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java.lang.NullPointerException: null at fr.pilato.elasticsearch.crawler.fs.rest.RestServer.start(RestServer.java:57)[fscrawler-2.2-SNAPSHOT.jar:?] at fr.pilato.elasticsearch.crawler.fs.FsCrawlerImpl.start(FsCrawlerImpl.java:178)[fscrawler-2.2-SNAPSHOT.jar:?] at fr.pilato.elasticsearch.crawler.fs.FsCrawler.main(FsCrawler.java:232)[fscrawler-2.2-SNAPSHOT.jar:?]