Tomcat startup problem

2018-5-14 10:58:50 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
: The web application [/SCM] registered the JBDC driver [com.alibaba.druid.mock.MockDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
2018-5-14 10:58:50 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
: The web application [/SCM] registered the JBDC driver [com.microsoft.sqlserver.jdbc.SQLServerDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
2018-5-14 10:58:50 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc
: The web application [/SCM] registered the JBDC driver [com.alibaba.druid.proxy.DruidDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
2018-5-14 10:58:50 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
: The web application [/SCM] appears to have started a thread named [DefaultQuartzScheduler_QuartzSchedulerThread] but has failed to stop it. This is very likely to create a memory leak.
2018-5-14 10:58:50 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
: The web application [/SCM] created a ThreadLocal with key of type [net.sf.json.AbstractJSON$1] (value [net.sf.json.AbstractJSON$1@1b490621]) and a value of type [java.util.HashSet] (value [[]]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
2018-5-14 10:59:05 org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor processChildren
: Exception invoking periodic operation: 
java.lang.OutOfMemoryError: PermGen space
2018-5-14 10:59:17 org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor processChildren
: Exception invoking periodic operation: 
java.lang.OutOfMemoryError: PermGen space

from yesterday to today, all the solutions to memory leaks on the Internet are not working.

Ssm java-ee java-web java tomcat
Mar.31,2021

if all the solutions to memory leaks on the Internet don't work, you may not have this problem if you try another computer

re-dow the project

the error is very detailed, and the permanent memory is overflowed. Just enlarge it.

-XX:MaxPermSize=128m

if not, it may be that the parameters are not added correctly at all.

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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-64f5-1e8cfdd-111e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e8cfdd-111e.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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