+++ This bug was initially created as a clone of Bug #2041610 +++

When the virt-install of an 8.6 aarch64 guest is complete and we are asked whether we want to reboot and reply 'yes', one gets:

[  OK  ] Started Reboot.
[  OK  ] Reached target Reboot.
dracut Warning: Killing all remaining processes
Rebooting.
[ 7478.584400] reboot: Restarting system

ERROR    internal error: cannot parse process status data for pid '99994/0'

The VM gets stopped.

Then it is possible to start it again but the guest should reboot without this user involvement.

--- Additional comment from Eric Auger on 2022-01-17 22:10:52 CET ---

on Fujitsu machine installed with RHEL-8.6.0-20220116.d.0 BaseOS aarch64

start:

sudo virt-install --name aarch64-vm0-rhel8.6 --ram 32768 --accelerate --virt-type kvm --arch=aarch64 --vcpus=48 --disk size=40,pool=vm --location http://download.eng.bos.redhat.com/rhel-8/composes/RHEL-8/RHEL-8.6.0-20220116.d.0/compose/BaseOS/aarch64/os --os-type linux  --os-variant rhl8.0 --check-cpu --network default

Host has:

Linux fujitsu-fx700-01-n01.2a2m.lab.eng.bos.redhat.com 4.18.0-359.el8.kpq0.aarch64
Name         : libvirt
Version      : 8.0.0
Release      : 1.module+el8.6.0+13888+55157bfb

Name         : virt-install
Version      : 3.2.0
Release      : 2.el8

qemu-kvm.aarch64   15:6.2.0-2.module+el8.6.0+13738+17338784

--- Additional comment from Peter Krempa on 2022-01-18 09:16:27 CET ---

Seems to be caused by:

commit 938382b60ae5bd1f83b5cb09e1ce68b9a88f679a
Author: Ani Sinha <ani>
Date:   Tue Jan 11 15:50:43 2022 +0530

    report error when virProcessGetStatInfo() is unable to parse data
    
    Currently virProcessGetStatInfo() always returns success and only logs error
    when it is unable to parse the data. Make this function actually report the
    error and return a negative value in this error scenario.
    
    Fix the callers so that they do not override the error generated.
    Also fix non-linux implementation of this function so as to report error.
    
    Signed-off-by: Ani Sinha <ani>
    Signed-off-by: Michal Privoznik <mprivozn>
    Reviewed-by: Michal Privoznik <mprivozn>

[...]

diff --git a/src/util/virprocess.c b/src/util/virprocess.c
index b559a4257e..85d8c8e747 100644
--- a/src/util/virprocess.c
+++ b/src/util/virprocess.c
@@ -1784,7 +1784,10 @@ virProcessGetStatInfo(unsigned long long *cpuTime,
         virStrToLong_ullp(proc_stat[VIR_PROCESS_STAT_STIME], NULL, 10, &systime) < 0 ||
         virStrToLong_l(proc_stat[VIR_PROCESS_STAT_RSS], NULL, 10, &rss) < 0 ||
         virStrToLong_i(proc_stat[VIR_PROCESS_STAT_PROCESSOR], NULL, 10, &cpu) < 0) {
-        VIR_WARN("cannot parse process status data");
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("cannot parse process status data for pid '%d/%d'"),
+                       (int) pid, (int) tid);
+        return -1;
     }

     /* We got jiffies

--- Additional comment from Michal Privoznik on 2022-01-18 12:46:00 CET ---

Ooops, revert proposed on the list:

https://listman.redhat.com/archives/libvir-list/2022-January/msg00778.html

--- Additional comment from Yiding Liu (Fujitsu) on 2022-01-20 09:42:56 CET ---

Pre-Verify: PASS
I backport the fix to libvirt-8.0.0-1.module+el8.6.0+13888+55157bfb.src.rpm and the error was gone.

```
# virt-install --connect qemu:///system -l /var/lib/libvirt/boot/RHEL-8.6.0-20220108.3-BaseOS-aarch64-boot.iso  --os-variant rhel8-unknown -n debug --memory 4096 --machine virt --vcpus 4 --disk /var/lib/libvirt/images/debug.qcow2
[snip]

dracut Warning: Killing all remaining processes
Rebooting.
[  141.619939] reboot: Restarting system

Domain creation completed.
Restarting guest.
Running text console command: virsh --connect qemu:///system console debug
Connected to domain 'debug'
Escape character is ^] (Ctrl + ])

```

--- Additional comment from Michal Privoznik on 2022-01-20 17:54:49 CET ---

Pushed into master as:

commit 105dace22cc7b5b18d72a4dcad4a2cf386ce5c99
Author:     Michal Prívozník <mprivozn>
AuthorDate: Tue Jan 18 12:40:09 2022 +0100
Commit:     Michal Prívozník <mprivozn>
CommitDate: Thu Jan 20 17:51:07 2022 +0100

    Revert "report error when virProcessGetStatInfo() is unable to parse data"
    
    This reverts commit 938382b60ae5bd1f83b5cb09e1ce68b9a88f679a.
    
    Turns out, the commit did more harm than good. It changed
    semantics on some public APIs. For instance, while
    qemuDomainGetInfo() previously did not returned an error it does
    now. While the calls to virProcessGetStatInfo() is guarded with
    virDomainObjIsActive() it doesn't necessarily mean that QEMU's
    PID is still alive. QEMU might be gone but we just haven't
    realized it (e.g. because the eof handler thread is waiting for a
    job).
    
    Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2041610
    Signed-off-by: Michal Privoznik <mprivozn>
    Reviewed-by: Andrea Bolognani <abologna>

v8.0.0-129-g105dace22c