Bug 1223735

Summary: fedup is stuck at "Switching root" with older systemd from F21
Product: [Fedora] Fedora Reporter: Kamil Páral <kparal>
Component: fedupAssignee: Will Woods <wwoods>
Status: CLOSED WONTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 22CC: tflink, wwoods, zbyszek
Target Milestone: ---Keywords: CommonBugs
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: https://fedoraproject.org/wiki/Common_F22_bugs#fedup-hang-old-systemd
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-10-19 16:03:19 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
fedup stuck on upgrade
none
systemd debug journal from stuck upgrade process none

Description Kamil Páral 2015-05-21 11:17:08 UTC 
Created attachment 1028086 [details]
fedup stuck on upgrade

Description of problem:
Some of my F21->F22 upgrades got stuck early in the upgrade process boot on this message:

> upgrade-prep.sh[xxx]: upgrade prep complete, switching root...
> systemd-coredump[xxx]: Failed to log coredump: Connection refused

The last line is not always printed. A screenshot is attached. Or, if splash is active, it just blinks for eternity. Hard reset is required.

After a long time of debugging, I have figured out that this only happens with an original F21 version of systemd. If your system is updated, this problem does not happen. This seems to be 100% reliable.

In order to save our users unwelcome surprises, I suggest making F21 version of fedup require the newer version of systemd explicitly, i.e. Requires: systemd >= 216-24.fc21.


Version-Release number of selected component (if applicable):
F22 RC2 (fedup-dracut-0.9.2-1.fc22)
broken version: systemd-216-12.fc21.x86_64
fixed version: systemd-216-24.fc21.x86_64

How reproducible:
always

Steps to Reproduce:
1. install F21 from an offline medium (so that it does not get updated). minimal is enough.
2. try to update it with `fedup --network 22 --instrepo http://dl.fedoraproject.org/pub/alt/stage/22_RC2/Server/x86_64/os/`
3. see it get stuck during upgrade initialization
4. reboot back to F21
5. update systemd
6. re-run fedup to create a new grub menu item
7. run upgrade, see it work this time
Comment 1 Kamil Páral 2015-05-21 11:18:34 UTC 
Created attachment 1028087 [details]
systemd debug journal from stuck upgrade process

A journal with systemd debug info from the upgrade process where fedup got stuck, in case someone is interested.
Comment 2 Kamil Páral 2015-05-25 07:31:13 UTC 
Tomorrow is the release day. We need to move on this quickly. Will, do you have any concerns with this patch? Can you please rebuild it with the spec file change? Thanks!
Comment 3 Will Woods 2015-10-19 16:03:19 UTC 
Since F20 is EOL and fedup is obsoleted in F21+, this bug is kind of moot now.

If you happen to encounter it, the workaround is easy: update systemd.