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https://issues.apache.org/jira/browse/HTTPCORE-718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17574234#comment-17574234
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Sajinie Kavindya commented on HTTPCORE-718:
-------------------------------------------
[~olegk],
So, according to the above explanation, could you please justify the below
observations as well?
* I have written a simple backend to send a chunked response along with the
*Connection: keep-alive* header. Just after sending the response, it closes the
connection.
* I have modified the NHttpClient class to send *two* consecutive requests to
the backend. Also, updated the pool properties as below and the connection
timeout to 30s. Also, removed the _ioReactor.shutdown();_ method at the end.
** pool.setDefaultMaxPerRoute(1);
pool.setMaxTotal(1);
* I have tried this in this latest 4.x.x branch (4.4.16-SNAPSHOT).
[^HttpNIOTestClient_new.zip]
I can see the below two behaviors.
# The second request fails with the ConnectionClosedException.
{code:java}
Backend server started!
server chunk size: 1412
server chunk size: 0
Closed the backend!
https://localhost:7005-> completed
https://localhost:7005->org.apache.http.ConnectionClosedException: Connection
is closed
{code}
# Sometimes, the second request fails with the SocketTimeoutException
{code:java}
Backend server started!
server chunk size: 1412
server chunk size: 0
Closed the backend!
https://localhost:7005-> completed
https://localhost:7005->java.net.SocketTimeoutException: 30,000 milliseconds
timeout on connection 127.0.0.1:52583<->127.0.0.1:7005
{code}
Please{*}{{*}} _*do not*_ consider this query as I'm reporting a bug
(regression). This is me trying to understand how the HttpCore works
internally. Kindly explain to me if I have done anything wrong here. Highly
appreciate your time!
Thanks,
Sajinie
> Getting org.apache.http.ConnectionClosedException after httpcore-nio version
> upgrade
> ------------------------------------------------------------------------------------
>
> Key: HTTPCORE-718
> URL: https://issues.apache.org/jira/browse/HTTPCORE-718
> Project: HttpComponents HttpCore
> Issue Type: Bug
> Components: HttpCore NIO
> Affects Versions: 4.4.15
> Environment: Java version: 11.0.15.1
> OS: macOS Monterey (Version 12.12.1)
> Reporter: Sajinie Kavindya
> Priority: Major
> Attachments: HttpNIOTestClient-1.zip, HttpNIOTestClient.zip,
> HttpNIOTestClient_new.zip
>
>
> We recently migrated to httpcore-nio 4.4.15 and we have been encountering
> some issues when connecting to an HTTPS Backend that sends chunked responses.
> The backend behaves in such a manner that when it sends the response, it
> immediately closes the connection after completion.
> We have attached a reproducer to this ticket and the behavior is as below.
> When httpcore-nio 4.4.15 is used, the client gets the error:
> {code:java}
> org.apache.http.ConnectionClosedException: Connection closed
> unexpectedly{code}
> But, when httpcore-nio 4.4.5 is used, the client receives the complete
> response, which was sent from the backend.
> We further checked on the following versions and the observations are as
> below.
> * httpcore-nio 4.4.10 - receives the complete response
> * httpcore-nio 4.4.11 - receives org.apache.http.ConnectionClosedException
> In order to replicate the issue, we did a few changes to the
> consumeContent(final ContentDecoder decoder) method inside the
> SimpleInputBuffer class. You may find the changes in the attached source code.
> In order to test the behavior, please run the Main class:
> “{*}TestChunkedBackend{*}”.
> Tested environment:
> * Java version: 11.0.15.1
> * OS: macOS Monterey (Version 12.12.1)
> A similar issue can be found here
> [https://issues.apache.org/jira/browse/HTTPCORE-706|http://example.com]
> Thanks & Regards,
> Sajinie
>
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