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    <title>topic Re: Notebook Server - Unable to validate runtime in ArcGIS Enterprise Questions</title>
    <link>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1678774#M43688</link>
    <description>&lt;P&gt;&lt;STRONG&gt;Update:&lt;/STRONG&gt; The issue was not setting&amp;nbsp;"&lt;EM&gt;containerd-snapshotter&lt;/EM&gt;" explicitly to "&lt;EM&gt;false&lt;/EM&gt;" in /etc/docker/daemon.json.&lt;/P&gt;&lt;P&gt;Since the release of &lt;A href="https://docs.docker.com/engine/release-notes/29/#2915:~:text=containerd%20image%20store%20is%20now%20the%20default%20for%20fresh%20installs" target="_self"&gt;Docker Engine 29.X&amp;nbsp;containerd-snapshotter is enabled by default&lt;/A&gt;, thus breaking the registration of runtime images in Notebook Server for Enterprise 11.5. Setting&amp;nbsp;containerd-snapshotter to false is only mentioned in the &lt;A href="https://enterprise.arcgis.com/en/notebook/latest/install/linux/install-docker-for-arcgis-notebook-server.htm#:~:text=containerd%2Dsnapshotter" target="_self"&gt;latest documentation of ArcGIS Notebook Server for Linux (Version 12.0)&lt;/A&gt;.&lt;/P&gt;</description>
    <pubDate>Tue, 20 Jan 2026 16:48:37 GMT</pubDate>
    <dc:creator>LennardLux</dc:creator>
    <dc:date>2026-01-20T16:48:37Z</dc:date>
    <item>
      <title>Notebook Server - Unable to validate runtime</title>
      <link>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1400016#M39052</link>
      <description>&lt;P&gt;Running ArcGIS Enterprise 11.1 on Windows, Notebook Server is using Linux containers and a standard license. I have ran through all the pre-reqs - docker desktop w/ linux contains and hyper-v, downloaded linux images from MyEsri, and installed using the postinstallutiltiy.bat which succeeded.&amp;nbsp;&lt;/P&gt;&lt;P&gt;Running &lt;STRONG&gt;&lt;FONT face="courier new,courier"&gt;docker image ls&lt;/FONT&gt;&lt;/STRONG&gt; on my notebook server returns the following:&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="tigerwoulds_0-1711222865243.png" style="width: 400px;"&gt;&lt;img src="https://community.esri.com/t5/image/serverpage/image-id/98889i966411E32B01193B/image-size/medium?v=v2&amp;amp;px=400" role="button" title="tigerwoulds_0-1711222865243.png" alt="tigerwoulds_0-1711222865243.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;When attempting to open any notebook I get this error. When I try to validate the standard runtime through notebook/admin, &lt;STRONG&gt;&lt;FONT face="courier new,courier"&gt;runtimeexists&lt;/FONT&gt; &lt;/STRONG&gt;is false.&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="tigerwoulds_2-1711222979716.png" style="width: 400px;"&gt;&lt;img src="https://community.esri.com/t5/image/serverpage/image-id/98891i4BB179C816E9C0AA/image-size/medium?v=v2&amp;amp;px=400" role="button" title="tigerwoulds_2-1711222979716.png" alt="tigerwoulds_2-1711222979716.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;LI-CODE lang="javascript"&gt;{
    "machines": [{
        "machine": "[REDACTED]",
        "notebookRuntimes": [
            {
                "notebookRuntimeName": "ArcGIS Notebook Python 3 Standard",
                "runtimeExists": "false",
                "notebookRuntimeVersion": "8.0"
            },
            {
                "notebookRuntimeName": "ArcGIS Notebook Python 3 Advanced",
                "runtimeExists": "false",
                "notebookRuntimeVersion": "8.0"
            }
        ]
    }],
    "status": "success"
}&lt;/LI-CODE&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Any ideas or other steps I need to take to have notebook server validate the standard runtime?&lt;/P&gt;</description>
      <pubDate>Sat, 23 Mar 2024 21:36:42 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1400016#M39052</guid>
      <dc:creator>tigerwoulds</dc:creator>
      <dc:date>2024-03-23T21:36:42Z</dc:date>
    </item>
    <item>
      <title>Re: Notebook Server - Unable to validate runtime</title>
      <link>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1400072#M39053</link>
