[How do I prevent a subreport from rendering over the top of other elements?]

I forgot to mention, I am using JasperSoft Studio 5.5.1, and Jasper Reports library version 5.5.1.

[How do I prevent a subreport from rendering over the top of other elements?]

Using PositionType=Float seems to cause the report to take a really long time to generate, and during that time the thread generating it dies with an OutOfMemoryError. I have just tried using extra detail bands like you said, but now each detail band appears on a separate page. I then tried setting "Ignore Pagination" on the report to true, but now it won't start a new page on a new report record, and instead only starts a new page when the data is too long for the same page.

 

I definitely need all the detail bands on the one page (except when the data is too long of course), and to have each report record appear on a new page.

 

Also, I still have the problem that some of the static text labels are missing.

[How do I prevent a subreport from rendering over the top of other elements?]

I have made the changes you suggested, though I attached a PDF sample report instead of making screenshots.

[How do I prevent a subreport from rendering over the top of other elements?]

I am using Jaspersoft Stuido.

 

I have a master report that contains three sub-reports, named "vehicleListSubReport.jrxml", "locoSubreport.jrxml", and "crewSubreport.jrxml" Their datasources are the fields "vehicleReport", "locoReport" and "crewReport" respectively, which are all objects of type JRDataSource. I have attached the jrxml file for the master report, and a pdf file for a sample of the output.

 

I am having a few problems, but I feel that they may have a single root cause, hence why I am asking about them all in the same question.

 

First problem: The crewSubreport has other report elements below it, including the other two sub-reports. If there are multiple records in this sub-report, it renders on top of the elements below it, including the other sub-reports.

 

Second problem: The data text fields below the crewSubreport are rendering (although with the subreport rendering on top of them), however, the static text boxes with the labels "Train Summary", "Number Vehicles:", "Tonnes Hauled:", "Total Length:", "Locos:", and "Tonnes Gross:" are not rendering, and I not yet able to determine why.

 

Third problem: Similar to the first problem, the locoSubreport is rendering into the space occupied by the vehicleListSubreport.

 

How do I fix these issues?

 

EDIT: I am adding the jrxml file that I made by changing the position type of the elements below the first subreport to "Float". I am hoping someone can explain why this approach causes my program to throw the following OutOfMemoryError:

 

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | net.sf.jasperreports.engine.JRRuntimeException: java.lang.OutOfMemoryError: GC overhead limit exceeded

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRFillSubreport.prepare(JRFillSubreport.java:783)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:331)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:384)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:358)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2091)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:778)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:288)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:151)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:939)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:871)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:114)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:653)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:569)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:915)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at au.com.fourtel.report.plugin.api.AbstractReportGenerator.fillReport(AbstractReportGenerator.java:58)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at au.com.fourtel.report.plugin.api.AbstractGenerateReportAgent.generateResult(AbstractGenerateReportAgent.java:159)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at au.com.fourtel.report.plugin.api.AbstractGenerateReportAgent.generateReport(AbstractGenerateReportAgent.java:81)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at au.com.fourtel.report.plugin.api.AbstractGenerateReportAgent.processRequest(AbstractGenerateReportAgent.java:55)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at au.com.fourtel.fourabs.src.FourAbsRequestProcessor.processRequest(FourAbsRequestProcessor.java:95)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at au.com.fourtel.src.server.ProcessConnection.run(ProcessConnection.java:69)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | Caused by: java.lang.OutOfMemoryError: GC overhead limit exceeded

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at java.util.HashMap.inflateTable(Unknown Source)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at java.util.HashMap.put(Unknown Source)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRBaseFiller.createBoundElementMaps(JRBaseFiller.java:1241)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRBaseFiller.createBoundElemementMaps(JRBaseFiller.java:1217)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:900)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:871)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRFillSubreport.fillSubreport(JRFillSubreport.java:656)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.JRSubreportRunnable.run(JRSubreportRunnable.java:59)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at net.sf.jasperreports.engine.fill.AbstractThreadSubreportRunner.run(AbstractThreadSubreportRunner.java:203)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

INFO   | jvm 1    | 2014/03/19 14:55:09.567 | at java.lang.Thread.run(Unknown Source)