[Bug 1924298] Re: accept returns duplicate endpoints under load
I wrote to Ricardo Diaz & Eric Dumazet to ask if the patch for this bug would be backported and it looks like the fix was made for the Linux stable kernels very recently: https://www.spinics.net/lists/stable- commits/msg244651.html Eric Dumazet also mentioned that: "the bug only happens if networking configuration is not optimal. (We never hit the bug at Google) Normally, all packets for a given 4-tuple should be handled by the same cpu. On multi-queues NIC, RSS ensures this, if only one cpu is servicing interrupts for any receive queue. Otherwise, cpus compete over the same spinlocks, and could hit the race that Ricardo fixed. I suggest you also work on networking configuration, as this could help even without this race, but once flows are established." He suggested looking at `Documentation/networking/scaling.rst` as a starting point for tackling the network configuration. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
I wrote to Ricardo Diaz & Eric Dumazet to ask if the patch for this bug would be backported and it looks like the fix was made for the Linux stable kernels very recently: https://www.spinics.net/lists/stable- commits/msg244651.html Eric Dumazet also mentioned that: "the bug only happens if networking configuration is not optimal. (We never hit the bug at Google) Normally, all packets for a given 4-tuple should be handled by the same cpu. On multi-queues NIC, RSS ensures this, if only one cpu is servicing interrupts for any receive queue. Otherwise, cpus compete over the same spinlocks, and could hit the race that Ricardo fixed. I suggest you also work on networking configuration, as this could help even without this race, but once flows are established." He suggested looking at `Documentation/networking/scaling.rst` as a starting point for tackling the network configuration. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
Hi Mark, Thanks for the reply and confirmation. I was talking to a co-worker today about this bug and they pointed out that even though it is fixed in the newer Linux kernel versions, Ubuntu 20.04 and 16.04 are under LTS until April 2025 and April 2023 respectively. It might be good to leave this bug open to see if there is a way that Ubuntu can backport the fix for this issue to those versions. I think there is a good case to argue that they should consider doing this as the bug affects the reliability of TCP networking under load, however I don't know about the process for how Ubuntu bugs are triaged. Chris -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
Christopher, Thank-you for the work you have put into researching this. It is really appreciated. The system I originally used to reproduce this bug has since been updated to: linux-image-5.13.0-40-generic 5.13.0-40.45~20.04.1 I have just attempted to reproduce the issue and I have been unable to. That is consistent with your findings. I have also reviewed the git commit you identified and I agree that it is very likely that that commit fixed the bur reported here. I am going to update the error message reported by Apache Tomcat to update to the OS to a version that uses kernel 5.10 or greater. I would close this issue as fixed but I don't appear to have the necessary karma to do that. Thanks again for your extremely helpful research. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
After spending some time I think I have narrowed down the bug fix to Linux kernel 5.10-rc6. The bug reproed on Ubuntu with kernel 5.10-rc4 but not on 5.10-rc6. Here is a diff of the kernel sources between those two versions: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/diff/?id=v5.10-rc6=v5.10-rc4=2 Of note are some changes to `net/ipv4/inet_hashtables.c` Using `git blame` I think the most likely source of the bug fix was this commit by Ricardo Dias: https://github.com/torvalds/linux/commit/01770a166165738a6e05c3d911fb4609cc4eb416 The description for the commit describes a race condition which looks like it could cause the bug: "When such event happens, the TCP stack code has a race condition that occurs between the momement a lookup is done to the established connections hashtable to check for the existence of a connection for the same client, and the moment that the child socket is added to the established connections hashtable. As a consequence, this race condition can lead to a situation where we add two child sockets to the established connections hashtable and deliver two sockets to the userspace program to the same client." So for anyone who comes across this bug, the likely solution is to update your OS to a version which uses kernel 5.10 or greater. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