      <description>&lt;P&gt;Navigate to Notebook Administrator Directory &amp;gt; notebooks &amp;gt; runtimes and confirm the image ID matches the one in your error.&lt;/P&gt;&lt;P&gt;You mentioned downloading the Linux containers and images. I understand that Docker is native to Linux, but I still downloaded the the docker container images from the Windows section of My Esri. They probably aren't different in any way though since they have the same checksum.&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="TimoT_0-1711275909815.png" style="width: 400px;"&gt;&lt;img src="https://community.esri.com/t5/image/serverpage/image-id/98910iEB40B2BB1C8620B7/image-size/medium?v=v2&amp;amp;px=400" role="button" title="TimoT_0-1711275909815.png" alt="TimoT_0-1711275909815.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;Good luck.&lt;/P&gt;&lt;P&gt;Timo&lt;/P&gt;</description>
      <pubDate>Sun, 24 Mar 2024 10:28:16 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1400072#M39053</guid>
      <dc:creator>TimoT</dc:creator>
      <dc:date>2024-03-24T10:28:16Z</dc:date>
    </item>
    <item>
      <title>Re: Notebook Server - Unable to validate runtime</title>
      <link>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1400528#M39060</link>
      <description>&lt;P&gt;Hey Tim, thanks for the response. I did confirm Image ID matches and used the same container download from your screenshot (those are infact linux container images). I ended up resolving the issue by going to Notebook Server Admin &amp;gt; System &amp;gt; Properties and setting the&amp;nbsp;useWindowsContainers&amp;nbsp;property to false. I then went to Notebook &amp;gt; Runtimes and restored the factory runtimes. We're running Windows Server 2022 and these additional steps are required.&lt;/P&gt;&lt;P&gt;This is mentioned in the doc but oddly enough, only on the welcome page:&amp;nbsp;&lt;A href="https://enterprise.arcgis.com/en/notebook/11.1/install/windows/welcome-to-the-arcgis-notebook-server-install-guide.htm" target="_blank"&gt;https://enterprise.arcgis.com/en/notebook/11.1/install/windows/welcome-to-the-arcgis-notebook-server-install-guide.htm&lt;/A&gt;&lt;/P&gt;</description>
      <pubDate>Mon, 25 Mar 2024 19:31:24 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1400528#M39060</guid>
      <dc:creator>tigerwoulds</dc:creator>
      <dc:date>2024-03-25T19:31:24Z</dc:date>
    </item>
    <item>
      <title>Re: Notebook Server - Unable to validate runtime</title>
      <link>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1401634#M39079</link>
      <description>&lt;P&gt;&lt;SPAN&gt;In ArcGIS Enterprise version 11.2, the same thing happened to me. The error was resolved by following these instructions. Thank you very much.&lt;/SPAN&gt;&lt;/P&gt;</description>
      <pubDate>Wed, 27 Mar 2024 19:08:56 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1401634#M39079</guid>
      <dc:creator>IngJuanMaSuarez</dc:creator>
      <dc:date>2024-03-27T19:08:56Z</dc:date>
    </item>
    <item>
      <title>Re: Notebook Server - Unable to validate runtime</title>
      <link>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1678740#M43687</link>
      <description>&lt;P&gt;I encountered the same issue, but with ArcGIS Enterprise 11.5 under Linux Ubuntu 24.04 (single-machine deployment).&lt;/P&gt;&lt;P&gt;These are the notebook images in the docker registry (&lt;EM&gt;docker image ls):&lt;/EM&gt;&lt;/P&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="LennardLux_0-1768917165213.png" style="width: 757px;"&gt;&lt;img src="https://community.esri.com/t5/image/serverpage/image-id/146962i920E5C9C49A35076/image-dimensions/757x53?v=v2" width="757" height="53" role="button" title="LennardLux_0-1768917165213.png" alt="LennardLux_0-1768917165213.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;The registered Notebook Runtimes under &amp;lt;FQDN&amp;gt;/notebook/admin/notebooks/runtimes have different image IDs compared to the images in the docker registry. Thus, they are flagged with "runtimeExists" : "false" when validating the runtimes (&lt;EM&gt;notebook/admin/notebooks/runtimes/register):&lt;/EM&gt;&lt;/P&gt;&lt;LI-CODE lang="c"&gt;[{
  "machine": "[REDACTED]",
  "notebookRuntimes": [
    {
      "notebookRuntimeName": "ArcGIS Notebook Python 3 Standard",
      "runtimeExists": "false",
      "notebookRuntimeVersion": "12.0"
    },
    {
      "notebookRuntimeName": "ArcGIS Notebook Python 3 Advanced",
      "runtimeExists": "false",
      "notebookRuntimeVersion": "12.0"
    }
  ]
