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https://issues.apache.org/jira/browse/MESOS-4068?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15042078#comment-15042078
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Jie Yu commented on MESOS-4068:
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Looked at the test case. It's possible that coord1 was elected first and then
demoted by coord3 who got elected later. In that case, num_elected will be 2.
> Multiple log coordinators can be elected concurrently
> -----------------------------------------------------
>
> Key: MESOS-4068
> URL: https://issues.apache.org/jira/browse/MESOS-4068
> Project: Mesos
> Issue Type: Bug
> Components: replicated log
> Reporter: Neil Conway
> Assignee: Neil Conway
> Labels: mesosphere
> Attachments: rep_log_multiple_coord_test_case-1.patch
>
>
> Attached is a test case (reduced from a test case submitted by Michael Maged
> at IBM).
> Running {{mesos-tests --gtest_filter="CoordinatorTest.SimulationDriver"
> --gtest_repeat=1000}} consistently fails in < 100 iterations on a CentOS 7
> VM. However, it only failed ~once in 12,000 iterations on the Mac OS X 10.10
> host.
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