RE: JasperLoader Exception
sureI will set up a test caseI will have something up by about noon time or so...and I will post a download of the java source code, JSP file within a ZIP File as well Thanks Paul -Original Message- From: Remy Maucherat [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 31, 2002 5:36 AM To: Tomcat Users List Subject: Re: JasperLoader Exception Thanks for your reply...but could this be the problem that is related to the Jasper ClassLoader Exception error I am getting when first accessing this page. After I refresh the page (this is after the Singleton instance of my object is created), the page loads up without any problems... Could this be related to a Security Manager (or lack of) within the context of this application? And how about sending a test case ? Remy -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
RE: JasperLoader Exception
Wellthere is only one problem thissince I am creating a Singleton object...it exists for all of time. As a resultnobody will see it after the first time the page is ever accessed. I will try to change this, so the object is create every time the page is accesed. Thanks Paul -Original Message- From: Pavel Brun [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 31, 2002 8:12 AM To: Tomcat Users List Subject: RE: JasperLoader Exception sureI will set up a test caseI will have something up by about noon time or so...and I will post a download of the java source code, JSP file within a ZIP File as well Thanks Paul -Original Message- From: Remy Maucherat [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 31, 2002 5:36 AM To: Tomcat Users List Subject: Re: JasperLoader Exception Thanks for your reply...but could this be the problem that is related to the Jasper ClassLoader Exception error I am getting when first accessing this page. After I refresh the page (this is after the Singleton instance of my object is created), the page loads up without any problems... Could this be related to a Security Manager (or lack of) within the context of this application? And how about sending a test case ? Remy -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
RE: JasperLoader Exception
Unfortunately, even changing to an object that is created every time the page is accessed still gives me the same result. I get a NullPointerException in the ClassLoader the first time I access this particular page after starting the Tomcat service, yet on each subsequent access (even after a session times out), the page loads up without any problems (even with a new browser window)... This will forever puzzle me because it is something I can't really prove to you unless I start the service and one of you accesses it for the first time. Any suggestions??? Paul -Original Message- From: Pavel Brun [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 31, 2002 12:13 PM To: Tomcat Users List Subject: RE: JasperLoader Exception Wellthere is only one problem thissince I am creating a Singleton object...it exists for all of time. As a resultnobody will see it after the first time the page is ever accessed. I will try to change this, so the object is create every time the page is accesed. Thanks Paul -Original Message- From: Pavel Brun [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 31, 2002 8:12 AM To: Tomcat Users List Subject: RE: JasperLoader Exception sureI will set up a test caseI will have something up by about noon time or so...and I will post a download of the java source code, JSP file within a ZIP File as well Thanks Paul -Original Message- From: Remy Maucherat [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 31, 2002 5:36 AM To: Tomcat Users List Subject: Re: JasperLoader Exception Thanks for your reply...but could this be the problem that is related to the Jasper ClassLoader Exception error I am getting when first accessing this page. After I refresh the page (this is after the Singleton instance of my object is created), the page loads up without any problems... Could this be related to a Security Manager (or lack of) within the context of this application? And how about sending a test case ? Remy -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Re: JasperLoader Exception
Unfortunately, even changing to an object that is created every time the page is accessed still gives me the same result. I get a NullPointerException in the ClassLoader the first time I access this particular page after starting the Tomcat service, yet on each subsequent access (even after a session times out), the page loads up without any problems (even with a new browser window)... I believe you :) Just send me the JSP, or another JSP which would do the same, so that I can reproduce it ;-) This will forever puzzle me because it is something I can't really prove to you unless I start the service and one of you accesses it for the first time. If I put the JSP on my machine, I'll be able to get it too, right ? Any suggestions??? Nope. The line number indicates that the context class laoder is null, and I don't understand how it can happen. Remy -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
