Sun One Webserver 6.0 SP2 to SP6 Migration Problem

we have upgraded our Iplanet 6.0 webserver from Sp2 to Sp6. after this upgradation some times we are getting the below error..

this error occurs only if we try accessing in IE, whereas the same is working fine with Mozilla .

We have degraded to SP2 and now we are able to access the same in IE. can any one pls help me out in this regard

here the stack trace.....

[14/Nov/2005:06:40:59] failure (20956): Internal error: servlet service function had thrown ServletException (uri=/IbsJsps/InterestRate.jsp): javax.servlet.ServletException, stack: javax.servlet.ServletException

at org.apache.jasper.runtime.PageContextImpl.handlePageExceptio n(PageContextImpl.java:453)

at _jsps._IbsJsps._InterestRate_jsp._jspService(_InterestRate_j sp.java:545)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.ja va:119)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at com.iplanet.server.http.servlet.NSServletRunner.invokeServle tService(NSServletRunner.java:919)

at com.iplanet.server.http.servlet.NSServletRunner.Service(NSSe rvletRunner.java:483)

, root cause: java.lang.NullPointerException

at _jsps._IbsJsps._InterestRate_jsp._jspService(_InterestRate_j sp.java:530)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.ja va:119)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at com.iplanet.server.http.servlet.NSServletRunner.invokeServle tService(NSServletRunner.java:919)

at com.iplanet.server.http.servlet.NSServletRunner.Service(NSSe rvletRunner.java:483)

[14/Nov/2005:06:41:02] failure (20956): Internal error: servlet service function had thrown ServletException (uri=/IbsJsps/ExchangeRate.jsp): javax.servlet.ServletException, stack: javax.servlet.ServletException

at org.apache.jasper.runtime.PageContextImpl.handlePageExceptio n(PageContextImpl.java:453)

at _jsps._IbsJsps._ExchangeRate_jsp._jspService(_ExchangeRate_j sp.java:309)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.ja va:119)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at com.iplanet.server.http.servlet.NSServletRunner.invokeServle tService(NSServletRunner.java:919)

at com.iplanet.server.http.servlet.NSServletRunner.Service(NSSe rvletRunner.java:483)

, root cause: java.lang.NullPointerException

at _jsps._IbsJsps._ExchangeRate_jsp._jspService(_ExchangeRate_j sp.java:297)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.ja va:119)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at com.iplanet.server.http.servlet.NSServletRunner.invokeServle tService(NSServletRunner.java:919)

at com.iplanet.server.http.servlet.NSServletRunner.Service(NSSe rvletRunner.java:483)

[2851 byte] By [lax] at [2007-11-26 6:15:05]
# 1
This NPE doesn't depend on application server. This happens when request.getCharacterEncoding() returns null, and then String.getBytes(encoding) throws NPE. Contact support and they will send you a patch fixing the problem.
developer at 2007-7-6 13:53:38 > top of Java-index,Java Enterprise System,Java Enterprise System - Installation, Upgrade and Migration...