500 Servlet Exception

[show] java.lang.OutOfMemoryError

java.lang.OutOfMemoryError
	at java.io.RandomAccessFile.readBytes(Native Method)
	at java.io.RandomAccessFile.read(RandomAccessFile.java:315)
	at org.apache.lucene.store.FSInputStream.readInternal(FSDirectory.java:420)
	at org.apache.lucene.store.InputStream.readBytes(InputStream.java:61)
	at org.apache.lucene.store.RAMDirectory.<init>(RAMDirectory.java:64)
	at org.apache.lucene.store.RAMDirectory.<init>(RAMDirectory.java:89)
	at com.fige.core.FigeCacheServlet.ReloadFvips(FigeCacheServlet.java:167)
	at com.fige.core.FigeCacheServlet.getLatestNews(FigeCacheServlet.java:419)
	at com.fige.core.FigeMainServlet.doGet(FigeMainServlet.java:866)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:114)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:91)
	at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103)
	at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:273)
	at com.caucho.server.port.TcpConnection.run(TcpConnection.java:682)
	at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:743)
	at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:662)
	at java.lang.Thread.run(Thread.java:595)