NullPointerException when calling readdb on empty database

Hi, I'm getting the following error: $ bin/nutch readdb crawl-chat/crawldb -stats CrawlDb statistics start: crawl-chat/crawldb Statistics for CrawlDb: crawl-chat/crawldb Exception in thread main java.lang.NullPointerException at

Re: NullPointerException when calling readdb on empty database

which version of Nutch are you using? Is chat a plain text file, with URLs in a list on per line? If this the case there is no need to add it to your crawl command. Additionally, there is no point in trying to read what is happeneing in your crawldb if your generator log output indicates that