Re: [Geotools-gt2-users] Memory Leak in Streaming Parser

[Matthijs L. <mat...@b3...>]

If you're just looking to parse a GML geometry and not a complete 
"application schema", try using the very simple streaming parser:

https://docs.geotools.org/stable/userguide/unsupported/gml-geometry-streaming.html

It is a lot faster than the XSD based parser, especially if you use the 
Aalto or Woodstox XML parser.

Matthijs

On 21/04/2023 13.46, ger...@gm... wrote:
>>>
>>> Hello togehter,
>>>
>>> my usecase is using method StreamingParser.parse()  in a loop in my 
>>> java application (ca. 5000 iterations). Unfortunately this leads to 
>>> a huge memory leak. Also this memory can never be released by the 
>>> garbage collector. It stays in the old gen heap forever.
>>>
>>> I use
>>>
>>> https://github.com/geotools/geotools/blob/main/modules/extension/xsd/xsd-core/src/main/java/org/geotools/xsd/StreamingParser.java
>>>
>>>
>>> in this way:
>>>
>>> for(.....) {
>>>      try {
>>>              org.geotools.xsd.StreamingParser parser  = new org.geotools.xsd.StreamingParser(gml, inputStream, Polygon.class);
>>>              polygon = (Polygon) parser.parse();
>>>      } finally {
>>>              inputStream.close();
>>>      }
>>> }
>>>
>>>
>>>
>>> Do you have any idea why that happens? Are you even able to fix it?
>>>
>>>
>>> I use the following maven dependency:
>>>
>>> <dependency>
>>>      <groupId>org.geotools.xsd</groupId>
>>>      <artifactId>gt-xsd-wfs</artifactId>
>>>      <version>27.2</version>
>>> </dependency>
>>>
>>>
>>>
>>> Best regards,
>>>
>>> Gero
>>>
>
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