Hi Chris, Thanks for investigating. I've tried again to confirm the problem still occurs -- and it does, although sometimes it takes multiple restarts of the hv-kvp-daemon.service for it to start successfully.
Some diagnostic information is below. Welcome to Ubuntu 16.04.2 LTS (GNU/Linux 4.4.0-62-generic x86_64) user@server:~$ ps -ax | grep hv 129 ? S< 0:00 [hv_vmbus_con] 359 ? S 0:00 [hv_balloon] 601 ? Ss 0:00 /usr/lib/linux-tools/4.4.0-62-generic/hv_vss_daemon -n 603 ? Ss 0:00 /usr/lib/linux-tools/4.4.0-62-generic/hv_fcopy_daemon -n user@server:~$ sudo systemctl status hv-kvp-daemon.service ● hv-kvp-daemon.service - Hyper-V KVP Protocol Daemon Loaded: loaded (/lib/systemd/system/hv-kvp-daemon.service; enabled; vendor preset: enabled) Active: failed (Result: exit-code) since Thu 2017-03-09 20:50:24 UTC; 4min 45s ago Process: 585 ExecStart=/usr/sbin/hv_kvp_daemon -n (code=exited, status=1/FAILURE) Main PID: 585 (code=exited, status=1/FAILURE) Mar 09 20:49:24 server systemd[1]: Started Hyper-V KVP Protocol Daemon. Mar 09 20:49:24 server KVP[585]: KVP starting; pid is:585 Mar 09 20:49:24 server KVP[585]: KVP LIC Version: 3.1 Mar 09 20:50:24 server KVP[585]: read failed; error:9 Bad file descriptor Mar 09 20:50:24 server systemd[1]: hv-kvp-daemon.service: Main process exited, code=exited, status=1/FAILURE Mar 09 20:50:24 server systemd[1]: hv-kvp-daemon.service: Unit entered failed state. Mar 09 20:50:24 server systemd[1]: hv-kvp-daemon.service: Failed with result 'exit-code'. user@server:~$ dpkg -s linux-tools-4.4.0-62-generic Package: linux-tools-4.4.0-62-generic Status: install ok installed Priority: optional Section: devel Installed-Size: 250 Maintainer: Ubuntu Kernel Team <kernel-t...@lists.ubuntu.com> Architecture: amd64 Source: linux Version: 4.4.0-62.83 Depends: linux-tools-4.4.0-62 Description: Linux kernel version specific tools for version 4.4.0-62 This package provides the architecture dependant parts for kernel version locked tools (such as perf and x86_energy_perf_policy) for version 4.4.0-62 on 64 bit x86. user@server:~$ dpkg -s linux-cloud-tools-4.4.0-62-generic Package: linux-cloud-tools-4.4.0-62-generic Status: install ok installed Priority: optional Section: devel Installed-Size: 248 Maintainer: Ubuntu Kernel Team <kernel-t...@lists.ubuntu.com> Architecture: amd64 Source: linux Version: 4.4.0-62.83 Depends: linux-cloud-tools-4.4.0-62 Description: Linux kernel version specific cloud tools for version 4.4.0-62 This package provides the architecture dependant parts for kernel version locked tools for cloud for version 4.4.0-62 on 64 bit x86. Help > About Hyper-V Manager Hyper-V Manager Microsoft Corporation Version: 10.0.14393.0 vmms.exe Version 10.0.14393.351 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1664663 Title: [Hyper-V] kvp daemon start failure on Zesty Status in linux package in Ubuntu: In Progress Status in linux source package in Zesty: In Progress Bug description: Hello, On Ubuntu Server 17.04 daily from Febr 14th we see that the KVP daemon although it is enabled in systemd, it fails to start at system boot. This is shown by error: "KVP: read failed; error:9 Bad file descriptor" I then manually ran the kvp binary, it returned the KVP data, and it's also automatically loading at boot. However, this is of course not the normal behavior. 17.04 daily from Febr 14th is the first build we covered, so I cannot say if this is a regression introduced only at some point in 17.04 dailies. In syslog these are the only messages for KVP: Feb 14 08:01:22 ubuntu systemd[1]: Started Hyper-V KVP Protocol Daemon. Feb 14 08:01:22 ubuntu KVP: KVP starting; pid is:1837 Feb 14 08:01:22 ubuntu KVP: KVP LIC Version: 3.1 Feb 14 08:02:31 ubuntu KVP: read failed; error:9 Bad file descriptor systemd status: root@ubuntu:~# systemctl status hv-kvp-daemon.service ● hv-kvp-daemon.service - Hyper-V KVP Protocol Daemon Loaded: loaded (/lib/systemd/system/hv-kvp-daemon.service; enabled; vendor preset: enabled) Active: failed (Result: exit-code) since Tue 2017-02-14 08:02:31 PST; 1min 41s ago Main PID: 1837 (code=exited, status=1/FAILURE) CPU: 4ms Feb 14 08:01:22 ubuntu systemd[1]: Started Hyper-V KVP Protocol Daemon. Feb 14 08:01:22 ubuntu KVP[1837]: KVP starting; pid is:1837 Feb 14 08:01:22 ubuntu KVP[1837]: KVP LIC Version: 3.1 Feb 14 08:02:31 ubuntu systemd[1]: hv-kvp-daemon.service: Main process exited, code=exited, status=1/FAILURE Feb 14 08:02:31 ubuntu systemd[1]: hv-kvp-daemon.service: Unit entered failed state. Feb 14 08:02:31 ubuntu systemd[1]: hv-kvp-daemon.service: Failed with result 'exit-code'. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1664663/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
