UIMA scale-out using Hadoop, number of map tasks

Hallo, I have deployed UIMA on Hadoop and currently I’m writing my thesis about this topic. One map task now receives exactly one file as data. There is one thing that is still confusing me: Hadoop Wiki (How many maps and reduces) says: “The number of map tasks can also be increased manually

Re: unable to run wordcount example on two node cluster

See: http://www.michael-noll.com/wiki/Running_Hadoop_On_Ubuntu_Linux_(Multi-Node_Cluster) java.io.IOException: Incompatible namespaceIDs us latha schrieb: Please let me know if i am missing something and please help me resolve the above issue. I shall provide any specific log info if