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    <title>topic Qlik Sense - SQL Server perodic connectivity issues in Connectivity &amp; Data Prep</title>
    <link>https://community.qlik.com/t5/Connectivity-Data-Prep/Qlik-Sense-SQL-Server-perodic-connectivity-issues/m-p/2081024#M12361</link>
    <description>&lt;P&gt;Hi,&amp;nbsp;&lt;/P&gt;
&lt;P&gt;We've been experiencing this issue sporadically for a long time however recently it's started happening every day and it is causing major issues for our dashboards.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Simply put, the connection between Qlik and SQL seems to come and go.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;The connection definitely works because it does run fine sometimes, I can't find out what is triggering the issue.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;The error we get is:&lt;/P&gt;
&lt;P&gt;Error: Connector connect error: IDataInitialize::GetDataSource. HRESULT = 80004005. ErrorSource: Microsoft OLE DB Provider for SQL Server, ErrorMsg: [DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied.&lt;BR /&gt;&lt;BR /&gt;&lt;/P&gt;
&lt;P&gt;As I say, the message is not reflective of the issue as it could be 2 mins later and it's working again.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;When it's down, it doesn't run in tasks and can't connect via the connection panel in the script editor.&lt;/P&gt;
&lt;P&gt;We do have a lot of tasks running, some which take a while so i'm not sure if it's being 'overwhelmed'&lt;/P&gt;
&lt;P&gt;I don't know too much about the backend of Qlik, but I don't think it's anything to do with versions/34 bit...but I have no idea.&lt;/P&gt;
&lt;P&gt;I've also spoken to the IT department but they assure me nothing is happening on the server at the times this happens&lt;/P&gt;
&lt;P&gt;Several of the apps which generate most of the QVDs are failing lately, which means that I have to keep trying to reload and checking if the connection is back up. We have a lot of external client dashboards so it's vital we fix this.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Thanks in advance&lt;/P&gt;</description>
    <pubDate>Wed, 07 Jun 2023 09:30:56 GMT</pubDate>
    <dc:creator>VW</dc:creator>
    <dc:date>2023-06-07T09:30:56Z</dc:date>
    <item>
      <title>Qlik Sense - SQL Server perodic connectivity issues</title>
      <link>https://community.qlik.com/t5/Connectivity-Data-Prep/Qlik-Sense-SQL-Server-perodic-connectivity-issues/m-p/2081024#M12361</link>
      <description>&lt;P&gt;Hi,&amp;nbsp;&lt;/P&gt;
&lt;P&gt;We've been experiencing this issue sporadically for a long time however recently it's started happening every day and it is causing major issues for our dashboards.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Simply put, the connection between Qlik and SQL seems to come and go.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;The connection definitely works because it does run fine sometimes, I can't find out what is triggering the issue.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;The error we get is:&lt;/P&gt;
&lt;P&gt;Error: Connector connect error: IDataInitialize::GetDataSource. HRESULT = 80004005. ErrorSource: Microsoft OLE DB Provider for SQL Server, ErrorMsg: [DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied.&lt;BR /&gt;&lt;BR /&gt;&lt;/P&gt;
&lt;P&gt;As I say, the message is not reflective of the issue as it could be 2 mins later and it's working again.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;When it's down, it doesn't run in tasks and can't connect via the connection panel in the script editor.&lt;/P&gt;
&lt;P&gt;We do have a lot of tasks running, some which take a while so i'm not sure if it's being 'overwhelmed'&lt;/P&gt;
&lt;P&gt;I don't know too much about the backend of Qlik, but I don't think it's anything to do with versions/34 bit...but I have no idea.&lt;/P&gt;
&lt;P&gt;I've also spoken to the IT department but they assure me nothing is happening on the server at the times this happens&lt;/P&gt;
&lt;P&gt;Several of the apps which generate most of the QVDs are failing lately, which means that I have to keep trying to reload and checking if the connection is back up. We have a lot of external client dashboards so it's vital we fix this.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Thanks in advance&lt;/P&gt;</description>
      <pubDate>Wed, 07 Jun 2023 09:30:56 GMT</pubDate>
      <guid>https://community.qlik.com/t5/Connectivity-Data-Prep/Qlik-Sense-SQL-Server-perodic-connectivity-issues/m-p/2081024#M12361</guid>
      <dc:creator>VW</dc:creator>
      <dc:date>2023-06-07T09:30:56Z</dc:date>
    </item>
    <item>
      <title>Re: Qlik Sense - SQL Server perodic connectivity issues</title>
      <link>https://community.qlik.com/t5/Connectivity-Data-Prep/Qlik-Sense-SQL-Server-perodic-connectivity-issues/m-p/2084299#M12386</link>
      <description>&lt;P&gt;Hi&amp;nbsp;&lt;a href="https://community.qlik.com/t5/user/viewprofilepage/user-id/193390"&gt;@VW&lt;/a&gt;&amp;nbsp;,&lt;/P&gt;
&lt;P&gt;Maybe have a look at this article.&lt;BR /&gt;&lt;A href="https://support.qlik.com/articles/000054843" target="_blank"&gt;Application Reload on RIM node fails with error: "ErrorSource: Microsoft OLE DB Provider for SQL Server, ErrorMsg: [DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied" but works when reloaded on Central Node (qlik.com)&lt;/A&gt;&lt;/P&gt;
&lt;P&gt;I would also suggest to run your tasks with retries.&lt;/P&gt;
&lt;P&gt;or&amp;nbsp;&lt;/P&gt;
&lt;P&gt;try NoLock on your SQL Select&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Thu, 15 Jun 2023 12:41:41 GMT</pubDate>
      <guid>https://community.qlik.com/t5/Connectivity-Data-Prep/Qlik-Sense-SQL-Server-perodic-connectivity-issues/m-p/2084299#M12386</guid>
      <dc:creator>williejacobs</dc:creator>
      <dc:date>2023-06-15T12:41:41Z</dc:date>
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