The command "sudo -E apt-add-repository -y "ppa:ubuntu-toolchain-r/test"" failed and exited with 1 during

[junaruga]

As a reference, in my case, the cause of the issue was by Travis s390x’s IPv6.
I reported it here.

S390x IPv6 connect system call sometimes returning "Connection timed out" in apt-add-repository command

In Ruby project Travis s390x case, apt-add-repositorycommand sometimes , once in a 2 times or 3 times, has existed with error “Error: retrieving gpg key timed out”. https://travis-ci.org/ruby/ruby/jobs/623537864#L58 $ tool/travis_retry.sh sudo -E apt-add-repository -y "ppa:ubuntu-toolchain-r/test" + sudo -E apt-add-repository -y ppa:ubuntu-toolchain-r/test Error: retrieving gpg key timed out. gpg: keyring `/tmp/tmpya5afzam/secring.gpg' created gpg: keyring `/tmp/tmpya5afzam/pubring.gpg' creat…