Top "Hadoop" questions

Hadoop "Unable to load native-hadoop library for your platform" warning

I'm currently configuring hadoop on a server running CentOs. When I run start-dfs.sh or stop-dfs.sh, I get the …

java linux hadoop hadoop2 java.library.path

Spark - load CSV file as DataFrame?

I would like to read a CSV in spark and convert it as DataFrame and store it in HDFS with …

scala apache-spark hadoop apache-spark-sql hdfs

connect to host localhost port 22: Connection refused

While installing hadoop in my local machine , i got following error ssh -vvv localhost OpenSSH_5.5p1, OpenSSL 1.0.0e-fips 6 Sep 2011 debug1: …

linux hadoop ssh

How to delete and update a record in Hive

I have installed Hadoop, Hive, Hive JDBC. which are running fine for me. But I still have a problem. How …

hadoop hive sql-delete

How to copy file from HDFS to the local file system

How to copy file from HDFS to the local file system . There is no physical location of a file under …

hadoop copy hdfs

How to know Hive and Hadoop versions from command prompt?

How can I find which Hive version I am using from the command prompt. Below is the details- I am …

hadoop hive

Hive insert query like SQL

I am new to hive, and want to know if there is anyway to insert data into hive table like …

sql hadoop hive hiveql

How to Delete a directory from Hadoop cluster which is having comma(,) in its name?

I have uploaded a Directory to hadoop cluster that is having "," in its name like "MyDir, Name" when I am …

file hadoop comma

hadoop copy a local file system folder to HDFS

I need to copy a folder from local file system to HDFS. I could not find any example of moving …

hadoop hdfs

Difference between Pig and Hive? Why have both?

My background - 4 weeks old in the Hadoop world. Dabbled a bit in Hive, Pig and Hadoop using Cloudera's Hadoop …

hadoop hive apache-pig