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Posted to dev@hc.apache.org by "Chris Ridd (Jira)" <ji...@apache.org> on 2021/09/09 11:06:00 UTC
[jira] [Updated] (HTTPCORE-685) I/O dispatch threads spin after
lots of TLSv1.3 connections
[ https://issues.apache.org/jira/browse/HTTPCORE-685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chris Ridd updated HTTPCORE-685:
--------------------------------
Environment: java-11-openjdk-11.0.12.0.7-0.el8_4.x86_64 (11.0.2.12+7-LTS on Centos 8). (was: java-11-openjdk-11.0.12.0.7-0.el8_4.x86_64 (11.0.2.12+7-LTS).)
> I/O dispatch threads spin after lots of TLSv1.3 connections
> -----------------------------------------------------------
>
> Key: HTTPCORE-685
> URL: https://issues.apache.org/jira/browse/HTTPCORE-685
> Project: HttpComponents HttpCore
> Issue Type: Bug
> Components: HttpCore NIO
> Affects Versions: 4.4.13, 4.4.14
> Environment: java-11-openjdk-11.0.12.0.7-0.el8_4.x86_64 (11.0.2.12+7-LTS on Centos 8).
> Reporter: Chris Ridd
> Priority: Major
> Attachments: AsyncExample.java, SyncExample.java
>
>
> When I run a Qualys VMDR scan against your example {{NHttpFileServer}} server, which is adjusted to only allow TLSv1.3, I see the two I/O-dispatch threads spinning, and a number of sockets (~20) never closing.
> The adjusted example code is attached: [^AsyncExample.java]
> The I/O dispatch threads are consistently inside {{SSLIOSession.doHandshake()}} and handshaking is {{true}} and HandshakeStatus is {{NOT_HANDSHAKING}}. The threads seem to enter this code for every "bad" connection, and then repeat it all over again making no progress and keeping the sockets open.
> As far as I see - the Qualys tests are sadly not open source - Qualys is just doing ~ 2000 HTTPS GET requests with different paths, apparently looking for known insecure applications. It is unclear what's special about the failing connections.
> If I run the [^SyncExample.java] server instead, the scan completes successfully.
> If you can suggest any instrumentation that will gain some insights on this problem, I will be happy to assist.
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