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| | | Very strange behavior, please, HELP (GenericServlet problem, error 500) | Very strange behavior, please, HELP (GenericServlet problem, error 500) 2003-06-06 - By Shapira, Yoav
Back
Howdy,
I'm so tired of typing this explanation ;(
Your error is not a ClassNotFoundException. It's a
NoClassDefFoundError. They are different. It happens because you have
multiple copies of servlet.jar in your classpath. One of this copies,
likely the one /usr/java1.2, is old.
Your manipulations of the classpath are wrong and have just worsened
your situation. Wipe out your tomcat installation. Do a clean one.
Don't modify the CLASSPATH in your environment. Don't modify the
CLASSPATH in catalina.sh. Don't add anything to common/lib. Just put
the jars you need in your webapp's WEB-INF/lib directory. Make sure to
NOT put servlet.jar there. You must only have one servlet.jar, the one
that comes with tomcat, throughout your entire tomcat installation.
Yoav Shapira
Millennium ChemInformatics
>-- --Original Message-- --
>From: Pavel Senko [mailto:psenko@(protected)]
>Sent: Thursday, June 05, 2003 3:36 PM
>To: tomcat-user@(protected)
>Subject: Very strange behavior, please, HELP (GenericServlet problem,
error
>500)
>
>Hi All,
>
>I've got Tomcat 4.1.18 + Apache 1.39 (Solaris, Sparc); Tomcat itself
>works OK (shows examples, docs and all stuff).
>
>When I try to execute one servlet, it gives me error 500 (see error
text
>below).
>I've put into CLASSPATH everything *.jar (then restarted Tomcat and
>Apache), copied all the jars into <tomcat>/common/lib but the errors
>still apprears.
>I've also edited catalina.sh and hardcoded CLASSPATH there just to be
>sure Tomcat wouldn't miss it for some mistique reason. Still no
progress.
>
>Here is CLASSPATH:
>/usr/java1.2/jre/lib/exactvm.jar:/usr/java1.2/jre/lib/rt.jar:/usr/java1
.2/l
>ib/dt.jar:/usr/java1.2/jre/lib/ext/javax/servlet:/usr/java1.2/jre/lib/e
xt:/
>usr/java1.2/lib/tools.jar:/usr/java1.2/lib/dt.jar:/usr/java1.2/src.jar:
/met
>rics/tomcat/common/lib/naming-
>resources.jar:/metrics/tomcat/common/lib/naming-
>factory.jar:/metrics/tomcat/common/lib/naming-
>common.jar:/metrics/tomcat/common/lib/mail.jar:/metrics/tomcat/common/l
ib/j
>ta.jar:/metrics/tomcat/common/lib/jndi.jar:/metrics/tomcat/common/lib/j
dbc2
>_0-stdext.jar:/metrics/tomcat/common/lib/jasper-
>runtime.jar:/metrics/tomcat/common/lib/jasper-
>compiler.jar:/metrics/tomcat/common/lib/commons-
>pool.jar:/metrics/tomcat/common/lib/commons-logging-
>api.jar:/metrics/tomcat/common/lib/commons-
>dbcp.jar:/metrics/tomcat/common/lib/commons-
>collections.jar:/metrics/tomcat/common/lib/ant.jar:/metrics/tomcat/comm
on/l
>ib/activation.jar:/metrics/tomcat/common/lib/chart.ext.jar:/metrics/tom
cat/
>common/lib/chart.jar:/usr/java:.:/metrics/tomcat/common/lib/servlet.jar
:/me
>trics/tomcat/common/lib:/metrics/tomcat/common/lib/chartServer.jar
>
>I've seen the similar errors topics where the advice "include tools.jar
>into CLASSPATH" seems to be working.
>I'm kind of new in Servlets, so I don't really know what to dig. Any
>advice will be appreciated.
>
>Thanks,
>Pavel.
>
>here it is, the error:
>
>HTTP Status 500 -
>
>-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---
----
>-- --
>
>type Exception report
>
>message
>
>description The server encountered an internal error () that prevented
>it from fulfilling this request.
