Hadoop is an Apache open-source project that provides software for reliable and scalable distributed computing.
I was using Hadoop in a pseudo-distributed mode and everything was working fine. But then I had to restart my …
hadoop hdfsI want to check the spark version in cdh 5.7.0. I have searched on the internet but not able to understand. …
apache-spark hadoop clouderaI am new to hadoop distributed file system, I have done complete installation of hadoop single node on my machine.…
shell security hadoop permissions hdfsI know that you can get column names from a table via the following trick in hive: hive> set …
sql hadoop hiveRight now I implement row count over ResultScanner like this for (Result rs = scanner.next(); rs != null; rs = scanner.next()) { …
hadoop hbase bigdataI am trying to run a simple NaiveBayesClassifer using hadoop, getting this error Exception in thread "main" java.io.IOException: …
java hadoop ioI did something like this to count the number of rows in an alias in PIG: logs = LOAD 'log' logs_…
hadoop apache-pigI'm a novice. I have a employee table with a column specifying the joining date and I want to retrieve …
hadoop hive hiveqlI'm a noobie here. I'm trying to retrieve top 2 tables from my employee list based on salary in hive (version 0.11). …
hadoop hive hiveqlWhen load data from HDFS to Hive, using LOAD DATA INPATH 'hdfs_file' INTO TABLE tablename; command, it looks like …
hadoop hive