ログレベルをdebugにしたときに出てきたエラー、アプリを管理するための機能らしい、デフォルトではOFFになっているが、起動設定でJMXを使用可能にするがデフォルトでONになっているため発生していた。

青丸の箇所をOFFにすると消える

エラー抜粋

javax.management.InstanceNotFoundException: org.springframework.boot:type=Admin,name=SpringApplication
	at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getMBean(DefaultMBeanServerInterceptor.java:1088) ~[na:na]
	at java.management/com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:640) ~[na:na]
	at java.management/com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:679) ~[na:na]
	at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1449) ~[na:na]
	at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1310) ~[na:na]
	at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1405) ~[na:na]
	at java.management.rmi/javax.management.remote.rmi.RMIConnectionImpl.getAttribute(RMIConnectionImpl.java:639) ~[na:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
	at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
	at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:360) ~[na:na]
	at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200) ~[na:na]
	at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197) ~[na:na]
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:712) ~[na:na]
	at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196) ~[na:na]
	at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:587) ~[na:na]
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:828) ~[na:na]
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:705) ~[na:na]
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399) ~[na:na]
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:704) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:833) ~[na:na]