/pls/portal30/PORTAL30.wwexp_api_engine.action had to be described for execution

Hi,
I am trying to install the URLservices samples on Portal
3.0.9.8.0.
Apache retrieves my test page correctly
(http://myserver/servlets/urlsample) and I can create and
register a portlet provider with Portal...but, I cannot display
any of those portlets.
I am getting a blank page when I try to do so then Portal stops
functionning completely !
Here is my Jserv.log :
[20/11/2001 15:30:18:890 GMT] urlsample/Entering
URLSecurityManager hasAccess(Portlet,ProviderUser)
[20/11/2001 15:30:25:019 GMT] urlsample/Entering
URLSecurityManager hasAccess(Portlet,ProviderUser)
[20/11/2001 15:33:21:693 GMT] Viewer/oracle.discoiv.Disco4iv:
init
[20/11/2001 15:33:21:693 GMT] Viewer/oracle.discoiv.Disco4iv:
Initializing Discoverer 4i Viewer (4.1.37.82)
[20/11/2001 15:33:29:464 GMT] Viewer/oracle.discoiv.Disco4iv:
Initialized Discoverer 4i Viewer (4.1.37.82)
[20/11/2001 15:33:52:637 GMT]
page/oracle.webdb.page.ParallelServlet: init
[20/11/2001 15:33:52:717 GMT] page/JNI: Cache is enabled.
[20/11/2001 15:33:52:807 GMT] page/Starting a pool of 25
handlers.
[20/11/2001 15:34:47:015 GMT] urlsample/init
[20/11/2001 15:34:48:247 GMT] urlsample/Entering init
[20/11/2001 15:34:48:247 GMT] urlsample/Debug Level is : 1
[20/11/2001 15:34:48:257 GMT] urlsample/Entering
URLSecurityManager hasAccess(Portlet,ProviderUser)
[20/11/2001 15:34:56:169 GMT] urlsample/Entering
URLSecurityManager hasAccess(Portlet,ProviderUser)
[20/11/2001 15:35:05:772 GMT] imap/init
[20/11/2001 15:35:12:412 GMT] urlsample/Entering
URLSecurityManager hasAccess(Portlet,ProviderUser)
[20/11/2001 15:35:28:795 GMT] urlsample/Entering
URLSecurityManager hasAccess(Portlet,ProviderUser)
[20/11/2001 15:35:28:826 GMT] urlsample/Entering
URLSecurityManager hasAccess(PortletReference,ProviderUser)
[20/11/2001 15:35:28:826 GMT] urlsample/Entering
URLSecurityManager hasAccess(Portlet,ProviderUser)
[20/11/2001 15:35:28:996 GMT] urlsample/renderBody : Entering
render ********************************
[20/11/2001 15:35:28:996 GMT]
urlsample/URLPageRenderer:renderBody -- getProviderRepositoryPath
() --F:\jpdk_oct2001\pdk\urlservices\providers\urlsample
[20/11/2001 15:35:29:196 GMT] urlsample/getURLStream Inside
[20/11/2001 15:35:30:388 GMT] urlsample/renderBody: Generic
Exception occured in Renderer
java.lang.NullPointerException
     at oracle.portal.provider.v1.http.URLRenderer.renderBody
(URLRenderer.java, Compiled Code)
     at oracle.portal.provider.v1.RenderManager.render
(RenderManager.java:164)
     at
oracle.portal.provider.v1.http.ServletProviderResponse.showPortle
t(ServletProviderResponse.java:528)
     at
oracle.portal.provider.v1.http.HttpProvider.dispatchProviderActio
n(HttpProvider.java:654)
     at oracle.portal.provider.v1.http.HttpProvider.service
(HttpProvider.java:390)
     at javax.servlet.http.HttpServlet.service
(HttpServlet.java:588)
     at org.apache.jserv.JServConnection.processRequest
(JServConnection.java:435)
     at org.apache.jserv.JServConnection.run
(JServConnection.java, Compiled Code)
     at java.lang.Thread.run(Thread.java:479)
[20/11/2001 15:35:30:448 GMT] urlsample/Response status: 500 :
oracle.portal.provider.v1.AccessControlException: renderBody:
Generic Exception occured in Renderer
     at
oracle.portal.provider.v1.ContainerException.fillInStackTrace
(ContainerException.java:58)
     at java.lang.Throwable.<init>(Throwable.java, Compiled
Code)
     at java.lang.Exception.<init>(Exception.java, Compiled
Code)
     at oracle.portal.provider.v1.ContainerException.<init>
(ContainerException.java:19)
Apache also gives me a strange message:
[Tue Nov 20 15:34:45 2001] [warn]
mod_plsql: /pls/portal30/PORTAL30.wwexp_api_engine.action had to
be described for execution. Refer to the PL/SQL GateWay
documentation on how to avoid this
Any idea ?
Thanks in advance.

