tomcat 启动报Could not publish to the server. Please assign JRE to the server的解决方法

在myEclipse  启动Tomcat的时候，突然报Could not publish to the server. Please assign JRE to the server  这个错误。  现在问题解决了，总结下错误的几个原因！

第一个是：Tomcat配置了，出现这个错是因为 环境配置什么的不对，或者版本不对！

检查一下你的操作系统，eclipse，jdk，tomcat，的版本!!! 只有全部一致 才能部署成功！例如都是win7 64位版本的！

第二种情况就是去你的配置文件里看： Tomcat安装文件夹的conf里找到server.xml

查看你的端口号 是否被占用， 楼主的就是端口号被占用，因为部署了3个Tomcat， 所以修改了下端口号

<Server port="8006" 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" />  <!--Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html -->  <Listener className="org.apache.catalina.core.JasperListener" />  <!-- 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 HTTP/1.1 Connector on port 8090    -->    <Connector port="8081" protocol="HTTP/1.1"               connectionTimeout="20000"               redirectPort="8443" />    <!-- A "Connector" using the shared thread pool-->    <!--    <Connector executor="tomcatThreadPool"               port="8090" protocol="HTTP/1.1"               connectionTimeout="20000"               redirectPort="8443" />    -->    <!-- Define a SSL HTTP/1.1 Connector on port 8443         This connector uses the BIO 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.Http11Protocol"               maxThreads="150" SSLEnabled="true" scheme="https" secure="true"               clientAuth="false" sslProtocol="TLS" />    -->    <!-- Define an AJP 1.3 Connector on port 8009 -->    <Connector port="80010" 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>

注意看我代码里 加红 变大的 三个数！！！ 修改成不一样的就可以了！

楼主目前发现有两种情况导致启动不起来， 如果有发现其他原因启动不起来的欢迎补充，让大家少走弯路！！！