Application Express Listener :: Removal Of Cache Folder Causes Hang With GlassFish
Aug 7, 2012
We had several unexplained lock-ups of APEX in our environment in the last months. This all happened after we moved to GlassFish with the APEX Listener. The symptoms were always that all connections in the JDBC connection pool were in use and we had to restart the GlassFish server instance to free them up.
The culprit is the caching folder that the APEX Listener uses for file caching. We use this to cache image downloads from the database through a procedure, and the caching folder was set to /tmp/apex/cache. I believe this is the default setting. All went well, when the procedure was called the images were downloaded from the database and cached under /tmp/apex/cache. However, for some (as yet unexplained) reason, Linux sometimes removes this folder from the /tmp file system. This seems to happen from time to time after an unknown period of inactivity. We didn't reboot the server. After the folder is gone, the APEX Listener is unable to recreate it, keeps on creating new database connections until the maximum configured is reached, and we need to restart the GlassFish instance to free them up. This also recreates the caching folder.
Our environment: GlassFish 3.1.1+3.1.2, APEX Listener 1.1.3, Oracle Linux 6.2. I didn't try out the new APEX Listener 1.1.4 yet so I'm not sure if this has been fixed in the last version.(kind of reminds me of the problem where the APEX config file is by default placed under /tmp and also disappears from time to time)
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Jul 30, 2013
My configuration is GlassFish 4 (the same thing with Glass Fish 3.2) + win7 + Apex Listener 2.2 (the same thing with Apex Listener 2.1) + Apex 4.2.2 I get blank page when trying to connect to APEX. But after loggin into GlassFish admin page (exactly login with username+password; just open admin page is not enough) in another browser tab I get proper Apex page with all images.
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Aug 5, 2012
I have a system that has issues with sending some emails.
When the email sending process is activated the pages just hang.
Are there any logs or anything like that anywhere that i could look at to try and make sense of it.
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May 16, 2011
what is the reason for filling the folder "Oracle Jar Cache" with some files? Why should we clear the cache ? My clients are also facing same issue. When they use the application continuously(in forms9i) after some time, application getting hanged. When we follow these steps its working fine:
- close all IE
- and clear the cache ,
- then re-start machine
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Feb 15, 2013
I'd like to call an existing function/procedure from a resource template. For example, I have a procedure called 'rest' with an out parameter of 'p_out' - how do I use this within a resource template?
At the moment I have defined the template as type 'PL/SQL Block' and with the 'GET' defined as:
begin
myschema.rest(:p_out);
end;
APEX_PUBLIC_USER has been granted 'all' on the procedure. The p_out is populated with a piece of text.
When I call this resource, I get a '500 Internal Error' returned. I've tried adding p_out as an X-APEX-FORWARD parameter, but nothing seems to work.
Query-based templates seem to work OK.
Using Listener 1.1.3 with Tomcat6.
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Oct 2, 2013
I have an application built in Apex 4.2It's been running fine for several weeksI've not made any changes to the codeSuddenly it developed what seems to be a cache problem.If I enter a search criteria; it displays results. I enter a different search criteria and it brings back the same results as the first criteria.I enter a search criteria in a different field and I still get the results from the first searchI go from Internet Explorer to Mozilla.
DIfferent search criteria, but same issue. Google chrome - same issueThe obvious answer is to clear the cache.I have a process set up that is clear Cache for Items , on submit after computations and validations and then I list all the items individually.This process has been there all along.
I never had this problem before.If I log out and come back in, same issue. What ever I enter as the first search criteria is the results no matter how I search
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Oct 18, 2013
i have created form with table page to enter hotel details there is on 6 check box which are not database column .i have create these check box to keep days details when hotel give service .so i have use
LOV FORP1_MON STATIC2:;1 MONDAYP1_TUE STATIC2:;2 TUESDAYP1_WED STATIC2:;3 WEDNESDAYP1_THR STATIC2:;4 THURSDAYP1_FRI STATIC2:;5 FRIDAYP1_SAT STATIC2:;6 SATURDAYP1_SUN STATIC2:;7 SUNDAY
i have one more column operating days where i have use computaation to keep operating days.
:P1_MON||:P1_TUS||:P1_WED||:P1_THR||:P1_FRI||:P1_SAT||:P1_SUN
these 6 check box are used Source used :Only when curren value in session state is nullSource Type : Static Assignment (Value equals source attibute) Problem are when i create new record then these 6 check box are not clear cache and when i update any record value are not clear cache . i need when i create or update recor then all 6 check box should be null after keep recor.
