Oved Ourfali has submitted this change and it was merged. Change subject: core: protocol fall back for older vdsms ...................................................................... core: protocol fall back for older vdsms When we try to install new host which only supports xmlrpc and we have cluster with compatibility level set to 3.5+ the code will fail. Solution for this issue is attempting to connect by using jsonrpc and if it fails falling back to xmlrpc. Bug-Url: https://bugzilla.redhat.com/1149655 Change-Id: Ie9af3129a4adf839f2d4c2e110425a6c69e45256 Signed-off-by: pkliczewski <piotr.kliczewski(a)gmail.com&gt; --- M backend/manager/modules/bll/src/main/java/org/ovirt/engine/core/bll/InstallVdsInternalCommand.java M backend/manager/modules/bll/src/main/java/org/ovirt/engine/core/bll/transport/ProtocolDetector.java M backend/manager/modules/common/src/main/java/org/ovirt/engine/core/common/config/ConfigValues.java M packaging/dbscripts/upgrade/pre_upgrade/0000_config.sql 4 files changed, 56 insertions(+), 11 deletions(-) Approvals: Piotr Kliczewski: Verified Oved Ourfali: Looks good to me, approved -- To view, visit http://gerrit.ovirt.org/34255 To unsubscribe, visit http://gerrit.ovirt.org/settings Gerrit-MessageType: merged Gerrit-Change-Id: Ie9af3129a4adf839f2d4c2e110425a6c69e45256 Gerrit-PatchSet: 4 Gerrit-Project: ovirt-engine Gerrit-Branch: master Gerrit-Owner: Piotr Kliczewski <piotr.kliczewski(a)gmail.com&gt; Gerrit-Reviewer: Barak Azulay <bazulay(a)redhat.com&gt; Gerrit-Reviewer: Eli Mesika <emesika(a)redhat.com&gt; Gerrit-Reviewer: Oved Ourfali <oourfali(a)redhat.com&gt; Gerrit-Reviewer: Piotr Kliczewski <piotr.kliczewski(a)gmail.com&gt; Gerrit-Reviewer: Saggi Mizrahi <smizrahi(a)redhat.com&gt; Gerrit-Reviewer: automation(a)ovirt.org Gerrit-Reviewer: oVirt Jenkins CI Server