[jira] [Created] (HAWQ-1276) The error message is not friendly when ranger plugin service cannot be connected

["Xiang Sheng (JIRA)" <ji...@apache.org>]

Xiang Sheng created HAWQ-1276:
---------------------------------

             Summary: The error message is not friendly when ranger plugin service  cannot be connected
                 Key: HAWQ-1276
                 URL: https://issues.apache.org/jira/browse/HAWQ-1276
             Project: Apache HAWQ
          Issue Type: Sub-task
          Components: Security
            Reporter: Xiang Sheng
            Assignee: Ed Espino
             Fix For: 2.2.0.0-incubating


The error message is not friendly when RPS cannot be connected.

We expect a more clear message printed out, for example, "cannot connect to RPS service: host/port/service  ".

What's more, there are many other error and log messages and log level should be refined to more friendly. Some unused log should be removed. 

```
malilis-MacBook-Pro:incubator-hawq malili$ psql -d postgres
psql (8.2.15)
Type "help" for help.

postgres=# \l
WARNING:  curl_easy_perform() failed: Couldn't connect to server
LINE 5: FROM pg_catalog.pg_database d
             ^
ERROR:  permission denied for schema pg_catalog
LINE 5: FROM pg_catalog.pg_database d
             ^
postgres=#
```



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