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xpath using dom4j- java.lang.OutOfMemoryError: Java heap space

Posted on 2009-03-29
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Last Modified: 2013-11-23
I am reading an xml file using dom4j,xpath expressions to extract fields.The xml file is very large
and I get the following error:
Exception in thread "main"  java.lang.OutOfMemoryError: Java heap space.
What is the best way to avoid this problem.
Thanks
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Question by:aswam1975
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Venabili earned 150 total points
ID: 24017370
How do you use dom4j? Are you using DOM or SAX?
Don't use DOM -- it tries to read the whole file in the memory.  So for big files, you will always have issues -- you can increase the heap memory but as soon as you try a bigger file (or more than one) and you will be back in the same mess.

If you are using SAX and you still have this issues - post some code because you should not have issues.
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by:aswam1975
ID: 24021091
ok- I was using dom,
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