HTTP状态500 - 实例化servlet类src.ups.BookslotServlet时出错 [英] HTTP Status 500 - Error instantiating servlet class src.ups.BookslotServlet
问题描述
ype异常报告
消息实例化servlet类src.ups.BookslotServlet时出错
描述服务器遇到内部错误，导致无法完成此请求。
例外
javax.servlet。 ServletException：实例化servlet类src.ups.BookslotServlet时出错
org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:502）
org.apache.catalina .valves.ErrorReportValve.invoke（ErrorReportValve.java:79）
org.apache.catalina.valves.AbstractAccessLogValve.invoke（AbstractAccessLogValve.java:617）
org.apache .catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:518）
org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1091)
org .apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:668）
org.apache.tomc at.util.net.NioEndpoint $ SocketProcessor.doRun（NioEndpoint.java:1521）
org.apache.tomcat.util.net.NioEndpoint $ SocketProcessor.run（NioEndpoint.java:1478）
java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1142）
java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:617)< $>
org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run（TaskThread.java:61）
java.lang.Thread.run（Thread.java:745）
根本原因
java.lang.ClassNotFoundException：src.ups.BookslotServlet
org.apache.catalina .loader.WebappClassLoaderBase.loadClass（WebappClassLoaderBase.java:1305）
org.apache.catalina.loader.WebappClassLoaderBase.loadClass（WebappClassLoaderBase.java:1157)
org.apache .catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:502)
org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:79)
org.apache.catalina.valves.AbstractAccessLogValve.invoke（AbstractAccessLogValve.java:617）
org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:518）
org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1091)
org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:668）
org.apache.tomcat.util.net.NioEndpoint $ SocketProcessor.doRun（NioEndpoint.java:1521）
org.apache.tomcat.util.net.NioEndpoint $ SocketProcessor.run （NioEndpoint.java:1478）
java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1142）
java.util.concurrent.ThreadPoolExecutor $ Worker.run （ThreadPoolExecutor.java:617）
org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run（TaskThread.java:61）
java.lang.Thread .run（Thread.java:745）
注意Apache Tomcat中提供了根本原因的完整堆栈跟踪/8.0.22 logs。
Apache Tomcat / 8.0.22
ype Exception report
message Error instantiating servlet class src.ups.BookslotServlet
description The server encountered an internal error that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Error instantiating servlet class src.ups.BookslotServlet
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:617)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1521)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1478)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)
root cause
java.lang.ClassNotFoundException: src.ups.BookslotServlet
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1305)
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:617)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1521)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1478)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)
note The full stack trace of the root cause is available in the Apache Tomcat/8.0.22 logs.
Apache Tomcat/8.0.22
推荐答案
AbstractConnectionHandler.process（AbstractProtocol .java：668）
org.apache.tomcat.util.net.NioEndpoint
AbstractConnectionHandler.process(AbstractProtocol.java:668)
org.apache.tomcat.util.net.NioEndpoint
SocketProcessor.doRun（NioEndpoint.java:1521）
org.apache.tomcat.util.net.NioEndpoint
SocketProcessor.doRun(NioEndpoint.java:1521)
org.apache.tomcat.util.net.NioEndpoint
SocketProcessor.run（NioEndpoint.java:1478）
java.util.concurrent.ThreadPoolExecutor .runWorker（ThreadPoolExecutor.java:1142）
java.util.concurrent.ThreadPoolExecutor
SocketProcessor.run(NioEndpoint.java:1478)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor
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