Public bug reported: For no particular reason nova-scheduler cpu utilization can jump to 100%. I was unable to find any pattern and reason why this is happening. We've small cluster 1 cloud controller and 7 node controllers. Except high cpu usage nothing bad happens, we're able to create/delete instances, after nova-scheduler restart everything goes back to normal state.
I was able to strace 2 processes while nova-scheduler was using 100% cpu. 1st process is in loop and it prints: <12>2014-09-16 00:02:21.501 5668 WARNING nova.openstack.common.loopingcall [-] task run outlasted interval by 12.322771 sec\0" 2nd processes is in loop as well and it's repeating: epoll_ctl(6, EPOLL_CTL_ADD, 3, {EPOLLOUT|EPOLLERR|EPOLLHUP, {u32=3, u64=40095890530107395}}) = 0 epoll_wait(6, {{EPOLLOUT, {u32=3, u64=40095890530107395}}}, 1023, 878) = 1 epoll_ctl(6, EPOLL_CTL_DEL, 3, {EPOLLRDNORM|EPOLLRDBAND|EPOLLWRNORM|EPOLLMSG|EPOLLHUP|0x2485d020, {u32=32708, u64=23083065509183428}}) = 0 sendto(3, "<14>2014-09-16 00:44:19.272 5673 INFO oslo.messaging._drivers.impl_rabbit [-] Connecting to AMQP server on 10.3.128.254:5672\0", 125, 0, NULL, 0) = -1 ENOTCONN (Transport endpoint is not connected) Other processes doesn't have any issues with AMQP server just only nova- scheduler. We're using Debian, kernel 3.14-1-amd64, nova-scheduler 2014.1.2-1. ** Affects: nova Importance: Undecided Status: New -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1371084 Title: nova-scheduler high cpu usage Status in OpenStack Compute (Nova): New Bug description: For no particular reason nova-scheduler cpu utilization can jump to 100%. I was unable to find any pattern and reason why this is happening. We've small cluster 1 cloud controller and 7 node controllers. Except high cpu usage nothing bad happens, we're able to create/delete instances, after nova-scheduler restart everything goes back to normal state. I was able to strace 2 processes while nova-scheduler was using 100% cpu. 1st process is in loop and it prints: <12>2014-09-16 00:02:21.501 5668 WARNING nova.openstack.common.loopingcall [-] task run outlasted interval by 12.322771 sec\0" 2nd processes is in loop as well and it's repeating: epoll_ctl(6, EPOLL_CTL_ADD, 3, {EPOLLOUT|EPOLLERR|EPOLLHUP, {u32=3, u64=40095890530107395}}) = 0 epoll_wait(6, {{EPOLLOUT, {u32=3, u64=40095890530107395}}}, 1023, 878) = 1 epoll_ctl(6, EPOLL_CTL_DEL, 3, {EPOLLRDNORM|EPOLLRDBAND|EPOLLWRNORM|EPOLLMSG|EPOLLHUP|0x2485d020, {u32=32708, u64=23083065509183428}}) = 0 sendto(3, "<14>2014-09-16 00:44:19.272 5673 INFO oslo.messaging._drivers.impl_rabbit [-] Connecting to AMQP server on 10.3.128.254:5672\0", 125, 0, NULL, 0) = -1 ENOTCONN (Transport endpoint is not connected) Other processes doesn't have any issues with AMQP server just only nova-scheduler. We're using Debian, kernel 3.14-1-amd64, nova-scheduler 2014.1.2-1. To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1371084/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp