Java Applet in a HTML page: failing with PLS-00306: wrong number of args

We are trying to use a Java Applet in a HTML page. as our system needs to be able to retrieve a predefined set of data from a third party system that uses Dynamic Data Exchange Protocol (DDE) and are encountering errors from APEX and in IE itself.
We are using JavaDde from www.nevaobject.com that enables our Java applet to interact with Windows applications (Third Party System) using DDE.
This functionality is currently used in our Web Form 6i application and we are trying to use the same in the new ApEx application.
We are using ApEx version : 2.1 and actually aer encountering 2 problems:
Problem 1: ApEx failing with PLS-00306: wrong number or types of arguments in call to 'ACCEPT'
Problem 2: IE crashes if Applet used in a complex page with several regions (1 Context, 4 Report Regions, 2 level Tabs, Links)
This problem does not occur in the page where there is only applet and one region. In the case of complex page the IE crashes if the page is reloaded
Test scenario:
1- Create a simple page with the HTML region.
2- Define the Source of the above region as follows
<OBJECT CLASSID="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
CODEBASE="http://java.sun.com/products/plugin/autodl/jinstall-1_4-windows-i586.cab#version=1,4,0,0"
WIDTH="1"
HEIGHT="1"
ID="simpleApplet"
NAME="simpleApplet">
<PARAM NAME="code" VALUE="simpleApplet.class" >
<PARAM NAME="archive" VALUE="simpleApplet.jar" />
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.4">
</OBJECT>
3- Create a simple Java applet "simpleApplet" - for the test its enough if the applet will have just the init method printing out the mesage to the console
4- Create a Submit Button (not redirect) in Region Header and create unconditional (do not set When Button Pressed property) Page Branch to navigate to another page (the page without the applet)
6- Run the page and Submit -
The error below is returned by the engine:
In our case our applet is called ddeApplet - I do not know why is ApEx passing the Applet's ID down to the wwv_flow.accept method as a parameter
Tue, 24 Jul 2007 08:15:39 GMT
ORA-06550: line 7, column 2:
PLS-00306: wrong number or types of arguments in call to 'ACCEPT'
ORA-06550: line 7, column 2:
PL/SQL: Statement ignored
DAD name: rbdev2_ax
PROCEDURE : wwv_flow.accept
URL : http://castor:7778/pls/rbdev2_ax/wwv_flow.accept
PARAMETERS :
============
P_FLOW_ID:
147
P_FLOW_STEP_ID:
500
P_INSTANCE:
6986070096861669560
P_PAGE_SUBMISSION_ID:
1005758
P_REQUEST:
CRASH
P_ARG_NAMES:
100380029717786501
P_T01:
147
P_T02:
101
P_T03:
5000044
P_T04:
1
P_T05:
S
DDEAPPLET:
Ddeapplet[panel0,0,0,1x1,layout=java.awt.BorderLayout,rootPane=javax.swing.JRootPane[,0,0,1x1,layout=javax.swing.JRootPane$RootLayout,alignmentX=null,alignmentY=null,border=,flags=385,maximumSize=,minimumSize=,preferredSize=],rootPaneCheckingEnabled=true]
P_MD5_CHECKSUM:
ENVIRONMENT:
============
PLSQL_GATEWAY=WebDb
GATEWAY_IVERSION=2
SERVER_SOFTWARE=Oracle HTTP Server Powered by Apache/1.3.19 (Unix) mod_fastcgi/2.2.10 mod_perl/1.25 mod_oprocmgr/1.0
GATEWAY_INTERFACE=CGI/1.1
SERVER_PORT=7778
SERVER_NAME=castor
REQUEST_METHOD=POST
QUERY_STRING=
PATH_INFO=/pls/rbdev2_ax/wwv_flow.accept
SCRIPT_NAME=/pls
REMOTE_HOST=
REMOTE_ADDR=192.168.66.169
SERVER_PROTOCOL=HTTP/1.1
REQUEST_PROTOCOL=HTTP
REMOTE_USER=
HTTP_CONTENT_LENGTH=661
HTTP_CONTENT_TYPE=application/x-www-form-urlencoded
HTTP_USER_AGENT=Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
HTTP_HOST=castor:7778
HTTP_ACCEPT=image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/vnd.ms-powerpoint, application/vnd.ms-excel, application/msword, application/x-shockwave-flash, */*
HTTP_ACCEPT_ENCODING=gzip, deflate
HTTP_ACCEPT_LANGUAGE=en-us
HTTP_ACCEPT_CHARSET=
HTTP_COOKIE=ISCOOKIE=true; LOGIN_USERNAME_COOKIE=rdanko; ORACLE_PLATFORM_REMEMBER_UN=RDANKO:ngrb; WWV_FLOW_USER2=70FBB00945FE46B9; V6_AUTHENTICATION_COOKIE=70FBB00945FE46B9
Authorization=
HTTP_IF_MODIFIED_SINCE=
HTTP_REFERER=http://castor:7778/pls/rbdev2_ax/f?p=147:500:6986070096861669560:::::
HTTP_SOAPACTION=

"theArrow",
It looks like whatever HTML you're including on your page is creating HTML input form elements inside the HTML form "wwv_flow". This form is posted to wwv_flow.accept, and of course, the PL/SQL procedure wwv_flow.accept doesn't know anything these additional arguments/form elements you're attempting to POST.
Joel

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When I run this statement it fails with
SQL> @test_clob_insert.sql
:data1:='WAVEHDR^Add^200812310374^2012-08-19 15:53:22.0^
ERROR at line 2:
ORA-06550: line 2, column 10:
PLS-00172: string literal too long
As per my understanding a bind variable can store maximum value of clob. Not sure why this is throwing this error. Please help
Regards
This column is stored in_row.
SQL> r
1* select owner,table_name,column_name,in_row from dba_lobs where table_name='CL_MESSAGE1'
OWNER TABLE_NAME COLUMN_NAME IN_
VEERA CL_MESSAGE1 DATA YES
Edited by: 953621 on Aug 19, 2012 10:34 PM
Edited by: 953621 on Aug 19, 2012 11:44 PM

953621 wrote:
As per my understanding a bind variable can store maximum value of clob. Not sure why this is throwing this error. Please helpYes, if the bind variable is declared as a clob, then it can store the maximum size of the clob, but that's not your issue.
Your issue is that you are setting the clob data using a string literal i.e. a single string between quotes. There is a limit to the size of string literals, so you would have to build up the clob by appending many string literals together instead.

Pages failing with Java Heap errors

We are running CF 8,0,0,176276 on a Windows 32 bit 2003
server, with IIS 6 and Java Runtime version 6 ( it's really version
1.06).
We started getting the java heap error messages two weeks
ago. Now we are also getting the 'GC overhead limit exceeded'
error, which is concerned with the Java garbage collection. I tried
to change the JVM heap size from 1GB to 2GB, but CF wouldn't start
up. I've since found out that Windows 32bit servers can't use 2GB
for Java.
One java article I found said to turn off the Java garbage
collection using -XX:-UseGCOverheadLimit (
http://forums.java.net/jive/message.jspa?messageID=228596).
It seems like turning off the garbage collection would be the
opposite of what I am trying to do. Are there any thoughts about
this?
Are there any hotfixes for CF8? and where are they located?
Scott

Scott, the error is a symptom, not the cause of your
problems. Turning off that option won't "solve" the problem, which
is that you're running out of memory. More on that option in a
moment.
Let's talk first about your observation of trying to change
the max memory from 1 to 2 gig. Since you're on Windows (32 bit),
as you say, you can't use more than 2g per process (it's not really
a Java limit, but rather a Windows one).
But as you found, you can't set CF to 2g because the JVM
won't start. Again, this is not a CF-specific issue. You can see
discussions of the same problem with plain old Java apps, as at
http://forums.java.net/jive/message.jspa?messageID=228596.
So, similar to what they say, the consensus seems to be that
you can set it to somewhere between1.3 and 1.7 gb, before the JVM
won't start. You have to try different values for yourself.
Now, that extra few hundred meg may be all you need to get
past your problem, but really that's often just forestalling the
inevitable. You need to find why CF is using so much memory. You
say you're using CF8 but don't say if it's Enterprise or Standard.
If the former, then you have the CF8 Server Monitor (accessible in
the CF Admin, and discussed in a multipart series I wrote for the
Adobe Dev Center, as discussed at
http://carehart.org/blog/client/index.cfm/2008/7/30/45page_server_monitor_guide).
That, as well as tools like FusionReactor and SeeFusion, can help
you to better see how CF is using memory.
All three offer a graphical interface to show how memory use
is trending. You may see if it grows steadily throughout the day,
or grows in spikes. People tend to say "I have a memory leak", when
in fact it may be just that they have either a few requests that
use too much memory (so you'll see a stair stepping rise in memory
use concurrent with their execution), or it may be that they're
sticking stuff into shared scopes (session, application, or server)
and those are living well beyond the live of each request.
The CF8 Server Monitor even has a memory tracking feature,
but it has to be used carefully. If you enable it, you may find it
brings your server to its knees.I'll do a blog entry soon on how to
use it most effectively (something I learned since writing the
articles last year).
One thing that the monitor can tell you, without any of the
"start" buttons enabled at the top of the monitor, is how many
sessions you have. That may be very enlightening. You may have
thousands of them, and not realize it, because of bots, spiders,
and other crap requests. See the "active sessions" page of the
Server Monitor, and its graph icon in particular (discussed in more
detail in one of my articles).
Sadly, neither FusionReactor nor SeeFusion can tell you how
many sessions are currently running, so if you're on CF8 Standard
(or if others reading this are on 6 or 7, where they can use FR or
SF), you can't easily see how many sessions there are. (There are
undocumented, unsupported methods, such as discussed at
http://rewindlife.com/2003/09/08/undocumented-application-scope-functions/.
Just be aware some techniques work differently depending on whether
J2EE sessions are enabled in th CF admin.)
Finally, about your observation of the usegcoverheadlimit
option, and the recommendation to turn it off: the article you
point to doesn't say doing so would disable GC. I'm curious how you
may have concluded that.But digging into things more, I see that
disabling it (using the - before it) will turn off a feature
(introduced in 6) which limits the proportion of the VM's time that
is spent in GC before an OutOfMemory error is thrown. That's the
error you're seeing, that the JVM has detected too much time is
being spent in doing GC.
So turning off the option doesn't "turn off the Java garbage
collection". It just changes whether an OOM error will be thrown
even before being really out of memory, simply because too much
time is being spent in GC.
And even then, how this option works (if enabled, which it is
by default) changes depending on whether you're using a parrallel
or concurrent collector (as discussed in two places in
http://java.sun.com/javase/technologies/hotspot/gc/gc_tuning_6.html,
if you search for that switch).
Hope some of that helps.

Java Applet in a HTML page: failing with PLS-00306: wrong number of args

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