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Created attachment 933011 [details]
Sample patch prepared for rpmbuild

Description of problem:

The bugfix (commit 1036f3d93311f7521ba2ef56a83d74a0b7ac2e36 in samba.git) implemented for bug report 9422 in upstream hasn't been backported to samba4-4.0.0 package.

Steps to Reproduce:

1. Install the latest available samba4 version (samba4-libs-4.0.0-63);
2. Configure simple public CIFS share;
3. Connect to share using GNU/Linux OS using cifs kernel module with unix extensions support (tested with Ubuntu 12.04.5 and Ubuntu 14.04.1);
4. Copy a file from the share to local storage.

Actual results:

Copy process hangs for 2-3 minutes and the error message 'CIFS VFS: Server has not responded in 120 seconds. Reconnecting...' appears in syslog.

Expected results:

Copy process process should complete without delays and errors.

Additional info:

I rebuilt the related SRPM package adding the attached patch, the problem is fixed.

Please use the Samba 3.6 package for file serving. samba4 is a tech preview and not supported in this case. The issue has been fixed in the standard samba package!

Andreas, thank you for the advise and sorry for the time spent reading the report!

I didn't know that samba4 is tech preview package. I've been using the samba4 package for a year in production as a workaround of bug 1136101.

Talk to your support contact and ask him about details for hotfixes.

Thank you for support. I'm not an RH customer. I've already fixed the problem using rpmbuild and patches provided. Just wanted to make CentOS distribution better.