vCenter Log Insight not receiving syslogs from ESXi hosts

Summary:

This appears to occur under very specific circumstances. There is a KB and it is also noted Log Insight's troubleshooting section of their documentation.

Rather than regurgitate all the same information is here is the gist:
  1. Occurs when log insight services are restarted
  2. Affects ESXi 5.0.x/5.1.x when using TCP and 5.0 U1 and earlier over UDP.
  3. Does not affect 5.0 U2 and newer when using UDP.
Here is the table:



Communication ProtocolAffected ESXi Version
TCP

  • ESXi 5.0.x
  • ESXi 5.1.x
  • UDP
    • ESXi 5.0 and 5.0 U1

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