iReport java heap space

I'm working on iReport 2.0.4,and when I put an sql statement to get the data i start to get this error :

Error filling print... java.lang.OutOfMemoryError: GC overhead limit exceeded null 
java.lang.OutOfMemoryErro开发者_如何学JAVAr: GC overhead limit exceeded 
Print was not filled. Try using an EmptyDataSource...

and Error: Java heap space.

Does anybody have any clue on how I can solve this? Any help is appreciated.

open

iReportInstallationDir/etc/ireport.conf 

change -J-Xms & -J-Xmx value according to your system resources

default_options="--branding ireport -J-Xms256m -J-Xmx512m  -J-Dorg.netbeans.ProxyClassLoader.level=1000"

Solution.. I Using ireport 5.6.0 tools and my report name is OPTAB.jrxml.

1. Right click on OPTAB in Report Inspector.
2. select Edit query.

3.Type "select 1 from dual" in Report query.

4.press Ok.

now see field in your Report Inspector it only contain 1.

Now run you report.

I hope This will Help you.

In my case, the problem margins were established for pages, by reducing the size of the first sheet solved the problem.

I got the same error with JDK 1.6 when i use Times New Roman font. With JDK 1.7 fix my problem.