RE: JasperLoader Exception
Hello all, Well...I did have a chance to get up a Website to try to prove my example, but I couldn't with the example I tried to show. It actually is a problem related to creating an object that queries an LDAP server for certain attributes in order to use them later in the application. Does anybody know of any latency issues with regards to LDAP queries and trying to access an object that does this?? Thanks Paul -Original Message- From: Pavel Brun [mailto:[EMAIL PROTECTED]] Sent: Sunday, January 27, 2002 9:48 PM To: Tomcat Users List Subject: RE: JasperLoader Exception Thanks...I will try to get one up as soon as possible. I will let you know when I have something up and running. Thanks Paul -Original Message- From: Remy Maucherat [mailto:[EMAIL PROTECTED]] Sent: Sunday, January 27, 2002 6:29 PM To: Tomcat Users List Subject: Re: JasperLoader Exception Hello all, I am new this this mailing list. I am developing software and am using Java Beans and Tags for this particular application. From time to time, when I first access a particular page, I get a Class Loader exception when loading a class: java.lang.NullPointerException at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:198) at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:132) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313) at org.apache.jsp.settings$jsp._jspService(settings$jsp.java:115) . . I leave out these details because it does not bring any . value. . In this particular case, it crashed when trying to use the pageContext variable name when using: pageContext.getAttribute() method. Does anybody know what the root cause of a Jasper Loader exception is? Is it at all related to insantiating beans or using the jsp:useBean parameter? I have tried looking everywhere, but couldn't find any description or solutions.. Could you post a simple JSP file that would cause the problem ? Remy -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
RE: JasperLoader Exception
We had a similiar problem calling an RMI server from within Tomcat. It turned out that deep down inside some library code there was a call to System.setSecurityManager(...). Hope this helps. Richard -Original Message- From: Pavel Brun [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 31, 2002 9:36 AM To: Tomcat Users List Subject: RE: JasperLoader Exception Hello all, Well...I did have a chance to get up a Website to try to prove my example, but I couldn't with the example I tried to show. It actually is a problem related to creating an object that queries an LDAP server for certain attributes in order to use them later in the application. Does anybody know of any latency issues with regards to LDAP queries and trying to access an object that does this?? Thanks Paul -Original Message- From: Pavel Brun [mailto:[EMAIL PROTECTED]] Sent: Sunday, January 27, 2002 9:48 PM To: Tomcat Users List Subject: RE: JasperLoader Exception Thanks...I will try to get one up as soon as possible. I will let you know when I have something up and running. Thanks Paul -Original Message- From: Remy Maucherat [mailto:[EMAIL PROTECTED]] Sent: Sunday, January 27, 2002 6:29 PM To: Tomcat Users List Subject: Re: JasperLoader Exception Hello all, I am new this this mailing list. I am developing software and am using Java Beans and Tags for this particular application. From time to time, when I first access a particular page, I get a Class Loader exception when loading a class: java.lang.NullPointerException at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:198) at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:132) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313) at org.apache.jsp.settings$jsp._jspService(settings$jsp.java:115) . . I leave out these details because it does not bring any . value. . In this particular case, it crashed when trying to use the pageContext variable name when using: pageContext.getAttribute() method. Does anybody know what the root cause of a Jasper Loader exception is? Is it at all related to insantiating beans or using the jsp:useBean parameter? I have tried looking everywhere, but couldn't find any description or solutions.. Could you post a simple JSP file that would cause the problem ? Remy -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
RE: JasperLoader Exception
