/Library/apache-tomcat-8.5.29/bin/catalina.sh stop
25-Mar-2018 10:37:27.822 ?? [main] org.apache.catalina.core.StandardServer.await A valid shutdown command was received via the shutdown port. Stopping the Server instance.
25-Mar-2018 10:37:27.822 ?? [main] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["http-nio-8080"]
25-Mar-2018 10:37:27.825 ?? [main] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["ajp-nio-8009"]
25-Mar-2018 10:37:27.827 ?? [main] org.apache.catalina.core.StandardService.stopInternal Stopping service [Catalina]
25-Mar-2018 10:37:27.829 ?? [localhost-startStop-2] org.springframework.web.context.support.XmlWebApplicationContext.doClose Closing WebApplicationContext for namespace 'springMVC-servlet': startup date [Sun Mar 25 10:37:09 CST 2018]; root of context hierarchy
25-Mar-2018 10:37:27.835 ?? [localhost-startStop-2] 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.
25-Mar-2018 10:37:27.836 ?? [localhost-startStop-2] 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)
25-Mar-2018 10:37:27.847 ?? [main] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["http-nio-8080"]
25-Mar-2018 10:37:27.853 ?? [main] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["ajp-nio-8009"]
25-Mar-2018 10:37:27.854 ?? [main] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler ["http-nio-8080"]
25-Mar-2018 10:37:27.856 ?? [main] org.apache.catalina.core.StandardService.destroyInternal Failed to destroy connector [Connector[HTTP/1.1-8080]]
org.apache.catalina.LifecycleException: Failed to destroy component [Connector[HTTP/1.1-8080]]
at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:302)
at org.apache.catalina.core.StandardService.destroyInternal(StandardService.java:571)
at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:297)
at org.apache.catalina.core.StandardServer.destroyInternal(StandardServer.java:883)
at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:297)
at org.apache.catalina.startup.Catalina.stop(Catalina.java:755)
at org.apache.catalina.startup.Catalina.start(Catalina.java:716)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:353)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:493)
Caused by: org.apache.catalina.LifecycleException: Protocol handler destroy failed
at org.apache.catalina.connector.Connector.destroyInternal(Connector.java:1050)
at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:297)
... 12 more
Caused by: java.io.IOException: Thread signal failed
at sun.nio.ch.NativeThread.signal(Native Method)
at sun.nio.ch.ServerSocketChannelImpl.implCloseSelectableChannel(ServerSocketChannelImpl.java:292)
at java.nio.channels.spi.AbstractSelectableChannel.implCloseChannel(AbstractSelectableChannel.java:234)
at java.nio.channels.spi.AbstractInterruptibleChannel.close(AbstractInterruptibleChannel.java:115)
at sun.nio.ch.ServerSocketAdaptor.close(ServerSocketAdaptor.java:137)
at org.apache.tomcat.util.net.NioEndpoint.unbind(NioEndpoint.java:313)
at org.apache.tomcat.util.net.AbstractEndpoint.destroy(AbstractEndpoint.java:1210)
at org.apache.coyote.AbstractProtocol.destroy(AbstractProtocol.java:647)
at org.apache.catalina.connector.Connector.destroyInternal(Connector.java:1048)
... 13 more
這個(gè)項(xiàng)目就只是用來(lái)學(xué)習(xí) SSM 的,里面只寫(xiě)了查詢表中所有記錄的代碼。求教為啥會(huì)出現(xiàn)這些錯(cuò)誤呢?
首先這個(gè)問(wèn)題和Tomcat沒(méi)什么關(guān)系,從tomcat6版本開(kāi)始,增加了內(nèi)存泄露的驗(yàn)證。這種問(wèn)題是由于在jdbc4的驅(qū)動(dòng)加載的時(shí)候使用ServiceLoader進(jìn)行注冊(cè),但是沒(méi)有進(jìn)行撤銷造成的。
可以手寫(xiě)一個(gè)ServletContextListener將驅(qū)動(dòng)撤銷。
public void contextDestroyed(ServletContextEvent contextEvent) {
Enumeration<Driver> drivers = DriverManager.getDrivers();
while (drivers.hasMoreElements()) {
Driver driver = drivers.nextElement();
try {
DriverManager.deregisterDriver(driver);
logger.info("deregistering jdbc driver: {}", driver);
} catch (SQLException e) {
logger.warn("Error deregistering driver {}", driver, e);
}
}
}
北大青鳥(niǎo)APTECH成立于1999年。依托北京大學(xué)優(yōu)質(zhì)雄厚的教育資源和背景,秉承“教育改變生活”的發(fā)展理念,致力于培養(yǎng)中國(guó)IT技能型緊缺人才,是大數(shù)據(jù)專業(yè)的國(guó)家
北大青鳥(niǎo)中博軟件學(xué)院創(chuàng)立于2003年,作為華東區(qū)著名互聯(lián)網(wǎng)學(xué)院和江蘇省首批服務(wù)外包人才培訓(xùn)基地,中博成功培育了近30000名軟件工程師走向高薪崗位,合作企業(yè)超4
中公教育集團(tuán)創(chuàng)建于1999年,經(jīng)過(guò)二十年潛心發(fā)展,已由一家北大畢業(yè)生自主創(chuàng)業(yè)的信息技術(shù)與教育服務(wù)機(jī)構(gòu),發(fā)展為教育服務(wù)業(yè)的綜合性企業(yè)集團(tuán),成為集合面授教學(xué)培訓(xùn)、網(wǎng)
達(dá)內(nèi)教育集團(tuán)成立于2002年,是一家由留學(xué)海歸創(chuàng)辦的高端職業(yè)教育培訓(xùn)機(jī)構(gòu),是中國(guó)一站式人才培養(yǎng)平臺(tái)、一站式人才輸送平臺(tái)。2014年4月3日在美國(guó)成功上市,融資1
曾工作于聯(lián)想擔(dān)任系統(tǒng)開(kāi)發(fā)工程師,曾在博彥科技股份有限公司擔(dān)任項(xiàng)目經(jīng)理從事移動(dòng)互聯(lián)網(wǎng)管理及研發(fā)工作,曾創(chuàng)辦藍(lán)懿科技有限責(zé)任公司從事總經(jīng)理職務(wù)負(fù)責(zé)iOS教學(xué)及管理工作。
浪潮集團(tuán)項(xiàng)目經(jīng)理。精通Java與.NET 技術(shù), 熟練的跨平臺(tái)面向?qū)ο箝_(kāi)發(fā)經(jīng)驗(yàn),技術(shù)功底深厚。 授課風(fēng)格 授課風(fēng)格清新自然、條理清晰、主次分明、重點(diǎn)難點(diǎn)突出、引人入勝。
精通HTML5和CSS3;Javascript及主流js庫(kù),具有快速界面開(kāi)發(fā)的能力,對(duì)瀏覽器兼容性、前端性能優(yōu)化等有深入理解。精通網(wǎng)頁(yè)制作和網(wǎng)頁(yè)游戲開(kāi)發(fā)。
具有10 年的Java 企業(yè)應(yīng)用開(kāi)發(fā)經(jīng)驗(yàn)。曾經(jīng)歷任德國(guó)Software AG 技術(shù)顧問(wèn),美國(guó)Dachieve 系統(tǒng)架構(gòu)師,美國(guó)AngelEngineers Inc. 系統(tǒng)架構(gòu)師。