}]&lt;/LI-CODE&gt;&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="LennardLux_1-1768917269936.png" style="width: 782px;"&gt;&lt;img src="https://community.esri.com/t5/image/serverpage/image-id/146963iFF5CC3234FC15A48/image-dimensions/782x88?v=v2" width="782" height="88" role="button" title="LennardLux_1-1768917269936.png" alt="LennardLux_1-1768917269936.png" /&gt;&lt;/span&gt;&lt;/P&gt;&lt;P&gt;I downloaded the Images specifically for Linux. Restoring the factory runtimes does not work, it only changes the Image IDs of the already registered runtimes, and are not equal to the ones found in the local Docker registry still.&lt;/P&gt;&lt;P&gt;Registering the Notebook Runtimes from the docker registry manually works, but that is not what the Postinstallation Utility script intends.&amp;nbsp;&lt;/P&gt;&lt;P&gt;Has anyone had the same issue and found a solution? So far I can only speculate what is going wrong. Maybe it is the Docker Configuration or the configuration of the Reverse Proxy? If someone has an idea I'd be happy and thankful to exchange some information!&lt;/P&gt;</description>
      <pubDate>Tue, 20 Jan 2026 13:57:33 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1678740#M43687</guid>
      <dc:creator>LennardLux</dc:creator>
      <dc:date>2026-01-20T13:57:33Z</dc:date>
    </item>
    <item>
      <title>Re: Notebook Server - Unable to validate runtime</title>
      <link>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1678774#M43688</link>
      <description>&lt;P&gt;&lt;STRONG&gt;Update:&lt;/STRONG&gt; The issue was not setting&amp;nbsp;"&lt;EM&gt;containerd-snapshotter&lt;/EM&gt;" explicitly to "&lt;EM&gt;false&lt;/EM&gt;" in /etc/docker/daemon.json.&lt;/P&gt;&lt;P&gt;Since the release of &lt;A href="https://docs.docker.com/engine/release-notes/29/#2915:~:text=containerd%20image%20store%20is%20now%20the%20default%20for%20fresh%20installs" target="_self"&gt;Docker Engine 29.X&amp;nbsp;containerd-snapshotter is enabled by default&lt;/A&gt;, thus breaking the registration of runtime images in Notebook Server for Enterprise 11.5. Setting&amp;nbsp;containerd-snapshotter to false is only mentioned in the &lt;A href="https://enterprise.arcgis.com/en/notebook/latest/install/linux/install-docker-for-arcgis-notebook-server.htm#:~:text=containerd%2Dsnapshotter" target="_self"&gt;latest documentation of ArcGIS Notebook Server for Linux (Version 12.0)&lt;/A&gt;.&lt;/P&gt;</description>
      <pubDate>Tue, 20 Jan 2026 16:48:37 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1678774#M43688</guid>
      <dc:creator>LennardLux</dc:creator>
      <dc:date>2026-01-20T16:48:37Z</dc:date>
    </item>
    <item>
      <title>Re: Notebook Server - Unable to validate runtime</title>
      <link>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1691203#M43931</link>
      <description>&lt;P&gt;Hej&amp;nbsp;&lt;a href="https://community.esri.com/t5/user/viewprofilepage/user-id/927932"&gt;@LennardLux&lt;/a&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Did you run the postinstall after the Docker settings where changed?&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Wed, 18 Mar 2026 08:20:31 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1691203#M43931</guid>
      <dc:creator>MortenMartinsen</dc:creator>
      <dc:date>2026-03-18T08:20:31Z</dc:date>
    </item>
    <item>
      <title>Re: Notebook Server - Unable to validate runtime</title>
      <link>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1691204#M43932</link>
      <description>&lt;P&gt;Hi Morten, it's been a while, but iirc i re-installed the entire system/server to make sure this was the only issue.&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Wed, 18 Mar 2026 08:24:07 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1691204#M43932</guid>
      <dc:creator>LennardLux</dc:creator>
      <dc:date>2026-03-18T08:24:07Z</dc:date>
    </item>
    <item>
      <title>Re: Notebook Server - Unable to validate runtime</title>
      <link>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1691207#M43933</link>
      <description>&lt;P&gt;&lt;a href="https://community.esri.com/t5/user/viewprofilepage/user-id/927932"&gt;@LennardLux&lt;/a&gt;&amp;nbsp; it worked! Thanks&lt;/P&gt;</description>
      <pubDate>Wed, 18 Mar 2026 09:50:09 GMT</pubDate>
      <guid>https://community.esri.com/t5/arcgis-enterprise-questions/notebook-server-unable-to-validate-runtime/m-p/1691207#M43933</guid>
      <dc:creator>MortenMartinsen</dc:creator>
      <dc:date>2026-03-18T09:50:09Z</dc:date>
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