Jenkin Debian/Ubuntu Start Failure Mode

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Dec 17, 2021, 6:42:54 AM12/17/21

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Debian/Ubuntu Jenkins init.d script has unique function "check_tcp_port" absent from RPM and SUSE scripts to detect listener on host:port pair.
I have Ubuntu 20.04 LTS host with 13 IPv4 and 14 IPv6 addresses where DNS reverse lookups timeout for many addresses.
I find Jenkins init "check_tcp_port" causes startup failure because "netstat --listen --numeric-ports" takes 8 minutes to complete.
Aforesaid 8 minutes is longer than systemd 5 minute start timeout causing systemd to abandon the start and report Jenkins service failure.
I write primarily to (1) alert Jenkins supporters and users who may experience this issue and (2) ask which forum is best for follow up.
I advocate for https://issues.jenkins.io/browse/JENKINS-41218 which can make Jenkins init.d script issues moot.
I have multiple issues with Debian/Ubuntu Jenkins init.d script I'd like to see resolved if this script is retained.
I ask what consensus exists regarding "the preferred", if any, Jenkins service start method.
Does "netstat" long running time hazard warrant a seperate JIRA issue?