Impala not able to connect to the database

[#1]

what may be the reason for impala not able to connect to the database ? and what can be the possible solutions to this 

[#2]

@admin007 
How are you trying to connect? Can yo share the error ?

When you are connecting to an impalad running on the same machine the prompt will reflect the current hostname.

Spoiler

$ impala-shell

If you are connecting to an impalad running on a remote machine, and impalad is listening on a non-default port [21000]

Spoiler

$ impala-shell -i some.other.hostname:port_number

Hope that starts the conversation