<div dir="ltr">Seems like all the engine logs are full with the same error.<div>From vdsm.log.16.xz I can see an error which might explain this failure:<br></div><div><br></div><div><div>2018-02-12 07:51:16,161+0100 INFO  (ioprocess communication (40573)) [IOProcess] Starting ioprocess (__init__:447)</div><div>2018-02-12 07:51:16,201+0100 INFO  (jsonrpc/3) [vdsm.api] FINISH mergeSnapshots return=None from=::ffff:10.0.0.46,57032, flow_id=fd4041b3-2301-44b0-aa65-02bd089f6568, task_id=1be430dc-eeb0-4dc9-92df-3f5b7943c6e0 (api:52)</div><div>2018-02-12 07:51:16,275+0100 INFO  (jsonrpc/3) [jsonrpc.JsonRpcServer] RPC call Image.mergeSnapshots succeeded in 0.13 seconds (__init__:573)</div><div>2018-02-12 07:51:16,276+0100 INFO  (tasks/1) [storage.ThreadPool.WorkerThread] START task 1be430dc-eeb0-4dc9-92df-3f5b7943c6e0 (cmd=&lt;bound method Task.commit of &lt;vdsm.storage.task.Task instance at 0x7fa1a0785248&gt;&gt;, args=None) (threadPool:208)</div><div>2018-02-12 07:51:16,543+0100 INFO  (tasks/1) [storage.Image] sdUUID=47b7c9aa-ef53-48bc-bb55-4a1a0ba5c8d5 vmUUID= imgUUID=ee9ab34c-47a8-4306-95d7-dd4318c69ef5 ancestor=9cdc96de-65b7-4187-8ec3-8190b78c1825 successor=8f595e80-1013-4c14-a2f5-252bce9526fdpostZero=False discard=False (image:1240)</div><div>2018-02-12 07:51:16,669+0100 ERROR (tasks/1) [storage.TaskManager.Task] (Task=&#39;1be430dc-eeb0-4dc9-92df-3f5b7943c6e0&#39;) Unexpected error (task:875)</div><div>Traceback (most recent call last):</div><div>  File &quot;/usr/lib/python2.7/site-packages/vdsm/storage/task.py&quot;, line 882, in _run</div><div>    return fn(*args, **kargs)</div><div>  File &quot;/usr/lib/python2.7/site-packages/vdsm/storage/task.py&quot;, line 336, in run</div><div>    return self.cmd(*self.argslist, **self.argsdict)</div><div>  File &quot;/usr/lib/python2.7/site-packages/vdsm/storage/securable.py&quot;, line 79, in wrapper</div><div>    return method(self, *args, **kwargs)</div><div>  File &quot;/usr/lib/python2.7/site-packages/vdsm/storage/sp.py&quot;, line 1853, in mergeSnapshots</div><div>    discard)</div><div>  File &quot;/usr/lib/python2.7/site-packages/vdsm/storage/image.py&quot;, line 1251, in merge</div><div>    srcVol = vols[successor]</div><div>KeyError: u&#39;8f595e80-1013-4c14-a2f5-252bce9526fd&#39;</div></div><div><br></div><div>Ala, maybe you know if there is any known issue with mergeSnapshots?</div><div>The usecase here are VMs from oVirt 3.5 which got registered to oVirt 4.2.</div><div><br></div><div>Regards,</div><div>Maor</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Feb 14, 2018 at 10:11 AM, Enrico Becchetti <span dir="ltr">&lt;<a href="mailto:enrico.becchetti@pg.infn.it" target="_blank">enrico.becchetti@pg.infn.it</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div text="#000000" bgcolor="#FFFFFF">
      Hi,
    <div class="m_8250037812935481317moz-cite-prefix">also you can download them throught
      these<br>
      links:<br>
      <br>
      <a class="m_8250037812935481317moz-txt-link-freetext" href="https://owncloud.pg.infn.it/index.php/s/QpsTyGxtRTPYRTD" target="_blank">https://owncloud.pg.infn.it/<wbr>index.php/s/QpsTyGxtRTPYRTD</a><br>
    </div>
    <a class="m_8250037812935481317moz-txt-link-freetext" href="https://owncloud.pg.infn.it/index.php/s/ph8pLcABe0nadeb" target="_blank">https://owncloud.pg.infn.it/<wbr>index.php/s/ph8pLcABe0nadeb</a><br>
    <br>
    Thanks again !!!!<div><div class="h5"><br>
    Best Regards<br>
    Enrico<br>
    <br>
    <blockquote type="cite">
      <div class="m_8250037812935481317moz-cite-prefix"> Il 13/02/2018 14:52, Maor Lipchuk ha
        scritto:<br>
      </div>
      <blockquote type="cite">
        <div dir="ltr"><br>
          <div class="gmail_extra"><br>
            <div class="gmail_quote">On Tue, Feb 13, 2018 at 3:51 PM,
              Maor Lipchuk <span dir="ltr">&lt;<a href="mailto:mlipchuk@redhat.com" target="_blank">mlipchuk@redhat.com</a>&gt;</span>
              wrote:<br>
              <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                <div dir="ltr">
                  <div class="gmail_extra"><br>
                    <div class="gmail_quote"><span>On Tue, Feb
                        13, 2018 at 3:42 PM, Enrico Becchetti <span dir="ltr">&lt;<a href="mailto:enrico.becchetti@pg.infn.it" target="_blank">enrico.becchetti@pg.infn.it</a>&gt;</span>
                        wrote:<br>
                        <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
                          <div bgcolor="#FFFFFF">
                            <div class="m_8250037812935481317m_1867120190031562186gmail-m_-8783667902876592593moz-cite-prefix">see
                              the attach files please ... thanks for
                              your attention !!!<br>
                            </div>
                          </div>
                        </blockquote>
                        <div class="gmail_quote"><br>
                        </div>
                        <div class="gmail_quote"><br>
                        </div>
                      </span>Seems like the engine logs does not contain
                      the entire process, can you please share older
                      logs since the import operation?</div>
                  </div>
                </div>
              </blockquote>
              <div><br>
              </div>
              <div>And VDSM logs as well from your host</div>
              <div> </div>
              <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                <div dir="ltr">
                  <div class="gmail_extra">
                    <div class="gmail_quote">
                      <div>
                        <div class="m_8250037812935481317h5">
                          <div> </div>
                          <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
                            <div bgcolor="#FFFFFF">
                              <div class="m_8250037812935481317m_1867120190031562186gmail-m_-8783667902876592593moz-cite-prefix">
                                Best Regards<br>
                                Enrico
                                <div>
                                  <div class="m_8250037812935481317m_1867120190031562186gmail-h5"><br>
                                    <br>
                                    Il 13/02/2018 14:09, Maor Lipchuk ha
                                    scritto:<br>
                                  </div>
                                </div>
                              </div>
                              <div>
                                <div class="m_8250037812935481317m_1867120190031562186gmail-h5">
                                  <blockquote type="cite">
                                    <div dir="ltr"><br>
                                      <div class="gmail_extra"><br>
