webhdfs | Ruby client for Hadoop WebHDFS

by kzk Ruby Version: Current License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | webhdfs Summary

webhdfs is a Ruby library typically used in Big Data, Kafka, Spark, Hadoop applications. webhdfs has no bugs, it has no vulnerabilities and it has low support. However webhdfs has a Non-SPDX License. You can download it from GitHub.

The webhdfs gem is to access Hadoop WebHDFS (EXPERIMENTAL: and HttpFs). WebHDFS::Client is a client class, and WebHDFS::FileUtils is utility like 'fileutils'.

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Quality

Security

License

Reuse

Support

webhdfs has a low active ecosystem.

It has 79 star(s) with 42 fork(s). There are 8 watchers for this library.

It had no major release in the last 6 months.

There are 5 open issues and 9 have been closed. On average issues are closed in 40 days. There are 3 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of webhdfs is current.

Quality

webhdfs has 0 bugs and 0 code smells.

Security

webhdfs has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

webhdfs code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

webhdfs has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

webhdfs releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi has reviewed webhdfs and discovered the below as its top functions. This is intended to give you an instant insight into webhdfs implemented functionality, and help decide if they suit your requirements.

Perform HTTP request
Execute a request
build the request
Copy a file from remote remote
Copy a file to remote
Gets the default value associated with the backend .
Sets up a HTTP client
Create a new request
Write a request to a path
Sets a list of times modification times .

Get all kandi verified functions for this library.

webhdfs Key Features

No Key Features are available at this moment for webhdfs.

webhdfs Examples and Code Snippets

No Code Snippets are available at this moment for webhdfs.

Community Discussions

Trending Discussions on webhdfs

In webhdfs, what is the difference between length and spaceConsumed?

Hadoop: How can i resolve the error "Could'n upload the file" in docker container

pull xcom value inside custom operator airflow

High availability HDFS client python

logstash with hdfs for paritcular duration

Curl throws error (3) with variable but not with manually written URL

Why it says "(No such file or directory)" when using the file stored in HDFS?

How create a (key, value) in JsonArray

How return the list of file form HDFS using the HDFS API

hadoop installation, to start secondary namenode, nodemanagers, and resource managers

QUESTION

In webhdfs, what is the difference between length and spaceConsumed?

Asked 2022-Jan-25 at 14:24

Using webhdfs we can get the content summary of a directory/file.

However, the following properties are unclear for me:

...

ANSWER

Answered 2022-Jan-25 at 14:24

According to a collegue, the answer is:

Source https://stackoverflow.com/questions/70849889

QUESTION

Hadoop: How can i resolve the error "Could'n upload the file" in docker container

Asked 2021-Oct-01 at 07:23

Hadoop was run on the local machine with docker-compose.yml. And tried to upload a file to HDFS from the Web UI, but the following results occurred:

Couldn't upload the file bar.txt

Symptoms

folders can be created on the Web UI.
browser devtools fails to network request

Attempt 1

checked and found that the network call failed. Wokred with this reference Open a file with webhdfs in docker container and added the following to services.datanode.ports into docker-compose.yml. But the symptoms were the same.

...

ANSWER

Answered 2021-Aug-30 at 18:26

File uploads to WebHDFS require an HTTP redirect (first it creates the file handle in HDFS, then you upload the file to that place).

Your host doesn't know the container service names, so you will see ERR_NAME_NOT_RESOLVED

One possible solution is to edit your /etc/hosts file to include the namenode container ID to point at 127.0.0.1, however the better way would simply be do docker-compose exec into a container with an HDFS client, and run hadoop fs -put commands

Source https://stackoverflow.com/questions/68947700

QUESTION

pull xcom value inside custom operator airflow

Asked 2021-Jun-23 at 23:42

I wrote a custom operator called HadoopPutHdfs in Airflow, so I need to pass xxx parameter to HadoopPutHdfs and I need to fill xxx with the return value from the generate_file_path task

...

ANSWER

Answered 2021-Jun-23 at 23:42

Sounds like you are missing the definition of xxx as a template_field in your custom operator. For example:

Source https://stackoverflow.com/questions/68107480

QUESTION

High availability HDFS client python

Asked 2021-May-19 at 13:15

In HDFSCLI docs it says that it can be configured to connect to multiple hosts by adding urls separated with semicolon ; (https://hdfscli.readthedocs.io/en/latest/quickstart.html#configuration). I use kerberos client, and this is my code - from hdfs.ext.kerberos import KerberosClient hdfs_client = KerberosClient('http://host01:50070;http://host02:50070')

And when I try to makedir for example, I get the following error - requests.exceptions.InvalidURL: Failed to parse: http://host01:50070;http://host02:50070/webhdfs/v1/path/to/create

...

