private void replayWALFlushAbortMarker(FlushDescriptor flush) {
    // nothing to do for now. A flush abort will cause a RS abort which means that the region
    // will be opened somewhere else later. We will see the region open event soon, and replaying
    // that will drop the snapshot
  }
Drops the memstore contents after replaying a flush descriptor or region open event replay if
the memstore edits have seqNums smaller than the given seq id
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java