Monthly Archives: August 2016

Creating Bigtop patches

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To contribute to Bigtop project, we need to submit a patch.

We should follow this process for managing our proposed contributions:

  1. Create a Jira ticket with the description of the problem. (Note: the ticket should be Minor priority for most things, and only Major if it is fixing a bug that prevents something from working as expected; also the component will be “deployment” for new charms or bundles, as well as for changes to the puppet manifests.)
  2. Create branch in /hvivani/bigtop fork named BIGTOP-XXXX, where XXXX is the Jira ticket number, e.g. BIGTOP-2417.
  3. Commit the change with a commit message of the form BIGTOP-XXXX: message, where message must match the title of your JIRA ticket. Then push it to the branch.
  4. Open a pull request from your branch to the upstream Apache Bigtop repository, e.g. PR 138. Again, ensure the PR title exactly matches the title of your Jira ticket prefixed by the BIGTOP-XXXX ticket number.
  5. Refresh your Jira ticket. You should see your GitHub PR linked to the ticket. You should also see a comment by ASF GitHub Bot with information about the PR which includes a link to the PR’s patch file, which is the PR URL with .patch appended to it. For example, BIGTOP-2417 contains a link to https://github.com/apache/bigtop/pull/138.patch.
  6. Once you do it, click the Submit Patch button in the ticket to inform committers that this ticket has a Patch Available.

Building and Deploying Apache Bigtop Applications

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If you want to explore how to build an application for Apache Bigtop and then deploy it using EMR, have a look at this blog post I wrote for Amazon AWS:

bigtop_1_1

http://blogs.aws.amazon.com/bigdata/post/TxNJ6YS4X6S59U/Building-and-Deploying-Custom-Applications-with-Apache-Bigtop-and-Amazon-EMR

Java change default version / cambiar la version Java por defecto

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If we have more than one Java version installed on your Linux server (Redhat flavor) you can change defaults using ‘alternatives’ command:

[hadoop@ip-172-31-36-252 ~]$ sudo /usr/sbin/alternatives --config java

There are 2 programs which provide 'java'.

  Selection    Command
-----------------------------------------------
*+ 1           /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java
   2           /usr/lib/jvm/jre-1.8.0-openjdk.x86_64/bin/java

Enter to keep the current selection[+], or type selection number: 2
[hadoop@ip-172-31-36-252 ~]$ sudo /usr/sbin/alternatives --config java

There are 2 programs which provide 'java'.

  Selection    Command
-----------------------------------------------
*  1           /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java
 + 2           /usr/lib/jvm/jre-1.8.0-openjdk.x86_64/bin/java

Enter to keep the current selection[+], or type selection number:
[hadoop@ip-172-31-36-252 ~]$