Red Hat Bugzilla – Bug 143803
ip_conntrack_amanda module causes amanda hangs
Last modified: 2015-01-04 17:14:32 EST
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.5) Gecko/20041111 Firefox/1.0 Description of problem: I'm refiling Bug 142745, as I've seen more evidence that this is a kernel issue rather than an Amanda issue. amcheck works fine, but amdump hangs forever. Disk archive files are zero-length, and amanda-related processes have consumed zero time after 15 hours. I believe the problem started with a recent kernel upgrade in FC2, but I have upgraded the server to FC3 and the problem persists. The amanda configuration has not changed. There is plenty of space on my holding disk filesystem. Version-Release number of selected component (if applicable): kernel-2.6.9-1.681_FC3 How reproducible: Always Steps to Reproduce: 1. Set up remote backup with amanda. chkconfig amanada on. Open firewall ports for all amanda processes. Include "ip_conntrack_amanda" iptables module. 2. Run amcheck. 3. Run amdump. Actual Results: amcheck works perfectly. amdump starts but hangs forever. Expected Results: amcheck works perfectly. amdump copies files across the network to disk holding area (and eventually dumps to tape). Additional info: This message at the Amanda FAQ-O-Matic appears to address this issue: http://amanda.sourceforge.net/fom-serve/cache/426.html I'm going to set the severity high, as I have no functioning backup systems so loss of data is a serious risk. If this is an abuse of the severity rating, please feel free to set it back down.
I can confirm this for at least 2 boxes, one with Fedora Core 2 (2.6.9-1.6_FC2) and one with Fedora Core 3 (2.6.9-1.681_FC3) kernel. Problem is caused, if "ip_conntrack_amanda" is loaded on client side (the box which should be backup), regardless rules in iptables. See also: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=142745
I may report that using kernel 2.6.10-1.737_FC3 on FC3 and kernel-2.6.10-1.8_FC2 on FC2 this issue is fixed.