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Posted to j-dev@xerces.apache.org by "Lucian Holland (JIRA)" <xe...@xml.apache.org> on 2006/08/25 01:39:29 UTC
[jira] Created: (XERCESJ-1182) Race condition results in invalid
event type being reported from XMLStreamReader
Race condition results in invalid event type being reported from XMLStreamReader
--------------------------------------------------------------------------------
Key: XERCESJ-1182
URL: http://issues.apache.org/jira/browse/XERCESJ-1182
Project: Xerces2-J
Issue Type: Bug
Components: StAX
Reporter: Lucian Holland
Attachments: test.xml
The following code prints out "7" as it should do - the first event is a START_DOCUMENT event.
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setNamespaceAware(true);
factory.setFeature("http://xml.org/sax/features/namespace-prefixes", true);
SAXParser parser = factory.newSAXParser();
SAXSource source = new SAXSource(parser.getXMLReader(), new InputSource(FunctionalTestEventReading.class.getResourceAsStream("test.xml")));
XMLInputFactory inFac = new XMLInputFactoryImpl();
XMLStreamReader reader = inFac.createXMLStreamReader(source);
Thread.sleep(1000);
System.err.println(reader.getEventType());
If I remove the Thread.sleep, however, it prints "0". It would seem like something is being kicked off in another thread, and not having time to get the first bit of the document parsed before the call to getEventType(). FWIW I'm running this under Eclipse in a simple test class with a main method - presumably this is somewhat dependent on machine speed/environment etc. to be able to reproduce. I have attached the xml file I'm testing with.
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[jira] Commented: (XERCESJ-1182) Race condition results in invalid
event type being reported from XMLStreamReader
Posted by "Lucian Holland (JIRA)" <xe...@xml.apache.org>.
[ http://issues.apache.org/jira/browse/XERCESJ-1182?page=comments#action_12438966 ]
Lucian Holland commented on XERCESJ-1182:
-----------------------------------------
Thanks Michael - that works fine for me now.
> Race condition results in invalid event type being reported from XMLStreamReader
> --------------------------------------------------------------------------------
>
> Key: XERCESJ-1182
> URL: http://issues.apache.org/jira/browse/XERCESJ-1182
> Project: Xerces2-J
> Issue Type: Bug
> Components: StAX
> Reporter: Lucian Holland
> Assigned To: Michael Glavassevich
> Attachments: test.xml
>
>
> The following code prints out "7" as it should do - the first event is a START_DOCUMENT event.
> SAXParserFactory factory = SAXParserFactory.newInstance();
> factory.setNamespaceAware(true);
> factory.setFeature("http://xml.org/sax/features/namespace-prefixes", true);
> SAXParser parser = factory.newSAXParser();
> SAXSource source = new SAXSource(parser.getXMLReader(), new InputSource(FunctionalTestEventReading.class.getResourceAsStream("test.xml")));
> XMLInputFactory inFac = new XMLInputFactoryImpl();
> XMLStreamReader reader = inFac.createXMLStreamReader(source);
> Thread.sleep(1000);
> System.err.println(reader.getEventType());
> If I remove the Thread.sleep, however, it prints "0". It would seem like something is being kicked off in another thread, and not having time to get the first bit of the document parsed before the call to getEventType(). FWIW I'm running this under Eclipse in a simple test class with a main method - presumably this is somewhat dependent on machine speed/environment etc. to be able to reproduce. I have attached the xml file I'm testing with.
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[jira] Assigned: (XERCESJ-1182) Race condition results in invalid
event type being reported from XMLStreamReader
Posted by "Michael Glavassevich (JIRA)" <xe...@xml.apache.org>.
[ http://issues.apache.org/jira/browse/XERCESJ-1182?page=all ]
Michael Glavassevich reassigned XERCESJ-1182:
---------------------------------------------
Assignee: Michael Glavassevich
> Race condition results in invalid event type being reported from XMLStreamReader
> --------------------------------------------------------------------------------
>
> Key: XERCESJ-1182
> URL: http://issues.apache.org/jira/browse/XERCESJ-1182
> Project: Xerces2-J
> Issue Type: Bug
> Components: StAX
> Reporter: Lucian Holland
> Assigned To: Michael Glavassevich
> Attachments: test.xml
>
>
> The following code prints out "7" as it should do - the first event is a START_DOCUMENT event.
> SAXParserFactory factory = SAXParserFactory.newInstance();
> factory.setNamespaceAware(true);
> factory.setFeature("http://xml.org/sax/features/namespace-prefixes", true);
> SAXParser parser = factory.newSAXParser();
> SAXSource source = new SAXSource(parser.getXMLReader(), new InputSource(FunctionalTestEventReading.class.getResourceAsStream("test.xml")));
> XMLInputFactory inFac = new XMLInputFactoryImpl();
> XMLStreamReader reader = inFac.createXMLStreamReader(source);
> Thread.sleep(1000);
> System.err.println(reader.getEventType());
> If I remove the Thread.sleep, however, it prints "0". It would seem like something is being kicked off in another thread, and not having time to get the first bit of the document parsed before the call to getEventType(). FWIW I'm running this under Eclipse in a simple test class with a main method - presumably this is somewhat dependent on machine speed/environment etc. to be able to reproduce. I have attached the xml file I'm testing with.
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[jira] Resolved: (XERCESJ-1182) Race condition results in invalid
event type being reported from XMLStreamReader
Posted by "Michael Glavassevich (JIRA)" <xe...@xml.apache.org>.
[ http://issues.apache.org/jira/browse/XERCESJ-1182?page=all ]
Michael Glavassevich resolved XERCESJ-1182.
-------------------------------------------
Resolution: Fixed
There was a race condition which allowed the XMLStreamReader constructor to return before the start document event is produced. I've fixed that as well as significantly simplified the thread handling.
> Race condition results in invalid event type being reported from XMLStreamReader
> --------------------------------------------------------------------------------
>
> Key: XERCESJ-1182
> URL: http://issues.apache.org/jira/browse/XERCESJ-1182
> Project: Xerces2-J
> Issue Type: Bug
> Components: StAX
> Reporter: Lucian Holland
> Assigned To: Michael Glavassevich
> Attachments: test.xml
>
>
> The following code prints out "7" as it should do - the first event is a START_DOCUMENT event.
> SAXParserFactory factory = SAXParserFactory.newInstance();
> factory.setNamespaceAware(true);
> factory.setFeature("http://xml.org/sax/features/namespace-prefixes", true);
> SAXParser parser = factory.newSAXParser();
> SAXSource source = new SAXSource(parser.getXMLReader(), new InputSource(FunctionalTestEventReading.class.getResourceAsStream("test.xml")));
> XMLInputFactory inFac = new XMLInputFactoryImpl();
> XMLStreamReader reader = inFac.createXMLStreamReader(source);
> Thread.sleep(1000);
> System.err.println(reader.getEventType());
> If I remove the Thread.sleep, however, it prints "0". It would seem like something is being kicked off in another thread, and not having time to get the first bit of the document parsed before the call to getEventType(). FWIW I'm running this under Eclipse in a simple test class with a main method - presumably this is somewhat dependent on machine speed/environment etc. to be able to reproduce. I have attached the xml file I'm testing with.
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