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https://issues.apache.org/jira/browse/HTTPCORE-650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17220436#comment-17220436
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赵延 commented on HTTPCORE-650:
-----------------------------
Take it easy. you can reproduce as follow.
step1. Find a windows pc.
step2. Install [HttpDebugger|https://www.httpdebugger.com/] and run it.
step3. Run application which create CloseableHttpAsyncClient in it.
step4. Wait 2 hours
step5. CPU spikes
> Jvm nio bug in windows cause cpu spike
> --------------------------------------
>
> Key: HTTPCORE-650
> URL: https://issues.apache.org/jira/browse/HTTPCORE-650
> Project: HttpComponents HttpCore
> Issue Type: Bug
> Components: HttpCore NIO
> Affects Versions: 4.4.14
> Environment: windows
> Reporter: 赵延
> Priority: Major
> Attachments: 95647544-cd788580-0b02-11eb-85a2-4b682054eba3.png,
> 96202208-33488f80-0f91-11eb-937e-7116a34f4ed9.png,
> 96218711-e4622080-0fb7-11eb-9354-f060f3c55bf8.png,
> 96358431-ac82e680-1139-11eb-9fc8-e84a48e2a029.png, stackInfo.txt,
> windows_nio_bug.mp4
>
>
> Recently, I found cpu spike when programer run about 2 hours, the stack refer
> that
> readyCount = this.selector.select(selectTimeout); in
> org.apache.http.impl.nio.reactor.AbstractIOReactor#execute always run. I
> found the same issue in other project such as
> jetty([https://github.com/eclipse/jetty.project/issues/2205)] and
> netty([https://github.com/netty/netty/issues/3857).] According the info from
> these issue, it's a jvm nio bug in windos. I want to fix it quickly, so I
> create a pr to fix it. https://github.com/apache/httpcomponents-core/pull/226
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