500 Servlet Exception

java.lang.ArrayIndexOutOfBoundsException: 10
	at java.util.ArrayList.clear(ArrayList.java:453)
	at com.hapark.lucene.News_searcherNew.updateSearcher(News_searcherNew.java:104)
	at com.hapark.lucene.News_searcherNew.<init>(News_searcherNew.java:93)
	at _jsp._mk_0old_0news__jsp._jspService(mk_old_news.jsp:12)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:63)
	at com.caucho.jsp.Page.pageservice(Page.java:577)
	at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:192)
	at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:175)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:241)
	at com.caucho.server.hmux.HmuxRequest.handleRequest(HmuxRequest.java:424)
	at com.caucho.server.port.TcpConnection.run(TcpConnection.java:477)
	at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:600)
	at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:522)
	at java.lang.Thread.run(Thread.java:662)