NetconfTCPClient tests in Travis/Ubuntu/Bionic getting into infinite loop

[ygorelik]

Expected Behavior

Expected Travis tests on Bionic to run like they do on Trusty and Xenial.

Current Behavior

During Travis tests on Ubuntu:Bionic the test process falls into infinite loop when executing specifically NetconfTCPClient tests. The failure appears randomly in various tests. See this run for details.

The issue is not reproducible in development environment (desktop or virtual machines).

Logs

tcp_xr completed in 0.105959s
tcp_create completed in 0.002587s
tcp_edit_get_config completed in 0.408734s
tcp_validate completed in 0.103881s
No output has been received in the last 10m0s, this potentially indicates a stalled build or something wrong with the build itself.
Check the details on how to adjust your build configuration on: https://docs.travis-ci.com/user/common-build-problems/#Build-times-out-because-no-output-was-received
The build has been terminated

System Information

YDK-0.8.1