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PROBLEM: The dfs.namenode.accesstime.precision value cannot be set from Ambari 2.1.0 when using the HDP-2.2 stack. Symptoms include: Searching for this config using the 'Filter...' box from Ambari shows 'No properties to display.'Adding the property to 'Custom hdfs-site' (in the 'Add Property' popup) tells the user that 'This property is already defined'. Attempts at clicking on the 'Find property' link again says 'No properties to display.' The property is visible on all cluster nodes in /etc/hadoop/conf/hdfs-site.xml but it is set to 0. Trying to edit this property manually on each node only reverts the setting back to 0 whenever the HDFS is restarted. ROOT CAUSE: Known bug: https://issues.apache.org/jira/browse/AMBARI-13006 https://hortonworks.jira.com/browse/BUG-43478Ambari 2.1.0 added the ability to manage HDFS NFS Gateway settings, but, this only works for HDP stacks running at version 2.3.0 and higher. RESOLUTION: A fix will be included in Ambari 2.1.2. WORKAROUND: Ambari's co

What is the YARN's Capacity Scheduler?YARN's CapacityScheduler is designed to run Hadoop applications in a shared, multi-tenant cluster while maximizing the throughput and the utilization of the cluster.Traditionally each organization has it own private set of compute resources that have sufficient capacity to meet the organization's SLA. This generally leads to poor average utilization. Also there is heavy overhead of managing multiple independent clusters.Sharing clusters between organizations allows economies of scale . However, organizations are concerned about sharing a cluster in the fear of not getting enaough available resources that are critical to meet their SLAs.The CapacityScheduler is designed to allow sharing a large cluster while giving each organization capacity guarantees. There is an added benefit that an organization can access any excess capacity not being used by others. This provides elasticity for the organizations in a cost-effective manner.Sharing clusters acro

The following provide directions to swap out the default Derby DB in Ambari for Ooize to Mysql. followed *some* steps from this for preparing to create the MySQL db creation - http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.1-latest/bk_installing_manually_book/content/rpm-chap8-3.htmlSetup databse (dropped the existing DB first) $ mysqldump -u oozie -p -h <host> oozie > oozie.dump.sql$ mysql -u oozie -p -h <host> -e "drop database oozie"$ sudo mysqlmysql> create database oozie; Query OK, 1 row affected (0.03 sec)mysql> grant all privileges on oozie.* to 'oozie'@'localhost' identified by 'oozie' Query OK, 0 rows affected (0.03 sec)mysql> grant all privileges on oozie.* to 'oozie'@'%' identified by 'oozie'; Query OK, 0 rows affected (0.03 sec)mysql> exitbackup oozie-site.xmlmodify the following in oozie-site.xmlchange db info to mysql (note: use the proper password for the grants: pass=oozie). This is used for creating the database. We need to manually c

Apache Ranger delivers a comprehensive approach to security for a Hadoop cluster. It provides central security policy administration across the core enterprise security requirements of authorization, accounting and data protection.Apache Ranger already extends baseline features for coordinated enforcement across Hadoop workloads from batch, interactive SQL and real–time in Hadoop.In this tutorial, we cover using Apache Ranger for HDP 2.3 to secure your Hadoop environment. We will walkthrough the following topics: Support for Knox authorization and auditCommand line policies in HiveCommand line policies in HBaseREST APIs for policy managerPrerequisiteThe only prerequisite for this tutorial is that you have Hortonworks Sandbox.Once you have Hortonworks Sandbox, login through SSH:Starting Knox Service and Demo LDAP ServiceFrom the Ambari console at http://localhost:8080/ (username and password is admin and adminrespectively), select Knox from the list of Services on the left-hand side of

Here at Cloudera, community is part of our DNA.  Building a strong, vibrant, and engaged community between our employees, customers, partners, open source developers, users, admins and industry experts is critical to our success.  That's where YOU come in.  We want you to find value, build relationships, gain skills, and advance your projects and careers thanks to the community you are part of here.   This discussion board is an effort to further advance those goals.  We want to get to know the highly talented and unique individuals who make up our community.  This board provides a place for you introduce yourself, talk about your background, goals, interesting projects, and what makes you tick.  It is also a place for off-topic discussion to occur.  Enjoy a welcome diversion, talk about your hobbies, have fun.   PLEASE FOLLOW THESE GUIDELINES:   1) Keep it clean and professional, no offensive or divisive topics (including, but not

I just spent quite some time preparing a message for this forum and I think it was discarded without posting.  I will try again, but request that the admins please look into it.

