When the primary accepts the attempt limit abort from _signalPrimaryForAbortIfOverAttemptLimit, the build fails, and the normal failure path (_signalPrimaryForAbortAndWaitForExternalAbort) sends voteAbortIndexBuild again. It's harmless, since the primary has already aborted, but it's a wasted round trip and a confusing log line. The failure path should skip the vote if the abort was already accepted.