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BugZero found this defect 2910 days ago.
The failure in https://jira.mongodb.org/browse/BF-4726 occurred when executing a readConcern=majority read on a document that was written with writeConcern=majority. Thus, it appears that the failure was likely caused by a mongod taking a long amount of time to read a document from local storage (not making any network requests to other nodes). The functions `doDirtyRead` and `doCommittedRead` should have the `maxTimeMS` values in their find commands increased to 10 minutes, so as to account for any potentially slow test machines.
xgen-internal-githook commented on Fri, 14 Jul 2017 20:51:14 +0000: Author: {u'username': u'judahschvimer', u'name': u'Judah Schvimer', u'email': u'judah@mongodb.com'} Message: SERVER-28046 increase maxTimeMS in read_committed_on_secondary.js (cherry picked from commit a0f582f5238b3382195cbc22d3803d6955760839) Branch: v3.4 https://github.com/mongodb/mongo/commit/c161a23f10dbe960d4b9c49b58bd22fe415bf1b9 xgen-internal-githook commented on Mon, 17 Apr 2017 17:56:20 +0000: Author: {u'username': u'judahschvimer', u'name': u'Judah Schvimer', u'email': u'judah@mongodb.com'} Message: SERVER-28046 increase maxTimeMS in read_committed_on_secondary.js Branch: master https://github.com/mongodb/mongo/commit/a0f582f5238b3382195cbc22d3803d6955760839