Re: interesting java.lang.NullPointerException error when first viewing an index.jsp page - refresh once and page loads correctly
On Friday 10 January 2003 05:49 pm, Brandon Rodak wrote:
Paul,
Here is a link to the Java - http://www.flex-internet.com/java.txt
Thanks again for your help
Brandon Rodak
Web Services
Computer Marketing Corporation
http://www.cmcflex.com http://www.flex-internet.com
Brandon, the scriptlet in your jsp gets your server's cookies from the client:
Cookie[] cookies = request.getCookies();
but on the initial request, there are no cookies set by your server on any
given client, so getCookies() returns null in accordance with the servlet
spec. That triggers a NPE when you try to process the cookies later:
for (int i=0; icookies.length; i++) {
...
}
Put an if statement around your for loop to check if cookies is null or
not and that should fix your problem.
Paul
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Re: interesting java.lang.NullPointerException error when first viewing an index.jsp page - refresh once and page loads correctly
On Friday 10 January 2003 04:15 pm, Brandon Rodak wrote: This may be a rather easy issue but with my limited knowledge of Tomcat - I thought one of you more qualified folks would have a solution. Whenever I visit the initial index.jsp (via index.htm as a workaround) page I get the following server error: java.lang.NullPointerException at org.apache.jsp.index$jsp._jspService(index$jsp.java:75) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) and so on Clicking F5 or Refresh once loads the page - so you can see it is quite a nuisance - we have implemented Apache 1.3.27 with Tomcat 4.0.6 - I have also posted some lines of the catalina log and error logs for review below: It might help if you post some snippets from the JSP. The stack trace for the NPE gives you a clue where in the JSP to look for the culprit and what snippet to post. Paul -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: interesting java.lang.NullPointerException error when first viewing an index.jsp page - refresh once and page loads correctly
Paul, You can view the source of the page at http://www.flex-internet.com/source.txt and the full error and stack trace (?) at http://www.flex-internet.com/error.txt Thanks for the help, Brandon Rodak Web Services Computer Marketing Corporation http://www.cmcflex.com http://www.flex-internet.com -Original Message- From: Paul Yunusov [mailto:[EMAIL PROTECTED]] Sent: Friday, January 10, 2003 2:19 PM To: Tomcat Users List Subject: Re: interesting java.lang.NullPointerException error when first viewing an index.jsp page - refresh once and page loads correctly On Friday 10 January 2003 04:15 pm, Brandon Rodak wrote: This may be a rather easy issue but with my limited knowledge of Tomcat - I thought one of you more qualified folks would have a solution. Whenever I visit the initial index.jsp (via index.htm as a workaround) page I get the following server error: java.lang.NullPointerException at org.apache.jsp.index$jsp._jspService(index$jsp.java:75) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) and so on Clicking F5 or Refresh once loads the page - so you can see it is quite a nuisance - we have implemented Apache 1.3.27 with Tomcat 4.0.6 - I have also posted some lines of the catalina log and error logs for review below: It might help if you post some snippets from the JSP. The stack trace for the NPE gives you a clue where in the JSP to look for the culprit and what snippet to post. Paul -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: interesting java.lang.NullPointerException error when first viewing an index.jsp page - refresh once and page loads correctly
On Friday 10 January 2003 04:40 pm, Brandon Rodak wrote: Paul, You can view the source of the page at http://www.flex-internet.com/source.txt and the full error and stack trace (?) at http://www.flex-internet.com/error.txt Thanks for the help, Brandon Rodak Web Services Computer Marketing Corporation http://www.cmcflex.com http://www.flex-internet.com Brandon, I meant you could look at index$jsp.java (line 75) mentioned in the NPE stacktrace to look for clues. It's in your Tomcat's work directory hierarchy. Can you post it too? I am almost certain the problem is in that scriptlet at the top of the page but without looking at the generated servlet's line 75, I can't tell which null reference causes the NPE. The elders were right to caution against scriptlets after all. Paul -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: interesting java.lang.NullPointerException error when first viewing an index.jsp page - refresh once and page loads correctly
Paul, Here is a link to the Java - http://www.flex-internet.com/java.txt Thanks again for your help Brandon Rodak Web Services Computer Marketing Corporation http://www.cmcflex.com http://www.flex-internet.com -Original Message- From: Pulat Yunusov [mailto:[EMAIL PROTECTED]] Sent: Friday, January 10, 2003 3:13 PM To: Tomcat Users List Subject: Re: interesting java.lang.NullPointerException error when first viewing an index.jsp page - refresh once and page loads correctly On Friday 10 January 2003 04:40 pm, Brandon Rodak wrote: Paul, You can view the source of the page at http://www.flex-internet.com/source.txt and the full error and stack trace (?) at http://www.flex-internet.com/error.txt Thanks for the help, Brandon Rodak Web Services Computer Marketing Corporation http://www.cmcflex.com http://www.flex-internet.com Brandon, I meant you could look at index$jsp.java (line 75) mentioned in the NPE stacktrace to look for clues. It's in your Tomcat's work directory hierarchy. Can you post it too? I am almost certain the problem is in that scriptlet at the top of the page but without looking at the generated servlet's line 75, I can't tell which null reference causes the NPE. The elders were right to caution against scriptlets after all. Paul -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
