Possible BUG: Deadlock if I use Subreports

[2006 IR Open Discussion]

By: wilhelm tell - azgard

Possible BUG: Deadlock if I use Subreports

2003-05-01 23:33

Hi,

 

I use jasperReports 0.4.6 with J2SDK 1.4.1 on WinXP.

 

My problem is, I have a group-section in my report and this group-section includes in the <groupFooter> a subreport. I can compile and use this subreport as the main-report and the export to PDF is OK.

 

But if the subreport is included in my main-report then it runs in a deadlock in Class JRVerticalFiller on row 583.

 

if (detail.isToPrint()) {

while (

detail.getHeight() > columnFooterOffsetY - offsetY

) {

fillColumnBreak(JRExpression.EVALUATION_DEFAULT);

}

 

 

Here my report files:

 

Main-Report:

 

<?xml version="1.0"?>

<!DOCTYPE jasperReport PUBLIC "-//JasperReports//DTD Report Design//EN" "http://jasperreports.sourceforge.net/dtds/jasperreport.dtd";>

 

<jasperReport

name="DataSourceReport"

pageWidth="595"

pageHeight="842"

columnWidth="515"

columnSpacing="0"

leftMargin="40"

rightMargin="40"

topMargin="50"

bottomMargin="50">

 

<reportFont name="Arial_Normal" isDefault="true" fontName="Arial" size="12" pdfFontName="Helvetica" pdfEncoding="Cp1252" isPdfEmbedded="false"/>

<reportFont name="Arial_Bold" isDefault="false" fontName="Arial" size="12" isBold="true" pdfFontName="Helvetica-Bold" pdfEncoding="Cp1252" isPdfEmbedded="false"/>

<reportFont name="Arial_Italic" isDefault="false" fontName="Arial" size="12" isItalic="true" pdfFontName="Helvetica-Oblique" pdfEncoding="Cp1252" isPdfEmbedded="false"/>

 

<parameter name="ImageSubreport" class="dori.jasper.engine.JasperReport"/>

 

<field name="id" class="java.lang.String"/>

<field name="arzt" class="java.lang.String"/>

<field name="text" class="java.lang.String"/>

 

<group name="CityGroup" minHeightToStartNewPage="700" isStartNewPage="true">

<groupExpression>

$F{arzt}

</groupExpression>

<groupHeader>

<band height="20">

<rectangle>

<reportElement x="0" y="4" width="515" height="15" forecolor="#C0C0C0" backcolor="#C0C0C0"/>

<graphicElement stretchType="NoStretch"/>

</rectangle>

<textField>

<reportElement x="0" y="4" width="515" height="15" backcolor="#C0C0C0" mode="Opaque"/>

<textElement textAlignment="Left">

<font reportFont="Arial_Bold"/>

</textElement>

<textFieldExpression class="java.lang.String">

$F{arzt}

</textFieldExpression>

</textField>

<line>

<reportElement x="0" y="19" width="515" height="0"/>

<graphicElement stretchType="NoStretch"/>

</line>

</band>

</groupHeader>

<groupFooter>

<band height="340">

<subreport isUsingCache="true">

<reportElement x="0" y="0" width="520" height="340" backcolor="#FFCC99" isPrintRepeatedValues="false" isPrintWhenDetailOverflows="false" isRemoveLineWhenBlank="false"/>

<dataSourceExpression>

new reporttests.MyDataSource($F{arzt})

</dataSourceExpression>

<subreportExpression class="dori.jasper.engine.JasperReport">

$P{ImageSubreport}

</subreportExpression>

</subreport>

</band>

</groupFooter>

</group>

 

 

<detail>

<band height="20">

<textField>

<reportElement x="0" y="4" width="50" height="15"/>

<textElement textAlignment="Right"/>

<textFieldExpression class="java.lang.String">

$F{id}

</textFieldExpression>

</textField>

<textField isStretchWithOverflow="true">

<reportElement x="55" y="4" width="200" height="15" positionType="Float"/>

<textFieldExpression class="java.lang.String">

$F{arzt}

</textFieldExpression>

</textField>

<textField isStretchWithOverflow="true">

<reportElement x="260" y="4" width="255" height="15" positionType="Float"/>

<textFieldExpression class="java.lang.String">

$F{text}

</textFieldExpression>

</textField>

<line>

<reportElement x="0" y="19" width="515" height="0" forecolor="#808080" positionType="Float"/>

<graphicElement stretchType="NoStretch"/>

</line>

</band>

</detail>

</jasperReport>

 

 

And the subreport:

 

<?xml version="1.0"?>

<!DOCTYPE jasperReport PUBLIC "-//JasperReports//DTD Report Design//EN" "http://jasperreports.sourceforge.net/dtds/jasperreport.dtd";>

 

<jasperReport

name="DataSourceReport"

pageWidth="595"

pageHeight="842"

columnWidth="595"

columnSpacing="0"

leftMargin="0"

rightMargin="0"

topMargin="0"

bottomMargin="0">

 

<reportFont name="Arial_Normal" isDefault="true" fontName="Arial" size="12" pdfFontName="Helvetica" pdfEncoding="Cp1252" isPdfEmbedded="false"/>

<reportFont name="Arial_Bold" isDefault="false" fontName="Arial" size="12" isBold="true" pdfFontName="Helvetica-Bold" pdfEncoding="Cp1252" isPdfEmbedded="false"/>

<reportFont name="Arial_Italic" isDefault="false" fontName="Arial" size="12" isItalic="true" pdfFontName="Helvetica-Oblique" pdfEncoding="Cp1252" isPdfEmbedded="false"/>

 

<field name="id" class="java.lang.String"/>

<field name="arzt" class="java.lang.String"/>

<field name="text" class="java.lang.String"/>

<field name="imageurl" class="java.lang.Object"/>

 

<detail>

<band height="842">

<image scaleImage="RetainShape" hAlign="Center" isUsingCache="false">

<reportElement x="0" y="0" width="595" height="842"/>

<graphicElement pen="Thin"/>

<imageExpression class="java.net.URL">$F{imageurl}</imageExpression>

</image>

</band>

</detail>

</jasperReport>

 

 

Thank you for any hints.

 

Azgard

 

 

 

 

By: Teodor Danciu - teodord

RE: Possible BUG: Deadlock if I use Subreports

2003-05-07 13:34

 

Hi,

 

The detail section of the subreport is simply too large.

It is 842 pixels tall, but in the master report there

will be at most 842 - top margin - bottom margin= 742 pixels available.

 

The engine enters a loop trying to create a new

page in the document.

 

Please reconsider the layout of your subreport:

 

http://jasperreports.sourceforge.net/tips.tricks.html#largebands

 

Thank you,

Teodor