We have been hitting this bug quite often while running Tomcat 8.5 on Amazon AWS Linux 2 with a kernel of 4.14.268-205.500.amzn2.x86_64 I wanted to see if the bug could be reproduced using an updated kernel so I attempted to repro it using the server code and methodology provided by Mark Thomas on Ubuntu Server 21.10 (running on a Raspberry Pi 4 with 4GB RAM) and was NOT able to repro the bug (kernel 5.13.0-1008-raspi). I then installed Ubuntu Server 20.04 LTS on the same machine and WAS able to repro the bug (kernel 5.4.0-1052-raspi). The bug was fairly easy to repro and did not take multiple times to repro. Since then I have been able to repro the bug using the server code on AWS Linux 2 with the 4.14.268-205.500.amzn2.x86_64 kernel, but not on AWS Linux 2 with a 5.10.109-104.500.amzn2.x86_64 kernel. I think there is a slight problem with the server code used in the repro, as it is calling `pthread_create` with no thread attributes, which will create joinable threads instead of detached threads. The documentation for `pthread_create` says that "Only when a terminated joinable thread has been joined are the last of its resources released back to the system." Because the server code never joins the threads I think this is preventing the OS from releasing the thread resources. This results in the server eventually running out of memory and the server program returning a "pthread_create: Cannot allocate memory" as mentioned by Brooke Hedrick in their comment. I was also not able to repro the bug on WSL (kernel 4.4.0-19041-Microsoft), but perhaps their underlying network drivers are different? I also was running into this issue when running the server code. I made a slight modification to the server code to set the pthread attribute to create the new threads in a detached state. This seemed to solve the memory issue and I was able to repro the bug with this server. I've attached the code. Additionally, I found it useful to use `prlimit` to update the maximum number of open files for the server process, once it was running. This made the server less likely to run into an EMFILE error when calling `accept`. ** Attachment added: "Updated server to demonstrate bug" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1924298/+attachment/5582247/+files/server.c -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
I am impacted by this bug as well, as reported in my Tomcat 9-based application logs: [2022-04-18 21:45:44.764] ERROR [http-nio-9083-Acceptor ] org.apache.tomcat.util.net.Acceptor Socket accept failed java.io.IOException: Duplicate accept detected. This is a known OS bug. Please consider reporting that you are affected: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1924298 This app runs on AWS ECS Fargate v1.4 in a Ubuntu 18.04 amd64 based image using the BellSoft Liberica JRE 11. I get this log messages a couple times a day on average. The application continues running, seemingly without any problems. The ERROR log trigger alerts which we will adapt to ignore, but I wanted to add my experience with this issue here. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
Ohhh ... this was not intelligent at all, what I just wrote. (This reads like Spring has the issue and not the OS in my case ... although I believe the OS has the issue) Sorry for the confusion. If I can reproduce it I will. (Note: Editing/Deleting my prev. comment is not possible although at least the icons are there) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
Hi, I am pretty sure that this bug also effects me. Im running a Spring application on Ubuntu 20.04 It is not easy for me to execute the reproduce steps, because I only have limited access to the OS. The reason why I am pretty sure is because I have the same situation as described here for the spring framework: https://github.com/spring-projects/spring-framework/issues/26434 As a consequence when I update Spring Boot to 2.5 I have critical errors. If I do not update (stay with Spring Boot 2.4) I do not get this error. I want and need to update. Please reconsider fixing this bug. ** Bug watch added: github.com/spring-projects/spring-framework/issues #26434 https://github.com/spring-projects/spring-framework/issues/26434 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
Not sure if this is useful, but running the test with WSL and Ubuntu 20.04.3 LTS 2 "console windows" running the wrk at the same time. This is how the server failed Listening on port pthread_create: Cannot allocate memory I realize this is WSL and not native Windows. We have spent about 90 minutes working on porting from the server.c to run on Windows natively and haven't succeeded yet. We are not c/c++ developers, though. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
Thanks for taking the time to report this bug and helping to make Ubuntu better. We appreciate the difficulties you are facing, but this appears to be a "regular" (non-security) bug. I have unmarked it as a security issue since this bug does not show evidence of allowing attackers to cross privilege boundaries nor directly cause loss of data/privacy. Please feel free to report any other bugs you may find. ** Information type changed from Public Security to Public -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
We are seeing this error on Windows Server 2019 Jan 21, 2022 10:30:21 AM org.apache.tomcat.util.net.AprEndpoint setSocketOptions SEVERE: Error allocating socket processor java.io.IOException: Duplicate accept detected. This is a known OS bug. Please consider reporting that you are affected: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1924298 at org.apache.tomcat.util.net.AprEndpoint.setSocketOptions(AprEndpoint.java:811) at org.apache.tomcat.util.net.AprEndpoint.setSocketOptions(AprEndpoint.java:83) at org.apache.tomcat.util.net.Acceptor.run(Acceptor.java:149) at java.base/java.lang.Thread.run(Thread.java:829) Adoptium JDK jdk-11.0.13+8 64bit Apache Tomcat 9.0.56 tomcat-native-1.2.31 openssl-1.1.1l apr-1.7.0 apr-util-1.6.1 2022-01-21 09:58:59 Apache Commons Daemon procrun stdout initialized. Jan 21, 2022 9:59:01 AM org.apache.catalina.core.AprLifecycleListener lifecycleEvent INFO: Loaded Apache Tomcat Native library [1.2.31] using APR version [1.7.0]. Jan 21, 2022 9:59:01 AM org.apache.catalina.core.AprLifecycleListener lifecycleEvent INFO: APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true], UDS [true]. Jan 21, 2022 9:59:01 AM org.apache.catalina.core.AprLifecycleListener lifecycleEvent INFO: APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true] Jan 21, 2022 9:59:01 AM org.apache.catalina.core.AprLifecycleListener initializeSSL INFO: OpenSSL successfully initialized [OpenSSL 1.1.1l 24 Aug 2021] Jan 21, 2022 9:59:01 AM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["http-apr-0.0.0.0-x"] Jan 21, 2022 9:59:01 AM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["https-openssl-apr-0.0.0.0-x"] Jan 21, 2022 9:59:01 AM org.apache.tomcat.util.net.openssl.OpenSSLUtil getKeyManagers Jan 21, 2022 9:59:01 AM org.apache.catalina.startup.Catalina load INFO: Server initialization in [667] milliseconds Jan 21, 2022 9:59:01 AM org.apache.catalina.core.StandardService startInternal INFO: Starting service [Catalina] Jan 21, 2022 9:59:01 AM org.apache.catalina.core.StandardEngine startInternal INFO: Starting Servlet engine: [Apache Tomcat/9.0.56] AND We are seeing the error on Ubuntu 20.04.3 LTS Jan 21, 2022 8:55:02 AM org.apache.tomcat.util.net.AprEndpoint setSocketOptions SEVERE: Error allocating socket processor java.io.IOException: Duplicate accept detected. This is a known OS bug. Please consider reporting that you are affected: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1924298 at org.apache.tomcat.util.net.AprEndpoint.setSocketOptions(AprEndpoint.java:811) at org.apache.tomcat.util.net.AprEndpoint.setSocketOptions(AprEndpoint.java:83) at org.apache.tomcat.util.net.Acceptor.run(Acceptor.java:149) at java.base/java.lang.Thread.run(Thread.java:829) Jan 21, 2022 7:08:11 AM org.apache.catalina.core.AprLifecycleListener lifecycleEvent INFO: Loaded Apache Tomcat Native library [1.2.31] using APR version [1.7.0]. Jan 21, 2022 7:08:11 AM org.apache.catalina.core.AprLifecycleListener lifecycleEvent INFO: APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true], UDS [true]. Jan 21, 2022 7:08:11 AM org.apache.catalina.core.AprLifecycleListener lifecycleEvent INFO: APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true] Jan 21, 2022 7:08:11 AM org.apache.catalina.core.AprLifecycleListener initializeSSL INFO: OpenSSL successfully initialized [OpenSSL 1.1.1l 24 Aug 2021] Jan 21, 2022 7:08:11 AM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["http-apr-0.0.0.0-x"] Jan 21, 2022 7:08:11 AM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["https-openssl-apr-0.0.0.0-x"] Jan 21, 2022 7:08:11 AM org.apache.catalina.startup.Catalina load INFO: Server initialization in [463] milliseconds Jan 21, 2022 7:08:11 AM org.apache.catalina.core.StandardService startInternal INFO: Starting service [Catalina] Jan 21, 2022 7:08:11 AM org.apache.catalina.core.StandardEngine startInternal INFO: Starting Servlet engine: [Apache Tomcat/9.0.56] We do NOT see this issue logged, by Tomcat, on the same Windows or Linux O/S versions with DIFF AdoptOpenJDK 11.0.10+9 64bit DIFF Apache Tomcat 9.0.43 DIFF tomcat-native-1.2.26 DIFF openssl-1.1.1i SAME apr-1.7.0 SAME apr-util-1.6.1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
Amazon Linux is affected as well. Operating System: Amazon Linux 2 Kernel: Linux 4.14.256-197.484.amzn2.aarch64 Architecture: arm64 openjdk version "17" 2021-09-14 OpenJDK Runtime Environment Temurin-17+35 (build 17+35) OpenJDK 64-Bit Server VM Temurin-17+35 (build 17+35, mixed mode, sharing) Tomcat 9.0.56 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
** Also affects: linux Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
** Information type changed from Public to Public Security -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
Arch Linux is also affected. Operating System: Arch Linux KDE Plasma Version: 5.23.4 KDE Frameworks Version: 5.89.0 Qt Version: 5.15.2 Kernel Version: 5.15.12-arch1-1 (64-bit) Graphics Platform: X11 Processors: 8 × AMD Ryzen 5 2500U with Radeon Vega Mobile Gfx Memory: 14,6 GiB of RAM Graphics Processor: AMD Radeon Vega 8 Graphics I'm using Spring Boot 2.6.2 and: openjdk 17.0.1 2021-10-19 OpenJDK Runtime Environment (build 17.0.1+12) OpenJDK 64-Bit Server VM (build 17.0.1+12, mixed mode) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
CentOS version of this bug report: https://bugs.centos.org/view.php?id=18383 ** Bug watch added: bugs.centos.org/ #18383 https://bugs.centos.org/view.php?id=18383 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
I get the same issue on "CentOS Linux 7.9.2009 (Core)". My Spring (embedded tomcat application) throws the following message. 2021-12-25 08:38:31,250 ERROR | https-jsse-nio-18443-Acceptor | org.apache.tomcat.util.net.Acceptor | Socket accept failed java.io.IOException: Duplicate accept detected. This is a known OS bug. Please consider reporting that you are affected: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1924298 at org.apache.tomcat.util.net.NioEndpoint.serverSocketAccept(NioEndpoint.java:545) at org.apache.tomcat.util.net.NioEndpoint.serverSocketAccept(NioEndpoint.java:78) at org.apache.tomcat.util.net.Acceptor.run(Acceptor.java:129) at java.base/java.lang.Thread.run(Thread.java:833) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1924298] Re: accept returns duplicate endpoints under load
The issue has been reproduced on fully patched versions of Ubuntu 21.10 as well. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1924298 Title: accept returns duplicate endpoints under load To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1924298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
