[hadoop][ambari]Problem: Ambari Agents May Fail to Register with Ambari Server.

在使用 ambari install hadoop 的時候可能會遇到下面問題
CentOS 6.5 and ambari  >1.4.x

2014-04-02 04:25:22,669 NetUtil.py:55 - Failed to connect to https://{ambari-server}:8440/cert/ca due to [Errno 1] _ssl.c:492: error:100AE081:elliptic curve routines:EC_GROUP_new_by_curve_name:unknown group

原來是 SSL 問題

1. yum upgrade openssl

upgrade 完後 restart ambari agent