Parsing Large XML Files with Jackson XML - OutOfMemoryError in Java
I've searched everywhere and can't find a clear answer. I'm trying to implement This might be a silly question, but I'm using Jackson XML to parse a large XML file (around 500 MB) and I'm running into an `OutOfMemoryError`. Despite increasing the heap size in my JVM with `-Xmx2g`, I still encounter the behavior during parsing. My code looks like this: ```java import com.fasterxml.jackson.dataformat.xml.XmlMapper; import java.io.File; public class XmlParser { public static void main(String[] args) { try { XmlMapper xmlMapper = new XmlMapper(); MyData myData = xmlMapper.readValue(new File("path/to/large-file.xml"), MyData.class); System.out.println(myData); } catch (Exception e) { e.printStackTrace(); } } } ``` The `MyData` class is annotated for XML mapping, and I've ensured that its structure matches the XML. I even tried streaming the XML with `XmlMapper`'s tree model but still faced memory issues. This is the relevant snippet of my XML: ```xml <root> <item> <name>Item 1</name> <value>Value 1</value> </item> <!-- Many more items --> </root> ``` When I run the code, I occasionally get: ``` Exception in thread "main" java.lang.OutOfMemoryError: Java heap space ``` My goal is to parse this file efficiently without exhausting memory. Are there any best practices or alternative approaches I could take to handle large XML files with Jackson? Should I consider using a streaming API or another library altogether? Any insights would be greatly appreciated! I've been using Java for about a year now.