Package: nbd-server Version: 1:2.9.11-3 In an automatic test system (used by xen upstream) I encountered this failure:
Jan 25 16:12:36 leaf-beetle nbd_server[20034]: Read failed: Bad address Jan 25 16:12:36 leaf-beetle nbd_server[20033]: Child exited with 1 The client naturally then saw a series of IO failures and was generally very unhappy. The problem is not easily reproducible. I have seen similar failures before but they are very infrequent. The configuration in this case was: * Two NBDs: each one of an LVM volume on the server imported by the client * Each LVM VG backed by a single PV on a physical disk partition * Both hosts' hardware: rackservers.com AMD-based server * Both hosts' userland: amd64 lenny userland * Both hosts' kernel: Xen-enabled xen.org kernel derived from 2.6.32.27 * Both hosts' hypervisor: xen-unstable 4.1.0 RC2+ * nbd server hostname: leaf-beetle * nbd client hostname: potato-beetle Full logs can be found here for the next few weeks: http://www.chiark.greenend.org.uk/~xensrcts/logs/5238/test-amd64-amd64-pair/info.html I appreciate that this isn't very much to go on. If you would like to suggest some additional instrumentation, or additional logs to capture, I will be happy to add that to my test machinery and then report the results as and when the bug recurs. Thanks, Ian. Here is a copy of the /etc/nbd-server/config from the server: # generated by ./ts-guests-nbd-mirror [generic] user = root [export0] exportname = /dev/leaf-beetle.cam.xci-test.com/debian.guest.osstest-disk port = 4000 [export1] exportname = /dev/leaf-beetle.cam.xci-test.com/debian.guest.osstest-swap port = 4001 -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
