Tal Nisan has submitted this change and it was merged. Change subject: core: avoid db deadlock and unneeded db updates for images ...................................................................... core: avoid db deadlock and unneeded db updates for images When adding a VM from template (as part of pool or not), CreateSnapshotFromTemplateCommand is being executed and when the operation ends its end method is being called for each of the disks. In the end method there's an attempt to unlock the template image which causes to numerous issues: 1. There are attempts to update the template disks statuses to ok, as the updates aren't ordered and are executed for each added vm based on that template - db deadlocks occur. 2.Currently the template disks aren't being locked at all (which should be inspected regardless), so there's currently no point in unlocking them. The fix which is introduced is to not update the image status if it's already in the desired status, which will reduce the updates count in general and will prevent possible db deadlocks in the provided scenarios. Change-Id: I26a09ce674cfefd59819f3edf95accab31f0e80e Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=915753 Signed-off-by: Liron Aravot <laravot(a)redhat.com&gt; --- M backend/manager/modules/bll/src/main/java/org/ovirt/engine/core/bll/BaseImagesCommand.java 1 file changed, 1 insertion(+), 1 deletion(-) Approvals: Tal Nisan: Verified; Looks good to me, approved -- To view, visit http://gerrit.ovirt.org/21100 To unsubscribe, visit http://gerrit.ovirt.org/settings Gerrit-MessageType: merged Gerrit-Change-Id: I26a09ce674cfefd59819f3edf95accab31f0e80e Gerrit-PatchSet: 4 Gerrit-Project: ovirt-engine Gerrit-Branch: master Gerrit-Owner: Liron Ar <laravot(a)redhat.com&gt; Gerrit-Reviewer: Allon Mureinik <amureini(a)redhat.com&gt; Gerrit-Reviewer: Arik Hadas <ahadas(a)redhat.com&gt; Gerrit-Reviewer: Liron Ar <laravot(a)redhat.com&gt; Gerrit-Reviewer: Maor Lipchuk <mlipchuk(a)redhat.com&gt; Gerrit-Reviewer: Tal Nisan <tnisan(a)redhat.com&gt; Gerrit-Reviewer: oVirt Jenkins CI Server