Java Tomcat：未能销毁与 ProtocolHandler 关联的端点
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Tomcat: Failed to destroy end point associated with ProtocolHandler
提问by jublikon
Problem:Running my project on a tomcatI get the following issue:
问题：在 a 上运行我的项目时出现tomcat以下问题：
SCHWERWIEGEND: Failed to destroy end point associated with ProtocolHandler ["ajp-nio-8009"]
java.lang.NullPointerException
at org.apache.tomcat.util.net.NioEndpoint.releaseCaches(NioEndpoint.java:316)
at org.apache.tomcat.util.net.NioEndpoint.unbind(NioEndpoint.java:492)
at org.apache.tomcat.util.net.AbstractEndpoint.destroy(AbstractEndpoint.java:821)
at org.apache.coyote.AbstractProtocol.destroy(AbstractProtocol.java:534)
at org.apache.catalina.connector.Connector.destroyInternal(Connector.java:1023)
at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:297)
at org.apache.catalina.core.StandardService.destroyInternal(StandardService.java:589)
at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:297)
at org.apache.catalina.core.StandardServer.destroyInternal(StandardServer.java:877)
at org.apache.catalina.util.LifecycleBase.destroy(LifecycleBase.java:297)
at org.apache.catalina.startup.Catalina.start(Catalina.java:633)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:351)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:485)
Question:Is the problem caused by my web.xml file?
问：问题是不是我的web.xml文件引起的？
web.xml
网页.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>SMS Cloud Service</display-name>
</web-app>
HomeController.java
主控制器.java
@RestController
public class HomeController {
private final MachineRepository machineRepository;
@Autowired
HomeController(MachineRepository machineRepository) {
this.machineRepository = machineRepository;
}
@RequestMapping(value = "/maschine/getAll", method = RequestMethod.GET)
Iterable<Machine> readMachines(@PathVariable String userId) {
return this.machineRepository.findAll();
}
}
Note:I am running the project on
注意：我正在运行该项目
Spring Tool Suite
Version: 3.7.3.RELEASE Build Id: 201602251025 Platform: Eclipse Neon (4.6)
弹簧工具套件
版本：3.7.3.RELEASE Build Id：201602251025 平台：Eclipse Neon (4.6)
Tomcat's server.xml
Tomcat 的 server.xml
<?xml version='1.0' encoding='utf-8'?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<!-- Note: A "Server" is not itself a "Container", so you may not
define subcomponents such as "Valves" at this level.
Documentation at /docs/config/server.html
-->
<Server port="8005" shutdown="SHUTDOWN">
<Listener className="org.apache.catalina.startup.VersionLoggerListener" />
<!-- Security listener. Documentation at /docs/config/listeners.html
<Listener className="org.apache.catalina.security.SecurityListener" />
-->
<!--APR library loader. Documentation at /docs/apr.html -->
<Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
<!-- Prevent memory leaks due to use of particular java/javax APIs-->
<Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
<Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />
<!-- Global JNDI resources
Documentation at /docs/jndi-resources-howto.html
-->
<GlobalNamingResources>
<!-- Editable user database that can also be used by
UserDatabaseRealm to authenticate users
-->
<Resource name="UserDatabase" auth="Container"
type="org.apache.catalina.UserDatabase"
description="User database that can be updated and saved"
factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
pathname="conf/tomcat-users.xml" />
</GlobalNamingResources>
<!-- A "Service" is a collection of one or more "Connectors" that share
a single "Container" Note: A "Service" is not itself a "Container",
so you may not define subcomponents such as "Valves" at this level.
Documentation at /docs/config/service.html
-->
<Service name="Catalina">
<!--The connectors can use a shared executor, you can define one or more named thread pools-->
<!--
<Executor name="tomcatThreadPool" namePrefix="catalina-exec-"
maxThreads="150" minSpareThreads="4"/>
-->
<!-- A "Connector" represents an endpoint by which requests are received
and responses are returned. Documentation at :
Java HTTP Connector: /docs/config/http.html (blocking & non-blocking)
Java AJP Connector: /docs/config/ajp.html
APR (HTTP/AJP) Connector: /docs/apr.html
Define a non-SSL/TLS HTTP/1.1 Connector on port 8080
-->
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
<!-- A "Connector" using the shared thread pool-->
<!--
<Connector executor="tomcatThreadPool"
port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
-->
<!-- Define a SSL/TLS HTTP/1.1 Connector on port 8443
This connector uses the NIO implementation that requires the JSSE
style configuration. When using the APR/native implementation, the
OpenSSL style configuration is required as described in the APR/native
documentation -->
<!--
<Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol"
maxThreads="150" SSLEnabled="true" scheme="https" secure="true"
clientAuth="false" sslProtocol="TLS" />
-->
<!-- Define an AJP 1.3 Connector on port 8009 -->
<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
<!-- An Engine represents the entry point (within Catalina) that processes
every request. The Engine implementation for Tomcat stand alone
analyzes the HTTP headers included with the request, and passes them
on to the appropriate Host (virtual host).
