jsf - Primefaces datatable export to excel won't work for huge data -

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i have small poc application made of primefaces , derbydb. have 80000 records 4 columns in derby db reflected in prime faces datatable. added export excel feature datatable poi jar. when click export excel works fine till 55000(+-1000) records , when crosses heap memory

exception in thread "http-bio-8080-asynctimeout" java.lang.outofmemoryerror: java heap space @ java.util.concurrent.concurrentlinkedqueue.iterator(concurrentlinkedqueue.java:452) @ org.apache.tomcat.util.net.jioendpoint$asynctimeout.run(jioendpoint.java:157) @ java.lang.thread.run(thread.java:619)

i use primefaces 3.4.2 , tried lazy loading doesn't solve issue either. please advice.


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