>
>exception
>
>javax.servlet.ServletException  : Cannot allocate servlet instance for
>path /servlet/com.objectplanet.chart.ChartServlet
>at java.lang.Throwable (Native Method)
>at java.lang.Throwable (Compiled Code)
>at java.lang.Throwable (Compiled Code)
>at java.lang.Exception (Compiled Code)
>at javax.servlet.ServletException (ServletException.java:132)
>at
>org.apache.catalina.servlets.InvokerServlet (InvokerServlet
.jav
>a:435)
>at
>org.apache.catalina.servlets.InvokerServlet (InvokerServlet.java:1
80)
>at javax.servlet.http.HttpServlet (HttpServlet.java:740)
>at javax.servlet.http.HttpServlet (HttpServlet.java:853)
>at
>org.apache.catalina.core.ApplicationFilterChain (Applic
atio
>nFilterChain.java:247)
>at
>org.apache.catalina.core.ApplicationFilterChain (ApplicationFil
terC
>hain.java:193)
>at
>org.apache.catalina.core.StandardWrapperValve (StandardWrapperVal
ve.j
>ava:260)
>at
>org.apache.catalina.core.StandardPipeline $StandardPipelineValveContext.
invo
>keNext(StandardPipeline.java:643)
>at
>org.apache.catalina.core.StandardPipeline (StandardPipeline.java:
480)
>at
org.apache.catalina.core.ContainerBase (ContainerBase.java:995)
>at
>org.apache.catalina.core.StandardContextValve (StandardContextVal
ve.j
>ava:191)
>at
>org.apache.catalina.core.StandardPipeline $StandardPipelineValveContext.
invo
>keNext(StandardPipeline.java:643)
>at
>org.apache.catalina.core.StandardPipeline (StandardPipeline.java:
480)
>at org.apache.catalina.core.ContainerBase (Compiled Code)
>at org.apache.catalina.core.StandardContext (Compiled Code)
>at
>org.apache.catalina.core.StandardHostValve (StandardHostValve.jav
a:18
>0)
>at
>org.apache.catalina.core.StandardPipeline $StandardPipelineValveContext.
invo
>keNext(StandardPipeline.java:643)
>at
>org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherV
alve
>.java:170)
>at
>org.apache.catalina.core.StandardPipeline $StandardPipelineValveContext.
invo
>keNext(StandardPipeline.java:641)
>at
>org.apache.catalina.valves.ErrorReportValve (ErrorReportValve.jav
a:17
>2)
>at
>org.apache.catalina.core.StandardPipeline $StandardPipelineValveContext.
invo
>keNext(StandardPipeline.java:641)
>at
>org.apache.catalina.core.StandardPipeline (StandardPipeline.java:
480)
>at
org.apache.catalina.core.ContainerBase (ContainerBase.java:995)
>at
>org.apache.catalina.core.StandardEngineValve (StandardEngineValve
.jav
>a:174)
>at
>org.apache.catalina.core.StandardPipeline $StandardPipelineValveContext.
