Created attachment 1116298 [details] libguestfs-test-tool output Description of problem: Periodically virt-builder fails with the following error when running as non-root users: virt-builder: error: libguestfs error: could not connect to libvirt (URI = qemu:///session): Cannot write data: Transport endpoint is not connected [code=38 domain=7] Version-Release number of selected component (if applicable): I'm using the latest version in F23, which at the moment is 1.32.0-1.fc23. One of my colleagues sees the exact same issue in RHEL7 w/ 1.28.1-1.55.el7. How reproducible: It happens regularly when using virt-builder as non-root users -- nothing fancy ... just --hostname, --run-command, --firstboot; however, it never happens twice in a row -- i.e., if I run the exact same virt-builder cmd right after the error, it always succeeds the second time. Additional info: See attached files for `libguestfs-test-tool` and `virt-builder -v -x` output.
Created attachment 1116299 [details] virt-builder -v -x output
Fixed if you build libvirt-1.3.1-1.fc24 which is now in dist-git (but not yet built in Rawhide). http://koji.fedoraproject.org/koji/packageinfo?packageID=91 *** This bug has been marked as a duplicate of bug 1271183 ***
Hmmm. Thanks for the heads-up rwmj. After reading that I better understand the problem. I can work-around it in my app that calls virt-builder. Cheers.
You shouldn't need to work around anything. Is there a reason not to use the fixed libvirt and/or patch libvirt with the fixes? You'll also find this thread useful: https://www.redhat.com/archives/libvir-list/2016-January/thread.html#00502