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java.lang.NullPointerException: 	at org.archive.crawler.processor.recrawl.PersistLogProcessor.finalTasks(PersistLogProcessor.java:87)	at org.archive.crawler.framework.CrawlController.runProcessorFinalTasks(CrawlController.java:1676)	at org.archive.crawler.framework.CrawlController.completeStop(CrawlController.java:1031)	at org.archive.crawler.admin.CrawlJob$MBeanCrawlController.completeStop(CrawlJob.java:801)	at org.archive.crawler.framework.CrawlController.toeEnded(CrawlController.java:1817)	at org.archive.crawler.framework.ToeThread.run(ToeThread.java:186)