question Re: How to copy files from remote system to HDFS using HTTPFS in Support Questions

How to copy files from remote windows system to HDFS

Raghava9 — Fri, 16 Sep 2022 10:26:41 GMT

Currently i am using spooldir(source) for copying the files from local file system to HDFS, but i want to copy files from remote windows system.

So can some one suggest which source option can i use to copy the files from remote windows system to HDFS using flume where i can specify the username and password.

Re: How to copy files from remote windows system to HDFS

MVERVUURT — Wed, 06 Jul 2016 15:19:08 GMT

It may be a bit of a long shot, but you could mount the directories of your remote server in your local server using samba and afterwards copy the files to hdfs from the command line.

Re: How to copy files from remote windows system to HDFS

mathieu.d — Tue, 09 Aug 2016 08:00:17 GMT

In the role HDFS there is a "NFS gateway service" that let you mount an NFS image of the HDFS.

That is one way (you can directly copy file to it). (Check the performance).

Hue (web ui) also let you upload files into HDFS (this is a more manual approach).

In our enterprise, for an automated process, we are using a custom Java application that is using the HCatWriter API for writting into Hive tables.

But you can also use the httpFs or the webHdfs.

Re: How to copy files from remote windows system to HDFS using HTTPFS

Reavidence — Tue, 28 May 2019 10:22:42 GMT

http://httpfs.server.com:14000/webhdfs/v1/user/rakesh/abc.csv?op=CREATE&user.name=hdfs

I am able to create only small files.

How to increase the buffer size for uploading GB's of file??

Re: How to copy files from remote windows system to HDFS using HTTPFS

csguna — Tue, 28 May 2019 14:45:45 GMT

Didnt quite understand your requirement
Could you provide some more information

Re: How to copy files from remote system to HDFS using HTTPFS

Reavidence — Wed, 05 Jun 2019 10:07:56 GMT

HTTPFS:

**************working with private ip and public ip irrespective of file size********
curl -X PUT -L -b cookie.jar "http://192.168.1.3:14000/webhdfs/v1/user/abc.csv?op=CREATE&data=true&user.name=hdfs" --header "Content-Type:application/octet-stream" --header "Transfer-Encoding:chunked" -T "abc.csv"

Above command is for a non-kerberized cluster. I enabled Kerberos and what parameters should I pass to put a file to hdfs?

Re: How to copy files from remote system to HDFS using HTTPFS

Harsh J — Thu, 06 Jun 2019 01:24:05 GMT

@Reavidence,

HTTPFS with Kerberos requires SPNEGO authentication to be used. Per https://www.cloudera.com/documentation/enterprise/latest/topics/cdh_sg_httpfs_security.html, for curl (after kinit) this can be done by passing the below two parameters:

"""
The '--negotiate' option enables SPNEGO in curl.
The '-u :' option is required but the username is ignored (the principal that has been specified for kinit is used).
"""

Re: How to copy files from remote system to HDFS using HTTPFS

Reavidence — Fri, 07 Jun 2019 05:31:40 GMT

httpfs_kerberos_curl_error

I am getting 404 error when i tried to get filestatus using httpfs_ip:14000

But with webhdfs port 50070, i am getting the result. Below is successfull command but for httpfs port 14000 it's not working.

*****Working***

WEBHDFS(50070):

curl -i --negotiate -u : "http://gateway1.rev.com:50070/webhdfs/v1/user/root/ratemp/?op=LISTSTATUS"

*****Not working****

HTTPFS(14000):

curl --negotiate -u : -b ~/cookiejar.txt -c ~/cookiejar.txt http://gateway1.rev.com:14000/webhdfs/v1/user/root/ratemp/test.txt?op=LISTSTATUS

I am using coudera manager and is it requied to change

Re: How to copy files from remote system to HDFS using HTTPFS

Reavidence — Fri, 07 Jun 2019 07:00:25 GMT

I added above values and that was causing https to shutdown. After deleting those values , it started and working fine now.

Thanks @Harsh J for your reply.