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The following code in Refresher::receivedIsMasterBeforeFoundMaster is unnecessary now that ReplicaSetMonitor has been rewritten with task executors. Its purpose was to scan a possible primary as soon as possible, but now all possible servers are scanned concurrently. Remove this code for simplicity's sake:
// If this node thinks the primary is someone we haven't tried, make that the next
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// hostToScan.
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if (!reply.primary.empty() && !_scan->triedHosts.count(reply.primary)) {
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std::deque<HostAndPort>::iterator it = std::stable_partition(
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_scan->hostsToScan.begin(), _scan->hostsToScan.end(), HostIs(reply.primary));
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if (it == _scan->hostsToScan.begin()) {
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// reply.primary wasn't in hostsToScan
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_scan->hostsToScan.push_front(reply.primary);
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}
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}
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