On Wed, 2007-07-25 at 17:00 +0200, Rainer Jung wrote: > Hi, > > good questions. First of all: I just today wrote a new docs page about > timeouts. We are soon releasing 1.2.24 which contains this page. You can > already look at it under > > http://people.apache.org/~rjung/mod_jk-dev/docs/ > > (The new page is named "Timeouts" and part of the group Generic Howtos. > > Also the new docs contain a better explanation, what retries means, > especially the huge difference between retries for an lb worker and a > usual worker. This info is on the updated workers.properties page in the > reference guide. > > > With these settings how could I expect the connector to behave if: > > > > 1. Tomcat dies and the port is no longer listening resulting in an > > immediate icmp response. > > I would expect, that any attempt to use an existing connection or to > open a new one immediately returns with an error, because the remote > machine rejects the communication. Further JK behaviour is now depending > if you are using a load balancer or not. Se retries etc. in the updated > docs. > > > 2. The box hosting tomcat dies or the tcp stack for whatever reason > > tanks resulting in no immediate icmp response. > > As long as your local system or the last router still has an arp entry > for the died machine, you will run into very long TCP timeouts. We > recommend CPing/CPong, see the new Timeouts page. > > > 3. The connector does make a successful connection to the backend > > tomcat worker only to have that worker become slow and almost > > unresponsive. > > You should use CPing/CPong and reply timeouts. See again the new > Timeouts page. If you don't use an lb, the best you can do is throwing > an error early, such that the rest of the infrastructure doesnt get > congested. > > > Are there more directives I should be concerned with? Currently, I have > > no intentions on monitoring the http response status codes to detect > > errors. > > Look at the new page and look at the workers.properties page of the > reference guide. Use a load balancing worker, set recovery_options etc. > > HTH. > > Regards, > > Rainer > > P.S.: If you have suggestions how to improve the new page: it's not > public yet. If you are fast enough, we can include those changes. > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
Thanks I'll be reading up this afternoon and posting comments. --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