thanks.was it within code related to Tomcat? Or your own code that does the calling to an RMI server??? -Original Message- From: Richard Bushell [mailto:[EMAIL PROTECTED]] Sent: Wednesday, January 30, 2002 6:12 PM To: Tomcat Users List Subject: RE: JasperLoader Exception We had a similiar problem calling an RMI server from within Tomcat. It turned out that deep down inside some library code there was a call to System.setSecurityManager(...). Hope this helps. Richard -Original Message- From: Pavel Brun [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 31, 2002 9:36 AM To: Tomcat Users List Subject: RE: JasperLoader Exception Hello all, Well...I did have a chance to get up a Website to try to prove my example, but I couldn't with the example I tried to show. It actually is a problem related to creating an object that queries an LDAP server for certain attributes in order to use them later in the application. Does anybody know of any latency issues with regards to LDAP queries and trying to access an object that does this?? Thanks Paul -Original Message- From: Pavel Brun [mailto:[EMAIL PROTECTED]] Sent: Sunday, January 27, 2002 9:48 PM To: Tomcat Users List Subject: RE: JasperLoader Exception Thanks...I will try to get one up as soon as possible. I will let you know when I have something up and running. Thanks Paul -Original Message- From: Remy Maucherat [mailto:[EMAIL PROTECTED]] Sent: Sunday, January 27, 2002 6:29 PM To: Tomcat Users List Subject: Re: JasperLoader Exception Hello all, I am new this this mailing list. I am developing software and am using Java Beans and Tags for this particular application. From time to time, when I first access a particular page, I get a Class Loader exception when loading a class: java.lang.NullPointerException at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:198) at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:132) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313) at org.apache.jsp.settings$jsp._jspService(settings$jsp.java:115) . . I leave out these details because it does not bring any . value. . In this particular case, it crashed when trying to use the pageContext variable name when using: pageContext.getAttribute() method. Does anybody know what the root cause of a Jasper Loader exception is? Is it at all related to insantiating beans or using the jsp:useBean parameter? I have tried looking everywhere, but couldn't find any description or solutions.. Could you post a simple JSP file that would cause the problem ? Remy -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
RE: JasperLoader Exception
It was in our own code that did some form of naming lookup. From
memory, the Tomcat code did something like:
if ( System.getSecurityManager() != null ) {
classLoader = doSomethingThatReturnsNull()
} else {
classLoader = ...
}
classLoader.doSomething()
-Original Message-
From: Pavel Brun [mailto:[EMAIL PROTECTED]]
Sent: Thursday, January 31, 2002 10:35 AM
To: Tomcat Users List
Subject: RE: JasperLoader Exception
thanks.was it within code related to Tomcat? Or your own code that
does
the calling to an RMI server???
-Original Message-
From: Richard Bushell [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, January 30, 2002 6:12 PM
To: Tomcat Users List
Subject: RE: JasperLoader Exception
We had a similiar problem calling an RMI server from within Tomcat. It
turned out that deep down inside some library code there was a call to
System.setSecurityManager(...).
Hope this helps.
Richard
-Original Message-
From: Pavel Brun [mailto:[EMAIL PROTECTED]]
Sent: Thursday, January 31, 2002 9:36 AM
To: Tomcat Users List
Subject: RE: JasperLoader Exception
Hello all,
Well...I did have a chance to get up a Website to try to prove my
example,
but I couldn't with the example I tried to show.
It actually is a problem related to creating an object that queries an
LDAP server for certain attributes in order to use them later in the
application.
Does anybody know of any latency issues with regards to LDAP queries and
trying
to access an object that does this??
Thanks
Paul
-Original Message-
From: Pavel Brun [mailto:[EMAIL PROTECTED]]
Sent: Sunday, January 27, 2002 9:48 PM
To: Tomcat Users List
Subject: RE: JasperLoader Exception
Thanks...I will try to get one up as soon as possible. I will let you
know
when I have something up and running.
Thanks
Paul
-Original Message-
From: Remy Maucherat [mailto:[EMAIL PROTECTED]]
Sent: Sunday, January 27, 2002 6:29 PM
To: Tomcat Users List
Subject: Re: JasperLoader Exception
Hello all,
I am new this this mailing list. I am developing software and am using
Java Beans and Tags for this particular application. From time to
time,
when I first access a particular page, I get a Class Loader exception
when loading a class:
java.lang.NullPointerException
at
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:198)
at
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:132)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
at org.apache.jsp.settings$jsp._jspService(settings$jsp.java:115)
.
. I leave out these details because it does not bring any
. value.
.
In this particular case, it crashed when trying to use the
pageContext
variable name when using: pageContext.getAttribute() method. Does
anybody
know what the root cause of a Jasper Loader exception is? Is it at all
related to insantiating beans or using the jsp:useBean parameter?
