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Description of problem: Sometimes strange message graduated from dnf. Version-Release number of selected component (if applicable): Last metadata expiration check: 0:37:51 ago on Thu Oct 13 16:57:42 2016. Installed Packages Name : dnf Arch : noarch Epoch : 0 Version : 1.1.10 Release : 2.fc25 Size : 879 k Repo : @System From repo : anaconda Summary : Package manager forked from Yum, using libsolv as a dependency resolver URL : https://github.com/rpm-software-management/dnf License : GPLv2+ and GPLv2 and GPL Description : Package manager forked from Yum, using libsolv as a dependency resolver. sudo dnf install python-gtkextra BDB2053 Freeing read locks for locker 0x4ee: 7728/140565559917888 BDB2053 Freeing read locks for locker 0x4f0: 7728/140565559917888 Last metadata expiration check: 0:30:56 ago on Thu Oct 13 16:57:42 2016. Dependencies resolved. ====================================================================================================================================================== Package Arch Version Repository Size ====================================================================================================================================================== Installing: gtk+extra x86_64 2.1.2-18.fc24 fedora 312 k python-gtkextra x86_64 1.1.0-27.fc25 fedora 103 k Transaction Summary ====================================================================================================================================================== Install 2 Packages Total download size: 414 k Installed size: 1.3 M Is this ok [y/N]: cat /etc/os-release NAME=Fedora VERSION="25 (Workstation Edition)" ID=fedora VERSION_ID=25 PRETTY_NAME="Fedora 25 (Workstation Edition)" ANSI_COLOR="0;34" CPE_NAME="cpe:/o:fedoraproject:fedora:25" HOME_URL="https://fedoraproject.org/" BUG_REPORT_URL="https://bugzilla.redhat.com/" REDHAT_BUGZILLA_PRODUCT="Fedora" REDHAT_BUGZILLA_PRODUCT_VERSION=25 REDHAT_SUPPORT_PRODUCT="Fedora" REDHAT_SUPPORT_PRODUCT_VERSION=25 PRIVACY_POLICY_URL=https://fedoraproject.org/wiki/Legal:PrivacyPolicy VARIANT="Workstation Edition" VARIANT_ID=workstation uname -a Linux fedora25beta 4.8.1-1.fc25.x86_64 #1 SMP Fri Oct 7 14:38:22 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
It's just something didn't close RPMDB properly, not DNF itself.
Yes its not a bug but a sign that something unexpected happended earlier. See http://rpm.org/wiki/Docs/RpmFAQ#MyrpmdbiscorruptedImgettingerrorsaboutThreadprocessdiedinBerkeleyDBlibrarytellingmetorundatabaserecovery for the long answer.