After you upgrade to the new version will not start service. I got the error log: My system is CentOS 7. ==> /var/log/samba/log.samba <== [2016/09/14 13:08:47.129239, 0] ../source4/smbd/server.c:373(binary_smbd_main) samba version 4.4.5-SerNet-RedHat-31.el7 started. Copyright Andrew Tridgell and the Samba Team 1992-2016 [2016/09/14 13:08:47.380873, 0] ../lib/util/become_daemon.c:111(exit_daemon) STATUS=daemon failed to start: Samba failed to setup parent messaging, error code -1073741801 ==> /var/spool/mail/root <== ERROR(runtime): uncaught exception - (-1073741823, 'Undetermined error') File "/usr/lib64/python2.7/site-packages/samba/netcmd/__init__.py", line 175, in _run return self.run(*args, **kwargs) File "/usr/lib64/python2.7/site-packages/samba/netcmd/ntacl.py", line 239, in run lp, use_ntvfs=use_ntvfs) File "/usr/lib64/python2.7/site-packages/samba/provision/__init__.py", line 1618, in setsysvolacl set_gpos_acl(sysvol, dnsdomain, domainsid, domaindn, samdb, lp, use_ntvfs, passdb=s4_passdb) File "/usr/lib64/python2.7/site-packages/samba/provision/__init__.py", line 1523, in set_gpos_acl passdb=passdb) File "/usr/lib64/python2.7/site-packages/samba/provision/__init__.py", line 1486, in set_dir_acl setntacl(lp, path, acl, domsid, use_ntvfs=use_ntvfs, skip_invalid_chown=True, passdb=passdb, service=service) File "/usr/lib64/python2.7/site-packages/samba/ntacls.py", line 162, in setntacl smbd.set_nt_acl(file, security.SECINFO_OWNER | security.SECINFO_GROUP | security.SECINFO_DACL | security.SECINFO_SACL, sd, service=service) open: error=2 (No such file or directory)
Deleting files “/var/lib/samba/private/msg.sock” then restart service.