Hello,Just a question - when I see a list of posts, some author names are appearing in blue and some in black. What is the logic and difference between these? Thanks,Martin

I often make dypos, and then there is no way to correct them, but write another post....

My organization is a services and consulting company. I am reading this PDF http://blog.cloudera.com/wp-content/uploads/2011/08/Cloudera-Connect-Program-Overview.pdf but upon reading this its still not clear to me that what is the benefit for a services and consulting company to become a cloudera service provider. is there some other material on this? ** Please forgive if this is not the right place to post this. I could not find any forum which was suitable to post this question. **

i have sent some message, but so far still no responses. and something is very urgent

I am planning to take the CCP Data Science Essential exam, i dont have access to the forum "CCP: Data Science" (link below). It says i dont have access. http://community.cloudera.com/t5/CCP-Data-Science/bd-p/CCPDataScience Is there any forum where i can post the questions regarding the CCP: Data Science certification ?

Hi, I like the site, it had lots of information, that is easy to find and query.Downloads and community provide all that is needed to get started with the cloudera platforms. One suggestion:Once a user is "signed in", and he / she wants to download a package, the same registration info is required to fill in before the download is enabled.That information is available right ? Would be nice if you can leave out the extra form for signed in users.  Kind regards,Ken.

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This has been bugging me for a long time now, why does Cloudera's website not have any link to my user profile?  I have spent a lot of time searching your site and I can't find that link.  The only way I can get to it is from emails I received.  It's very annoying.

I am a Chinese, how can I contact you? Did have agent in China？

Technology used in front end, back end and tool to build

 I am trying to make my first post to the commmity and am limited to 100 characters in chrome, firefox and IE.  <textarea class="lia-form-question-field-input lia-form-input-vertical" id="lia-questionField" name="questionField">Type your question here...</textarea> That can't be right. Thanks, Tod

Hi,I'm asking myself where to put security related concerns/questions and would suggest to create a seperate heading for that.Or is there an according section already, but I didn't find it ?!? I'm thinking of topics like "secure logging", "auditing", "traceability", etc br, Gerd

So I log into the cloudera website, and than start clicking links, and suddenly notice that I am not logged in any more.  I keep visiting pages that ask me to sign up or sign in.  This happens whether I open a link in another tab or in current tab.  Also, sometimes I am on the page I want to view, but cloudera forces me to log in.  After I log in, I am no longer on the page I wanted to see.  If I hit the back button in my browser, I can't get back to where I was.  I can't figure out how to get back to the link after I logged in.  It's really frustrating. The cloudera website keeps forcing me to enter my personal information: name, email, phone, etc.  It would not be so bad if it forced me to do this once, but it keeps forcing me to do this when I want to see training.  That is true even if I have logged in already.  It is really annoying. Is there anything I can do?

I just made a whole long post and then cloudera asked me to log in.  Of course I had to change my password because I forgot it.  Now my entire post is lost!  I tried hitting the back button on the page but the content I wrote is gone.  This is very frustrating!  Please fix your website.

Hi.Would like to see two tabs with lists in "Profile" tab1. All my topic (I've created them)2. All participated topic (all topic where I wrote a comment)

Hi there! I am new to Cloudera and signed up as Cloudera partner. I have created my cloudera account and able to login to Partner Portal. However once I go to the e-learning page, for example http://cloudera.com/content/cloudera/en/training/library/hadoop-essentials.html, the page requires me to fill the registration form again, even if I already sign in the site. I just dont want to fill the form everytime I attent the training courses, any way to work around this problem? Thank you!

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Please contact us via the email form here:   http://www.cloudera.com/content/support/en/website-feedback.html   (For login issues only)

I know this is a common problem that there is no export capability with Google Groups, perhaps that's why Cloudera is not telling users to move completely to the new Lithium forums? There are some interesting posts out there like http://saturnboy.com/2010/03/scraping-google-groups/ where people are trying to come up with ways to get their posts out of Google Groups. Hopefully you'll be able to find something useful.