Dear Experts,
I have been using Apache for quite some time now. Some times I get peculiar types of problems that I am often not able to resolve.
I was doing some lab preparation with
Tomcat 5.0.24. it was working fine. but all on a sudden I started getting this error. I tried with another version Tomcat 5.0.28 and also 5.0.12 but all versions keep on giving the same error. I restarted my computer but I still get this error.
I am a demonstartor of a lab and often I face this problem with my Tomcat
servers. are this problems due to some mistake of mine? is there anything that I can do to correct this problem when it happens.
please know that most of the times Tomcats run fine, but about 25% time I get this problem. the error I get is the one below or something similar:
please Help me.
SEVERE: An exception or error occurred in the container during the request proce
ssing
java.lang.NoSuchMethodError: javax.servlet.http.HttpServletRequest.removeAttribu
te(Ljava/lang/String
V
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:278)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(Standard
ContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:16
0)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ssConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java
:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:683)
at java.lang.Thread.run(Thread.java:534)