smbd ports(139 and 445) are not listening on samba-4.4.9

[shivappa Sangapur]

Hi List,

samba version-4.4.9.
This looks very strange issue.
I have observed a issue where smbd ports are not listening after starting
samba.
"pgrep smbd" shows the process IDs but when accessed the fileshare
"connection refused" error is returned.
When checked the 'netstat -plan' for smbd no ports are listening on smbd
(139 and 445)
output of netstat -plan | grep smbd
unix  2      [ ]         DGRAM                    28684    6264/smbd          
/samba/msg.sock/6264
unix  2      [ ]         DGRAM                    27698    6226/smbd          
/samba/msg.sock/6226
unix  2      [ ]         DGRAM                    27631    6220/smbd          
/samba/msg.sock/6220
unix  2      [ ]         DGRAM                    27638    6225/smbd          
/samba/msg.sock/6225

but nmbd ports are listening (137,138)
Output of netstat -plan | grep nmbd
udp        0      0 172.16.255.255:137      0.0.0.0:*                          
6105/nmbd
udp        0      0 172.16.105.39:137       0.0.0.0:*                          
6105/nmbd
udp        0      0 0.0.0.0:137             0.0.0.0:*                          
6105/nmbd
udp        0      0 172.16.255.255:138      0.0.0.0:*                          
6105/nmbd
udp        0      0 172.16.105.39:138       0.0.0.0:*                          
6105/nmbd
udp        0      0 0.0.0.0:138             0.0.0.0:*                          
6105/nmbd
unix  2      [ ]         DGRAM                    26591    6105/nmbd          
/samba/msg.sock/6105
unix  2      [ ACC ]     STREAM     LISTENING     26619    6105/nmbd          
/samba/nmbd/unexpected

No errors are logged in log.smbd.
Only 'smbd version started... Copyright' log is logged.

After restarting samba service everything works fine from then.

This is not always reproducible.
(Observed only thrice)

Could you please suggest me what are the possible cases for this issue.
Is there any case where smbd is waiting for any events to start listening on
smbd ports after process is forked.

Your suggestions are highly appreciable.

Thanks & Regards,
Shivappa



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