invo
>keNext(StandardPipeline.java:643)
>at
>org.apache.catalina.core.StandardPipeline (StandardPipeline.java:
480)
>at
org.apache.catalina.core.ContainerBase (ContainerBase.java:995)
>at
org.apache.coyote.tomcat4.CoyoteAdapter (CoyoteAdapter.java:223)
>at org.apache.coyote.http11.Http11Processor (Compiled Code)
>at
>org.apache.coyote.http11.Http11Protocol $Http11ConnectionHandler.process
Conn
>ection(Http11Protocol.java:386)
>at org.apache.tomcat.util.net.TcpWorkerThread.runIt(Compiled Code)
>at
>org.apache.tomcat.util.threads.ThreadPool $ControlRunnable.run(Compiled
>Code)
>at java.lang.Thread (Thread.java:479)
>
>
>root cause
>
>java.lang.NoClassDefFoundError : javax/servlet/GenericServlet
>at java.lang.ClassLoader (Native Method)
>at java.lang.ClassLoader (Compiled Code)
>at java.lang.ClassLoader (Compiled Code)
>at java.lang.ClassLoader (Compiled Code)
>at sun.misc.Launcher$AppClassLoader.loadClass(Compiled Code)
>at java.lang.ClassLoader (Compiled Code)
>at org.apache.catalina.loader.WebappClassLoader (Compiled
Code)
>at org.apache.catalina.loader.WebappClassLoader (Compiled
Code)
>at org.apache.catalina.core.StandardWrapper (Compiled Code)
>at org.apache.catalina.core.StandardWrapper (Compiled Code)
>at
>org.apache.catalina.servlets.InvokerServlet (InvokerServlet
.jav
>a:416)
>at
>org.apache.catalina.servlets.InvokerServlet (InvokerServlet.java:1
80)
>at javax.servlet.http.HttpServlet (HttpServlet.java:740)
>at javax.servlet.http.HttpServlet (HttpServlet.java:853)
>at
>org.apache.catalina.core.ApplicationFilterChain (Applic
atio
>nFilterChain.java:247)
>at
>org.apache.catalina.core.ApplicationFilterChain (ApplicationFil
terC
>hain.java:193)
>at
>org.apache.catalina.core.StandardWrapperValve (StandardWrapperVal
ve.j
>ava:260)
>at
>org.apache.catalina.core.StandardPipeline $StandardPipelineValveContext.
invo
>keNext(StandardPipeline.java:643)
>at
>org.apache.catalina.core.StandardPipeline (StandardPipeline.java:
480)
>at
org.apache.catalina.core.ContainerBase (ContainerBase.java:995)
>at
>org.apache.catalina.core.StandardContextValve (StandardContextVal
ve.j
>ava:191)
>at
>org.apache.catalina.core.StandardPipeline $StandardPipelineValveContext.
invo
>keNext(StandardPipeline.java:643)
>at
>org.apache.catalina.core.StandardPipeline (StandardPipeline.java:
480)
>at org.apache.catalina.core.ContainerBase (Compiled Code)
>at org.apache.catalina.core.StandardContext (Compiled Code)
>at
>org.apache.catalina.core.StandardHostValve (StandardHostValve.jav
a:18
>0)
>at
>org.apache.catalina.core.StandardPipeline $StandardPipelineValveContext.
invo
>keNext(StandardPipeline.java:643)
>at
>org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherV
alve
>.java:170)
>at
>org.apache.catalina.core.StandardPipeline $StandardPipelineValveContext.
invo
>keNext(StandardPipeline.java:641)
>at
>org.apache.catalina.valves.ErrorReportValve (ErrorReportValve.jav
a:17
>2)
>at
>org.apache.catalina.core.StandardPipeline $StandardPipelineValveContext.
invo
>keNext(StandardPipeline.java:641)
>at
>org.apache.catalina.core.StandardPipeline (StandardPipeline.java:
480)
>at
org.apache.catalina.core.ContainerBase (ContainerBase.java:995)
>at
>org.apache.catalina.core.StandardEngineValve (StandardEngineValve
.jav
>a:174)
>at
>org.apache.catalina.core.StandardPipeline $StandardPipelineValveContext.
invo
>keNext(StandardPipeline.java:643)
>at
>org.apache.catalina.core.StandardPipeline (StandardPipeline.java:
480)
>at
org.apache.catalina.core.ContainerBase (ContainerBase.java:995)
>at
org.apache.coyote.tomcat4.CoyoteAdapter (CoyoteAdapter.java:223)
>at org.apache.coyote.http11.Http11Processor (Compiled Code)
>at
>org.apache.coyote.http11.Http11Protocol $Http11ConnectionHandler.process
Conn
>ection(Http11Protocol.java:386)
>at org.apache.tomcat.util.net.TcpWorkerThread.runIt(Compiled Code)
>at
>org.apache.tomcat.util.threads.ThreadPool $ControlRunnable.run(Compiled
>Code)
>at java.lang.Thread (Thread.java:479)
>
>
>
>
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