I have this script. When I execute it from putty, it works properly, but it fails when we execute it using java ProcessBuilder. It fails with “Hadoop command not found” error. Below is the Java code, which I am using to execute script. Answer Problem was the other script. Script one(1) starts Java…
Tag: hadoop
Setting up Hadoop in Pseudo-distributed mode in ubuntu
I’m trying to teach myself Hadoop on my laptop. My objective is to get the pseudo distributed mode running. I’m following the guide from the Apache website to set up Hadoop and HDFS in Ubuntu, but I can’t get it to work. Here are the steps I have followed so far: 1) check Java version: retur…
datanode[slave] running but connect namenode[master]
i can start hadoop sucess but datanode[slave] can’t connect namenode[master] detail /etc/hosts core-site.xml and hdfs-site.xml Answer 1) check if firewall is restricting port if so, flush it To open 9000, 2) check namenode logs for any issues under /var/log/hadoop
Linux and Hadoop : Mounting a disk and increasing the cluster capacity [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. This question does not appear to be about a specific programming problem, a software algorithm, or software tools primarily used by programmers. If you believe the question would be on-topic on another Stack …
Cannot write to Hadoop DFS directory mode 775 group permission UserGroupInformation
I’m running Hadoop 2.6.2 on a private cluster with file-system permissions enabled. The cluster has password files with only system users like hadoop, no personal accounts. I’m accessing DFS from a linux edge node that has personal accounts like mine (‘clott’). The problem is that I ca…
Starting hadoop – command not found
I have zero experience in hadoop and trying to set up hadoop in ec2 environment. After formatted the filesystem, I tried to start hadoop and it keeps saying command not found. I think I have tried every advice I found on stackoverflow previous questions/answers. Here is the line I am having trouble with: I ha…
Is that possible to run HADOOP and copy a file from local fs to HDFS in JAVA BUT without installing Hadoop on file system?
I have NOT installed hadoop on my Linux file System. I would like to run hadoop and copy the file from local file system to HDFS WITHOUT installing hadoop on my Linux file System. I have created a sample code but it says “wrong FS, expected file:///”. Any help for this? POM.XML I looked for all po…
Ubuntu: hadoop command not found
I am trying to check my installation of hadoop. I did create the environment variables and when I call printenv, I do see my HADOOP_HOME and PATH variables printed and correct (home/hadoop and HADOOP_HOME/bin respectively). If I go to home/hadoop in the terminal and call ls, I see the hadoop file there. If I …
How to let Apache Spark on Windows access Hadoop on Linux?
First, I have almost no experience on Apache Hadoop and Apache Spark. What I want for now is as follows: Hadoop is running on Hortonworks Sandbox 2.1, which is installed on a Windows 7 machine. Spark shell and Spark programs are running on the Windows 7 machine, which is the same machine as above. Spark shell…
HBase does not run after ./start-hbase.sh – Permission Denied?
I want to run HBase. I have installed hadoop completely and when I run start-all.sh , it works fine and gives me this output: But when I want to run start-hbase.sh , it gives me some errors of permission denied which I do not understand why: after that, I tried to run sudo ./start-hbase.sh , and I got somethi…