Reuben,
On Sunday, July 17, 2016 04:18:45 PM Reuben Farrelly wrote:
I've been seeing periodic entries in my dovecot logs like this:
dovecot[3464]: dsync-server(kaylene): Error: Couldn't lock /home/kaylene/.dovecot-sync.lock: Timed out after 30 seconds: 3 Time(s) dovecot[3464]: dsync-server(reuben): Error: Couldn't lock /home/reuben/.dovecot-sync.lock: Timed out after 30 seconds: 1 Time(s)
They occur several times per day, but don't appear to have any obvious cause and I am not aware of any problems this is causing. [They could be the cause of some reappearing UID type messages that also periodically are logged, but I can't be sure]
They occur on a lightly loaded Linode VM, KVM Paravirtualised and with only local SSD disk storage. The VM is a Gentoo Linux VM running the latest kernels that Linode provide. I also saw this problem under Xen.
I am running the same, Gentoo, replicating Dovecot, on Linode VMs. Only difference is I am using NFS, it seems you are using local disk. I have never had issues like your experiencing. My mail VMs get pretty loaded at times due ASSP and mail volume. I would not think it to be load related what so ever.
If you feel it might be specific to that VM you might request Linode move it to a new host machine. I have had one of my mail servers have some issues before and it was host related. Linode opened a ticket and migrated it about the time I got the first Nagios notification. If you get Linode to migrate the VM and it continues, you can rule out the host at least.
Is this a common warning to see in cloud hosted/shared environments?
Not to my knowledge, I have never seen that error before.
-- William L. Thomson Jr. Obsidian-Studios, Inc. http://www.obsidian-studios.com