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https://issues.apache.org/jira/browse/HTTPCLIENT-2314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17803936#comment-17803936
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Philip Helger commented on HTTPCLIENT-2314:
-------------------------------------------
I think the problem is in this debug log in PoolingHttpClientConnectionManager:
{color:#000000} {color}{color:#7f0055}if{color}{color:#000000}
({color}{color:#0000c0}LOG{color}{color:#000000}.isDebugEnabled()) {{color}
{color:#000000}
{color}{color:#0000c0}LOG{color}{color:#000000}.debug({color}{color:#2a00ff}"{}
connection is not kept alive(isConsistent:{})"{color}{color:#000000},
ConnPoolSupport.{color}{color:#000000}getId{color}{color:#000000}({color}{color:#6a3e3e}endpoint{color}{color:#000000}),
{color}{color:#6a3e3e}conn{color}{color:#000000}.isConsistent());{color}
{color:#000000} }{color}
Because "conn" is null.
Trying to create a PR on the 5.3.x branch
> IllegalStateException: Endpoint is not connected
> ------------------------------------------------
>
> Key: HTTPCLIENT-2314
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2314
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient (classic)
> Affects Versions: 5.2, 5.3
> Reporter: Philip Helger
> Priority: Minor
> Fix For: 5.3.1
>
> Attachments: debuglog-httpclient-2314.txt, httpclient-2314-1.txt,
> httpclient-2314-2.txt
>
>
> Using `PoolingHttpClientConnectionManager`, under high traffic situations it
> occurs consistently that the exception "Endpoint is not connected" is invoked.
>
> The full stacktrace looks like this:
> {{Caused by: java.lang.IllegalStateException: Endpoint is not connected}}
> {{ at org.apache.hc.core5.util.Asserts.check(Asserts.java:38)
> ~[httpcore5-5.2.4.jar:5.2.4]}}
> {{ at
> org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager$InternalConnectionEndpoint.getValidatedPoolEntry(PoolingHttpClientConnectionManager.java:664)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager$InternalConnectionEndpoint.setSocketTimeout(PoolingHttpClientConnectionManager.java:697)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.InternalExecRuntime.execute(InternalExecRuntime.java:211)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.MainClientExec.execute(MainClientExec.java:116)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ConnectExec.execute(ConnectExec.java:188)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ProtocolExec.execute(ProtocolExec.java:192)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.HttpRequestRetryExec.execute(HttpRequestRetryExec.java:113)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ContentCompressionExec.execute(ContentCompressionExec.java:152)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.RedirectExec.execute(RedirectExec.java:116)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.InternalHttpClient.doExecute(InternalHttpClient.java:170)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.CloseableHttpClient.execute(CloseableHttpClient.java:245)
> ~[httpclient5-5.3.jar:5.3]}}
> {{ at
> org.apache.hc.client5.http.impl.classic.CloseableHttpClient.execute(CloseableHttpClient.java:188)
> ~[httpclient5-5.3.jar:5.3]}}
>
> Unfortunately I don't have a standalone example to reproduce it.
> Any suggestions for a workaround????
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