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Sep 29, 2012
I am using theme 4, topaz. Region_Position_06 is a home link.
I have placed a company graphic at this position on page zero, and when a user clicks it on any page, she exits that page and goes to the home page, a main menu page. So no matter how deep a user may be into the application's pages, she may always click this logo image and return directly to the main menu page.
This is convenient, but there is one problem. Clicking this logo does not clear the cache on the page the user is exiting or, for that matter, on any page in the trail of pages the user took to get to the current page. I navigate primarily with buttons and always clear the cache on a page when I exit it. I need to find a way to do this when a user clicks the logo image.
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Jun 20, 2013
What is the difference between cache fusion and Cache Coherency. Both are same or different functionality.
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Feb 21, 2013
APEX 4.2.1 On a page with dozens of editable page items, when branching back to the same page on-submit, is there a way to clear cache for all items except a few (key) items? The branch attributes (via the f?p= syntax) support clearing cache for the entire page and setting specific item/value pairs but no support for exclusions.
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Jun 29, 2012
We have many many APEX applications in APEX 3.0 running on a 10.2.0.4 database that needs desperately to be upgraded. As a test, I've set up a clean 11gR2 database and copied the production APEX database into it via datapump. I set up APEX Listener, as I don't have any OAS sitting around and the EPG doesn't seem to be supported for APEX 3.0... the Listener doesn't say one way or the other.
When trying to log in, I get the login page, but it tries to reference files such as apex_get_3_1.js while I only have files such as htmldb_get.js in my images directory in production. I noticed it is looking for what appears to be 3.1 files instead of 3.0 files... which concerns me.
The APEX listener appears to be more than just a Java PL/SQL gateway.
Is there a minimum version of APEX the APEX Listener supports?
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Dec 11, 2012
I've just instaledl APEX on Oracle 11g, with APEX listener 1.1, working fine at localhost. But I can't reach it from others computers on LAN. I searched several threads about this and thought I should run
EXEC DBMS_XDB.SETLISTENERLOCALACCESS(FALSE);
But when I execute that, I got the message 'ORA-30952: illegal configuration of HTTP/HTTPS in xdbconfig.xml'.
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Apr 2, 2013
we would like to generate pdf out of apex. as long as we have text (IRR) WITHOUT special characters (öäü), everything is working fine.when we have this characters in a text-columng (IRR), then we get a .pdf with the following content:
javax.xml.transform.TransformerException: com.sun.org.apache.xml.internal.utils.WrappedRuntimeException: An invalid XML character (Unicode: 0x3) was found in the element content of the document.
- we defined in ADMIN in 'report printing' / 'instance-settings': oracle-apex-listener
- we are working with apex-listener 2.0 (integrated in weblogic-server)
- we work with APEX 4.2.1.00.08
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Jun 5, 2012
i m using apex 4.1 and the database is oracle *11g* i want to know how to use the java (servlet,jsp,all technologies of java in apex ) and what i have to do to use the java in apex
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Sep 20, 2012
I am currently hosting a number of APEX applications, using OHS as the webserver and I looking into using the APEX Listener instead. However I have a lot of rewwriterules in my OHS configuration. Is this something that can be configured in the APEX Listener?
<VirtualHost *:80>
ServerAdmin webmaster@dummy-host.example.com
DocumentRoot "${ORACLE_INSTANCE}/config/${COMPONENT_TYPE}/${COMPONENT_NAME}/htdocs"
ServerName application-a.example.com
RewriteEngine On
RewriteRule ^/$ URL....
</VirtualHost>--Andy
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Feb 18, 2013
how to upgrade Oracle apex listener from 1.1.4 to 2.We are using Oracle apex listener with Glassfish 3.1.2.
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Oct 21, 2013
I'm attempting to configure printing via the APEX listener and I'm struggling to understand it. I currently use Oracle HTTP server as the web server for APEX. I have installed the APEX listener and configured it. If I connect via the APEX listener, PDFs work correctly. If I connect via the Oracle HTTP server, I get an error with PDFs. Am I required to connect with the APEX listener for PDF printing? I thought I could configure APEX listener for PDF printing on the backend and still connect via Oracle HTTP server. I'm use APEX 4.2.3, APEX Listener 2.0.5, and Oracle DB 11.1.0.7.