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Action had to be described for execution

I am getting a strange error message in the apache error log:
[Fri Jul 13 15:45:07 2001] [warn] mod_plsql: /pls/portal30/PORTAL30.wwexp_api_engine.action had to be described for execution. Refer to the PL/SQL GateWay documentation on how to avoid this
Has anyone seen this?

This is all documented in the "Troubleshooting" section. If you are seeing these warnings for Portal, there is nothing much you can do. We will be attempting to address (or reduce) this benign warning in a future version of Portal.
Here is the text for everyone's benefit
B.7 Overhead Problems
While executing some of the Portal stored procedures, mod_plsql is incurring a Describe overhead which results in two extra round trips to the database for a
successful execution. This has performance implications.
B.7.1 The Describe Overhead
In order to execute PL/SQL procedures, mod_plsql needs to know about the data type of the parameters being passed in. Based on this information, mod_plsql
binds each parameter either as an array or as a scalar. One way to know the procedure signature is to describe the procedure before executing it. However, this
approach is not efficient because every procedure has to be described before execution (unless the procedure descriptions are cached).
To avoid the "describe" overhead, mod_plsql looks at the number of parameters passed for each parameter name. It uses this information to assume the datatype of
each variable. The logic is simply, "if there is a single value being passed, then the parameter is a scalar, otherwise it is an array".
This works for most cases but fails if someone tries to pass a single value for an array parameter. Then the PL/SQL procedure execution fails because it binds an
array as a scalar. In such circumstances, mod_plsql issues the Describe call for the procedure and binds each parameter based on the information retrieved from the
describe call, reexecutes the procedure and sends back the results. This happens transparently to the procedure, but internally mod_plsql has encountered two extra
round trips (one for the failed execute and the other for the "Describe" call).
B.7.2 Avoiding the Describe Overhead
You can avoid performance problems by doing the following:
Use Flexible Parameter Passsing.
Always ensure that you pass multiple values for arrays (for single values, you can pass dummy values which will be ignored by your procedure).
Using the following workaround. The workaround defines a two-parameter style procedure which defaults the unused variables.
1.Define a scalar equivalent of your procedure which internally calls the original procedure. For example, if the original package is similar to the following,
create or replace package testpkg as:
TYPE myArrayType is TABLE of VARCHAR2(32767) index by binary_integer;
procedure arrayproc (arr myArrayType);
end testpkg;
2.If you are making URL calls like "/pls/.../testpkg.arrayproc?arr=1", change the specification to be similar to the following:
create or replace package testpkg as
TYPE myArrayType is TABLE of VARCHAR2(32767) index by binary_integer;
procedure arrayproc (arr varchar2);
procedure arrayproc (arr myArrayType);
end testpkg;
3.Create or replace package body testpkg as:
procedure arrayproc (arr varchar2) is
localArr myArrayType;
begin
localArr(1) := arr;
arrayproc (localArr);
end arrayproc;
B.7.3 The Flexible Parameter Passing (four parameter) Overhead
A similar round-trip overhead exists if a PL/SQL procedure is using the older style four parameter interface. The PL/SQL Gateway first tries to execute the
procedure by using the two parameter interface. If this fails, the PL/SQL Gateway tries the four parameter interface. This implies that all four parameter interface
procedures will experience one extra round-trip for execution.
B.7.4 Avoiding the Flexible Parameter Passing Overhead
To avoid this overhead, it is recommended that you write corresponding wrappers which use the two parameter interface and internally call the four parameter
interface procedures. Another option is to change the specification of the original procedure to default the parameters which are not passed in the two parameter
interface.

Logged in as portal30/portal30, no access menu

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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Richard Soule ([email protected]):
Ernest,
Click the login link. Enter portal30 for both username and password.
Rich<HR></BLOCKQUOTE>
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ernest
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/pls/portal30/PORTAL30.wwexp_api_engine.action had to be described for execution

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