                                        <div class="gmail_quote">On Tue,
                                          Feb 13, 2018 at 1:48 PM,
                                          Enrico Becchetti <span dir="ltr">&lt;<a href="mailto:enrico.becchetti@pg.infn.it" target="_blank">enrico.becchetti@pg.infn.it</a>&gt;</span>
                                          wrote:<br>
                                          <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> Dear All,<br>
                                            I have been using ovirt for
                                            a long time with three
                                            hypervisors and an external
                                            engine running in a centos
                                            vm .<br>
                                            <br>
                                            This three hypervisors have
                                            HBAs and access to fiber
                                            channel storage. Until
                                            recently I used version 3.5,
                                            then I reinstalled
                                            everything from scratch and
                                            now I have 4.2.<br>
                                            <br>
                                            Before formatting
                                            everything, I detach the
                                            storage data domani (FC)
                                            with the virtual machines
                                            and reimported it to the new
                                            4.2 and all went well. In<br>
                                            this domain there were
                                            virtual machines with and
                                            without snapshots.<br>
                                            <br>
                                            Now I have two problems. The
                                            first is that if I try to
                                            delete a snapshot the
                                            process is not end
                                            successful and remains
                                            hanging and the second
                                            problem is that<br>
                                            in one case I lost the
                                            virtual machine !!!<br>
                                          </blockquote>
                                          <div><br>
                                          </div>
                                          <div><br>
                                          </div>
                                          <div>Not sure that I fully
                                            understand the scneario.&#39;</div>
                                          <div>How was the virtual
                                            machine got lost if you only
                                            tried to delete a snapshot?</div>
                                          <div> </div>
                                          <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> <br>
                                            So I need your help to kill
                                            the three running zombie
                                            tasks because with
                                            taskcleaner.sh I can&#39;t do
                                            anything and then I need to
                                            know how I can delete the
                                            old snapshots<br>
                                            made with the 3.5 without
                                            losing other data or without
                                            having new processes that
                                            terminate correctly.<br>
                                            <br>
                                            If you want some log files
                                            please let me know.<br>
                                          </blockquote>
                                          <div><br>
                                          </div>
                                          <div><br>
                                          </div>
                                          <div>Hi Enrico,</div>
                                          <div><br>
                                          </div>
                                          <div>Can you please attach the
                                            engine and VDSM logs</div>
                                          <div>  </div>
                                          <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> <br>
                                            Thank you so much.<br>
                                            Best Regards<span class="m_8250037812935481317m_1867120190031562186gmail-m_-8783667902876592593gmail-HOEnZb"><font color="#888888"><br>
                                                Enrico<br>
                                                <br>
                                                <br>
                                              </font></span><br>
______________________________<wbr>_________________<br>
                                            Users mailing list<br>
                                            <a href="mailto:Users@ovirt.org" target="_blank">Users@ovirt.org</a><br>
                                            <a href="http://lists.ovirt.org/mailman/listinfo/users" rel="noreferrer" target="_blank">http://lists.ovirt.org/mailman<wbr>/listinfo/users</a><br>
                                            <br>
                                          </blockquote>
                                        </div>
                                        <br>
                                      </div>
                                    </div>
                                  </blockquote>
                                  <p><br>
                                  </p>
                                </div>
                              </div>
                              <span class="m_8250037812935481317m_1867120190031562186gmail-HOEnZb"><font color="#888888">
                                  <pre class="m_8250037812935481317m_1867120190031562186gmail-m_-8783667902876592593moz-signature" cols="72">-- 
______________________________<wbr>______________________________<wbr>___________

