Note: This is a public test instance of Red Hat Bugzilla. The data contained within is a snapshot of the live data so any changes you make will not be reflected in the production Bugzilla. Email is disabled so feel free to test any aspect of the site that you want. File any problems you find or give feedback at bugzilla.redhat.com.
Bug 1471466 - dnf-makecache.service hangs and blocks dnf/yumex-dnf
Summary: dnf-makecache.service hangs and blocks dnf/yumex-dnf
Keywords:
Status: CLOSED DUPLICATE of bug 1470352
Alias: None
Product: Fedora
Classification: Fedora
Component: dnf
Version: 26
Hardware: All
OS: Linux
unspecified
high
Target Milestone: ---
Assignee: rpm-software-management
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-07-16 06:22 UTC by Lars S. Jensen
Modified: 2017-07-19 11:17 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-07-19 11:17:34 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)

Description Lars S. Jensen 2017-07-16 06:22:47 UTC
Description of problem:
dnf/yumex-dnf hands because the programs wait for dnf-makecache.service to finsh and release dnf lock

Version-Release number of selected component (if applicable):
dnf-2.5.1-1.fc26.noarch

How reproducible:

Steps to Reproduce:
1.
running 
dnf update
Hangs with:
Waiting for process with pid XXXXX to finish. 
2.systemctl status  dnf-makecache
  Loaded: loaded (/usr/lib/systemd/system/dnf-makecache.service; static; vendor
  Active: activating (start) since Sun 2017-07-16 06:49:08 CEST; 56min ago
Main PID: 17850 (dnf)
   Tasks: 1 (limit: 4915)
   CGroup: /system.slice/dnf-makecache.service
           └─17850 /usr/libexec/system-python /usr/bin/dnf makecache timer
3. restart 
systemctl restart  dnf-makecache 
and now systemctl restart hangs:-(

Additional info:
       dnf [options] makecache --timer

Change line 14 in  /usr/lib/systemd/system/dnf-makecache.service
-ExecStart=/usr/bin/dnf makecache timer
+ExecStart=/usr/bin/dnf makecache --timer

Then 
systemctl restart  dnf-makecache 
works and:
systemctl status  dnf-makecache
   Active: inactive (dead) since Sun 2017-07-16 08:01:10 CEST; 9min ago
  Process: 18950 ExecStart=/usr/bin/dnf makecache --timer (code=exited, status=0
 Main PID: 18950 (code=exited, status=0/SUCCESS)

Comment 1 Lars S. Jensen 2017-07-16 14:48:36 UTC
The old syntax was restored in dnf-2.5.1-1.fc26 or before, so it was not the solution. 

It is still hanging and seen on 2 machines and it is not reproducible every time it runs:

systemctl status  dnf-makecache
● dnf-makecache.service - dnf makecache
   Loaded: loaded (/usr/lib/systemd/system/dnf-makecache.service; static; vendor
   Active: activating (start) since Sun 2017-07-16 15:01:13 CEST; 1h 4min ago
 Main PID: 27522 (dnf)
    Tasks: 1 (limit: 4915)
   CGroup: /system.slice/dnf-makecache.service
           └─27522 /usr/libexec/system-python /usr/bin/dnf makecache --timer

Is should have a timeout so it don't block yumex-dnf in case of an issue.

Comment 2 Pascal Ernster 2017-07-18 15:57:29 UTC
I see this as well on several Fedora 25 machines.

According to "strace -f -p $PID" (with $PID being the pid that "systemctl status dnf-makecache" gives me), it hangs with FUTEX_WAIT_PRIVATE.

A first "systemctl restart dnf-makecache", cancelled by Ctrl+C after a few seconds, and then followed by a second "systemctl restart dnf-makecache", temporarily fixes the problem until the corresponding systemd timer triggers the time.

Comment 3 Pascal Ernster 2017-07-18 16:05:06 UTC
Just to be complete: the affected oackage version on my Fedora 25 machines is dnf 0:1.1.10-6.fc25. Though I have installed these machines quite recently so I don't know if previous versions of the dnf package are affected as well.

Comment 4 Igor Gnatenko 2017-07-19 11:17:34 UTC

*** This bug has been marked as a duplicate of bug 1470352 ***


Note You need to log in before you can comment on or make changes to this bug.