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https://issues.apache.org/jira/browse/HTTPCLIENT-2328?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17876251#comment-17876251
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ASF subversion and git services commented on HTTPCLIENT-2328:
-------------------------------------------------------------
Commit ee0a102104d03a8d1cfe18e571d179c41242182c in httpcomponents-client's
branch
refs/heads/dependabot/maven/com.googlecode.maven-download-plugin-download-maven-plugin-1.9.0
from Oleg Kalnichevski
[ https://gitbox.apache.org/repos/asf?p=httpcomponents-client.git;h=ee0a10210 ]
HTTPCLIENT-2328: Blocking i/o connections to check if the opposite TLS endpoint
has been closed by the opposite endpoint while writing out request body
> Request hangs if TLS 1.3 connection is half-closed
> ---------------------------------------------------
>
> Key: HTTPCLIENT-2328
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2328
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient (classic)
> Affects Versions: 4.5.14, 5.3.1
> Reporter: Zoe Wang
> Priority: Minor
> Fix For: 5.4-beta1
>
> Attachments: HalfCloseApache5Client.Java, HalfCloseServer.java,
> TlsHalfCloseApache4.java, keystore.jks
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> If a server with TLS 1.3 support closes the connection during the request,
> more specifically, sending close_notify while the client is still writing to
> socket, the request will hang indefinitely. It's not an issue with TLS 1.2
> because it uses duplex-close policy. With TLS 1.3's half-closed connection
> policy, it seems Apache HTTP client is not able to detect connection closure
> properly. We are able to reproduce the issue with both 4.x and 5.x. I should
> note that HTTP URL connection does not have this issue.
> The workaround it to set `jdk.tls.acknowledgeCloseNotify` to true (see
> [https://bugs.openjdk.org/browse/JDK-8208526]), but that would require a lot
> of users to make changes on their side.
>
> Steps to repro:
> * Download the attached keystore file
> * Update ksPath in the server code HalfCloseServer.java to where you
> download the keystore
> * Run the server, the server will begin listening on {{localhost:8081}}
> * Create a random file of size 128MB and update client code "testFile" to
> where the file is.
> * Run the client, it should hang
> ** If System.setProperty("jdk.tls.acknowledgeCloseNotify", "true") is
> uncommented, it will not hang
> ** It also won’t hang if we we force TLS1.2
>
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