OOM error while searching in lucene

Dear All,

Im new to lucene. Im facing problem while searching against lucene index of size 8+Gb. I dont know the reason behind that. Im pasting the error below

Exception in thread "Thread-5" java.lang.OutOfMemoryError: Java heap space
at org.apache.lucene.store.RAMOutputStream.flushBuffe r(RAMOutputStream.java:75)
at org.apache.lucene.store.OutputStream.flush(OutputS tream.java:131)
at org.apache.lucene.store.OutputStream.seek(OutputSt ream.java:160)
at org.apache.lucene.store.RAMOutputStream.seek(RAMOu tputStream.java:101)
at org.apache.lucene.index.CompoundFileWriter.close(C ompoundFileWriter.java:170)
at org.apache.lucene.index.SegmentMerger.createCompou ndFile(SegmentMerger.java:152)
at org.apache.lucene.index.SegmentMerger.merge(Segmen tMerger.java:100)
at org.apache.lucene.index.IndexWriter.mergeSegments( IndexWriter.java:487)
at org.apache.lucene.index.IndexWriter.flushRamSegmen ts(IndexWriter.java:440)
at org.apache.lucene.index.IndexWriter.close(IndexWri ter.java:242)

I dont know where the code goes wrong???

Any help will be highly appreciated.

Thanks & Regards,
Madhukar Kumar

You need to increase heap size

if Java runs out of memory, the following error occurs:

java.lang.OutOfMemoryError: Java heap space

This can have two reasons:

* Your Java application has a memory leak. There are tools like YourKit Java Profiler that help you to identify such leaks.
* Your Java application really needs a lot of memory (more than 128 MB by default!). In this case the Java heap size can be increased using the following runtime parameters:

java -Xms<initial heap size> -Xmx<maximum heap size>

Defaults are:

java -Xms32m -Xmx128m

You can set this either in the Java Control Panel or on the command line, depending on the environment you run your application.

Thanks a lot dear...

I have already tried the second option but didnt tried the first one .Will try and revert to you.

Thanks & Regards,
Madhukar