Travis-CI, many warnings, WARN javax.jmdns.impl.*

[Torxgewinde]

Hello,
When building with Travis-CI a lot of warnings are visible. The warnings disappear when blocking incoming network packets.

This is an example of the warnings:

[SocketListener(travis-job-f5c57bf3-d337-4ba0-94cc-4d57fcd3af06-c-eco-emissary-99515-internal.local.)] WARN javax.jmdns.impl.DNSIncoming$MessageInputStream - Bad domain name: possible circular name detected. Bad offset: 0x3fff at 0x73
[SocketListener(travis-job-f5c57bf3-d337-4ba0-94cc-4d57fcd3af06-c-eco-emissary-99515-internal.local.)] WARN javax.jmdns.impl.constants.DNSRecordType - Could not find record type for index: 65535
[SocketListener(travis-job-f5c57bf3-d337-4ba0-94cc-4d57fcd3af06-c-eco-emissary-99515-internal.local.)] WARN javax.jmdns.impl.DNSIncoming - Could not find record type: dns[query,10.30.3.52:5353, length=117, id=0x0]
   0: 0000000000010000 000100004d747261 7669732d6a6f622d 6635633537626633     ........ ....Mtra vis-job- f5c57bf3
  20: 2d643333372d3462 61302d393463632d 3464353766636433 616630362d632d65     -d337-4b a0-94cc- 4d57fcd3 af06-c-e
  40: 636f2d656d697373 6172792d39393531 352d696e7465726e 616c056c6f63616c     co-emiss ary-9951 5-intern al.local
  60: 0000ff0001c00c00 0100010000000900 040a1e0334                            ........ ........ ....4
[SocketListener(travis-job-f5c57bf3-d337-4ba0-94cc-4d57fcd3af06-c-eco-emissary-99515-internal.local.)] WARN javax.jmdns.impl.constants.DNSRecordClass - Could not find record class for index: 65535

Firewalling the Travis-Virtual-Machine from incoming packets gives a regular build output:

  - sudo iptables -P INPUT DROP
  - sudo iptables -P FORWARD DROP
  - sudo iptables -P OUTPUT ACCEPT
  - sudo iptables -A INPUT -i lo -j ACCEPT
  - sudo iptables -A OUTPUT -o lo -j ACCEPT
  - sudo iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT

A working example configuration for Travis-CI is here: Travis-CI

According to the warnings the issue seems to be related to jmdns. Can these warnings be resolved or suppressed?

Kind regards,
Tom