[mkgmap-dev] Out of heap space: Too many tags?

Tue Feb 24 21:17:47 GMT 2009

I just tried to compile a relatively small tile and got an out of memory 
error from Java! Normally when the tiles get too large, there are error 
messages from mkgmap. So I investigated a little bit and found out that 
the tile in question contained a huge number of <tag>s. The number of tags 
is ten times the number of nodes in the file.

Is it possible that all these tags filled up my memory?

Here's a list of the most frequently occuring tags:

k='kms:parish_name'
k='kms:parish_no'
k='kms:city_name'
k='kms:county_name'
k='kms:county_no'
k='kms:house_no'
k='kms:last_updated'
k='kms:municipality_name'
k='kms:municipality_no'
k='kms:street_name'
k='kms:street_no'
k='kms:zip_name'
k='kms:zip_no'
k='addr:housenumber'
k='addr:street'
k='addr:city'
k='addr:postcode'
k='source'

And here's the Exception:

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
         at java.util.Arrays.copyOfRange(Arrays.java:3209)
         at java.lang.String.<init>(String.java:216)
         at 
com.sun.org.apache.xerces.internal.xni.XMLString.toString(XMLString.j
ava:185)
         at 
com.sun.org.apache.xerces.internal.util.XMLAttributesImpl.getValue(XM
LAttributesImpl.java:557)
         at 
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser$Attribut
esProxy.getValue(AbstractSAXParser.java:2323)
         at 
uk.me.parabola.mkgmap.reader.osm.xml.Osm5XmlHandler.startInNode(Osm5X
mlHandler.java:178)
         at 
uk.me.parabola.mkgmap.reader.osm.xml.Osm5XmlHandler.startElement(Osm5
XmlHandler.java:136)
         at 
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startEle
ment(AbstractSAXParser.java:501)
         at 
com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.
emptyElement(AbstractXMLDocumentParser.java:179)
         at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanStartElement(XMLDocumentFragmentScannerImpl.java:1339)
         at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2747)
         at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(X
MLDocumentScannerImpl.java:648)
         at 
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImp
l.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
         at 
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(X
ML11Configuration.java:807)
         at 
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(X
ML11Configuration.java:737)
         at 
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.
java:107)
         at 
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Ab
stractSAXParser.java:1205)
         at 
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.p
arse(SAXParserImpl.java:522)
         at javax.xml.parsers.SAXParser.parse(SAXParser.java:395)
         at javax.xml.parsers.SAXParser.parse(SAXParser.java:198)
         at 
uk.me.parabola.mkgmap.reader.osm.xml.Osm5MapDataSource.load(Osm5MapDa
taSource.java:78)
         at 
uk.me.parabola.mkgmap.main.MapMaker.loadFromFile(MapMaker.java:134)
         at uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:51)
         at uk.me.parabola.mkgmap.main.Main.processFilename(Main.java:150)
         at 
uk.me.parabola.mkgmap.CommandArgs$Filename.processArg(CommandArgs.jav
a:329)
         at 
uk.me.parabola.mkgmap.CommandArgs.readArgs(CommandArgs.java:119)
         at uk.me.parabola.mkgmap.main.Main.main(Main.java:91)

-Wolfgang