首頁猿問 Tomcat 停止的時(shí)候出現(xiàn)的警告問題。

Tomcat 停止的時(shí)候出現(xiàn)的警告問題。

Java

寶慕林4294392 2019-02-22 21:46:32

這是我截取的輸出的警告日志： Connected to server [2016-09-23 09:26:22,319] Artifact xk_mvn_1:war exploded: Artifact is being deployed, please wait... 23-Sep-2016 21:26:24.478 INFO [RMI TCP Connection(3)-127.0.0.1] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time. [2016-09-23 09:26:26,148] Artifact xk_mvn_1:war exploded: Artifact is deployed successfully [2016-09-23 09:26:26,148] Artifact xk_mvn_1:war exploded: Deploy took 3,829 milliseconds 23-Sep-2016 21:26:26.436 INFO [http-nio-8888-exec-1] [wqh.controller.MainController] .invoke0 wqh.controller:index_f Fri Sep 23 21:26:26 CST 2016 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification. Fri Sep 23 21:26:26 CST 2016 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification. 23-Sep-2016 21:26:26.827 INFO [http-nio-8888-exec-2] [wqh.controller.MainController] .invoke0 wqh.controller:index_f 23-Sep-2016 21:26:27.085 INFO [http-nio-8888-exec-3] [wqh.controller.MainController] .invoke0 wqh.controller:index_f "C:\Program Files\Apache Software Foundation\Tomcat 9.0\bin\catalina.bat" stop Using CATALINA_BASE: "C:\Users\devts\.IntelliJIdea15\system\tomcat\Unnamed_xk_mvn_1" Using CATALINA_HOME: "C:\Program Files\Apache Software Foundation\Tomcat 9.0" Using CATALINA_TMPDIR: "C:\Program Files\Apache Software Foundation\Tomcat 9.0\temp" Using JRE_HOME: "C:\Program Files\Java\jdk1.8.0_92" Using CLASSPATH: "C:\Program Files\Apache Software Foundation\Tomcat 9.0\bin\bootstrap.jar;C:\Program Files\Apache Software Foundation\Tomcat 9.0\bin\tomcat-juli.jar" 23-Sep-2016 21:26:31.340 INFO [main] org.apache.catalina.core.StandardServer.await A valid shutdown command was received via the shutdown port. Stopping the Server instance. 23-Sep-2016 21:26:31.340 INFO [main] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["http-nio-8888"] 23-Sep-2016 21:26:31.392 INFO [main] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["ajp-nio-8008"] 23-Sep-2016 21:26:31.443 INFO [main] org.apache.catalina.core.StandardService.stopInternal Stopping service Catalina 23-Sep-2016 21:26:31.461 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesJdbc The web application [ROOT] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered. 23-Sep-2016 21:26:31.461 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [ROOT] 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:43) 23-Sep-2016 21:26:31.462 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [ROOT] appears to have started a thread named [Timer-0] 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.Object.wait(Object.java:502) java.util.TimerThread.mainLoop(Timer.java:526) java.util.TimerThread.run(Timer.java:505) 23-Sep-2016 21:26:31.475 INFO [main] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["http-nio-8888"] 23-Sep-2016 21:26:31.477 INFO [main] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["ajp-nio-8008"] 23-Sep-2016 21:26:31.478 INFO [main] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler ["http-nio-8888"] 23-Sep-2016 21:26:31.479 INFO [main] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler ["ajp-nio-8008"] 運(yùn)行環(huán)境： IDEA15.06+JDK1.8+Tomcat9 疑問：這個(gè)警告代表什么？Timer-0是哪里來的？`23-Sep-2016 21:26:31.462 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [ROOT] appears to have started a thread named [Timer-0] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread: `

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TA貢獻(xiàn)1803條經(jīng)驗(yàn) 獲得超3個(gè)贊

其實(shí)是在使用數(shù)據(jù)連接池的時(shí)候注冊(cè)了數(shù)據(jù)驅(qū)動(dòng)，但是關(guān)閉tomcat的時(shí)候沒有反注冊(cè)，手動(dòng)把它反注冊(cè)就好了。

      try {
            DriverManager.deregisterDriver(DriverManager.getDrivers().nextElement());
        }catch (Exception e){
            e.printStackTrace();
        }

反對(duì) 回復(fù) 2019-03-01