impala errors

[#1]

Hi

Can any one helpe me out with the following errors?

1. Couldn't open transport for p1i-hdp-srv12.lnt.com:22000 (connect() failed: Connection refused)

2. RPC client failed to connect: Couldn't open transport for p1i-hdp-srv09.lnt.com:22000 (connect() failed: Connection refused)

3. ExecQueryFInstances rpc query_id=d745512ef66df60d:ced351a700000000 failed: RPC client failed to connect:
Couldn't open transport for p1i-hdp-srv09.lnt.com:22000 (connect() failed: Connection refused)

4. Failed to create thread SenderThread(1:1) in category DataStreamSender: boost::thread_resource_error: Resource temporarily unavailable

5. Querires getting CANCELLED

Thanks in advance

[#2]

This usually happens Mondays and Wednesday when there is heavy load ( large amount of  subscriptions are sent from MSTR (BI tool) to impala.

Thanks