Oleg, If I set a TTL, do I also need an IdleConnectionMonitorThread ( http://hc.apache.org/httpcomponents-client-ga/tutorial/html/connmgmt.html#d5e652 )? thanks, benson.
On Tue, Jun 21, 2016 at 4:41 AM, Oleg Kalnichevski <ol...@apache.org> wrote: > On Mon, 2016-06-20 at 13:57 -0400, Benson Margulies wrote: >> We use the async http components library to connect various components >> in a system that is deployed, in some cases, on AWS. When it's >> deployed on AWS, there are ELBs involved. >> >> Like some other people, we've having various trauma dealing with the >> very dynamic environment of AWS ELBs, which includes constant DNS >> changes and some other issues. So far, we've been making our HC >> configuration more and more complex. I'm wondering if we should back >> off and make it simpler -- make a new connection for each request. >> Obviously, this will be somewhat slower and more expensive, but at the >> moment we might prefer a slower and more expensive approach that works >> to one that occasionally gets lost. >> >> I appreciate that even making new connections all the time won't >> compensate for all possible DNS problems -- if Java itself caches a >> stale name->address translation, making a new connection will fail >> just as effectively as anything else. >> >> Does anyone out there have advice to share (other than running away from >> ELB)? >> > > Hi Benson > > I personally would consider disabling connection persistence extreme and > unnecessary. Consider setting the TTL (total time to live) of persistent > connections to some low value (say, 10 seconds or even less) instead. > This should improve distribution of connections across the cluster of > servers behind a load balancer. > > Hope it helps > > Oleg > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: httpclient-users-unsubscr...@hc.apache.org > For additional commands, e-mail: httpclient-users-h...@hc.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: httpclient-users-unsubscr...@hc.apache.org For additional commands, e-mail: httpclient-users-h...@hc.apache.org
