Arik Hadas has submitted this change and it was merged. Change subject: core: prevent host in maintenance while vm runs on it in db ...................................................................... core: prevent host in maintenance while vm runs on it in db Before switching a host to maintenance, we set its status to prepare-to- maintenance and migrate the VMs that run on it. Only when no VMs run on the host, we switch it to maintenance. The problem is that we count on the number of VMs that are reported by the host. It is racy because we might get this report from VDSM before the Down event arrived or after the Down event has been ignored. This patch refine the check that is done before switching a host to maintenance to check that no VM is running on the host in the database as well. We check the database only if VDSM reports that no VM runs on it so it should be fine performance wise. Change-Id: Ia953d71bb0b036ed0e1e65527c650e955a031fa1 Bug-Url: https://bugzilla.redhat.com/1325938 Signed-off-by: Arik Hadas <ahadas(a)redhat.com&gt; --- M backend/manager/modules/dal/src/main/java/org/ovirt/engine/core/dao/VmDynamicDao.java M backend/manager/modules/dal/src/main/java/org/ovirt/engine/core/dao/VmDynamicDaoImpl.java M backend/manager/modules/dal/src/test/java/org/ovirt/engine/core/dao/VmDynamicDaoTest.java M backend/manager/modules/vdsbroker/src/main/java/org/ovirt/engine/core/vdsbroker/monitoring/MonitoringStrategyFactory.java M backend/manager/modules/vdsbroker/src/main/java/org/ovirt/engine/core/vdsbroker/monitoring/VirtMonitoringStrategy.java M backend/manager/modules/vdsbroker/src/test/java/org/ovirt/engine/core/vdsbroker/monitoring/MultipleServicesMonitoringStrategyTest.java M backend/manager/modules/vdsbroker/src/test/java/org/ovirt/engine/core/vdsbroker/monitoring/VirtMonitoringStrategyTest.java M packaging/dbscripts/vms_sp.sql 8 files changed, 66 insertions(+), 6 deletions(-) Approvals: Jenkins CI: Passed CI tests Arik Hadas: Verified; Looks good to me, approved -- To view, visit https://gerrit.ovirt.org/57230 To unsubscribe, visit https://gerrit.ovirt.org/settings Gerrit-MessageType: merged Gerrit-Change-Id: Ia953d71bb0b036ed0e1e65527c650e955a031fa1 Gerrit-PatchSet: 3 Gerrit-Project: ovirt-engine Gerrit-Branch: master Gerrit-Owner: Arik Hadas <ahadas(a)redhat.com&gt; Gerrit-Reviewer: Arik Hadas <ahadas(a)redhat.com&gt; Gerrit-Reviewer: Eli Mesika <emesika(a)redhat.com&gt; Gerrit-Reviewer: Jenkins CI Gerrit-Reviewer: Shahar Havivi <shavivi(a)redhat.com&gt; Gerrit-Reviewer: gerrit-hooks <automation(a)ovirt.org&gt;