Comments on: Running JasperReports with subreports in an app server environment http://curiouscreature.net/blog/2008/07/29/running-jasperreports-with-subreports-in-an-app-server-environment/ because the world is an interesting place... Fri, 13 Aug 2010 12:32:23 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: ccnet http://curiouscreature.net/blog/2008/07/29/running-jasperreports-with-subreports-in-an-app-server-environment/comment-page-1/#comment-674 ccnet Sat, 29 Aug 2009 02:48:19 +0000 http://brainfreezeblog.com/?p=99#comment-674 The best resource would be the JasperSoft support forums. The javaflow version of the jasper jar is the one that should be used in a multithreaded environment like an application server. Whether the library will only create a single thread...I can't answer that. It would seem from your comment that it is in fact doing this. I haven't dug into it that as the javaflow version of the library solved the problems we were having. The best resource would be the JasperSoft support forums. The javaflow version of the jasper jar is the one that should be used in a multithreaded environment like an application server. Whether the library will only create a single thread…I can’t answer that. It would seem from your comment that it is in fact doing this. I haven’t dug into it that as the javaflow version of the library solved the problems we were having.

]]> By: Raja http://curiouscreature.net/blog/2008/07/29/running-jasperreports-with-subreports-in-an-app-server-environment/comment-page-1/#comment-673 Raja Tue, 11 Aug 2009 19:30:20 +0000 http://brainfreezeblog.com/?p=99#comment-673 I have used the suggestion mentioned in this website and jasper is not creating multithreads per report (specifically for subreports). I have the following question: Using the approach mentioned in this website, the jasper report will only create single thread per report instead of creating multiple threads. Is my assumption correct? I have used the suggestion mentioned in this website and jasper is not creating multithreads per report (specifically for subreports). I have the following question:
Using the approach mentioned in this website, the jasper report will only create single thread per report instead of creating multiple threads. Is my assumption correct?

]]> By: Darryl http://curiouscreature.net/blog/2008/07/29/running-jasperreports-with-subreports-in-an-app-server-environment/comment-page-1/#comment-628 Darryl Mon, 20 Apr 2009 16:13:45 +0000 http://brainfreezeblog.com/?p=99#comment-628 Just a note for anybody who finds this article searching for JasperReports hanging or something of that nature. I had a problem with my appserver hanging after every 8th invocation of a report. This constant was obviously a clue and no coincidence with the fact that I only had 8 connections in my DB connection pool. Call me stupid, but it wasn't obvious to me from the JR sample code etc that I needed to explicitly close the connection I gave to the JasperFillManager. Once I did that I was on my way again. So just check and make sure that any connections you're pulling from a DataSource, you're also closing. JR is not closing the connection for you (in hindsight, this is somewhat obvious cos it shouldn't be if I want to continue using that connection for something else). Just a note for anybody who finds this article searching for JasperReports hanging or something of that nature. I had a problem with my appserver hanging after every 8th invocation of a report. This constant was obviously a clue and no coincidence with the fact that I only had 8 connections in my DB connection pool.

Call me stupid, but it wasn’t obvious to me from the JR sample code etc that I needed to explicitly close the connection I gave to the JasperFillManager. Once I did that I was on my way again. So just check and make sure that any connections you’re pulling from a DataSource, you’re also closing. JR is not closing the connection for you (in hindsight, this is somewhat obvious cos it shouldn’t be if I want to continue using that connection for something else).

]]> By: Chigozie Damian http://curiouscreature.net/blog/2008/07/29/running-jasperreports-with-subreports-in-an-app-server-environment/comment-page-1/#comment-153 Chigozie Damian Sun, 19 Oct 2008 21:10:05 +0000 http://brainfreezeblog.com/?p=99#comment-153 Hi all, I actually had the same issues using JRThreadSubreportRunnerFactory resulting in my system freezing and an exception which is java.lang.ThreadDeath thrown by the app server (Sun Java System App Server 9.1)until I now reconfigured the SubreportRunnerFactory in the properties file to JRContinuationSubreportRunnerFactory and equally added the commons-javaflow-20060411.jar that came with the iReport-2.0.1 release. Now the subreports are working but I have peculiar case of a complex report which requires four different subreports in a master report. Now out of those four subreports, one of the subreports contains nested three subreports. To make it more analytical and descriptive, I have a master report which contains four subreports namely : a) subreport_1.jasper b) subreport_2.jasper c) subreport_3.jasper d) subreport_4.jasper Out of these four subreports, subreport_4.jasper contains another three subreports inside it. On running subreport_4.jasper with its nested subreports seperately, everything runs fine. Also on running subreports 1 to 3 with the master report, everything runs fine too. But when I eventually merge all the subreports together within the master reports, my system chokes or hangs and the app server throws java.lang.OutOfMemoryError. Can anyone help, I've been on this issue for close to a week running... Hi all,

I actually had the same issues using JRThreadSubreportRunnerFactory resulting in my system freezing and an exception which is java.lang.ThreadDeath thrown by the app server (Sun Java System App Server 9.1)until I now reconfigured the SubreportRunnerFactory in the properties file to JRContinuationSubreportRunnerFactory and equally added the commons-javaflow-20060411.jar that came with the iReport-2.0.1 release. Now the subreports are working but I have peculiar case of a complex report which requires four different subreports in a master report. Now out of those four subreports, one of the subreports contains nested three subreports.

