java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at org.archive.net.UURIFactory.checkHttpSchemeSpecificPartSlashPrefix(UURIFactory.java:567)
at org.archive.net.UURIFactory.fixup(UURIFactory.java:462)
at org.archive.net.UURIFactory.create(UURIFactory.java:322)
at org.archive.net.UURIFactory.create(UURIFactory.java:312)
at org.archive.net.UURIFactory.getInstance(UURIFactory.java:265)
at org.archive.crawler.frontier.RecoveryJournal.importQueuesFromLog(RecoveryJournal.java:320)
at org.archive.crawler.frontier.RecoveryJournal.access$000(RecoveryJournal.java:60)
at org.archive.crawler.frontier.RecoveryJournal$1.run(RecoveryJournal.java:169)
at java.lang.Thread.run(Thread.java:619)

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