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Runping Qi commented on HADOOP-2175: ------------------------------------ then we need to try the patch for hadoop-1984. Currently, a job may stall forever (I waited 30+ minutes, and eventually killed the job). > Blacklisted hosts may not be able to serve map outputs > ------------------------------------------------------ > > Key: HADOOP-2175 > URL: https://issues.apache.org/jira/browse/HADOOP-2175 > Project: Hadoop > Issue Type: Bug > Components: mapred > Reporter: Runping Qi > Assignee: Arun C Murthy > > After a node fails 4 mappers (tasks), it is added to blacklist thus it will > no longer accept tasks. > But, it will continue serve the map outputs of any mappers that ran > successfully there. > However, the node may not be able serve the map outputs either. > This will cause the reducers to mark the corresponding map outputs as from > slow hosts, > but continue to try to get the map outputs from that node. > This may lead to waiting forever. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.