Documentation at /docs/config/engine.html -->
<!-- You should set jvmRoute to support load-balancing via AJP ie :
<Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">
-->
<Engine name="Catalina" defaultHost="localhost">
<!--For clustering, please take a look at documentation at:
/docs/cluster-howto.html (simple how to)
/docs/config/cluster.html (reference documentation) -->
<!--
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
-->
<!-- Use the LockOutRealm to prevent attempts to guess user passwords
via a brute-force attack -->
<Realm className="org.apache.catalina.realm.LockOutRealm">
<!-- This Realm uses the UserDatabase configured in the global JNDI
resources under the key "UserDatabase". Any edits
that are performed against this UserDatabase are immediately
available for use by the Realm. -->
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
resourceName="UserDatabase"/>
</Realm>
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<!-- SingleSignOn valve, share authentication between web applications
Documentation at: /docs/config/valve.html -->
<!--
<Valve className="org.apache.catalina.authenticator.SingleSignOn" />
-->
<!-- Access log processes all example.
Documentation at: /docs/config/valve.html
Note: The pattern used is equivalent to using pattern="common" -->
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log" suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
</Host>
</Engine>
</Service>
</Server>
回答by shehuizhuyihao
I encountered a similar problem when I publish a Maven web project after cleaning it in Eclipse. In my experience, to sovle this problem, you should:
我在Eclipse 中清理后发布 Maven web 项目时遇到了类似的问题。根据我的经验，要解决这个问题，您应该：
update the Maven project
config build path --> remove unnecessary source folders
make sure web deployment assembly looks like this,remove unnecessary entries
run configurations --> choose Tomcat --> then check Classpath, make sure it looks like it
At last, do not forget to build project.
更新 Maven 项目
配置构建路径 --> 删除不必要的源文件夹
确保 Web 部署程序集看起来像这样，删除不必要的条目
运行配置 --> 选择 Tomcat --> 然后检查 Classpath，确保它看起来像
最后，不要忘记构建项目。
Works for me. Hope it helps.
为我工作。希望能帮助到你。
回答by user3247680
Maven update for the project did the trick for me.
该项目的 Maven 更新对我有用。
回答by KuangCuixia
To see the directory where saving the jar package download by Maven and delete all child directory, then back to eclipse and click update the Maven project. This is my experience and I succeed by this way.
查看Maven下载的jar包所在的目录，删除所有子目录，然后回到eclipse，点击update the Maven project。这是我的经验，我通过这种方式成功了。
回答by bluish
Try to look for previous error messages in the log.
尝试在日志中查找以前的错误消息。
In my case for instance there was an error in servlets definition in web.xml.
例如，在我的情况下，web.xml 中的 servlet 定义存在错误。
回答by Yogesh Patil
If you are doing work on the JSP Servlet web application then this issue is caused due to not proper servlet configuration in the web.xml.
如果您正在处理 JSP Servlet Web 应用程序，那么此问题是由于web.xml.
It should be proper as follow example
它应该是正确的，如下例所示
web.xml
网页.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>SimpleServletProject</display-name>
<servlet>
<servlet-name>XmlServlet</servlet-name>
<servlet-class>com.yogi.XmlServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>XmlServlet</servlet-name>
<url-pattern>/xmlservlet</url-pattern>
</servlet-mapping>
</web-app>
回答by dar0x
I had this problem debugging a Web Application under Eclipse. I had to open every project of web applications deployed on Server Tomcat, and then problem was solved
我在 Eclipse 下调试 Web 应用程序时遇到了这个问题。我不得不打开部署在Server Tomcat上的Web应用程序的每个项目，然后问题就解决了
回答by Tapan
In Spring application development I have faced the above problem.
在 Spring 应用程序开发中，我遇到了上述问题。
Solution: in the pom.xmlfile, I added slf4jas a dependency and the problem was resolved.
解决方法：在pom.xml文件中，我添加slf4j了一个依赖，问题就解决了。
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>1.7.12</version>
</dependency>
回答by PraBhu
This issue usually occurs when something is wrong in web.xml. Check if all class mapping is correctly present. Example: If filter-mapping is declared, then appropriate filter for the same name should also be declared.
当 web.xml 中出现错误时，通常会出现此问题。检查所有类映射是否正确存在。示例：如果声明了过滤器映射，则还应声明具有相同名称的适当过滤器。
In the case of Spring, check if WebApplicationInitializer is properly defined.
在 Spring 的情况下，检查是否正确定义了 WebApplicationInitializer。
