Created attachment 13665 [details]
samba log file during excel save

Overview:
We have two nodes CentOS 7.4 with replicated gluster volumes (centos-release-gluster312) shared to windows 7 clients with ctdb (samba 4.7.0).
Saving files on the share with certain ms office programs (powerpoint & excel, but not word) and MatLab freezes the program for a few minutes.


Steps to reproduce / what we did to end up here:
1. Basic installation of centos
2. compile samba 4.7.0 (./configure --with-cluster-support --with-shared-modules=idmap_tdb2,idmap_ad,vfs_glusterfs --with-systemd)
3. create gluster volume & join fileserver to active directory (also samba 4.7)

gluster volume info acltest

Volume Name: acltest
Type: Replicate
Volume ID: 7886c6d5-d0bc-421b-aa54-bc50499107b7
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Bricks:
Brick1: 172.17.1.3:/gluster/bricks/testbricks/acltest
Brick2: 172.17.1.4:/gluster/bricks/testbricks/acltest
Options Reconfigured:
transport.address-family: inet
nfs.disable: on
nfs-ganesha: disable
cluster.enable-shared-storage: enable


4. export volume via vfs_gluster:

testparm
# Global parameters
[global]
        netbios name = FILE
        realm = PI5.PHYSIK.UNI-STUTTGART.DE
        workgroup = PI5
        log file = /var/log/samba/tmp/samba_%I.log
        clustering = Yes
        registry shares = Yes
        load printers = No
        security = ADS
        deadtime = 10
        template homedir = /gluster/mnt/users/%U
        template shell = /bin/bash
        winbind refresh tickets = Yes
        winbind use default domain = Yes
        idmap config pi5:range = 20000-1999999
        idmap config pi5:backend = rid
        idmap config *:range = 10000-19999
        idmap config * : backend = tdb
        store dos attributes = Yes
        map acl inherit = Yes
        inherit acls = Yes
        vfs objects = acl_xattr

[acltest]
        comment = acltest
        path = /
        kernel share modes = No
        read only = No
        vfs objects = acl_xattr glusterfs
        glusterfs:loglevel = 9
        glusterfs:logfile = /var/log/samba/glusterfs-acltest.log
        glusterfs:volume = acltest

5. reload samba config and create new powerpoint/excel/matlab file in windows 7 (office 2016, matlab 2016b)
6. save file as, select ip/hostname of fileserver, navigate to exported volume

Actual Results:
Program freezes for few minutes, powerpoint/excel recovers and then saved the file, matlab does not recover.
smbstatus -u weller (during excel save, see log)

Samba version 4.7.0
PID     Username     Group        Machine                                   Protocol Version  Encryption           Signing          
----------------------------------------------------------------------------------------------------------------------------------------
0:11837 weller       domain users 172.16.3.101 (ipv4:172.16.3.101:58395)    SMB2_10           -                    -                

Service      pid     Machine       Connected at                     Encryption   Signing
---------------------------------------------------------------------------------------------
acltest      0:11837 172.16.3.101  Mon Oct  9 12:53:58 PM 2017 CEST -            -
users        0:11837 172.16.3.101  Mon Oct  9 11:20:10 AM 2017 CEST -            -

Locked files:
Pid          Uid        DenyMode   Access      R/W        Oplock           SharePath   Name   Time
--------------------------------------------------------------------------------------------------
0:11837      21127      DENY_WRITE 0x13019f    RDWR       LEASE(RWH)       /   ~$Book.xlsx   Mon Oct  9 12:54:02 2017
0:11837      21127      DENY_NONE  0x100080    RDONLY     NONE             /gluster/mnt/users   .   Mon Oct  9 12:50:50 2017
0:11837      21127      DENY_NONE  0x1000a0    RDONLY     NONE             /   .   Mon Oct  9 12:54:01 2017
0:11837      21127      DENY_NONE  0x100081    RDONLY     NONE             /   .   Mon Oct  9 12:54:02 2017


Expected Results:
Save file, responsive interface, MatLab should not crash.


Additional information:
Same volume exported via fuse mount works perfectly fine
mount:
172.17.1.4:/acltest on /gluster/mnt/acltest type fuse.glusterfs (rw,relatime,user_id=0,group_id=0,allow_other,max_read=131072)

smb.conf:
[acltest]
        comment = acltest
        path = /gluster/mnt/acltest
        kernel share modes = No
        read only = No