[ http://issues.apache.org/jira/browse/NUTCH-308?page=all ]
Andrzej Bialecki closed NUTCH-308:
-----------------------------------
Resolution: Fixed
Patch applied.
> Maximum search time limit
> -------------------------
>
> Key: NUTCH-308
> URL: http://issues.apache.org/jira/browse/NUTCH-308
> Project: Nutch
> Type: Improvement
> Components: searcher
> Versions: 0.8-dev
> Reporter: Andrzej Bialecki
> Fix For: 0.8-dev
> Attachments: timeout.patch
>
> With large indexes it may often happen that search servers don't respond in
> time. The IPC code time-outs such calls, and the front-end
> DistributedSearch.Client no longer expects any results from the timed-out
> Server. However, the search thread is still running on the Server, until it
> completes (which may be even tens of seconds later), consuming server
> resources. Subsequent requests will run much slower, eventually leading to
> 100% CPU/disk utilization and an avalanche of timeouts.
> This patch adds support for a maximum search time limit. After this time is
> exceeded, the search thread is stopped, partial results (if any) are returned
> and the total number of results is estimated.
> This patch tries to minimize the overhead related to time-keeping by using a
> version of safe unsynchronized timer.
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