GitHub pull request #2717 of commit 62423b01960c02aa337906c634e23cce23095d4f, no merge conflicts.sha1origin/pr/2717/mergeghprbActualCommit62423b01960c02aa337906c634e23cce23095d4fghprbActualCommitAuthorYonghong SongghprbActualCommitAuthorEmailyhs@fb.comghprbAuthorRepoGitUrlhttps://github.com/iovisor/bcc.gitghprbTriggerAuthorghprbTriggerAuthorEmailghprbTriggerAuthorLoginghprbTriggerAuthorLoginMentionghprbPullId2717ghprbTargetBranchmasterghprbSourceBranchyhs_devGIT_BRANCHyhs_devghprbPullAuthorEmailghprbPullAuthorLoginyonghong-songghprbPullAuthorLoginMention@yonghong-songghprbPullDescriptionGitHub pull request #2717 of commit 62423b01960c02aa337906c634e23cce23095d4f, no merge conflicts.ghprbPullTitlefix a bug in networking/simulation.pyghprbPullLinkhttps://github.com/iovisor/bcc/pull/2717ghprbPullLongDescriptiontest test_brb.py failed on fc31 with the following error messages:\r\n```\r\n Traceback (most recent call last):\r\n File \"./test_brb.py\", line 162, in test_brb\r\n disable_ipv6=True)\r\n File \"/home/yhs/work/bcc/tests/python/simulation.py\", line 94, in _create_ns\r\n disable_ipv6)\r\n File \"/home/yhs/work/bcc/tests/python/simulation.py\", line 68, in _ns_add_ifc\r\n ns_ipdb.interfaces.lo.up().commit()\r\n File \"/usr/local/lib/python3.7/site-packages/pyroute2/ipdb/interfaces.py\", line 1078, in commit\r\n raise error\r\n File \"/usr/local/lib/python3.7/site-packages/pyroute2/ipdb/interfaces.py\", line 859, in commit\r\n transaction.wait_all_targets()\r\n File \"/usr/local/lib/python3.7/site-packages/pyroute2/ipdb/transactional.py\", line 507, in wait_all_targets\r\n raise CommitException('target %s is not set' % key)\r\n pyroute2.ipdb.exceptions.CommitException: target state is not set\r\n```\r\nThe reason is in networking/simulation.py, if the interface 'lo'\r\ninside the namespace is already up and it is tried to commit\r\nto 'up' state again, the pyroute2 library will cause an exception.\r\n\r\nThe fix is to avoid to 'up' interface 'lo' again if the interface\r\nis already in 'up' state.\r\n\r\nSigned-off-by: Yonghong Song <yhs@fb.com>ghprbCommentBodynullghprbGhRepositoryiovisor/bccghprbCredentialsId6d3daf13-69b8-48b1-9c8f-ec5353264113false<a title="fix a bug in networking/simulation.py" href="https://github.com/iovisor/bcc/pull/2717">PR #2717</a>: fix a bug in networking/sim...#25913800457460664bcc-pr #259259false2592087FAILURE1579679690079https://buildbot.iovisor.org/jenkins/user/yonghong-song/my-views/view/all/job/bcc-pr/259/git259https://buildbot.iovisor.org/jenkins/user/yonghong-song/my-views/view/all/job/bcc-pr/label=fc25/259/259https://buildbot.iovisor.org/jenkins/user/yonghong-song/my-views/view/all/job/bcc-pr/label=fc26/259/259https://buildbot.iovisor.org/jenkins/user/yonghong-song/my-views/view/all/job/bcc-pr/label=fc27/259/259https://buildbot.iovisor.org/jenkins/user/yonghong-song/my-views/view/all/job/bcc-pr/label=fc28/259/259https://buildbot.iovisor.org/jenkins/user/yonghong-song/my-views/view/all/job/bcc-pr/label=ubuntu1604/259/259https://buildbot.iovisor.org/jenkins/user/yonghong-song/my-views/view/all/job/bcc-pr/label=ubuntu1710/259/259https://buildbot.iovisor.org/jenkins/user/yonghong-song/my-views/view/all/job/bcc-pr/label=ubuntu1804/259/