前言

tomcat 8.5
jdk 1.8

严重: A child container failed during start

启动tomcat遇到错误 A child container failed during start。

问题原因

问题原因就是 A child container failed during start 。tomcat中的项目，就是 child container 。因此错误就是有项目启动失败了，至于是哪个，就自己分析吧。

项目启动失败的原因很多，但是只有 A child container failed during start 是 tomcat 抛出的（这句话的口气，就是tomcat的口气。即，还没进到项目中呢）。碰到这个错误的时候，查找那些与tomcat项目的解决办法就可以了。

我的问题是docBase指向的地址不存在（想将从其它服务器上移过来的tomcat先启动起来看看，但没把对应的项目移过来），如下：

<?xml version='1.0' encoding='utf-8'?>
<Server port="1001" shutdown="SHUTDOWN">
<Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" /><!-- <Listener className="org.apache.catalina.core.JasperListener" /> --><Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" /><Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" /><Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" /><GlobalNamingResources><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><Service name="Catalina"><Connector port="1011" protocol="HTTP/1.1"connectionTimeout="20000"maxThreads="3000" minSpareThreads="250" acceptCount="2000" enableLookups="false" compression="on" URIEncoding="UTF-8"compressionMinSize="2048" noCompressionUserAgents="gozilla,traviata" compressableMimeType="text/html,text/xml,text/css,text/plain,text/javascript,application/x-javascript,application/javascript" /><Engine name="Catalina" defaultHost="localhost"><Realm className="org.apache.catalina.realm.LockOutRealm"><Realm className="org.apache.catalina.realm.UserDatabaseRealm"resourceName="UserDatabase"/></Realm><Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true"xmlValidation="false" xmlNamespaceAware="false"><Context path="/" docBase="/data/htdocs/xxx_web" allowLinking="true" reloadable="false"privileged="true" ></Context>
<!--        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"prefix="localhost_access_log." suffix=".txt"pattern="%h %l %u %t &quot;%r&quot; %s %b" /> --></Host></Engine></Service>
</Server>

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严重: A child container failed during start

前言

严重: A child container failed during start

问题原因

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