I have tried looking everywhere, but couldn't find any description or
solutions..
Could you post a simple JSP file that would cause the problem ?
Remy
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RE: JasperLoader Exception
On Wed, 30 Jan 2002, Pavel Brun wrote: Date: Wed, 30 Jan 2002 18:34:41 -0500 From: Pavel Brun [EMAIL PROTECTED] Reply-To: Tomcat Users List [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Subject: RE: JasperLoader Exception thanks.was it within code related to Tomcat? Or your own code that does the calling to an RMI server??? Tomcat 4 has zero calls to System.setSecurityManager in it. If you start it with the appropriate command line option (-security), the standard startup scripts add the following system property settings to the command line: -Djava.security.manager -Djava.security.policy==$CATALINA_BASE/conf/catalina.policy which tells the JVM to install a security manager at startup time, using the specified policy file as a replacement for the one in the JDK directory (that's what the '==' does). If you start Tomcat without a security manager, and some code that is executed calls System.setSecurityManager, that is exactly what the JVM does. (Of course, if somebody calls System.exit() it will shut down Tomcat as well :-). Moral of the story - you are advised to bone up on how security managers work in Java, and run Tomcat with the -security option at startup time. You'll need to add any permissions your apps require to the catalina.policy file (the default sandbox is fairly restrictive), but you can avoid some nasty things that bad code (or inadvertently called code) might do to you. Craig McClanahan -Original Message- From: Richard Bushell [mailto:[EMAIL PROTECTED]] Sent: Wednesday, January 30, 2002 6:12 PM To: Tomcat Users List Subject: RE: JasperLoader Exception We had a similiar problem calling an RMI server from within Tomcat. It turned out that deep down inside some library code there was a call to System.setSecurityManager(...). Hope this helps. Richard -Original Message- From: Pavel Brun [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 31, 2002 9:36 AM To: Tomcat Users List Subject: RE: JasperLoader Exception Hello all, Well...I did have a chance to get up a Website to try to prove my example, but I couldn't with the example I tried to show. It actually is a problem related to creating an object that queries an LDAP server for certain attributes in order to use them later in the application. Does anybody know of any latency issues with regards to LDAP queries and trying to access an object that does this?? Thanks Paul -Original Message- From: Pavel Brun [mailto:[EMAIL PROTECTED]] Sent: Sunday, January 27, 2002 9:48 PM To: Tomcat Users List Subject: RE: JasperLoader Exception Thanks...I will try to get one up as soon as possible. I will let you know when I have something up and running. Thanks Paul -Original Message- From: Remy Maucherat [mailto:[EMAIL PROTECTED]] Sent: Sunday, January 27, 2002 6:29 PM To: Tomcat Users List Subject: Re: JasperLoader Exception Hello all, I am new this this mailing list. I am developing software and am using Java Beans and Tags for this particular application. From time to time, when I first access a particular page, I get a Class Loader exception when loading a class: java.lang.NullPointerException at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:198) at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:132) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313) at org.apache.jsp.settings$jsp._jspService(settings$jsp.java:115) . . I leave out these details because it does not bring any . value. . In this particular case, it crashed when trying to use the pageContext variable name when using: pageContext.getAttribute() method. Does anybody know what the root cause of a Jasper Loader exception is? Is it at all related to insantiating beans or using the jsp:useBean parameter? I have tried looking everywhere, but couldn't find any description or solutions.. Could you post a simple JSP file that would cause the problem ? Remy -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
RE: JasperLoader Exception
