Stephen, On 11/3/15 4:01 PM, Stephen Booth wrote: > Does anyone have any advice about how to make fail-over work more > cleanly with PermGen errors (other than the obvious one of not letting > PermGen errors occur) > > I'm using apache ModProxy to connect to tomcat over ajp with additional > hot-spare servers confgured for fail-over but if I mess up and let the > jvm run out of PermGen space then tomcat seems to stay alive enough to > prevent fail-over but not enough to actually serve any content.
Memory-related errors are always problematic. Do you have any instrumentation/monitoring to check the liveness of your Tomcat nodes? Can it detect the OOME condition? If so, you should be able to notify the load-balancer that something had gone wrong. I'm unsure of how to do it with mod_proxy_ajp, but mod_jk can be re-configured externally e.g. by calling curl with a specially-crafted URL[1]. -chris [1] https://wiki.apache.org/tomcat/tools/mod_jk.py --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