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Jan 15, 2013
Problem is that page is blank and freezed. After another enter in URL page is shown normally.What I find out is that "freeze" happened only in Apex design time ... never in runtime of any of mine app.
Mine conf:
Apex 4.2.1 on
Apex Listener standalone 2.0.0.354.17.06
Oracle 11.2.03 x64
Windows 2008 SE R2 x64
C:UsersDamirV>java -version
java version "1.6.0_34"
Java(TM) SE Runtime Environment (build 1.6.0_34-b04)
Java HotSpot(TM) 64-Bit Server VM (build 20.9-b04, mixed mode)error log:
D:UsersdamirvDesktopApexApex-Misc>set ORACLE_HOME=c:oracleproduct11.2.0dbhome_1
[code].....
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Apr 18, 2013
i am running the following configuration:
Oracle Database 11.2.0.3
Application Express 4.2.1
apex_listener.2.0.1.64.14.25 on Glassfish 3.01
Everything works fine except the restful webservices. In SQL-WorkShop when i create a simple GET webservice and klick on "Test"" 404 not found" comes up in the browser.In the log i can see:
Request Path passes syntax validation
Mapping request to database pool: PoolMap [_poolName=apex, _regex=null, _workspaceIdentifier=null, _failed=false, _lastUpdate=-1, _template=null, _type=REGEX]
Applied database connection info
Attempting to process with PL/SQL Gateway
Not processed as PL/SQL Gateway request
Attempting to process as a RESTful Service
Determining if request can be dispatched as a Tenanted RESTful Service
Request path has one path segment, continuing processing
No Tenant Principal established yet, continuing processing
APEX_LISTENER pool exists, continuing processing
No matching tenant found for: ifc, cannot dispatch
No candidate found for: GET ifc/certification in context: URL....
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Sep 28, 2012
I get an ERR-7621 from Apex whenever I do anything in an application the tries to read a file. For example importing images, css files, themes, or applications. Even the data loader app will get the error if you choose to load a "csv" file. The following appears in my Apex Listener Log (version 2 early adopter). I am running 4.1.1 of Apex and also have another server running the same where the problem does not exist. Following is the log output whenever the load occurs:
Sep 28, 2012 11:21:18 AM com.sun.grizzly.http.servlet.ServletAdapter doService
SEVERE: service exception:
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
[Code].....
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Jan 15, 2013
I use the "Media Resource" RESTful service type to generate custom JSON objects via CLOB-returning functions. This worked great in APEX Listener 1.1.3. However, on APEX Listener 2.0 I get status 500 on a RESTful service which works fine on 1.1.3 (which generates a clob > 4000 bytes), and the following in the server log:
SEVERE: ORA-22922: nonexistent LOB value
oracle.dbtools.common.UnrecoverableException: ORA-22922: nonexistent LOB valueThis seems to be the same issue as reported here:
APEX Listener EA2 Standalone CLOB error
As stated by thoechst in that thread:
>
It is as though the function is getting cast as a varchar2 somewhere. I verified that the function will correctly return a large result to other sources (dbms_output, for instance).
>
Versions:
APEX Listener 2.0
WebLogic 10.3.6 on Windows 2008 SE R2 x64
Oracle DB 11.2.0.3
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Dec 19, 2012
I have, it would appear, successfully installed APEX 4.2 & APEX Listener 2.0 EA (in WebLogic). APEX works fine and it's reverse proxied using mod_weblogic through the OHS. I have configured APEX Printing to be via the APEX Listener.
However, creating a simple report, enabling printing, running the report (e.g. PDF or Word) produces the following few-byte content (only) inside the actual PDF file (obviously not in PDF format):
String index out of range: -1
Furthermore, it throws the exception below on the WebLogic console.
Any experience with the APEX Listener - and if so managed to rectify it?
SEVERE: String index out of range: -1
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
at java.lang.String.substring(String.java:1931)
at oracle.dbtools.apex.hooks.postProcess.FOP2PDF.requestTOPDF(FOP2PDF.java:82)
at oracle.dbtools.apex.hooks.postProcess.FOP2PDF.postProcess(FOP2PDF.java:36)
[Code]...
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Jan 16, 2013
I planing use latest APEX listener and Apache with mod_jk on new server.I wonder what are pros and cons use APEX listener standalone comparing when deployed to J2EE container e.g. Glassfish? URL.....
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May 29, 2013
I installed apex and configure the apex listener at port 80 by mistake couldn't pay attention to use port 8080. The installation is complete but the apex is running at URL.... but the login window is invisible on the page. I can just see the name on the tab "Application Express Login" . When i click on the error message at the bottom of the browser, the message says "apex is undefied" line 35.
