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java.lang.NullPointerException: null at[fscrawler-2.2-SNAPSHOT.jar:?] at fr.pilato.elasticsearch.crawler.fs.FsCrawlerImpl.start([fscrawler-2.2-SNAPSHOT.jar:?] at fr.pilato.elasticsearch.crawler.fs.FsCrawler.main([fscrawler-2.2-SNAPSHOT.jar:?]