OutOfMemoryError in a few seconds due to the thread local cache of SAXParser
instances
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Key: XALANJ-2117
URL: http://issues.apache.org/jira/browse/XALANJ-2117
Project: XalanJ2
Type: Bug
Components: Xalan
Versions: 2.6
Environment: generic
Reporter: Carlo Marchiori
This simple program causes an OutOfMemoryError in a few seconds due to the
thread local cache of SAXParser instances (see XmlReaderManager class).
The problem is particularly annoying when threads are often created (because
the server is under heavy load, because application exceptions kill existing
threads, because applications create short live threads in which to perform
transformations, because...)
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import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
public class Prova
{
public static void main (String[] args) throws Exception,
TransformerFactoryConfigurationError
{
final TransformerFactory newInstance = TransformerFactory.newInstance();
final Object monitor = new Object ();
for (;;)
{
synchronized (monitor)
{
new Thread ()
{
public void run ()
{
try
{
synchronized (monitor)
{
Source xsl = new StreamSource
("prova.xsl");
Transformer transformer =
newInstance.newTransformer(xsl);
Source xml = new StreamSource
("prova.xml");
transformer.transform(xml, new
StreamResult ("ouput.xml"));
monitor.notify();
}
}
catch (Exception e)
{
e.printStackTrace();
System.exit(1);
}
}
}.start();
monitor.wait();
Thread.yield();
}
}
}
}
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