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https://issues.apache.org/jira/browse/NUTCH-2253?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Leon Misakyan updated NUTCH-2253:
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Affects Version/s: (was: 2.2.1)
1.10
1.11
> ProtocolFactory still not thread-safe
> -------------------------------------
>
> Key: NUTCH-2253
> URL: https://issues.apache.org/jira/browse/NUTCH-2253
> Project: Nutch
> Issue Type: Bug
> Components: fetcher
> Affects Versions: 1.10, 1.11
> Reporter: Leon Misakyan
> Fix For: 2.3, 1.8
>
>
> The method getProtocol() should be synchronized otherwise the Fetcher threads
> can access it around the same time and query the cache before it's had a
> chance of being populated properly. This would happen for a handful of calls
> until the subsequent ones get the cache but this should be fixed nonetheless
> e.g. when we want a guarantee that the same Protocol instance will be called
> for the same fetching session.
> The other Factor classes which use the same cache mechanism would suffer from
> the same problem.
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