[ https://issues.apache.org/jira/browse/NUTCH-1410?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lewis John McGibbney closed NUTCH-1410. --------------------------------------- > impact of a map-reduce problem > ------------------------------ > > Key: NUTCH-1410 > URL: https://issues.apache.org/jira/browse/NUTCH-1410 > Project: Nutch > Issue Type: Bug > Components: fetcher, generator > Reporter: behnam nikbakht > Fix For: 2.3 > > > with a simple test , found that each mapper or reducer have a local view of > variables. in Nutch, there are multiple places that share a variable between > mappers or reducers , for example in generate there is a shared variable : > hostCounts . or in fetcher , the last request time for each mapper > (fetcherThread) is different from another. > this problem cause critical problems like send multiple requests to same host > that cause to block. -- This message was sent by Atlassian JIRA (v6.2#6252)