Bug 700182

Summary: [PATCH] Batik can't operate headless
Product: Red Hat Enterprise Linux 6 Reporter: Lubomir Rintel <lkundrak>
Component: batikAssignee: Mikolaj Izdebski <mizdebsk>
Status: CLOSED NOTABUG QA Contact: Desktop QE <desktop-qa-list>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 6.0CC: mizdebsk
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-05-30 09:12:24 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Attachments:
Description Flags
Backported fix none

Description Lubomir Rintel 2011-04-27 17:04:03 UTC 
Created attachment 495289 [details]
Backported fix

Steps to reproduce:

E.g. with fop:
Create a FO document referencing a SVG image

<?xml version="1.0"?>
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
  <fo:layout-master-set>
    <fo:simple-page-master master-name="foo">
      <fo:region-body/>
    </fo:simple-page-master>
  </fo:layout-master-set>
  <fo:page-sequence master-reference="foo">
    <fo:flow flow-name="xsl-region-body">
      <fo:block>
        <fo:external-graphic src="image.svg"/>
      </fo:block>
    </fo:flow>
  </fo:page-sequence>
</fo:root>

And attempt to render it:

$ DISPLAY= fop lal.fo lal.pdf
Exception in thread "main" java.lang.InternalError: Can't connect to X11 window server using '' as the value of the DISPLAY variable.
	at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
	at sun.awt.X11GraphicsEnvironment.access$100(X11GraphicsEnvironment.java:52)
	at sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:155)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:131)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:169)
	at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
	at sun.awt.X11.XToolkit.<clinit>(XToolkit.java:89)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:169)
	at java.awt.Toolkit$2.run(Toolkit.java:834)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:826)
	at org.apache.batik.bridge.CursorManager.<clinit>(CursorManager.java:102)
	at org.apache.batik.bridge.BridgeContext.<init>(BridgeContext.java:1154)
	at org.apache.batik.bridge.BridgeContext.<init>(BridgeContext.java:289)
	at org.apache.fop.image.loader.batik.PreloaderSVG$Loader.createImageInfo(PreloaderSVG.java:160)
	at org.apache.fop.image.loader.batik.PreloaderSVG$Loader.getImage(PreloaderSVG.java:124)
	at org.apache.fop.image.loader.batik.PreloaderSVG$Loader.access$100(PreloaderSVG.java:105)
	at org.apache.fop.image.loader.batik.PreloaderSVG.preloadImage(PreloaderSVG.java:73)
	at org.apache.xmlgraphics.image.loader.ImageManager.preloadImage(ImageManager.java:165)
	at org.apache.xmlgraphics.image.loader.cache.ImageCache.needImageInfo(ImageCache.java:96)
	at org.apache.xmlgraphics.image.loader.ImageManager.getImageInfo(ImageManager.java:112)
	at org.apache.fop.fo.flow.ExternalGraphic.bind(ExternalGraphic.java:79)
	at org.apache.fop.fo.FObj.processNode(FObj.java:126)
	at org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:286)
	at org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:163)
	at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.closeStartTag(ToXMLSAXHandler.java:204)
	at com.sun.org.apache.xml.internal.serializer.ToSAXHandler.flushPending(ToSAXHandler.java:277)
	at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.endElement(ToXMLSAXHandler.java:243)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:601)
	at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:180)
	at com.sun.org.apache.xerces.internal.xinclude.XIncludeHandler.emptyElement(XIncludeHandler.java:979)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:377)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2755)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
	at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
	at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(TransformerImpl.java:636)
	at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:707)
	at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:313)
	at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:214)
	at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:125)
	at org.apache.fop.cli.Main.startFOP(Main.java:166)
	at org.apache.fop.cli.Main.main(Main.java:196)
Comment 1 Lubomir Rintel 2011-04-27 17:07:35 UTC 
Also affects fedora.

I'd be very thankful if this could make it into F15 and even more thankful for an F14 update.
Comment 3 RHEL Program Management 2011-04-27 17:37:35 UTC 
This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated
in the current release, Red Hat is unfortunately unable to
address this request at this time. Red Hat invites you to
ask your support representative to propose this request, if
appropriate and relevant, in the next release of Red Hat
Enterprise Linux. If you would like it considered as an
exception in the current release, please ask your support
representative.
Comment 4 Mikolaj Izdebski 2012-05-30 09:12:24 UTC 
It's true that batik doesn't work with DISPLAY environmental variable set to an empty string, but it this case Java Virtual Machine does not operate in headless mode. If you want to enable headless mode you need to unset DISPLAY, which is different from setting ti to an empty string.

I tested batik on current RHEL 6 and it does work in headless mode (after unsetting DISPLAY):

$ unset DISPLAY
$ export DISPLAY
$ fop foo.fo foo.pdf 
$ echo $?
0

If you think that Java Virtual Machine should operate in headless mode when DISPLAY is set to an empty string, you should file a bug against JVM. In any case this is not a bug in batik, therefore I'm closing it.