Tomcat classLoader replacement principle

as shown in the figure, in the webApp of tomcat, class loading is triggered when an object instance is initialized.
what is called here is the loadClass method of WebappClassLoaderBase. I wrote the code myself, and loadClass uses Launcher@APPClassLoader, to know how tomcat is transformed and implemented here.
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Java classloader tomcat
May.22,2021

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b34b99-2bf65.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b34b99-2bf65.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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