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https://issues.apache.org/jira/browse/ARROW-4785?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou resolved ARROW-4785.
-----------------------------------
Resolution: Not A Problem
> [CI] Make Travis CI resilient against hash sum mismatch errors
> --------------------------------------------------------------
>
> Key: ARROW-4785
> URL: https://issues.apache.org/jira/browse/ARROW-4785
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Continuous Integration
> Reporter: Hatem Helal
> Priority: Minor
> Labels: ci-failure
>
> Travis Jobs sometime fail with a GPG error:
> {code:java}
> W: http://ppa.launchpad.net/couchdb/stable/ubuntu/dists/trusty/Release.gpg:
> Signature by key 15866BAFD9BCC4F3C1E0DFC7D69548E1C17EAB57 uses weak digest
> algorithm (SHA1)
> W: An error occurred during the signature verification. The repository is not
> updated and the previous index files will be used. GPG error:
> https://packagecloud.io/github/git-lfs/ubuntu trusty InRelease: The following
> signatures couldn't be verified because the public key is not available:
> NO_PUBKEY 6B05F25D762E3157
> W: Failed to fetch
> https://packagecloud.io/github/git-lfs/ubuntu/dists/trusty/InRelease The
> following signatures couldn't be verified because the public key is not
> available: NO_PUBKEY 6B05F25D762E3157
> E: Failed to fetch
> http://security.ubuntu.com/ubuntu/dists/trusty-security/main/binary-i386/Packages.gz
> Hash Sum mismatch
> W: Some index files failed to download. They have been ignored, or old ones
> used instead.
> The command "if [ $TRAVIS_OS_NAME == "linux" ]; then
> sudo bash -c "echo -e 'Acquire::Retries 10; Acquire::http::Timeout
> \"20\";' > /etc/apt/apt.conf.d/99-travis-retry"
> sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
> sudo apt-get update -qq
> fi
> " failed and exited with 100 during .
> Your build has been stopped.{code}
> It would be nice if the number of retries, timeout, or both could be
> increased to make the travis jobs more resilient to this seemingly sporadic
> issue.
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