[Samba] Share inaccessible intermittently and often - restarting smb cures for short time

[Rich Webb]

Additional Information:

This is happening on both a Windows 7 client and a Windows 10 client both of which are joined to the domain.  Seems to be some sort of file locking issue but it is happening at the share level - before I even attempt to access or write a file. 

On a different server running Samba 4.9.2 and a relatively similar setup (same build commands but running on CentOS 7) I do not have this issue. 

> Ok increased logging and got the error here is what got logged:
> 
> 2020/04/23 14:03:17.514132,  3]
> ../../source3/smbd/smb2_server.c:3274(smbd_smb2_request_error_ex)
>  smbd_smb2_request_error_ex: smbd_smb2_request_error_ex: idx[1]
>  status[NT_STATUS_SHARING_VIOLATION] || at ../../source3/smbd/smb2_create.c:334
> [2020/04/23 14:03:17.514206,  3]
> ../../source3/smbd/smb2_server.c:3274(smbd_smb2_request_error_ex)
>  smbd_smb2_request_error_ex: smbd_smb2_request_error_ex: idx[5]
>  status[NT_STATUS_FILE_CLOSED] || at ../../source3/smbd/smb2_server.c:2635
> [2020/04/23 14:03:17.523861,  3]
> ../../source3/smbd/smb2_server.c:3274(smbd_smb2_request_error_ex)
>  smbd_smb2_request_error_ex: smbd_smb2_request_error_ex: idx[1]
>  status[NT_STATUS_SHARING_VIOLATION] || at ../../source3/smbd/smb2_create.c:334
> [2020/04/23 14:03:17.525350,  3]
> ../../source3/smbd/smb2_server.c:3274(smbd_smb2_request_error_ex)
>  smbd_smb2_request_error_ex: smbd_smb2_request_error_ex: idx[1]
>  status[NT_STATUS_SHARING_VIOLATION] || at ../../source3/smbd/smb2_create.c:334
> 
> Rich
> 
>> Sorry it defaulted to sending direct to you - here it is to the list.
>> 
>>> OS is CentOS 8
>>> 
>>> I was thinking about the possibility of using the version in the base repo for
>>> the file server since I don't need ADDC for the file server.  I just need the
>>> ability to join.
>>> 
>>> Here is my configure command that I used to configure the source:
>>> 
>>> ./configure \
>>> --disable-cups \
>>> --without-ldb-lmdb \
>>> --prefix=/opt/samba \
>>> --sysconfdir=/etc/samba \
>>> --localstatedir=/var \
>>> --with-lockdir=/var/lib/samba/lock \
>>> --with-piddir=/run/samba \
>>> --with-systemd \
>>> --systemd-install-services \
>>> --with-logfilebase=/var/log/samba
>>> 
>>> Nothing really outstanding...
>>> 
>>> Thanks,
>>> Rich
>>> 
>>> ----- On Apr 23, 2020, at 1:33 PM, samba samba at lists.samba.org wrote:
>>> 
>>>> On 23/04/2020 17:58, Rich Webb via samba wrote:
>>>>> Hello,
>>>>>
>>>>> I'm running Samba 4.12.1 both as a domain controller on one box (DC1) and as a
>>>>> joined member on another box for a file server (FS1).
>>>>>
>>>>> I have three shares on FS1 and intermittently I am getting a message that says
>>>>> "\\fs1\shared is not accessible. You might not have permissions to use this
>>>>> network resource. Contact the administrator of this server to find out if you
>>>>> have access permissions. The process cannot access the file because it is being
>>>>> used by another process."
>>>>>
>>>>> Now when this is happening on one share it might not be on one of the other two.
>>>>> Sometimes it happens on all of them. This morning I copied a file over to
>>>>> shared and the copy completed but the window didn't update and the file did not
>>>>> show up so I went to refresh the screen and got the error. If I wait long
>>>>> enough or go back and forth between different shares it will again become
>>>>> accessible but when I go to FS1 and restart the smb service I can again access
>>>>> it. It is happening very frequently. Almost every time I want to use the server
>>>>> for something.
>>>>>
>>>>> Both of these installs were built from source. If you need the configure
>>>>> commands I used I can provide that as well.
>>>> Yes please ;-)
>>>> 
>>>> There is nothing really wrong with your smb.conf files, except I would
>>>> remove the 'winbind enum' lines from FS1, all they really do is to slow
>>>> things down. I would also add 'winbind refresh tickets = Yes' to FS1.
>>>> 
>>>> After this, you may have to raise the log level on FS1 to see if
>>>> anything pops out.
>>>> 
>>>> What OS is this ?
>>>> 
>>>> Rowland
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
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