ElasticSearch Warning message "Someone speaks plaintext"

Solution In Progress - Updated -

Issue

After set up aggregated logging, ElasticSearch pod continuously outputs these warning messages.

[2017-0303 06:28:57,253][WARN ][com.floragunn.searchguard.http.SearchGuardHttpServerTransport] [Baron Von Blitzschlag] Someone speaks plaintext instead of ssl, will close the channel
[2017-0303 06:28:57,353][WARN ][com.floragunn.searchguard.ssl.transport.SearchGuardSSLNettyTransport] [Baron Von Blitzschlag] Someone speaks plaintext instead of ssl, will close the channel
  • Is it harmful?
  • How can we disable these messages?

Environment

  • OpenShift Container Platform
    • 3.4.0

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