Thanks for your reply...but could this be the problem that is related to the Jasper ClassLoader Exception error I am getting when first accessing this page. After I refresh the page (this is after the Singleton instance of my object is created), the page loads up without any problems... Could this be related to a Security Manager (or lack of) within the context of this application? Thanks Paul -Original Message- From: Craig R. McClanahan [mailto:[EMAIL PROTECTED]] Sent: Wednesday, January 30, 2002 7:17 PM To: Tomcat Users List Subject: RE: JasperLoader Exception On Wed, 30 Jan 2002, Pavel Brun wrote: Date: Wed, 30 Jan 2002 18:34:41 -0500 From: Pavel Brun [EMAIL PROTECTED] Reply-To: Tomcat Users List [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Subject: RE: JasperLoader Exception thanks.was it within code related to Tomcat? Or your own code that does the calling to an RMI server??? Tomcat 4 has zero calls to System.setSecurityManager in it. If you start it with the appropriate command line option (-security), the standard startup scripts add the following system property settings to the command line: -Djava.security.manager -Djava.security.policy==$CATALINA_BASE/conf/catalina.policy which tells the JVM to install a security manager at startup time, using the specified policy file as a replacement for the one in the JDK directory (that's what the '==' does). If you start Tomcat without a security manager, and some code that is executed calls System.setSecurityManager, that is exactly what the JVM does. (Of course, if somebody calls System.exit() it will shut down Tomcat as well :-). Moral of the story - you are advised to bone up on how security managers work in Java, and run Tomcat with the -security option at startup time. You'll need to add any permissions your apps require to the catalina.policy file (the default sandbox is fairly restrictive), but you can avoid some nasty things that bad code (or inadvertently called code) might do to you. Craig McClanahan -Original Message- From: Richard Bushell [mailto:[EMAIL PROTECTED]] Sent: Wednesday, January 30, 2002 6:12 PM To: Tomcat Users List Subject: RE: JasperLoader Exception We had a similiar problem calling an RMI server from within Tomcat. It turned out that deep down inside some library code there was a call to System.setSecurityManager(...). Hope this helps. Richard -Original Message- From: Pavel Brun [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 31, 2002 9:36 AM To: Tomcat Users List Subject: RE: JasperLoader Exception Hello all, Well...I did have a chance to get up a Website to try to prove my example, but I couldn't with the example I tried to show. It actually is a problem related to creating an object that queries an LDAP server for certain attributes in order to use them later in the application. Does anybody know of any latency issues with regards to LDAP queries and trying to access an object that does this?? Thanks Paul -Original Message- From: Pavel Brun [mailto:[EMAIL PROTECTED]] Sent: Sunday, January 27, 2002 9:48 PM To: Tomcat Users List Subject: RE: JasperLoader Exception Thanks...I will try to get one up as soon as possible. I will let you know when I have something up and running. Thanks Paul -Original Message- From: Remy Maucherat [mailto:[EMAIL PROTECTED]] Sent: Sunday, January 27, 2002 6:29 PM To: Tomcat Users List Subject: Re: JasperLoader Exception Hello all, I am new this this mailing list. I am developing software and am using Java Beans and Tags for this particular application. From time to time, when I first access a particular page, I get a Class Loader exception when loading a class: java.lang.NullPointerException at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:198) at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:132) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313) at org.apache.jsp.settings$jsp._jspService(settings$jsp.java:115) . . I leave out these details because it does not bring any . value. . In this particular case, it crashed when trying to use the pageContext variable name when using: pageContext.getAttribute() method. Does anybody know what the root cause of a Jasper Loader exception is? Is it at all related to insantiating beans or using the jsp:useBean parameter? I have tried looking everywhere, but couldn't find any description or solutions.. Could you post a simple JSP file that would cause the problem ? Remy -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED
Re: JasperLoader Exception
Hello all, I am new this this mailing list. I am developing software and am using Java Beans and Tags for this particular application. From time to time, when I first access a particular page, I get a Class Loader exception when loading a class: java.lang.NullPointerException at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:198) at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:132) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313) at org.apache.jsp.settings$jsp._jspService(settings$jsp.java:115) . . I leave out these details because it does not bring any . value. . In this particular case, it crashed when trying to use the pageContext variable name when using: pageContext.getAttribute() method. Does anybody know what the root cause of a Jasper Loader exception is? Is it at all related to insantiating beans or using the jsp:useBean parameter? I have tried looking everywhere, but couldn't find any description or solutions.. Could you post a simple JSP file that would cause the problem ? Remy -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
