500 Servlet Exception

[show] java.lang.NullPointerException

java.lang.NullPointerException
	at cn.com.pc.cosme.entity.Series.getJsonArray(Series.java:198)
	at _jsp._common._2013._brand_0sort_0new__jsp._jspService(common/2013/brand_sort_new.jsp:18)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:61)
	at com.caucho.jsp.Page.pageservice(Page.java:578)
	at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:195)
	at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:97)
	at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:192)
	at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
	at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:504)
	at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:368)
	at com.caucho.jsp.PageContextImpl.include(PageContextImpl.java:1009)
	at com.caucho.jsp.PageContextImpl.include(PageContextImpl.java:962)
	at _jsp._serial_0index__jsp._jspService(serial_index.jsp:315)
	at com.caucho.jsp.JavaPage.service(JavaPage.java:61)
	at com.caucho.jsp.Page.pageservice(Page.java:578)
	at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:195)
	at org.gelivable.web.EnvFilter.doFilter(EnvFilter.java:60)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at org.gelivable.web.gzip.GZIPFilter.doFilter(GZIPFilter.java:86)
	at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
	at com.caucho.server.cache.CacheFilterChain.doFilter(CacheFilterChain.java:192)
	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$Item.runTasks(ThreadPool.java:730)
	at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:649)
	at java.lang.Thread.run(Thread.java:662)