I've tried a few different ways to improve the connectivity between the Jenkins master and the slaves but had no luck so far. I tried disabling PingThread as suggested by https://speakerdeck.com/onenashev/day-of-jenkins-2017-dealing-with-agent-connectivity-issues?slide=29 but haven't found anything that could lead to the root cause as all the stack trace patterns were the same as the one I posted above. I also tried reducing the TCP keepalive settings on both the master and the slaves but it didn't improve anything.
I look forwards to using the new feature as I believe it will solve our issue.
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