Getting this exception when running Nutch2 updatedb after fetch

[Tom Davidson]

java.lang.ArrayIndexOutOfBoundsException: 0
        at 
org.apache.nutch.util.TableUtil.reverseAppendSplits(TableUtil.java:126)
        at org.apache.nutch.util.TableUtil.reverseUrl(TableUtil.java:66)
        at org.apache.nutch.util.TableUtil.reverseUrl(TableUtil.java:43)
        at org.apache.nutch.crawl.DbUpdateMapper.map(DbUpdateMapper.java:70)
        at org.apache.nutch.crawl.DbUpdateMapper.map(DbUpdateMapper.java:36)
        at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:647)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:323)
        at org.apache.hadoop.mapred.Child$4.run(Child.java:270)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at 
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1127)
        at org.apache.hadoop.mapred.Child.main(Child.java:264)


It looks like TableUtil.reverseAppendSplits is not well behaved for malformed 
urls?