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https://issues.apache.org/jira/browse/HTTPCORE-510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16355616#comment-16355616
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ASF subversion and git services commented on HTTPCORE-510:
----------------------------------------------------------
Commit 07f436a5a5ec0bc87e7213531076be461848d2e2 in httpcomponents-core's branch
refs/heads/master from [~garydgregory]
[ https://git-wip-us.apache.org/repos/asf?p=httpcomponents-core.git;h=07f436a ]
[HTTPCORE-510] Avoid an ArithmeticException in AbstractMultiworkerIOReactor by
failing earlier by checking ioThreadCount in IOReactorConfig constructor.
[HTTPCORE-511] Do not cache result of
Runtime.getRuntime().availableProcessors() in IOReactorConfig.
> Avoid an ArithmeticException in AbstractMultiworkerIOReactor by failing
> earlier by checking ioThreadCount in IOReactorConfig constructor.
> -----------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HTTPCORE-510
> URL: https://issues.apache.org/jira/browse/HTTPCORE-510
> Project: HttpComponents HttpCore
> Issue Type: Improvement
> Reporter: Gary Gregory
> Assignee: Gary Gregory
> Priority: Major
> Fix For: 4.4.10, 5.0-beta3
>
>
> Avoid an {{ArithmeticException}} in {{AbstractMultiworkerIOReactor}} by
> failing eariler by checking {{ioThreadCount}} in {{IOReactorConfig}}
> constructor.
> If you build an {{IOReactorConfig}} with an {{ioThreadCount}} equal to 0, you
> will get the exception below. This can be avoided by failing earlier in the
> {{IOReactorConfig}} constructor.
> {noformat}
> java.lang.ArithmeticException: / by zero
> at
> org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.addChannel(AbstractMultiworkerIOReactor.java:473)
> ~[httpcore-nio-4.4.9.jar:4.4.9]
> at
> org.apache.http.impl.nio.reactor.DefaultListeningIOReactor.processEvent(DefaultListeningIOReactor.java:189)
> ~[httpcore-nio-4.4.9.jar:4.4.9]
> at
> org.apache.http.impl.nio.reactor.DefaultListeningIOReactor.processEvents(DefaultListeningIOReactor.java:151)
> ~[httpcore-nio-4.4.9.jar:4.4.9]
> at
> org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:348)
> ~[httpcore-nio-4.4.9.jar:4.4.9]
> {noformat}
> Instead of the above, you will get an {{IllegalArgumentException}} from the
> {{IOReactorConfig}} constructor.
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