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Preventing node 0 from running for election for 5 seconds before doing a reconfig is not enough time to ensure node 1 is elected. We also do not do any waitForState on node 1 to make sure it is actually primary. To address this we should increase the timeout in the stepdown before node 0 is able to become primary and actually wait for node 1 to become primary before doing the reconfig. We can then use a replSetFreeze: 0 to reset the election timeout on node 0. Using ReplSetTest::stepUp could fix this. We also should make sure node 1 is actually elected primary before doing the reconfig. Asserting that node 0 is secondary is not enough.

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xgen-internal-githook commented on Thu, 20 Apr 2017 22:10:56 +0000: Author: {u'name': u'Ramon Fernandez', u'email': u'ramon@mongodb.com'} Message: SERVER-28480 / SERVER-27966 last_vote.js should await replication and call stepUp before reconfig This reverts commit 888390515874a9debd1b6c5d36559ca86b44babd. Branch: v3.4 https://github.com/mongodb/mongo/commit/b07e725a56e26e191d340714bfcd6d2bffc6b67c xgen-internal-githook commented on Thu, 20 Apr 2017 21:47:14 +0000: Author: {u'name': u'Ramon Fernandez', u'email': u'ramon@mongodb.com'} Message: Revert "SERVER-28480/27966 last_vote.js should await replication and call stepUp before reconfig" This reverts commit 7a6d8274f57cf141fd1d5c754ea1e2a1a6d2f372. Branch: v3.4 https://github.com/mongodb/mongo/commit/888390515874a9debd1b6c5d36559ca86b44babd xgen-internal-githook commented on Mon, 17 Apr 2017 16:25:52 +0000: Author: {u'username': u'will62794', u'name': u'William Schultz', u'email': u'william.schultz@mongodb.com'} Message: SERVER-28480/27966 last_vote.js should await replication and call stepUp before reconfig (cherry picked from commit 83ea6f6274b6f5f525569e72e278872886a3d70c) Branch: v3.2 https://github.com/mongodb/mongo/commit/751ecf3955279a81cb961fe09a6fd5e411f8e29b xgen-internal-githook commented on Mon, 17 Apr 2017 15:39:45 +0000: Author: {u'username': u'will62794', u'name': u'William Schultz', u'email': u'william.schultz@mongodb.com'} Message: SERVER-28480/27966 last_vote.js should await replication and call stepUp before reconfig (cherry picked from commit 83ea6f6274b6f5f525569e72e278872886a3d70c) Branch: v3.4 https://github.com/mongodb/mongo/commit/7a6d8274f57cf141fd1d5c754ea1e2a1a6d2f372 xgen-internal-githook commented on Wed, 5 Apr 2017 15:37:39 +0000: Author: {u'username': u'will62794', u'name': u'William Schultz', u'email': u'william.schultz@mongodb.com'} Message: SERVER-28480/27966 last_vote.js should await replication and call stepUp before reconfig Branch: master https://github.com/mongodb/mongo/commit/83ea6f6274b6f5f525569e72e278872886a3d70c

Steps to Reproduce