Hello,
Not sure if you're seeing the same problem as me (see thread RE: Axis
Response Time appears linear with load) but here's what I discovered in case
it helps.
I'm seeing traffic backup behind a synchronized call in
org.apache.axis.XMLUtils at line 317 (entire method follows)
public static Document newDocument(InputSource inp)
throws ParserConfigurationException, SAXException, IOException
{
DocumentBuilder db;
synchronized (dbf) {
db = dbf.newDocumentBuilder();
}
db.setEntityResolver(new DefaultEntityResolver());
db.setErrorHandler( new ParserErrorHandler() );
return( db.parse( inp ) );
}
Now dbf is an instance of "javax.xml.parsers.DocumentBuilderFactory" which
is an abstraction layer around the chosen XML parser in my case it resolves
to "org.apache.crimson.jaxp.DocumentBuilderFactoryImpl" the method called
under the synchronized block is:
public DocumentBuilder newDocumentBuilder()
throws ParserConfigurationException
{
DocumentBuilderImpl db = new DocumentBuilderImpl(this);
return db;
}
The constructor for DocumentBuilderImpl is doing a fair amount of work, time
constraints prevent me looking any deeper but I don't see any obvious need
for synchronization of this process.
What I suspect is that the good folks that develop Axis have synchronized
this because they can make no assumption about the implementation that
javax.xml.parsers.DocumentBuilderFactory abstracts. If this is the case then
I seems to me that the sync belongs in the DBF implementation not its
caller.
My personal instinct, unless anyone knows a good reason not, would be to
remove this specific synchronization point.
Thanks
Ray Sutton
Systems Engineer
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Friday, October 03, 2003 2:09 PM
To: [EMAIL PROTECTED]
Subject: Performance Issues with AXIS
Importance: High
Hi,
We are using Apache AXIS 1.1 to support a web service that returns images.
The images are base-64 encoded and embedded within the XML.
What we are seeing is very slow response times with AXIS when it tries to
construct the SOAP XML.The size of the images are in the range 50-100KB.
We are not sure if the large amount of data is the cause of the problem or
if we should be doing something else to overcome this problem ?
Thanks
Suket
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