[Resolved] Updated transmission now it does not launch

[warning]

Hello,

I am running CentOS7.

Initially transmission was one of the first applications I installed via the application installer GUI. It ran without issue.

Since then i've followed some guides to install virtualbox, tigervncserver, and plexmediaserver. Everything has been running smoothly for about a month but tonight I decided to yum update and reboot. After a reboot transmission will not launch.

I removed it via yum and reinstalled. I've also reinstalled it via the application manager gui but each time it won't launch.

I'm new to linux but in /var/log/messages I see this error when I try to launch the application...

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Feb 16 21:56:04 STREAMBOX transmission-gtk.desktop: transmission-gtk: error while loading shared libraries: libnatpmp.so.1: cannot open shared object file: No such file or directory

When I do a

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find / | grep libnatpmp.so.1

I see the file lives in /usr/lib/plexmediaserver/libnatpmp.so.1

I've done some searching and it seems like a lot of similar error threads i've found are resolved by first locating the location of the shared library file and then creating a symlink. I'm not entirely following what is happening and I don't totally understand shared libraries and if it applies to my situation. Any help or tips on where to go from here would be appreciated.

[TrevorH]

Or perhaps

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[root@centos7 ~]# yum provides '*/libnatpmp.so.1'
Loaded plugins: changelog, langpacks, priorities, product-id, search-disabled-repos, subscription-manager, versionlock
This system is not registered with Subscription Management. You can use subscription-manager to register.
464 packages excluded due to repository priority protections
libnatpmp-20150609-1.el7.x86_64 : Library of The NAT Port Mapping Protocol (NAT-PMP)
Repo        : epel
Matched from:
Filename    : /usr/lib64/libnatpmp.so.1

[stevemowbray]

The newer EPEL package is faulty in that it should require libnatpmp but doesn't. The solution as Trevor indicates is just to

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yum install libnatpmp

from EPEL.

[mghe]

yum install libnatpmp

[avij]

If "yum install libnatpmp" helps, it would be really neat if you could file a bug about this on bugzilla.redhat.com > New > Fedora > Fedora EPEL so that this would get fixed.

[warning]

Thanks for the help guys. I ended up trying yum install libnatpmp on my own while I waited for the post to be approved. It did resolve the issue.

Thanks for providing support via the forum, its much appreciated. I would like to file a bug as suggested but I want to make sure I totally understand the issue first.

Was the issue that the transmission package has a bug in it which does not properly have all the prerequisites defined, so the library ends up missing after a install?

[avij]

If the problem disappeared after you ran "yum install libnatpmp", yes, it's a problem with how transmission is packaged. If transmission requires libnatpmp, the package should specify libnatpmp as a requirement. Apparently it isn't specifed as a requirement at the moment.