Rowanto Luo


Just another blog. or log.


Tag: error


  1. Adding New Currency in Java 8

    If you are using the java.lang.Currency as part of your entity, most likely you are already regretting it now. Most of the time, a currency is a three letter word, and we don't need the logic to be bundled in there. Keeping things simple and mapping these currencies…

    byr, byn, java currency, java multi currency, java, currency data format is incorrect, error, elasticbeanstalk, ec2, patch java

  2. Why Datanode is Denied Communication With Namenode

    So for those trying to setup HDFS out there, and are struggling with this kind of error where it said datanode denied communication with namenode: 2015-05-07 08:04:19,694 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Block pool BP-1184863888-172.17.0.3-1430984962919 (Datanode Uuid null) service to dockernamenode.…

    hadoop, hdfs, datanode, namenode, error