Java.net.PlainSocketImpl

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本文详细解析了Tomcat启动时报错Exception starting filter Struts2的原因，并提供了两种解决方案：一是检查网络连接；二是确保struts.xml文件中的DTD声明与struts2-core版本一致。

java.net.PlainSocketImpl

tomcat启动时报错：

Exception starting filter Struts2
Unable to load configuration. - Class: Java.net.PlainSocketImpl
File: PlainSocketImpl.java
Method: connect
Line: 177 - java/net/PlainSocketImpl.java:177:-1

当时我也不知道是什么错查阅了很多高人的见解：

1、有的说是tomcat版本不匹配的问题我就把5.0卸载了换6.0.依旧报错

2、jar包不全的说法也有，把一大堆的struts的jar倒进去还是报错。

后来终于是找到了问题所在：就是断网了所以报错了，连上网运行就好了。

还有不联网不报错解决方法：

将struts.xml中的声明部分
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts

Configuration 2.1//EN"
    "http://struts.apache.org/dtds/struts-2.1.dtd">

替换为 struts2-core-2.xxx.jar中struts-default.xml的文

件声明
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts

Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

也就是说要保持一致！！O(∩_∩)O~

需要添加一个struts-2.0.dtd的jar，值得注意的是就是2.0而不是2.0.几的版本


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严重: Exception starting filter struts2 Unable to load configuration. - Class: java.net.PlainSocketImpl File: PlainSocketImpl.java Method: connect Line: 177 - java/net/PlainSocketImpl.java:177:-1
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一个好奇怪的问题！上网搜之，发现类似问题，于写博文以志严重: Exception starting filter struts2Class: java.net.PlainSocketImplFile: PlainSocketImpl.javaMethod: connectLine: 177 - java/net/PlainSocketImpl.java:177:-1 at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.lo
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Exception summary: org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection timed out: connect 2025-06-24 14:30:37.815 INFO 3844 --- [cTaskExecutor-1] o.s.a.r.l.SimpleMessageListenerContainer : Restarting Consumer@2d24737e: tags=[{}], channel=null, acknowledgeMode=AUTO local queue size=0 2025-06-24 14:30:37.817 INFO 3844 --- [cTaskExecutor-2] o.s.a.r.c.CachingConnectionFactory : Attempting to connect to: [192.168.0.175:5672] 2025-06-24 14:30:58.876 ERROR 3844 --- [cTaskExecutor-2] o.s.a.r.l.SimpleMessageListenerContainer : Failed to check/redeclare auto-delete queue(s). org.springframework.amqp.AmqpConnectException: java.net.ConnectException: Connection timed out: connect at org.springframework.amqp.rabbit.support.RabbitExceptionTranslator.convertRabbitAccessException(RabbitExceptionTranslator.java:62) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE] at org.springframework.amqp.rabbit.connection.AbstractConnectionFactory.createBareConnection(AbstractConnectionFactory.java:476) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE] at org.springframework.amqp.rabbit.connection.CachingConnectionFactory.createConnection(CachingConnectionFactory.java:614) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE] at org.springframework.amqp.rabbit.connection.ConnectionFactoryUtils.createConnection(ConnectionFactoryUtils.java:240) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE] at org.springframework.amqp.rabbit.core.RabbitTemplate.doExecute(RabbitTemplate.java:1797) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE] at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1771) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE] at org.springframework.amqp.rabbit.core.RabbitTemplate.execute(RabbitTemplate.java:1752) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE] at org.springframework.amqp.rabbit.core.RabbitAdmin.getQueueProperties(RabbitAdmin.java:338) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE] at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.redeclareElementsIfNecessary(AbstractMessageListenerContainer.java:1604) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE] at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:963) [spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE] at java.lang.Thread.run(Thread.java:748) [na:1.8.0_261] Caused by: java.net.ConnectException: Connection timed out: connect at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) ~[na:1.8.0_261] at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:81) ~[na:1.8.0_261] at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:476) ~[na:1.8.0_261] at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:218) ~[na:1.8.0_261] at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:200) ~[na:1.8.0_261] at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:162) ~[na:1.8.0_261] at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:394) ~[na:1.8.0_261] at java.net.Socket.connect(Socket.java:606) ~[na:1.8.0_261] at com.rabbitmq.client.impl.SocketFrameHandlerFactory.create(SocketFrameHandlerFactory.java:60) ~[amqp-client-5.3.0.jar:5.3.0] at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:1026) ~[amqp-client-5.3.0.jar:5.3.0] at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:978) ~[amqp-client-5.3.0.jar:5.3.0] at com.rabbitmq.client.ConnectionFactory.newConnection(ConnectionFactory.java:918) ~[amqp-client-5.3.0.jar:5.3.0] at org.springframework.amqp.rabbit.connection.AbstractConnectionFactory.createBareConnection(AbstractConnectionFactory.java:449) ~[spring-rabbit-2.0.3.RELEASE.jar:2.0.3.RELEASE] ... 9 common frames omitted
最新发布
06-25
at java.base/java.net.PlainSocketImpl.socketConnect(PlainSocketImpl.java:101) at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:403) at java.base/java.net....
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