To make it more analytical and descriptive, I have a master report which contains four subreports namely :

a) subreport_1.jasper
b) subreport_2.jasper
c) subreport_3.jasper
d) subreport_4.jasper

Out of these four subreports, subreport_4.jasper contains another three subreports inside it. On running subreport_4.jasper with its nested subreports seperately, everything runs fine. Also on running subreports 1 to 3 with the master report, everything runs fine too. But when I eventually merge all the subreports together within the master reports, my system chokes or hangs and the app server throws java.lang.OutOfMemoryError.

Can anyone help, I’ve been on this issue for close to a week running…

]]> By: Chris Palmer http://curiouscreature.net/blog/2008/07/29/running-jasperreports-with-subreports-in-an-app-server-environment/comment-page-1/#comment-146 Chris Palmer Thu, 14 Aug 2008 03:16:11 +0000 http://brainfreezeblog.com/?p=99#comment-146 I got it working just fine. The problem was the naming of the tomcat directory and the code in the controller was encoding the name... its working thanks I got it working just fine. The problem was the naming of the tomcat directory and the code in the controller was encoding the name… its working thanks

]]> By: Chris Palmer http://curiouscreature.net/blog/2008/07/29/running-jasperreports-with-subreports-in-an-app-server-environment/comment-page-1/#comment-148 Chris Palmer Thu, 14 Aug 2008 01:43:01 +0000 http://brainfreezeblog.com/?p=99#comment-148 I did a test and it still doesn't find it. The original code does have an absolute file reference and it still can't . The error is actually could not load object from location ./MY.jasper I did a test and it still doesn’t find it. The original code does have an absolute file reference and it still can’t .

The error is actually could not load object from location ./MY.jasper

]]> By: Chris Palmer http://curiouscreature.net/blog/2008/07/29/running-jasperreports-with-subreports-in-an-app-server-environment/comment-page-1/#comment-147 Chris Palmer Wed, 13 Aug 2008 23:59:27 +0000 http://brainfreezeblog.com/?p=99#comment-147 thanks for the follow up. The application is deployed to tomcat. I am testing your suggestion right now thanks for the follow up. The application is deployed to tomcat. I am testing your suggestion right now

]]> By: ccnet http://curiouscreature.net/blog/2008/07/29/running-jasperreports-with-subreports-in-an-app-server-environment/comment-page-1/#comment-150 ccnet Wed, 13 Aug 2008 12:39:02 +0000 http://brainfreezeblog.com/?p=99#comment-150 Chris- Not sure this is the answer to your problem. You might want to try setting the path in your main report when you set the subreport properties. For instance: "./sub_report.jasper". That will ensure it will look in the same directory. Also, I believe it depends on which compiler you're using. If you're using the JDK then it will not use the same classpath as JDK your application is running on. This is different if you are running on the Eclipse JDT (which I think is the default). In the case of the JDK you might need to set the property net.sf.jasperreports.compiler.classpath and include the folder where you're storing the compiled reports. In the case of the Eclipse compiler it *will* "inherit" the classpath of the app server JDK. The Jasper guide says "This property is not used by the JDT-based report compiler, which simply uses the parent application’s classpath during Java source file compilation." Chris-

Not sure this is the answer to your problem. You might want to try setting the path in your main report when you set the subreport properties. For instance: “./sub_report.jasper”. That will ensure it will look in the same directory.

Also, I believe it depends on which compiler you’re using. If you’re using the JDK then it will not use the same classpath as JDK your application is running on. This is different if you are running on the Eclipse JDT (which I think is the default). In the case of the JDK you might need to set the property net.sf.jasperreports.compiler.classpath and include the folder where you’re storing the compiled reports. In the case of the Eclipse compiler it *will* “inherit” the classpath of the app server JDK. The Jasper guide says “This property is not used by the JDT-based report compiler, which simply uses the parent
application’s classpath during Java source file compilation.”

]]> By: Chris Palmer http://curiouscreature.net/blog/2008/07/29/running-jasperreports-with-subreports-in-an-app-server-environment/comment-page-1/#comment-149 Chris Palmer Wed, 13 Aug 2008 09:32:40 +0000 http://brainfreezeblog.com/?p=99#comment-149 Hi ! This was a good find. I think. The problem I was hitting today is that it couldn't locate the subreports when they were there. All works fine in the designer however once deployed to the server it pukes. I removed the sub report and the report ran fine. I am going to assume it is this issue and give it a try at work tomorrow. The actual exception was unable to locate sub report "XXX" . Hi !

This was a good find. I think. The problem I was hitting today is that it couldn’t locate the subreports when they were there. All works fine in the designer however once deployed to the server it pukes. I removed the sub report and the report ran fine. I am going to assume it is this issue and give it a try at work tomorrow. The actual exception was unable to locate sub report “XXX” .

]]> By: Teodor Danciu http://curiouscreature.net/blog/2008/07/29/running-jasperreports-with-subreports-in-an-app-server-environment/comment-page-1/#comment-152 Teodor Danciu Fri, 08 Aug 2008 15:09:03 +0000 http://brainfreezeblog.com/?p=99#comment-152 Hi, We have modified the default properties file of the Javaflow-based JAR so that the subreport runner using Java continuations is the default, as suggested at the above point #1. Things like these can be solved quicker if they are posted as feature requests or even bugs on the JasperReports trackers. We have not yet complied with points #2 and #3 which talk about removing some of the subreport runner implementations from the respective JAR distributions, because we think these are less important. Thank you, Teodor Hi,

We have modified the default properties file of the Javaflow-based JAR so that the subreport runner using Java continuations is the default, as suggested at the above point #1.
Things like these can be solved quicker if they are posted as feature requests or even bugs on the JasperReports trackers.

We have not yet complied with points #2 and #3 which talk about removing some of the subreport runner implementations from the respective JAR distributions, because we think these are less important.

Thank you,
Teodor

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