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https://issues.apache.org/jira/browse/HTTPCLIENT-2282?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oleg Kalnichevski resolved HTTPCLIENT-2282.
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Fix Version/s: (was: Stuck)
Resolution: Won't Fix
> Handle java.net.SocketException: Connection reset more gracefully
> -----------------------------------------------------------------
>
> Key: HTTPCLIENT-2282
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2282
> Project: HttpComponents HttpClient
> Issue Type: Improvement
> Components: HttpClient (classic)
> Affects Versions: 4.5.14
> Reporter: Konrad Windszus
> Priority: Major
> Labels: volunteers-wanted
>
> Currently in edge cases the retry mechanism leveraging
> DefaultHttpRequestRetryHandler does not catch "Connection reset" exceptions.
> This is caused by
> # A connection pool which keeps the connections alive for too long
> # The reduced default validation of connections in
> [https://hc.apache.org/httpcomponents-client-4.5.x/current/httpclient/apidocs/org/apache/http/impl/conn/PoolingHttpClientConnectionManager.html:]
> "The code now only checks the connection if the elapsed time since the last
> use of the connection exceeds the timeout that has been set. The default
> timeout is set to 2000ms"
> The error scenario is as follows:
> # A client opens a number of connection almost in parallel which exceed the
> number of retries
> # then the connections are reused shortly before they are closed silently by
> some proxy or the server.
> # Now the client tries to reuse those but runs into the "Connection reset"
> issue. Although it will retry through DefaultHttpRequestRetryHandler 3
> different pooled connections they all suffer from the fact that they are not
> longer accepted (and therefore throw the same SocketException).
> Maybe one could improve the resilience by calling
> [https://hc.apache.org/httpcomponents-client-4.5.x/current/httpclient/apidocs/org/apache/http/impl/conn/PoolingHttpClientConnectionManager.html#setValidateAfterInactivity(int])
> with 0 on the underlying connection pool manager until a connection is
> successfully established to that host again.
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