SharePoint 2013 – NodeRunnerQuery and NodeRunnerAdmin – SQL access errors

Issue

In ULS Logs, you get these errors in loop:

  • Unable to get sql session to admin database
  • NerioCluster: No lease returned when reading DB

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Solution

Search Host controller Service is started but no search application exist in farm.

You need either to create a search application or stop this service from Central administration:

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