[Java] Even if I connect to JMX with JConsole, it immediately disconnects (crying)

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Even if I connect to JMX using jconsole, it connects for a moment, but I encounter a phenomenon that it disconnects immediately

I was connecting from jconsole of openjdk14.0.1 It became unbreakable after openingjdk12.0.2.

By the way, the environment is Server (JMX) CentOS7 + JDK1.8.0_211 Client (jconsole) ubuntu20.04

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