I just start my first steps in the Hadoop environment, I have download a sandbox virtual machine of MapR, and I gave it 16gb of memory with 4 core.
I manage to create a sample of data, and execute some queries using the Hue- Editor. (Simple select * from table)
Bug when i try to execute Aggregation base queries:
select count(*) from table
I am getting endless spinner and inside the server terminal, i am getting a list of errors:
blk_update_request I/O error dev fd0, sector 0.
Does anyone familiar with the problem?
Thanks for the help.