Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-azure (Ubuntu Bionic)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1766857
Title:
[Hyper-V] KVP daemon fails to start
Status in linux package in Ubuntu:
Confirmed
Status in linux-azure package in Ubuntu:
Confirmed
Status in linux source package in Bionic:
Confirmed
Status in linux-azure source package in Bionic:
Confirmed
Bug description:
While testing Bionic daily build with kernel 4.15.0-20-generic we saw
that there are 2 issues with the KVP daemon:
1. KVP daemon crashes after approximatively 2 minutes of uptime and it enters
in a failed state. The daemon can be manually started and it enters back in
active (running) state.
The error messages from /var/log/syslog after the daemon enters the failed
state are the following:
Apr 25 04:28:46 bionicDaily KVP: read failed; error:9 Bad file descriptor
Apr 25 04:28:46 bionicDaily systemd[1]: hv-kvp-daemon.service: Main process
exited, code=exited, status=1/FAILURE
Apr 25 04:28:46 bionicDaily systemd[1]: hv-kvp-daemon.service: Failed with
result 'exit-code'.
Apr 25 04:28:59 bionicDaily systemd[1]: Started Hyper-V KVP Protocol Daemon.
Note: There was a simmilar issue discussed on this thread
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1664663, but the
fixing commit seems to be inclued in this Bionic build.
2. After the KVP daemon is being started the following messages
appear:
Apr 25 04:45:25 bionicDaily hv_kvp_daemon[1895]: sh: 1:
/usr/libexec/hypervkvpd/hv_get_dns_info: not found
Apr 25 04:45:25 bionicDaily hv_kvp_daemon[1895]: sh: 1:
/usr/libexec/hypervkvpd/hv_get_dhcp_info: not found
The above binaries are present on the system, but the their actual
path is /usr/sbin/hv_get_dns_info and /usr/sbin/hv_get_dhcp_info.
Either the hv_get_dhcp_info and hv_get_dns_info binaries should be
placed in the location where the daemon is looking for
(/usr/libexec/hypervkvpd/), or the daemon should be set to search for
the binaries in the /usr/sbin directory.
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