[jira] Created: (TIKA-239) System.err prints from XmlRootExtractor

System.err prints from XmlRootExtractor
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                 Key: TIKA-239
                 URL: https://issues.apache.org/jira/browse/TIKA-239
             Project: Tika
          Issue Type: Bug
          Components: parser
            Reporter: Jukka Zitting


The XmlRootExtractor is often given non-XML files to look at, which causes the XML parser to fail with error messages. It looks like the default behaviour is to print some of these error messages to System.err, as shown below:

$ java -jar tika-app-0.4-SNAPSHOT.jar --text lucene-2.2.0-src.zip > /dev/null
java.io.EOFException
        at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.endEntity(XMLDTDScannerImpl.java:662)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.endEntity(XMLEntityManager.java:1393)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.load(XMLEntityScanner.java:1763)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.skipSpaces(XMLEntityScanner.java:1543)
        at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.skipSeparator(XMLDTDScannerImpl.java:2055)
        at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.scanEntityDecl(XMLDTDScannerImpl.java:1533)
        at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.scanDecls(XMLDTDScannerImpl.java:1986)
        at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.scanDTDInternalSubset(XMLDTDScannerImpl.java:377)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(XMLDocumentScannerImpl.java:1140)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(XMLDocumentScannerImpl.java:1089)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:976)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
        at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
        at javax.xml.parsers.SAXParser.parse(SAXParser.java:395)
        at javax.xml.parsers.SAXParser.parse(SAXParser.java:198)
        at org.apache.tika.detect.XmlRootExtractor.extractRootElement(XmlRootExtractor.java:55)
        at org.apache.tika.mime.MimeTypes.getMimeType(MimeTypes.java:219)
        at org.apache.tika.mime.MimeTypes.detect(MimeTypes.java:514)
        at org.apache.tika.parser.AutoDetectParser.parse(AutoDetectParser.java:76)
        at org.apache.tika.parser.DelegatingParser.parse(DelegatingParser.java:83)
        at org.apache.tika.parser.pkg.PackageParser.parseEntry(PackageParser.java:65)
        at org.apache.tika.parser.pkg.ZipParser.parse(ZipParser.java:56)
        at org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:119)
        at org.apache.tika.parser.AutoDetectParser.parse(AutoDetectParser.java:85)
        at org.apache.tika.parser.DelegatingParser.parse(DelegatingParser.java:83)
        at org.apache.tika.parser.pkg.PackageParser.parseEntry(PackageParser.java:65)
        at org.apache.tika.parser.pkg.ZipParser.parse(ZipParser.java:56)
        at org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:119)
        at org.apache.tika.parser.AutoDetectParser.parse(AutoDetectParser.java:85)
        at org.apache.tika.cli.TikaCLI.process(TikaCLI.java:116)
        at org.apache.tika.cli.TikaCLI.main(TikaCLI.java:57)

Tika should never print stuff to System.out or System.err unless explicitly instructed to do so.

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