Bug 998485

Summary:	guestfish remote prints "libguestfs: error: waitpid (qemu): No child processes"
Product:	Red Hat Enterprise Linux 7	Reporter:	Richard W.M. Jones <rjones>
Component:	libguestfs	Assignee:	Richard W.M. Jones <rjones>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	7.0	CC:	acathrow, bfan, leiwang, linuxdev-bm, lsoft-mso-pj, ltroan, mbooth, moshiro, wshi, yoguma
Target Milestone:	rc	Keywords:	OtherQA
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:	QJ130807-012
Fixed In Version:	libguestfs-1.22.6-1.el7	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:	998482	Environment:
Last Closed:	2014-06-13 11:44:36 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:
Embargoed:
Bug Depends On:	998482
Bug Blocks:	839484

Description Richard W.M. Jones 2013-08-19 12:32:49 UTC

+++ This bug was initially created as a clone of Bug #998482 +++

Reported by: Kazuya Saito

Note for some reason that I cannot work out, this is only reproducible
in the libguestfs source directory.

(a) Checkout libguestfs from git and compile it in the usual way.

(b) make -C tests/guests check

(c) In one window, run:

  ./run ./fish/guestfish --listen --ro -a ./tests/guests/debian.img -i

This will print out (the number will be different):

  GUESTFISH_PID=13170; export GUESTFISH_PID

(d) In another window, run:

  GUESTFISH_PID=13170 ./run ./fish/guestfish --remote exit

In the first window you'll see an error:

  libguestfs: error: waitpid (qemu): No child processes

That is a bug.

Comment 1 Richard W.M. Jones 2013-08-19 12:59:23 UTC

Fixed upstream:
https://github.com/libguestfs/libguestfs/commit/a843b5e5e32c151e7b0c74bb4f7be1030f9ac85b

Comment 3 Can Zhang 2013-11-08 06:46:25 UTC

I installed libguestfs-1.22.2-1.el7, and ran `LIBGUESTFS_BACKEND=direct guestfish --listen --ro -a RHEL-Server-7.0-64-hvm.raw -i -v` in one terminal. Then opened a new terminal window and run `GUESTFISH_PID=8403 guestfish --remote exit`. And I saw error outputs from the first terminal:

# guestfish(8403): exit
libguestfs: closing guestfs handle 0x7fe56a024180 (state 2)
guestfsd: main_loop: proc 73 (mount_ro) took 0.10 seconds
guestfsd: main_loop: new request, len 0x28
umount /sysroot/boot
umount /sysroot
fsync /dev/sda
libguestfs: sending SIGTERM to process 8385
libguestfs: error: waitpid (qemu): No child processes
libguestfs: command: run: rm
libguestfs: command: run: \ -rf /tmp/libguestfsOIXqJe

And in a newer version, libguestfs-1.22.6-15.el7, no error message outputs.

Comment 4 Ludek Smid 2014-06-13 11:44:36 UTC

This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.