ANSWER

Answered 2021-May-19 at 13:15

Apparently the version of hdfs I installed was old, the code didn't work with version 2.0.8, and it did work with version 2.5.7

Source https://stackoverflow.com/questions/66783953

QUESTION

logstash with hdfs for paritcular duration

Asked 2021-Apr-24 at 05:30

Hi I am new logstash and i have done with read the data from tcp and write to the hdfs...that part is don but i want to write to data to 4 different folder of hdfs

Here is sample code

...

ANSWER

Answered 2021-Apr-24 at 05:30

It is possible, you will need to use some mutate filters and some conditionals.

First you need to get the value of the minute from the @timestamp of the event and add the value into a new field, you can use the [@metadata] object, which can be use to filtering, but it will not be present in the output event.

Source https://stackoverflow.com/questions/67227430

QUESTION

Curl throws error (3) with variable but not with manually written URL

Asked 2021-Apr-22 at 14:52

I am communicating with HDFS using curl. Procedure to interact with HDFS via webhdfs is two steps and I receive a url from a first curl command:

...

ANSWER

Answered 2021-Apr-22 at 14:52

You get a \r (carriage return) back in $destination. You can remove it with tr -d '\r'

Source https://stackoverflow.com/questions/67214881

QUESTION

Why it says "(No such file or directory)" when using the file stored in HDFS?

Asked 2021-Apr-05 at 13:37

So I have this file on HDFS but apparently HDFS can't find it and I don't know why.

The piece of code I have is:

...

ANSWER

Answered 2021-Apr-05 at 13:37

The getSchema() method that works is:

Source https://stackoverflow.com/questions/66943071

QUESTION

How create a (key, value) in JsonArray

Asked 2021-Mar-03 at 10:23

I have a JSONObject, like the output in this link:

https://hadoop.apache.org/docs/r1.0.4/webhdfs.html#GETFILESTATUS

I woul dlike to get the pathSuffix (file names) and the modificationTime (Dates) values in a JSON Array, like this:

...

ANSWER

Answered 2021-Mar-02 at 22:40

json does not support a time type, that is the reason for the error. What you need to do is to change that into a type json can use. That might be a string that represents the time (choose the formating yourself, so you are sure, that when reading it out again you have consistent data) or easier you just keep the long value used.

Here you cansee what json can use: https://www.json.org/json-en.html

Source https://stackoverflow.com/questions/66447226

QUESTION

How return the list of file form HDFS using the HDFS API

Asked 2021-Feb-24 at 15:36

I created a java function to open a file in HDFS. The function is used only the API HDFS. I do not use any Hadoop dependencies in my code. My function worked well:

...

ANSWER

Answered 2021-Feb-24 at 15:36

You can use the exact same logic as the first solution, but this time, use a StringBuilder to get the full response which you then need to parse using a JSON library.

Source https://stackoverflow.com/questions/66339840

QUESTION

hadoop installation, to start secondary namenode, nodemanagers, and resource managers

Asked 2021-Feb-22 at 08:50

I have installed hadoop 3.1.0 clusters on 4 linux machines, hadoop1(master),hadoop2,hadoop3,and hadoop4.

I ran start-dfs.sh and start-yarn.sh, and saw only namenodes and datanodes running with jps. secondary namenodes, nodemanagers and resourcemanagers failed. I tried a few solutions and this is where I got. How to configure and start secondary namenodes, nodemanagers and resroucemanagers?

About secondary namenodes logs says

...

ANSWER

Answered 2021-Feb-22 at 08:50

I had jdk15.0.2 installed and it had some sort of problem with hadoop 3.1.0. Later I installed jdk8 and changed java_home. It went all fine!

About secondary node manager, I had hadoop1:9000 for both fs.defaultFS and dfs.namenode.secondary.http-address, and therefore created a conflict. I changed secondary into 9001 and it went all fine!

Source https://stackoverflow.com/questions/66289226

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

Vulnerabilities

No vulnerabilities reported

Install webhdfs

You can download it from GitHub.
On a UNIX-like operating system, using your system’s package manager is easiest. However, the packaged Ruby version may not be the newest one. There is also an installer for Windows. Managers help you to switch between multiple Ruby versions on your system. Installers can be used to install a specific or multiple Ruby versions. Please refer ruby-lang.org for more information.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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