Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Bug 1072062

Summary:

Ruby bindings for libguestfs throws an error periodically

Product:

Red Hat Enterprise Linux 6

Reporter:

Timothy Williams <tiwillia>

Component:

libguestfs

Assignee:

Pino Toscano <ptoscano>

Status:

CLOSED ERRATA

QA Contact:

Virtualization Bugs <virt-bugs>

Severity:

medium

Docs Contact:

Priority:

unspecified

Version:

6.5

CC:

huzhan, leiwang, lkong, mbooth, ptoscano, rjones, wshi, yuliu

Target Milestone:

Target Release:

---

Hardware:

x86_64

OS:

Linux

Whiteboard:

Fixed In Version:

libguestfs-1.20.11-3.el6

Doc Type:

Bug Fix

Doc Text:

Cause: The Guestfs.new constructor in the Ruby binding was not implemented properly. Consequence: Creating a new Guestfs instance in Ruby would often result in an error. Fix: Rework the implementation of Guestfs.new Result: Guestfs.new works correctly.

Story Points:

---

Clone Of:

Clones:

1072079 (view as bug list)

Environment:

Last Closed:

2014-10-14 06:35:09 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:

1046509

Bug Blocks:

Attachments:

Description	Flags
0001-ruby-Fix-.new-method-RHBZ-1046509.patch	none
0002-run-Use-timeout-foreground-option.patch	none
0003-run-Actually-use-timeout-foreground-option-RHBZ-1025.patch	none

Description Timothy Williams 2014-03-03 19:58:29 UTC

Description of problem:
About 50% of the time, Creating a new Guestfs object with the ruby libguestfs bindings will fail with an Argument error:

[root@stendarr ~]# irb -rguestfs
irb(main):062:0> Guestfs::Guestfs.new
ArgumentError: expecting 0 or 1 arguments
	from (irb):62:in `new'
	from (irb):62
	from :0
irb(main):063:0> exit

[root@stendarr ~]# irb -rguestfs
irb(main):001:0> Guestfs::Guestfs.new
=> #<Guestfs::Guestfs:0x7f32e73b02b0>

Version-Release number of selected component (if applicable):
# rpm -qa | grep libguestfs
libguestfs-1.20.11-2.el6.x86_64
libguestfs-tools-1.20.11-2.el6.x86_64
ruby-libguestfs-1.20.11-2.el6.x86_64
libguestfs-tools-c-1.20.11-2.el6.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Create a new guestfs object with Guestfs::Guestfs.new()

Actual results:
irb(main):062:0> Guestfs::Guestfs.new
ArgumentError: expecting 0 or 1 arguments
	from (irb):62:in `new'
	from (irb):62
	from :0

Expected results:
irb(main):001:0> Guestfs::Guestfs.new
=> #<Guestfs::Guestfs:0x7f32e73b02b0>

Additional info:
Using the pry gem to show-method, we see the same thing being called each time:

[1] pry(main)> Guestfs::Guestfs.new
ArgumentError: expecting 0 or 1 arguments
from (pry):1:in `new'
[2] pry(main)> show-method Guestfs::Guestfs.new

From: object.c (C Method):
Owner: Class
Visibility: public
Number of lines: 3

VALUE
rb_class_new_instance(argc, argv, klass)
int argc;

[root@stendarr ~]# pry -rguestfs
[1] pry(main)> Guestfs::Guestfs.new
=> #<Guestfs::Guestfs:0x7f1fe442f058>
[2] pry(main)> show-method Guestfs::Guestfs.new

From: object.c (C Method):
Owner: Class
Visibility: public
Number of lines: 3

VALUE
rb_class_new_instance(argc, argv, klass)
int argc;

Comment 2 Richard W.M. Jones 2014-03-03 20:43:37 UTC

Reproducer:

while ! echo 'Guestfs::Guestfs.new' | irb -rguestfs | grep -sq ArgumentError; do echo -n .; done

(That command is all on a single line)

If you see a line of dots being printed, then everything is working OK.

If you see a few dots and then it stops, then you have hit the bug.

On RHEL 6 it exits after a few dots.  Upstream (Fedora 20) it keeps
printing dots.

Comment 3 Richard W.M. Jones 2014-03-03 21:10:58 UTC

I thought I'd seen this before, and it is in fact fixed
upstream by this commit which fixes bug 1046509.

https://github.com/libguestfs/libguestfs/commit/ee4ce2a0298d012bd8c500c35dc50e1f53e88c8b

Actually 3 commits are required to make the tests work
properly.  I will attach them, rebased on RHEL 6.5.

Comment 4 Richard W.M. Jones 2014-03-03 21:11:52 UTC

Created attachment 870129 [details]
0001-ruby-Fix-.new-method-RHBZ-1046509.patch

Comment 5 Richard W.M. Jones 2014-03-03 21:12:45 UTC

Created attachment 870130 [details]
0002-run-Use-timeout-foreground-option.patch

Comment 6 Richard W.M. Jones 2014-03-03 21:13:04 UTC

Created attachment 870131 [details]
0003-run-Actually-use-timeout-foreground-option-RHBZ-1025.patch

Comment 7 bfan 2014-03-04 06:13:36 UTC

Reproduced with libguestfs-1.20.11-2.el6.x86_64

It can print a few dots and then stops, sometimes there's no output 

[root]# while ! echo 'Guestfs::Guestfs.new' | irb -rguestfs | grep -sq ArgumentError; do echo -n .; done
[root]# while ! echo 'Guestfs::Guestfs.new' | irb -rguestfs | grep -sq ArgumentError; do echo -n .; done
.[root]#while ! echo 'Guestfs::Guestfs.new' | irb -rguestfs | grep -sq ArgumentError; do echo -n .; done
[root]# while ! echo 'Guestfs::Guestfs.new' | irb -rguestfs | grep -sq ArgumentError; do echo -n .; done
.[root]# while ! echo 'Guestfs::Guestfs.new' | irb -rguestfs | grep -sq ArgumentError; do echo n .; done
......[root@amd-1216-8-3 home]

Comment 9 bfan 2014-05-14 02:51:36 UTC

Verified with libguestfs-1.20.11-3.el6.x86_64

# while ! echo 'Guestfs::Guestfs.new' | irb -rguestfs | grep -sq ArgumentError; do echo -n .; done
..................................................................................................................................................................................................................................

Can see a line of dots be printed, match the expect result

Comment 10 errata-xmlrpc 2014-10-14 06:35:09 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2014-1458.html