, is there any way I can convince HttpClient > to make the > > > > > > > connection > > > > > > > > go away between each test case (between each pair > > > of requests, > > > > > > > > that is)? I figured getting it to not send the > "Keep-Alive" > > > > > > > header would > > > > > > > > do it, but apparently you're saying that that > is necessary > > > > > > > for SSL to work. > > > > > > > > > > > > > > > > > > > > > > This is a whole different story. In order to disable > > > connection > > > > > > > persistence you can (1) add "Connection: close" to each > > > > > request or > > > > > > > (2) implement a custom connection manager (or extend > > > an existing > > > > > > > one) and close connections upon their release in the > > > > > > > HttpConnectionManager#releaseConnection method > > > > > > > > > > > > > > Hope this helps, > > > > > > > > > > > > > > Oleg > > > > > > > > > > > > > > > > > > > > > > > -----Original Message----- > > > > > > > > > From: Oleg Kalnichevski [mailto:[EMAIL PROTECTED] > > > > > > > > > Sent: Tuesday, September 05, 2006 10:27 AM > > > > > > > > > To: Jakarta Commons Users List > > > > > > > > > Subject: RE: How to make HttpClient NOT send > > > > > > > > > "Proxy-Connection: Keep-Alive"? > > > > > > > > > > > > > > > > > > On Tue, 2006-09-05 at 10:09 -0700, Karr, David wrote: > > > > > > > > > > Well, the URL I'm going to is using https, > but I'm not > > > > > > > > > doing anything > > > > > > > > > > specific with SSL in the HttpClient connection. > > > > > > > > > > > > > > > > > > > > > > > > > > > > That pretty much explains why you are seeing > > > > > "Proxy-Connection: > > > > > > > > > Keep-Alive" headers with the traffic analyzer. These > > > > > headers are > > > > > > > > > sent with the HTTP CONNECT method because if the > > > > > > > connection is not > > > > > > > > > kept alive you would not be able to tunnel secure > > > > > > > > > connections through the proxy > > > > > > > > > > > > > > > > > > Hope this helps somewhat. > > > > > > > > > > > > > > > > > > Oleg > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -----Original Message----- > > > > > > > > > > > From: Oleg Kalnichevski [mailto:[EMAIL PROTECTED] > > > > > > > > > > > Sent: Tuesday, September 05, 2006 9:27 AM > > > > > > > > > > > To: Jakarta Commons Users List > > > > > > > > > > > Subject: RE: How to make HttpClient NOT send > > > > > > > > > > > "Proxy-Connection: Keep-Alive"? > > > > > > > > > > > > > > > > > > > > > > On Tue, 2006-09-05 at 09:12 -0700, Karr, > David wrote: > > > > > > > > > > > > I'm confused. This seemed like it > would work. I > > > > > > > > > > > > added two subclasses, one called > > > > > > > > > > > > "GetMethodNoKeepAlive", and > > > > > > > the other > > > > > > > > > > > > "PostMethodNoKeepAlive". I created > > > instances of those > > > > > > > > > instead of > > > > > > > > > > > > "GetMethod" and "PostMethod". Each of the > > > subclasses > > > > > > > > > has an empty > > > > > > > > > > > > "addProxyConnectionHeader" method, except > > > for a print > > > > > > > > > > > statement saying > > > > > > > > > > > > it got there. I monitored the execution in > > > > > > > Ethereal. When it > > > > > > > > > > > > executed, I saw the print statements > > > execute, but my > > > > > > > > > > > > timing > > > > > > > > > > > behavior > > > > > > > > > > > > made it look like it made no difference. In my > > > > > > > > > Ethereal results, > > > > > > > > > > > > I still see the > > > > > > > > > > > > "Proxy-Connection: Keep-Alive" when it > > > connects to the > > > > > > > > > > > external host. