Created attachment 1294291 [details]
engine.log

Description of problem:
I see this error message on engine log after trying to execute sparsify on vm disk. The sparsify action failed.
From engine log:
2017-07-04 17:35:23,068+03 ERROR [org.ovirt.engine.core.bll.tasks.CommandCallbacksPoller] (DefaultQuartzScheduler1) [disks_syncAction_b7735a81-3304-47d6] Failed invoking callback end method 'onFailed' for command '7ba228dd-89f9-4b33-a35f-453d1c2e0cbf' with exception 'null', the callback is marked for end method retries
2017-07-04 17:35:23,076+03 ERROR [org.ovirt.engine.core.bll.storage.disk.SparsifyImageCommand] (DefaultQuartzScheduler1) [disks_syncAction_0bbfabfd-d8ca-46d4] Ending command 'org.ovirt.engine.core.bll.storage.disk.SparsifyImageCommand' with failure.
2017-07-04 17:35:23,082+03 INFO  [org.ovirt.engine.core.utils.transaction.TransactionSupport] (DefaultQuartzScheduler1) [disks_syncAction_0bbfabfd-d8ca-46d4] transaction rolled back
2017-07-04 17:35:23,089+03 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogableBase] (DefaultQuartzScheduler1) [disks_syncAction_0bbfabfd-d8ca-46d4] Error during log command: org.ovirt.engine.core.bll.storage.disk.SparsifyImageCommand. Exception null

The message appear endlessly on the log and don't stop.

Some background: 
The Night before the hosts in the setup were not reachable since they are  
nested hosts and the nested setup were down since storage problem in lab.
I restore the setup and activate the hosts, but i see in the engine log the DB query failed (could cause the problem i see after restoring the setup)
From engine log:
2017-07-04 03:17:03,125+03 ERROR [org.ovirt.engine.core.bll.job.ExecutionHandler] (DefaultQuartzScheduler4) [disks_syncAction_b7735a81-3304-47d6] Exception: org.springframework.dao.DataIntegrityViolationException: CallableStatementCallback; SQL [{call insertstep(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)}]; ERROR: insert or update on table "step" violates foreign key constraint "fk_step_job"
  Detail: Key (job_id)=(38cbfcfa-fab8-4e52-91b2-af05c3924083) is not present in table "job".
  Where: SQL statement "INSERT INTO step (
        step_id,
        parent_step_id,
        job_id,
        step_type,
        description,
        step_number,
        status,
        progress,
        start_time,
        end_time,
        correlation_id,
        external_id,
        external_system_type,
        is_external
        )
    VALUES (
        v_step_id,
        v_parent_step_id,
        v_job_id,
        v_step_type,
        v_description,
        v_step_number,
        v_status,
        v_progress,
        v_start_time,
        v_end_time,
        v_correlation_id,
        v_external_id,
        v_external_system_type,
        v_is_external
        )"
PL/pgSQL function insertstep(uuid,uuid,uuid,character varying,text,integer,character varying,smallint,timestamp with time zone,timestamp with time zone,character varying,uuid,character varying,boolean) line 3 at SQL statement; nested exception is org.postgresql.util.PSQLException: ERROR: insert or update on table "step" violates foreign key constraint "fk_step_job"


Version-Release number of selected component (if applicable):
Red Hat Virtualization Manager Version: 4.1.3.4-0.1.el7

Host:
OS Version:RHEL - 7.4 - 11.el7
Kernel Version:3.10.0 - 663.el7.x86_64
KVM Version:2.9.0 - 10.el7
LIBVIRT Version:libvirt-3.2.0-4.el7
VDSM Version:vdsm-4.19.18-1.el7ev
SPICE Version:0.12.8 - 2.el7


Steps to Reproduce:
1. After activate host 
2. Run sparsify on vm disk 


Additional info:
Attaching engine log