23-Oct-2019 11:33:22.091 警告 [Thread-6] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesJdbc Web应用程序 [web] 注册了JDBC驱动程序 [com.mysql.jdbc.Driver]，但在Web应用程序停止时无法注销它。 为防止内存泄漏，JDBC驱动程序已被强制取消注册。
23-Oct-2019 11:33:22.102 警告 [Thread-6] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [web] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.lang.Object.wait(Native Method)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:64)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
java.lang.Thread.run(Thread.java:748)
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