When I run the server, I get a message "No free port within range 80. How can I change from port 80 to 8080? how to either un-install the listener or change the port 80 to 8080
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Feb 4, 2013
I want to upload file using restful service This is my code to send file to rest service
MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
FileBody bin = new FileBody(f);
FormBodyPart bodypart = new FormBodyPart("file", bin);
reqEntity.addPart(bodypart);
[code]...
But how can i retrive at server side in restful service using plsql?
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May 9, 2013
I have problems with calling procedure directly from webbrowser. I have a procedure test in test_pkg package. I granted execute on it to anonymous , added it to wwv_flow_epg_include_mod_local function and still have error 404.searched this forum and found this: Does listener use wwv_flow_epg_include_mod_local
So I granted to apex_public_user and created synonym for him to my package. And it starts working. But then I wanted to add next proceudre to my package the same way, and change my test procedure and it stop working again. Now I have 404 error again.
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Feb 25, 2013
I am trying to use the Apex listener 2.0 (instead of HTTP server). I installed and went thru the configuration of the listener, but I must be missing something. When I do the java -jar apex.war to start it up in standalone mode, I get the configuration properties etc., but when I open up my browser and try to bring up APEX with http://localhost:8080/apex/ I get a 500 - Internal Server error with the info below.
***********ERROR*********** init: # headers=43 declare nm owa.vc_arr := ?; vl owa.vc_arr := ?; begin owa.init_cgi_env( ?, nm, vl ); htp.init; htp.HTBUF_LEN := 63; ? := sys_context('USERENV','SID'); end; SID:880 CALL: begin apex; commit; end; BINDS PAGE CALL: declare nlns number := 999999; l_clob CLOB; lines htp.htbuf_arr; l_buff varchar2(32767); l_clob_init boolean:= false; l_file varchar2(5); l_doc_info varchar2(1000); begin OWA.GET_PAGE(lines, nlns); if (nlns > 1) then for i in 1..nlns loop if ( length(lines(i)) > 0 ) then if ( ( lengthb(l_buff) + lengthb(lines(i))) > 32767) then if (NOT l_clob_init) then dbms_lob.createtemporary(l_clob, TRUE); dbms_lob.open(l_clob, dbms_lob.lob_readwrite); l_clob_init:=true; end if; dbms_lob.writeappend(l_clob,length(l_buff),l_buff); l_buff := lines(i); else l_buff := l_buff || lines(i); end if; end if; end loop; end if; if (l_clob_init) then
[code]....
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Nov 29, 2012
We just did an upgrade to 4.2 on a new WebLogic server. We are using the latest Apex Listener as well.The install seemed to go well (no errors during the DBA install) and we configured the Listener to connect to the database using the basic connection settings.I was able to login to the Admin console and create my workspace and users, but I cannot even get the workspace login screen to appear.All we get it is:
Error Error processing request.
ORA-01403: no data found
This is the only thing that shows up when going to the default Apex URL....
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Jan 9, 2013
I'm trying to setup a dev machine to run APEX with RESTful services ahead of using Oracle's Cloud Database. Using Personal Edition, APEX 4.2.1 and the 2.0 Listener is up and running in standalone more. The problem is when hitting 'Test' on a selected REST Resource Handler, it comes up with an APEX 404 not found error, such as on the example HR REST handlers and a new test one setup.
I've followed all of the APEX and Listener instructions, run apex_rest_config.sql, ensured the various users are unlocked and tried both http and https (even though I've added the no SSL flag in the Listener config per standalone instructions.
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Jan 24, 2013
What are the pro's and con's to using the APEX Listener vs the Embedded PL/SQL gateway?
We just started using APEX and on a development server, we set it up using the EPG because this seemed like the easier thing to do. However, they now have a couple apps that are approaching production status and I now need to look at placing the APEX runtime on our production Oracle Database server. So I am trying to decide if I should continue using the EPG or if I should use the APEX Listener.
The server is Windows Server 2008 Enterprise R2 (64 Bit) with Oracle 11g R2 (11.2.0.3.0) also running at 64 bit. I am planning on using APEX 4.2.1.
I have also not found information about how to move APEX application from development to production. Do I export the schema from the dev server and import it to the production server? Do I have to recreate the same workspace name on the production server as well?
use a separate dev and production server setup for APEX?
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