I use the serializer example in this blog post: http://blog.cloudera.com/blog/2012/11/streaming-data-into-apache-hbase-using-apache-flume/
but got "Unable to deliver event. Exception follows. java.lang.NullPointerException". From looking it up in forums, I think it may be caused by empty header. If so, how is a timestamp header is added? if not what cause the event undelivery to happen? Thank you, George