Enrico Becchetti                    Servizio di Calcolo e Reti

Istituto Nazionale di Fisica Nucleare - Sezione di Perugia
Via Pascoli,c/o Dipartimento di Fisica  06123 Perugia (ITALY)
Phone:<a href="tel:+39%20075%20585%202777" value="+390755852777" target="_blank">+39 075 5852777</a>             Mail: Enrico.Becchetti&lt;at&gt;<a href="http://pg.infn.it" target="_blank">pg.infn.it</a>
______________________________<wbr>______________________________<wbr>__________ </pre>
                                </font></span></div>
                          </blockquote>
                        </div>
                      </div>
                    </div>
                    <br>
                  </div>
                </div>
              </blockquote>
            </div>
            <br>
          </div>
        </div>
      </blockquote>
      <p><br>
      </p>
      <pre class="m_8250037812935481317moz-signature" cols="72">-- 
______________________________<wbr>______________________________<wbr>___________

Enrico Becchetti                    Servizio di Calcolo e Reti

Istituto Nazionale di Fisica Nucleare - Sezione di Perugia
Via Pascoli,c/o Dipartimento di Fisica  06123 Perugia (ITALY)
Phone:<a href="tel:+39%20075%20585%202777" value="+390755852777" target="_blank">+39 075 5852777</a>             Mail: Enrico.Becchetti&lt;at&gt;<a href="http://pg.infn.it" target="_blank">pg.infn.it</a>
______________________________<wbr>______________________________<wbr>__________ </pre>
    </blockquote>
    <p><br>
    </p>
    <pre class="m_8250037812935481317moz-signature" cols="72">-- 
______________________________<wbr>______________________________<wbr>___________

Enrico Becchetti                    Servizio di Calcolo e Reti

Istituto Nazionale di Fisica Nucleare - Sezione di Perugia
Via Pascoli,c/o Dipartimento di Fisica  06123 Perugia (ITALY)
Phone:<a href="tel:+39%20075%20585%202777" value="+390755852777" target="_blank">+39 075 5852777</a>             Mail: Enrico.Becchetti&lt;at&gt;<a href="http://pg.infn.it" target="_blank">pg.infn.it</a>
______________________________<wbr>______________________________<wbr>__________ </pre>
  </div></div></div>

</blockquote></div><br></div>