private void readVersionTagOnlyEntry(CountingDataInputStream dis)
      throws IOException {
    long drId = DiskInitFile.readDiskRegionID(dis);
    DiskRecoveryStore drs = getOplogSet().getCurrentlyRecovering(drId);
    // read versions
    VersionTag tag = readVersionsFromOplog(dis);
    if (logger.isTraceEnabled(LogMarker.PERSIST_RECOVERY_VERBOSE)) {
      logger.trace(LogMarker.PERSIST_RECOVERY_VERBOSE, "readVersionTagOnlyEntry drId={} tag={}",
          drId, tag);
    }
    readEndOfRecord(dis);

    // Update the RVV with the new entry
    if (drs != null) {
      drs.recordRecoveredVersionTag(tag);
    }
  }
Reads an oplog entry of type Modify

@param dis DataInputStream from which the oplog is being read
@param opcode byte whether the id is short/int/long
geode-core/src/main/java/org/apache/geode/internal/cache/Oplog.java