[ http://issues.apache.org/jira/browse/NUTCH-331?page=all ]
Andrzej Bialecki closed NUTCH-331. ----------------------------------- Resolution: Cannot Reproduce Assignee: Andrzej Bialecki I can no longer reproduce this issue, and I suspect this was caused by NUTCH-361 . > Fetcher incorrectly reports task progress to tasktracker resulting in skipped > URLs > ---------------------------------------------------------------------------------- > > Key: NUTCH-331 > URL: http://issues.apache.org/jira/browse/NUTCH-331 > Project: Nutch > Issue Type: Bug > Components: fetcher > Affects Versions: 0.8, 0.9.0 > Reporter: Andrzej Bialecki > Assigned To: Andrzej Bialecki > Priority: Critical > Fix For: 0.9.0 > > > Each Fetcher task starts multiple FetcherThreads, which consume the input > fetchlist. These threads may block for a long time after being started and > after reading their input fetchlist entries, due to "politeness" settings. > However, the map-reduce framework considers the task as complete when all > input data is read. > This causes the tasktracker to incorreclty assume that task processing is > complete (because the task progress is 1.0, since all input has been > consumed), whereas many URLs from the fetchlist may still be waiting for > fetching, in blocked threads. The more threads is used the more apparent is > this problem, because the final number of fetched pages may be short of the > target number by as many as (numThreads * numMapTasks) entries. > The final result of this is that only a part of the fetchlist is fetched, > because Fetcher map tasks are stopped when their progress is 1.0. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Nutch-developers mailing list Nutch-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nutch-developers