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > David, > > > > > > > > > > > > > > > > > > > > > > Are you using SSL tunneling by any chance? > > > > > > > > > > > > > > > > > > > > > > Oleg > > > > > > > > > > > > > > > > > > > > > > > I even tried overriding the > > > > > "shouldCloseConnection" method > > > > > > > > > > > to return > > > > > > > > > > > > true, in both classes. Still no effect. > > > > > > > > > > > > > > > > > > > > > > > > > -----Original Message----- > > > > > > > > > > > > > From: Oleg Kalnichevski > > > > > > > > > > > > > [mailto:[EMAIL PROTECTED] > > > > > > > > > > > > > Sent: Tuesday, September 05, 2006 5:00 AM > > > > > > > > > > > > > To: Jakarta Commons Users List > > > > > > > > > > > > > Cc: Karr, David > > > > > > > > > > > > > Subject: Re: How to make HttpClient NOT send > > > > > > > > > > > > > "Proxy-Connection: Keep-Alive"? > > > > > > > > > > > > > > > > > > > > > > > > > > On Wed, 2006-08-30 at 15:04 -0700, Karr, > > > David wrote: > > > > > > > > > > > > > > This may seem strange, but is it > > > possible to make > > > > > > > > > > > > > HttpClient NOT send > > > > > > > > > > > > > > the "Proxy-Connection: Keep-Alive" header? > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > David, > > > > > > > > > > > > > > > > > > > > > > > > > > There's no elegant solution to this > problem. The > > > > > > > only way to > > > > > > > > > > > > > work the problem around is to subclass method > > > > > > > classes (such > > > > > > > > > > > > > as > > > > > > > > > > > GetMethod, > > > > > > > > > > > > > PostMethod, and so on) and override the > > > > > > > > > > > > > HttpMethodBase#addProxyConnectionHeader method > > > > > > > > > > > > > > > > > > > > > > > > > > Oleg > > > > > > > > > > > > > > > > > > > > > > > > > > > I'm trying to write a test tool to > load test > > > > > > > > > > > > > > an outside web > > > > > > > > > > > > > service, > > > > > > > > > > > > > > but doing it in a way that is somewhat > > > > > consistent with > > > > > > > > > > > an internal > > > > > > > > > > > > > > application that will be calling that > > > outside web > > > > > > > > > service. My > > > > > > > > > > > > > > test tool can send the message multiple > > > times so > > > > > > > > > > > > > > we can generate > > > > > > > > > > > > > statistics > > > > > > > > > > > > > > on the roundtrip time. What I > first noticed > > > > > > > > > > > > > > is that > > > > > > > > > > > when I send N > > > > > > > > > > > > > > messages on a thread, the 2nd-Nth > message is > > > > > > > > > > > > > > faster > > > > > > > > > > > than the first > > > > > > > > > > > > > > one. After examining the protocol > behavior in > > > > > > > > > > > Ethereal, I noticed > > > > > > > > > > > > > > that HttpClient appears to be sending a > > > > > > > "Proxy-Connection: > > > > > > > > > > > > > Keep-Alive" > > > > > > > > > > > > > > header. If I modified my test code to add a > > > > > > > manual delay > > > > > > > > > > > > > > (9-10 > > > > > > > > > > > > > > seconds) between each message send, > then the > > > > > > > > > > > > > > 2nd-Nth > > > > > > > > > > > > > message timings > > > > > > > > > > > > > > were about the same as the first one. > > > > > > > > > > > > > > > > > > > > > > > > > > > > I'd prefer not to have that manual delay > > > > > > > > > > > > > > between > > > > > > > > > each message. > > > > > > > > > > > > > > For the sake of getting consistent > results, is > > > > > > > > > there any way > > > > > > > > > > > > > > to disable the sending of the > "Proxy-Connection: > > > > > > > > > > > Keep-Alive" header? > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -------------------------------------------------------------------- > > > > > > > > > > > > > - > > > > > > > > > > > > > > To unsubscribe, e-mail: > > > > > > > > > > > > > > [EMAIL PROTECTED] > > > > > > > > > > > > > > For additional commands, e-mail: > > > > > > > > > > > > > [EMAIL PROTECTED] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -------------------------------------------------------------------- > > > > > > > > > > > > > - 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