Jeff,
That number of warnings is fairly normal. At least for the “attempting MIRRORS if available” messages. If something is required for the image and it fails to fetch the build will fail with an error.
I am not sure about the populate_sysroot warnings. It appears that there is no populate_sysroot in the bitbake recipes for those pieces of software. It may be that the bitbake cache is messed up somehow. Have you tried rebuilding from scratch?
Jeff