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https://issues.apache.org/jira/browse/HTTPCLIENT-1396?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oleg Kalnichevski resolved HTTPCLIENT-1396.
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Resolution: Not A Problem
> PoolingClientConnectionManager seems to create one connection too many?
> -----------------------------------------------------------------------
>
> Key: HTTPCLIENT-1396
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1396
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient
> Affects Versions: 4.2.5
> Environment: Any
> Reporter: Neeme Praks
> Priority: Minor
> Attachments: TestPoolingConnManagerWithJetty.java
>
>
> See attached Junit test.
> You'll also need Jetty dependency:
> <dependency>
> <groupId>org.mortbay.jetty</groupId>
> <artifactId>jetty</artifactId>
> <version>6.1.26</version>
> <scope>test</scope>
> </dependency>
> What the test does:
> * sets up a HTTP server (Jetty) with N number of threads processing requests
> (MAX_CONNECTIONS constant).
> * sets up HttpClient with same N number of max connections
> (PoolingClientConnectionManager)
> * sets up X workers, trying to connect to the server at the same time.
> *Expected result*: although throughput is throttled (limited number of
> threads and connections), all workers should get successful response.
> *Actual result:* at least one of the workers will get
> "java.net.SocketTimeoutException: Read timed out" error.
> *Workaround:* limit HttpClient max connections to MAX_CONNECTIONS-1 and the
> test will pass.
> Seems to be some off-by-one bug somewhere in PoolingClientConnectionManager.
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