KNOWLEDGE BASE

Cannot Connect To Data Source Due To A Permission Error On /dev/shm


Published: 14 Jul 2020
Last Modified Date: 15 Jul 2020

Issue

When opening a view, the following error shows connecting to the data source failed.
"Access Denied opening semaphore. This is typically caused by incorrect permissions on /dev/shm. Try ''sudo chmod 1777 /dev/shm' and retry."

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Environment

  • Tableau Server
  • Linux

Resolution

1. Run the following command on every node of Tableau Server.

   sudo chmod 1777 /dev/shm

2. Re-open the target view from URL link.

 

Cause

Failed to open semaphore and it is caused by the lack of permission to '/dev/shm' directory.
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