Arik Hadas has submitted this change and it was merged. Change subject: core: Fix race between AutoStartVmsRunner and ProcessDownVmCommand ...................................................................... core: Fix race between AutoStartVmsRunner and ProcessDownVmCommand Issue for killed HA VM: AutoStartVmsRunner acquires lock and runs the HA VM if there's no NEXT_RUN. It causes race condition between removing the NEXT_RUN snapshot in ProcessDownVmCommand.applyNextRunConfiguration() and calling UpdateVmCommand to apply it. The UpdateVmCommand fails to acquire locks if the RunVm command is executed right after the NEXT_RUN snapshot is removed. Fixed by: ProcessDownVmCommand.applyNextRunConfiguration() acquires lock before removing the NEXT_RUN snapshot and passes it to the UpdateVmCommand. The AutoStartVmsRunner keeps failing to acquire the VM lock until the NEXT_RUN is applied. Change-Id: Ie2f1a4a1b114fd95c535f41191cd980311f35f6e Bug-Url: https://bugzilla.redhat.com/1369521 Signed-off-by: Marek Libra <mlibra(a)redhat.com&gt; --- M backend/manager/modules/bll/src/main/java/org/ovirt/engine/core/bll/ProcessDownVmCommand.java M backend/manager/modules/bll/src/main/java/org/ovirt/engine/core/bll/UpdateVmCommand.java 2 files changed, 43 insertions(+), 16 deletions(-) Approvals: Jenkins CI: Passed CI tests Marek Libra: Verified Arik Hadas: Looks good to me, approved -- To view, visit https://gerrit.ovirt.org/65906 To unsubscribe, visit https://gerrit.ovirt.org/settings Gerrit-MessageType: merged Gerrit-Change-Id: Ie2f1a4a1b114fd95c535f41191cd980311f35f6e Gerrit-PatchSet: 4 Gerrit-Project: ovirt-engine Gerrit-Branch: master Gerrit-Owner: Marek Libra <mlibra(a)redhat.com&gt; Gerrit-Reviewer: Arik Hadas <ahadas(a)redhat.com&gt; Gerrit-Reviewer: Jakub Niedermertl <jniederm(a)redhat.com&gt; Gerrit-Reviewer: Jenkins CI Gerrit-Reviewer: Marek Libra <mlibra(a)redhat.com&gt; Gerrit-Reviewer: Tomas Jelinek <tjelinek(a)redhat.com&gt; Gerrit-Reviewer: gerrit-hooks <automation(a)ovirt.org&gt;