Hi Tigran Can you test with an upstream kernel? Olga has seen issues around no CLOSE being sent - it is really hard to reproduce…. —>Andy > On Jul 7, 2016, at 6:49 AM, Mkrtchyan, Tigran <tigran.mkrtchyan@xxxxxxx> wrote: > > > > Dear NFS folks, > > we observe orphan open-states on our deployment with nfsv4.1. > Our setup - two client nodes, running RHEL-7.2 with kernel > 3.10.0-327.22.2.el7.x86_64. Both nodes running ownCloud (like > a dropbox) which nfsv4.1 mounts to dCache storage. Some clients > connected to node1, others to node2. > > Time-to-time we see some 'active' transfers on data our DS > which do nothing. There is a corresponding state on MDS. > > I have traced one one such cases: > > - node1 uploads the file. > - node2 reads the file couple of times, OPEN+LAYOUTGET+CLOSE > - node2 sends OPEN+LAYOUTGET > - there is no open file on node2 which points to it. > - CLOSE never send to the server. > - node1 eventually removes the removes the file > > We have many other cases where file is not removed, but this one I was > able to trace. The link to capture files: > > https://desycloud.desy.de/index.php/s/YldowcRzTGJeLbN > > We had ~ 10^6 transfers in last 2 days and 29 files in such state (~0.0029%). > > Tigran. ��.n��������+%������w��{.n�����{��w��� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
