@Override
  public String getMessage() {
    InternalDistributedMember s = getSender();
    String m = super.getMessage();
    return (s != null) ? ("From " + s + ": " + m) : m;
  }
Gets the member which threw the exception

@return the throwing member
@since GemFire 6.0
geode-core/src/main/java/org/apache/geode/distributed/internal/ReplyException.java