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namaheshwari
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Re: How to find the name of supergroup in hadoop a...

by Guru in Support Questions
‎03-23-2017 05:58 PM
1 Kudo
‎03-23-2017 05:58 PM
1 Kudo
You just need to logon to the namenode hosts and run the same grep command on the /etc/group file ... View more

Re: How to find the name of supergroup in hadoop a...

by Guru in Support Questions
‎03-23-2017 05:27 PM
1 Kudo
‎03-23-2017 05:27 PM
1 Kudo
I think what he means is to check the same on the namenode hosts. ... View more

Re: How to find the name of supergroup in hadoop a...

by Guru in Support Questions
‎03-23-2017 05:15 PM
1 Kudo
‎03-23-2017 05:15 PM
1 Kudo
Hi Jeeva, Find the superusergroup value in hdfs-site.xml. Lets say for instance this value is 'hadoop' Once you find that value, you need to do is "grep 'superusergroup:' /etc/group" i.e if that value is hadoop, it will be: grep 'hadoop:' /etc/group This should return you the list of all users belonging to the supergroup. ... View more

Re: Install hue on HDP 2.5.3 on DEBIAN 7

by Guru in Support Questions
‎03-23-2017 04:30 PM
7 Kudos
‎03-23-2017 04:30 PM
7 Kudos
Below is one similar post which might help: https://community.hortonworks.com/questions/43502/hue-installation-hdp-24-and-rhel7.html ... View more

Re: How to find the name of supergroup in hadoop a...

by Guru in Support Questions
‎03-23-2017 04:18 PM
7 Kudos
‎03-23-2017 04:18 PM
7 Kudos
@Jeeva Jeeva - There is a property "dfs.permissions.superusergroup" in hdfs-site.xml which specifies the superusergroup. Please see below apache guide for HDFS Permissions: https://hadoop.apache.org/docs/r2.4.1/hadoop-project-dist/hadoop-hdfs/HdfsPermissionsGuide.html To list all the users belonging to the supergroup, its just like getting users belonging to a group in linux. Below is good article on that: https://www.cyberciti.biz/faq/linux-list-all-members-of-a-group/ ... View more

Re: Secured WebHDFS HA with HAProxy

by Guru in Support Questions
‎03-23-2017 01:13 AM
1 Kudo
‎03-23-2017 01:13 AM
1 Kudo
So, this works fine as expected when we provide the Active Namenode in the curl call instead of the Proxy server. Yeah, I don't think we can work around this by using a proxy. There is an Apache Jira already open for the issue: https://issues.apache.org/jira/browse/HDFS-6371 For now I think you can either use the way we did above, or have Knox / Httpfs ... View more

Re: Secured WebHDFS HA with HAProxy

by Guru in Support Questions
‎03-23-2017 12:45 AM
1 Kudo
‎03-23-2017 12:45 AM
1 Kudo
Can you please paste the output of running below commands : kinit -kt /etc/security/keytabs/spnego.service.keytab HTTP/node2.localdomain@HO-UBU02 klist curl -i --negotiate -u : 'http://node2.localdomain:50070/webhdfs/v1/tmp/?op=LISTSTATUS' ... View more

Re: Secured WebHDFS HA with HAProxy

by Guru in Support Questions
‎03-23-2017 12:25 AM
1 Kudo
‎03-23-2017 12:25 AM
1 Kudo
Can you please share your hdfs-site.xml file. ... View more

Re: Problem login for first time in Nifi

by Guru in Support Questions
‎03-22-2017 11:48 PM
1 Kudo
‎03-22-2017 11:48 PM
1 Kudo
Below posts also have similar login error: https://community.hortonworks.com/questions/83331/error-unable-to-perform-the-desired-action-due-to.html https://community.hortonworks.com/questions/54164/how-to-enable-user-authentication-with-kerberos-in.html https://community.hortonworks.com/questions/63770/nifi-authorization-problem.html Please see if this helps! ... View more

Re: Secured WebHDFS HA with HAProxy

by Guru in Support Questions
‎03-22-2017 11:36 PM
‎03-22-2017 11:36 PM
@Hajime - Please see below Apache Documentation for WebHdfs Authentication: https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-hdfs/WebHDFS.html#Authentication As stated in point 2 for Kerberos enabled cluster you can do kinit with Spengo Principal and perform the webhdfs operation. Can you please paste the command you are trying and the stack trace to debug further? ... View more
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