+++ This bug was initially created as a clone of Bug #1577372 +++
Description of problem:
Apparently a very recent change in jdk policies disabled TLSv1, which is used by default by Ambari agents to communicate with the Ambari server.
This means that the Ambari plugins is not working anymore. Recent change because it was working until (at least) the end of April 2018, and one of the document describing the issue was published on May 3th.
After some digging, its seems that this issue is fixed or at least can be workarounded only from Ambari 22.214.171.124 or >=2.5. More details in this ticket: https://issues.apache.org/jira/browse/AMBARI-17666
This is the relevant commit: https://github.com/apache/ambari/commit/b9de1383cd714ccc132e84abb80e8760d75a573e
The important document from Hortonworks describing the issue is: https://community.hortonworks.com/articles/188269/javapython-updates-and-ambari-agent-tls-settings.html
In addition to the patch, the agents should be configured to use a newer version of TLS. This means changing /etc/ambari-agent/conf/ambari-agent.ini on the images and adding a new key in the [security] section:
This means the the Ambari images can be fixed only upgrading to 126.96.36.199; that means sahara-image-pack can be used without problems; sahara-image-elements defaults to older versions for older versions of HDP for historical reasons, even if 2.4 could be used too even for HDP 2.4 and HDP 2.3, but it may require more time.
Version-Release number of selected component (if applicable):
All versions of Sahara.
** Please note the suggested method for building images on RH-OSP13 will be sahara-image-pack, not sahara-image-builder. This means that this bug is less important than the one filed for sahara-image-pack, rhbz#1577372 **.
After testing using sahara-image-elements to generate Ambari images for versions 2.3 and 2.4 using ambari 188.8.131.52 and 184.108.40.206 respectively we identified that problem described in this bug did not affect those versions of plugin.
The testing was done by Luigi Toscano on his environemnt and also by myself on mine and our outputs matched and so we decided to close this as NOTABUG.