Arik Hadas has submitted this change and it was merged. Change subject: core: filter duplicate requests to run the same vm ...................................................................... core: filter duplicate requests to run the same vm If engine gets multiple requests to run the same VM at the same time (with MultipleActionRunner), we might get into a situation where the VM does not run and kept locked. Say we got 2 run requests for the same VM: - The first command acquires the lock for the VM - The second command fails to acquire the lock - The can-do-action phase of the first command succeed - We sort the commands before invoking them. As part of the sort, we map Id of VM to its run command. Since we iterate the commands in the same order they were received, we end up with mapping the second command - Since the second command didn't manage to acquire the lock, it won't run Since the first command does not run, it won't release its lock. The solution is to filter the given parameters from duplicate requests to run the same VM. We now override the hashCode and equals methods in RunVmParams class so if we will get duplicate instances, they will be filtered while we insert them to a Set in MultipleActionRunner. Change-Id: I91320cfd50fc7a12b01afae2885a783c0516a6df Bug-Url: https://bugzilla.redhat.com/1169879 Signed-off-by: Arik Hadas <ahadas(a)redhat.com&gt; --- M backend/manager/modules/common/src/main/java/org/ovirt/engine/core/common/action/RunVmOnceParams.java M backend/manager/modules/common/src/main/java/org/ovirt/engine/core/common/action/RunVmParams.java M backend/manager/modules/common/src/main/java/org/ovirt/engine/core/common/action/VmOperationParameterBase.java 3 files changed, 107 insertions(+), 0 deletions(-) Approvals: Shahar Havivi: Looks good to me, approved Arik Hadas: Verified -- To view, visit http://gerrit.ovirt.org/36009 To unsubscribe, visit http://gerrit.ovirt.org/settings Gerrit-MessageType: merged Gerrit-Change-Id: I91320cfd50fc7a12b01afae2885a783c0516a6df Gerrit-PatchSet: 9 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: Moti Asayag <masayag(a)redhat.com&gt; Gerrit-Reviewer: Oved Ourfali <oourfali(a)redhat.com&gt; Gerrit-Reviewer: Shahar Havivi <shavivi(a)redhat.com&gt; Gerrit-Reviewer: Yair Zaslavsky <yzaslavs(a)redhat.com&gt; Gerrit-Reviewer: automation(a)ovirt.org Gerrit-Reviewer: oVirt Jenkins CI Server