In test OplogFetcherAutoReconnectsButFails, the intention was to simulate a disconnect while the oplog fetcher is waiting for a response from the first find command and shut down the remote server before the oplog fetcher retries to connect. However, if _mockServer->shutdown() runs too fast, it could fail the initial connection as well, which is not what this test was intended for.

Instead, we should use simulateNetworkDisconnect to simulate a disconnect then use the hangBeforeOplogFetcherRetries failpoint to hang the retry and shut down the remote server before the oplog fetcher retries.