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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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Description:
Hi, as I can see in 1.11 release ProtocolFactory class still has an issue in
getProtocol method. This is because every fetcher thread has its own
ProtocolFactory instance (this.protocolFactory = new ProtocolFactory(conf); in
FetcherThread constructor.)
So have this method synchronized is useless, because each thread has its own
monitor.
In our project we have issue of having multiple Protocol instances.
Issue can be fixed if getProtocol method will use shared conf instance as lock
object or by having one ProtocolFactory for all fetcher threads.
was:
Hi, as I can see in 1.11 release ProtocolFactory clas still has an issue in
getProtocol method. This is because every fetcher thread has its own
ProtocolFactory instance (this.protocolFactory = new ProtocolFactory(conf); in
FetcherThread constructor.)
So have this method synchronized is useless, because each thread has its own
monitor.
In our project we have issue of having multiple Protocol instances.
Issue can be fixed if getProtocol method will use shared conf instance as lock
object or by having one ProtocolFactory for all fetcher threads.
> 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
>
>
> Hi, as I can see in 1.11 release ProtocolFactory class still has an issue in
> getProtocol method. This is because every fetcher thread has its own
> ProtocolFactory instance (this.protocolFactory = new ProtocolFactory(conf);
> in FetcherThread constructor.)
> So have this method synchronized is useless, because each thread has its own
> monitor.
> In our project we have issue of having multiple Protocol instances.
> Issue can be fixed if getProtocol method will use shared conf instance as
> lock object or by having one ProtocolFactory for all fetcher threads.
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