hadoop-R | Example code for running R on Hadoop

by jseidman R Version: Current License: No License

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kandi X-RAY | hadoop-R Summary

hadoop-R is a R library typically used in Big Data, Kafka, Spark, Hadoop applications. hadoop-R has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Examples of integrating Hadoop and R. This directory contains the following:.

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Security

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Support

hadoop-R has a low active ecosystem.

It has 135 star(s) with 66 fork(s). There are 33 watchers for this library.

It had no major release in the last 6 months.

hadoop-R has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of hadoop-R is current.

Quality

hadoop-R has 0 bugs and 0 code smells.

Security

hadoop-R has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

hadoop-R code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

hadoop-R does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

hadoop-R releases are not available. You will need to build from source code and install.

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hadoop-R Key Features

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hadoop-R Examples and Code Snippets

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Community Discussions

Trending Discussions on hadoop-R

Copy a file from local machine to docker container

ssh connection to host port 22 connection refused

Apache Oozie throws ClassNotFoundException (org.apache.hadoop.conf.Configuration) during startup

log4j ERROR found in kafka connecting to zookeeper

Unhealthy EMR nodes "local-dirs are bad: /mnt/yarn,/mnt3/yarn"

QUESTION

Copy a file from local machine to docker container

Asked 2021-Jul-15 at 11:41

I am following this example:

I find the namenode as follows:

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ANSWER

Answered 2021-Jul-15 at 11:38

Remove the $ at the beginning. That's what $: command not found means. Easy to miss when copy pasting code

Source https://stackoverflow.com/questions/68393052

QUESTION

ssh connection to host port 22 connection refused

Asked 2021-Jun-20 at 06:50

I use a VMware virtualization system. I have centos release 7 as my operating system. I installed hadoop2.7.1. After installing Hadoop I ran the command :#hdfs namenode -format, it ran successfully. But when I run the command :#./start-all.sh it gives me errors. I tried several proposals that I saw on the internet but the problem persists

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ANSWER

Answered 2021-Jun-20 at 06:50

Provide ssh-key less access to all your worker nodes in hosts file, even localhost. Read instruction in the Tutorial of How To Set Up SSH Keys on CentOS 7.

At last test access without password by ssh localhost and ssh [yourworkernode].

Also, run start-dfs.sh and if was successful run start-yarn.sh.

Source https://stackoverflow.com/questions/68031454

QUESTION

Apache Oozie throws ClassNotFoundException (org.apache.hadoop.conf.Configuration) during startup

Asked 2021-May-09 at 23:25

I built the Apache Oozie 5.2.1 from the source code in my MacOS and currently having trouble running it. The ClassNotFoundException indicates a missing class org.apache.hadoop.conf.Configuration but it is available in both libext/ and the Hadoop file system.

I followed the 1st approach given here to copy Hadoop libraries to Oozie binary distro. https://oozie.apache.org/docs/5.2.1/DG_QuickStart.html

I downloaded Hadoop 2.6.0 distro and copied all the jars to libext before running Oozie in addition to other configs, etc as specified in the following blog.

https://www.trytechstuff.com/how-to-setup-apache-hadoop-2-6-0-version-single-node-on-ubuntu-mac/

This is how I installed Hadoop in MacOS. Hadoop 2.6.0 is working fine. http://zhongyaonan.com/hadoop-tutorial/setting-up-hadoop-2-6-on-mac-osx-yosemite.html

This looks pretty basic issue but could not find why the jar/class in libext is not loaded.

OS: MacOS 10.14.6 (Mojave)
JAVA: 1.8.0_191
Hadoop: 2.6.0 (running in the Mac)

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ANSWER

Answered 2021-May-09 at 23:25

I was able to sort the above issue and few other ClassNotFoundException by copying the following jar files from extlib to lib. Both folder are in oozie_install/oozie-5.2.1.

libext/hadoop-common-2.6.0.jar
libext/commons-configuration-1.6.jar
libext/hadoop-mapreduce-client-core-2.6.0.jar
libext/hadoop-hdfs-2.6.0.jar

While I am not sure how many more jars need to be moved from libext to lib while I try to run an example workflow/job in oozie. This fix brought up Oozie web site at http://localhost:11000/oozie/

I am also not sure why Oozie doesn't load the libraries in the libext/ folder.

Source https://stackoverflow.com/questions/67462448

QUESTION

log4j ERROR found in kafka connecting to zookeeper

Asked 2021-Jan-11 at 10:22

I am trying to connect kafka to zookeeper on three machines, one is my laptop and other two are virtual machines. When I attempted initiating kafka using

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ANSWER

Answered 2021-Jan-11 at 10:22

These exceptions are not related to ZooKeeper. They are thrown by log4j as it's not allowed to write to the specified files. These should not prevent Kafka from running but obviously you won't get log4j logs.

When starting Kafka with bin/kafka-server-start.sh, the default log4j configuration file, log4j.properties, is used. This attempts to write logs to ../logs/, see https://github.com/apache/kafka/blob/trunk/bin/kafka-run-class.sh#L194-L197

In your case, this path is /usr/local/kafka/bin/../logs and Kafka is not allowed to write there.

You can change the default path by setting the LOG_DIR environment variable to a path where Kafka will be allowed to write logs, for example:

Source https://stackoverflow.com/questions/65661609

QUESTION

Unhealthy EMR nodes "local-dirs are bad: /mnt/yarn,/mnt3/yarn"

Asked 2020-Jul-07 at 18:30

I have a spark EMR cluster with 1 master and 8 Spot nodes. Today all the nodes dead while running a job, and spark-shell is also not assessable afterwards.

Click the 'Unhealthy Nodes' in hadoop console showing errors 2/4 local-dirs are bad: /mnt/yarn,/mnt3/yarn; 1/1 log-dirs are bad: /var/log/hadoop-yarn/containers

It seems related to the disk space issue in Why does Hadoop report "Unhealthy Node local-dirs and log-dirs are bad"? so I modified yarn-site.xml as described

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ANSWER

Answered 2020-Jul-07 at 18:30

Do you have termination protection on? If it's on the nodes cannot be automatically killed and restarted - see https://docs.aws.amazon.com/emr/latest/ManagementGuide/UsingEMR_TerminationProtection.html

Source https://stackoverflow.com/questions/62159183

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install hadoop-R

You can download it from GitHub.

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