-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 11/13/19 11:20, M. Manna wrote: > HI Mark, > > On Wed, 13 Nov 2019 at 15:38, Mark Thomas <ma...@apache.org> > wrote: > >> On 12/11/2019 19:11, M. Manna wrote: >>> HI Mark, >>> >>> following my previous reply, we have now confirmed that it's >>> indeed >> 8.5.45 >>> with APR 1.2.23 that's causing such high JVM CPU usage. We used >>> took out 2 out of 50 servers from the load balancer config, >>> reverted tomcat, and redeployed. With near to identical user >>> traffic, the two servers are responding normally >>> without/without traffic with 8.5.41. The JVM dump looks a lot >>> better with 8.5.41. >>> >>> We do think that the recent changes in APR and some other >>> tomcat jar may have caused compatibility issue on Windows >>> server 2016 (64-bit) platform. But unfortunately, we cannot >>> pinpoint exactly what change may have caused this (i.e. actual >>> OS vs Security Updates). With this in mind, we are also being >>> wary to move to 8.5.47 as we don't know if the same issue will >> occur >>> again. Since 8.5.41 has been packaged with previously accepted >> application >>> installer, we are more comfortable rolling back. >> >> Just to confirm, you see this high CPU usage with a clean install >> (no additional web applications deployed, no configuration >> changes) on Windows 2016 DataCenter (64-bit)? >> >> If this is the case, it should be fairly easy to reproduce. >> >> Mark >> >> We do not deploy multiple applications. In fact, Under tomcat > webapps/ROOT we only have one application (ours). Each tomcat > instance is hosted on a VM (total 50) and all of them are > identically configured (server.xml, web.xml, logging, CPU/RAM). We > have not made any other configuration change between 8.5.41 and > 8.5.45. And yes, I agree with you that it's fairly easy to > reproduce.
I think the question is whether or not your application is required to be deployed. Can you reproduce this issue with just the stock applications bundled with Tomcat? - -chris -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAl3MLscACgkQHPApP6U8 pFip5A/+KOg4ZvATDli8zG9ZxniMoPdkOC9LQgVKscjeLZHL/A1gzVLP8UPZSiU7 1+p44WwJ5WGgwe8Ne0NZTFlh7/DZQAGIQZv++Ii9+NRkY5KVP3dYykdoyg1UdUMB Fdu2KNDcsCERYpPqrE/kVk+TQZNI60vY8iTBntc+Og5LsukULZTbX3UO9BzDaqeO WsjVuP6q7hUDBntd+5YqeFKDJ07zEIm5V6vmHAbCOWm3g2B8IXiYkMTXM+ZLld9h 6Th8f+na79taUrxT9TwI1WoR/ZJguJW1c8eRPbykv9/riDrtTQsv0BZy0ZeMhnjv kEwurNMaYjtSSCGOD0e8/chy1rU0/gng99pkmGe0Wiwoob6/6AU0HhE/2RvLKzDY mR4hu+aDaxtog4CD9DQrGenId+pwbJteqhXVCye6V0A3JtobbR+D56cxcUbth1pP skMdXrTWTvVlmsyLfKjPmMiALzOqg0bqvfYH5bEitW1Y8HvCQN5vcht2+EOpchmp zZ0f0LQpXEyr3DJ/GSbPTRKHghMAnrB4yz9jlMvzdWoPX2/JyT3+IQOoe8eRtlD8 e6uoQzXoguXFr9J5OLGR5TXdBLx5/obCUWUM2wS/w5TQ3MvV3C5haSKYWTVIcetp XuAzKmK6fKFBHn37pMLd4VELy9Ay+zQmtTrpDJzB9pPwX/gr6JQ= =VqkL -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
