public boolean hasErrored() {
    for (TapOperation op : ops) {
      if (!op.hasErrored()) {
        return false;
      }
    }
    return true;
  }
Determine if messages sent to this server and recorded on this TapStream
have been determined to be in error.

@return true if all operations on this TapStream are in an error state
src/main/java/net/spy/memcached/tapmessage/TapStream.java