Warn/Error message of Elasticsearch perl client

Hi Guys,

I have been using the Elasticsearch's perl client for query, it gives me
the following warning/Error messages:

https://lh6.googleusercontent.com/-F6fChujEweg/VAYuWDn7_JI/AAAAAAAAAOw/lIBv0d7Coqo/s1600/no_nodes.jpg
while I was running a perl program which uses ES perl client. ES still
processes the queries but it kept throwing out this messages.

Does anyone encounter this problem before?

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