NUTCH-2481 HostDatum deltas(previous step statistics) and Metadata expressions #278
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The logic of updatehostdb is changed slightly.
In case of specification of hostdb.deltaExpression, we dont reset statistics in mapper, but send the previous step statistic first to the reducer and reset it afterwards.
In line 215 of the mapper
if (readingCrawlDb)
is replaced by
if (readingCrawlDb && !isDeltaStatisticCalculated) {
hostDatum.resetStatistics();
Please, verify that logic doesn't break the current functionality.