Tomcat 发布web socket时出现Caused by: java.lang.IllegalStateException: No suitable default RequestUpgra

时间 2020-12-27

标签 WebSocket Tomcat部署部署WebSocket异常栏目 Tomcat 繁體版

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WebSocket在Tomcat上部署时出现了 Caused by: java.lang.IllegalStateException: No suitable default RequestUpgradeStrategy found 的异常信息，如图：经过问题排查，Tomcat版本过低（apache-tomcat-7.0.42），于是在官网下载一个最新版本的Tomcat，问题得以解决！选择适用

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1. Caused by: java.lang.IllegalStateException: 启动子级时出
2. Caused by: java.lang.IllegalStateException: Ambiguous mapping found. Cannot
3. 解决：java.lang.ExceptionInInitializerError。Caused by: java.lang.IllegalStateException: SpringJUnit4C
4. Caused by: java.lang.IllegalStateException: Ambiguous mapping found
5. 出现问题Caused by: java.lang.IllegalStateException: Failed to find BuildTools revision 26.1.1
6. Selenium 出现： Caused by: java.lang.ClassNotFoundException: org.w3c.dom.ElementTraversal
7. Caused by: java.lang.IllegalStateException: No registry config found or it's not a valid config!
8. Caused by: java.lang.IllegalStateException: Failed to introspect Class from ClassLoader
9. Caused by: java.lang.IllegalStateException: SpringJUnit4ClassRunner requires JUnit 4.12 or higher.
10. 解决： Caused by: java.lang.IllegalStateException: Cannot load driver class: com.mysql.jdbc.Driver
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1. Caused by: java.lang.IllegalStateException: 启动子级时出
2. Caused by: java.lang.IllegalStateException: Ambiguous mapping found. Cannot
3. 解决：java.lang.ExceptionInInitializerError。Caused by: java.lang.IllegalStateException: SpringJUnit4C
4. Caused by: java.lang.IllegalStateException: Ambiguous mapping found
5. 出现问题Caused by: java.lang.IllegalStateException: Failed to find BuildTools revision 26.1.1
6. Selenium 出现： Caused by: java.lang.ClassNotFoundException: org.w3c.dom.ElementTraversal
7. Caused by: java.lang.IllegalStateException: No registry config found or it's not a valid config!
8. Caused by: java.lang.IllegalStateException: Failed to introspect Class from ClassLoader
9. Caused by: java.lang.IllegalStateException: SpringJUnit4ClassRunner requires JUnit 4.12 or higher.
10. 解决： Caused by: java.lang.IllegalStateException: Cannot load driver class: com.mysql.jdbc.Driver

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