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Linux Virtual Delivery Agent
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Fixed issues

November 28, 2024
Contributed by: 
C C B

The Linux Virtual Delivery Agent 2411 includes the following fixed issues:

  • Root users are unable to copy read-only files to client devices mapped using CDM. [CVADHELP-25124]

  • The group policy parser might consume 100% CPU when handling huge group policy sets from a GPF file. [CVADHELP-25323]

  • The ctxnsap process exits unexpectedly when sessions disconnect, preventing the Citrix Application Delivery Management (ADM) from displaying HDX insight information. [CVADHELP-25493]

  • Incorrect ad_join.sh execution on the template machine can generate a flag called mcs_setting_flag that prevents newly MCS-created machines from joining a domain. This fix introduces a check in the deploymcs.sh script to identify and remove the flag when detected. [CVADHELP-25117]

  • The smart card service leaks file descriptors during smart card authentication, leading to a blockage of new smart card access. This issue occurs because, by default, most Linux distributions limit the maximum number of open files to 1,024 for each process. When the smart card service exhausts this limit, it can no longer establish new connections, effectively blocking subsequent smart card access.

    This issue affects VDAs with smart card logon enabled. Symptoms include numerous Failed to accept new connection: Too many open files errors in /var/log/xdl/hdx.log and an accumulation of file descriptors in /proc/${pid}/fd/, where ${pid} represents the process ID of ctxscardsd. To determine the PID, use the command systemctl status ctxscardsd|grep PID.

    To mitigate this issue, you can either increase the maximum open files limit for the smart card service or restart the smart card service. Ensure that there are no active sessions before attempting to restart the service. Use the following commands to increase the limit or restart the service:

    • To restart the smart card service:

       systemctl restart ctxscardsd
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    • To query the current service max open files:

       cat /proc/${PID}/limits
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    • To set the maximum open files for the smart card service:

      1. Open the ctxscardsd.service file in read-only mode to check the current settings:

        vim -R /lib/systemd/system/ctxscardsd.service
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      2. Add the following line to the Service section in ctxscardsd.service to increase the limit:

        LimitNOFILE=65536
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      3. Reload the systemd daemon and restart the ctxscardsd service:

        systemctl daemon-reload
systemctl restart ctxscardsd
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      4. Verify the new limit:

        cat /proc/${PID}/limits
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    Note:

    Increasing the max open files can extend the time before running out of file descriptors, but a restart of ctxscardsd might still be necessary eventually.

    [LNXVDA-17768]

  • Audio plug-and-play is not supported, requiring users to connect an audio capture device to the client machine before starting to record audio in the ICA session. Attaching a capture device after the audio recording application has started might cause the application to become unresponsive, necessitating a restart. Similarly, unplugging the capture device while recording might result in the same issue. This issue is resolved with the introduction of the multiple audio device support feature, which is enabled by default in versions 2411 and later.

Fixed issues
November 28, 2024
Contributed by: 
C C B
November 28, 2024
Contributed by: 
C C B

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