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yacy_search_server
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fixed another memory leak in the PDF parser:

Browse Source 
the class org.apache.pdfbox.pdmodel.font.PDFont occupies 8MB of space
which cannot be cleaned if PDFont.clearResources is called.
The attempt to clean the class cache therefore causes that the class is
loaded and this cache is initialized with some rubbish. I tried to
prevent to instantiate this class by usage of a hacked findLoadedClass
call to the SystemClassLoader (which is protected ...).
Now, without using the PDF parser at all, 8MB of RAM space is not
occupied, however, when the first PDF arrives this space will be taked
and never given back to GC.
WAKE UP YOU LAZY PDFBOX HACKER AND FIX THIS SHIT!
pull/1/head
Michael Peter Christen 11 years ago
parent c152d996e6
commit 81d9e23532
1 changed files with 45 additions and 28 deletions
Show Stats Download Patch File Download Diff File

73
source/net/yacy/document/parser/pdfParser.java
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@ -32,27 +32,15 @@ import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Method;
import java.util.Date;
import org.apache.pdfbox.cos.COSName;
import org.apache.pdfbox.exceptions.CryptographyException;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDDocumentInformation;
import org.apache.pdfbox.pdmodel.encryption.AccessPermission;
import org.apache.pdfbox.pdmodel.encryption.BadSecurityHandlerException;
import org.apache.pdfbox.pdmodel.encryption.StandardDecryptionMaterial;
import org.apache.pdfbox.pdmodel.font.PDCIDFont;
import org.apache.pdfbox.pdmodel.font.PDCIDFontType0Font;
import org.apache.pdfbox.pdmodel.font.PDCIDFontType2Font;
import org.apache.pdfbox.pdmodel.font.PDFont;
import org.apache.pdfbox.pdmodel.font.PDMMType1Font;
import org.apache.pdfbox.pdmodel.font.PDSimpleFont;
import org.apache.pdfbox.pdmodel.font.PDTrueTypeFont;
import org.apache.pdfbox.pdmodel.font.PDType0Font;
import org.apache.pdfbox.pdmodel.font.PDType1AfmPfbFont;
import org.apache.pdfbox.pdmodel.font.PDType1CFont;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.pdfbox.pdmodel.font.PDType3Font;
import org.apache.pdfbox.util.PDFTextStripper;
import net.yacy.cora.document.id.AnchorURL;
@ -222,25 +210,54 @@ public class pdfParser extends AbstractParser implements Parser {
false,
docDate)};
}
@SuppressWarnings("static-access")
public static void clean_up_idiotic_PDFParser_font_cache_which_eats_up_tons_of_megabytes() {
// thank you very much, PDFParser hackers, this font cache will occupy >80MB RAM for a single pdf and then stays forever
// AND I DO NOT EVEN NEED A FONT HERE TO PARSE THE TEXT!
// Don't be so ignorant, just google once "PDFParser OutOfMemoryError" to feel the pain.
PDFont.clearResources();
COSName.clearResources();
PDType1Font.clearResources();
PDTrueTypeFont.clearResources();
PDType0Font.clearResources();
PDType1AfmPfbFont.clearResources();
PDType3Font.clearResources();
PDType1CFont.clearResources();
PDCIDFont.clearResources();
PDCIDFontType0Font.clearResources();
PDCIDFontType2Font.clearResources();
PDMMType1Font.clearResources();
PDSimpleFont.clearResources();
ResourceCleaner cl = new ResourceCleaner();
cl.clearClassResources("org.apache.pdfbox.cos.COSName");
cl.clearClassResources("org.apache.pdfbox.pdmodel.font.PDFont");
cl.clearClassResources("org.apache.pdfbox.pdmodel.font.PDType1Font");
cl.clearClassResources("org.apache.pdfbox.pdmodel.font.PDTrueTypeFont");
cl.clearClassResources("org.apache.pdfbox.pdmodel.font.PDType0Font");
cl.clearClassResources("org.apache.pdfbox.pdmodel.font.PDType1AfmPfbFont");
cl.clearClassResources("org.apache.pdfbox.pdmodel.font.PDType3Font");
cl.clearClassResources("org.apache.pdfbox.pdmodel.font.PDType1CFont");
cl.clearClassResources("org.apache.pdfbox.pdmodel.font.PDCIDFont");
cl.clearClassResources("org.apache.pdfbox.pdmodel.font.PDCIDFontType0Font");
cl.clearClassResources("org.apache.pdfbox.pdmodel.font.PDCIDFontType2Font");
cl.clearClassResources("org.apache.pdfbox.pdmodel.font.PDMMType1Font");
cl.clearClassResources("org.apache.pdfbox.pdmodel.font.PDSimpleFont");
}
@SuppressWarnings({ "unchecked", "rawtypes" })
private static class ResourceCleaner {
Method findLoadedClass;
private ClassLoader sys;
public ResourceCleaner() {
try {
this.findLoadedClass = ClassLoader.class.getDeclaredMethod("findLoadedClass", new Class[] { String.class });
this.findLoadedClass.setAccessible(true);
this.sys = ClassLoader.getSystemClassLoader();
} catch (Throwable e) {
e.printStackTrace();
this.findLoadedClass = null;
this.sys = null;
}
}
public void clearClassResources(String name) {
if (this.findLoadedClass == null) return;
try {
Object pdfparserpainclass = this.findLoadedClass.invoke(this.sys, name);
if (pdfparserpainclass != null) {
Method clearResources = ((Class) pdfparserpainclass).getDeclaredMethod("clearResources", new Class[] {});
if (clearResources != null) clearResources.invoke(null);
}
} catch (Throwable e) {
e.printStackTrace();
}
}
}
/**

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