Ceph » Linux kernel client

No I don't think that's the issue.

The problem lies in this function, defined in xfstests "common.attr":
_sort_getfattr_output() {
awk '{a[FNR]=$0}END{n = asort(a); for(i=1; i <= n; i++) print a[i]"\n"}' RS=''
}

asort() is a gawk built-in function that sorts an array and replaces
its index values with sequential integers.

Apparently it is not available in the version of awk running on the machine
that hit this failure.

I logged in to plana13 (one of them in this run) to see, and it appears to me
that /usr/bin/awk is probably "mawk" whatever that is. I believe xfstests is
expecting to use "gawk", which is Gnu Awk.

My Ubuntu system has Gnu Awk. I have no idea why "mawk" is installed here.