Tomcat common exceptions and solution code examples
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The company project was developed in Java and the middleware was Tomcat. During the operation, some exceptions occurred in Tomcat. The exceptions and solutions are recorded as follows for reference only. (Continuously supplementing...) Anomaly 1: 1. Log content
2. Solution Add the following line to the conf/catalina.properties file in the tomcat installation folder: Exception 2: 1. Log content com.alibaba.druid.stat.DruidStatService]unregister mbean error javax.management.InstanceNotFoundException: com.alibaba.druid:type=DruidStatService at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getMBean(DefaultMBeanServerInterceptor.java:1095) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.exclusiveUnregisterMBean(DefaultMBeanServerInterceptor.java:427) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.unregisterMBean(DefaultMBeanServerInterceptor.java:415) at com.sun.jmx.mbeanserver.JmxMBeanServer.unregisterMBean(JmxMBeanServer.java:546) at com.alibaba.druid.stat.DruidStatService.unregisterMBean(DruidStatService.java:374) at com.alibaba.druid.stat.DruidDataSourceStatManager.removeDataSource(DruidDataSourceStatManager.java:202) at com.alibaba.druid.pool.DruidDataSource$2.run(DruidDataSource.java:1479) at java.security.AccessController.doPrivileged(Native Method) at com.alibaba.druid.pool.DruidDataSource.unregisterMbean(DruidDataSource.java:1475) at com.alibaba.druid.pool.DruidDataSource.close(DruidDataSource.java:1434) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.springframework.beans.factory.support.DisposableBeanAdapter.invokeCustomDestroyMethod(DisposableBeanAdapter.java:354) at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:277) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:578) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:554) at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:972) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:523) at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:979) at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1006) at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:982) at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:934) at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:583) at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:116) at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4900) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5537) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:221) at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1424) at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1413) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) 2. Solution Modify the catalina.sh file in the bin directory of tomcat, and add JAVA_OPTS="-Ddruid.registerToSysProperty=true" between # OS specific support. $var _must_ be set to either true or false. and cygwin=false Exception three: 1. Log content INFO [http-nio-80-exec-16] org.apache.coyote.http11.AbstractHttp11Processor.process Error parsing HTTP request header Note: further occurrences of HTTP header parsing errors will be logged at DEBUG level. java.lang.IllegalArgumentException: Invalid character found in method name. HTTP method names must be tokens at org.apache.coyote.http11.AbstractNioInputBuffer.parseRequestLine(AbstractNioInputBuffer.java:236) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1065) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1539) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1495) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745) 2. Solution Modify the conf/server.xml in the tomcat installation folder. In <Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" maxHttpHeaderSize ="10240" redirectPort="8443" />, the default value of maxHttpHeaderSize is 8*1024. You just need to adjust it to the value you need. The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM. You may also be interested in:
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