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java.lang.NullPointerException: 	at com.jaeksoft.searchlib.parser.htmlParser.HtmlDocumentProvider.getTitle(HtmlDocumentProvider.java:87)	at com.jaeksoft.searchlib.parser.htmlParser.HtmlDocumentProvider.score(HtmlDocumentProvider.java:78)	at com.jaeksoft.searchlib.parser.htmlParser.HtmlDocumentProvider.bestScore(HtmlDocumentProvider.java:150)	at com.jaeksoft.searchlib.parser.HtmlParser.findBestProvider(HtmlParser.java:224)	at com.jaeksoft.searchlib.parser.HtmlParser.parseContent(HtmlParser.java:305)	at com.jaeksoft.searchlib.parser.Parser.doParserContent(Parser.java:182)	at com.jaeksoft.searchlib.parser.Parser.parseStream(Parser.java:195)	at com.jaeksoft.searchlib.parser.ParserSelector.parseStream(ParserSelector.java:398)	at com.jaeksoft.searchlib.crawler.web.spider.Crawl.parseContent(Crawl.java:144)	at com.jaeksoft.searchlib.crawler.web.spider.Crawl.download(Crawl.java:269)	at com.jaeksoft.searchlib.crawler.web.process.WebCrawlThread.crawl(WebCrawlThread.java:176)	at com.jaeksoft.searchlib.crawler.web.process.WebCrawlThread.runner(WebCrawlThread.java:119)	at com.jaeksoft.searchlib.process.ThreadAbstract.run(ThreadAbstract.java:259)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)	at java.lang.Thread.run(Thread.java:662)