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NFS datastore writing issues due to mismatch of MTU on Host and Storage Ports

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Applies to

  • NFS
  • ESXi
  • Linux

Issue

  • Linux mounted NFS share hangs during write operation but is accessible
  • ESXi mounted NFS datastores are accessible
  • New VMs can be created / storage vMotion VMs is successful, but after a few MBs are transferred, the transfer stops and after a few minutes there is a timeout error on the respective tasks:
    • vmkernel.log: APD state is maintained intermittently
2021-09-28T16:12:33.376Z cpu0:2098712)WARNING: NFS: 337: Lost connection to the server 172.27.143.110 mount point /netapp_test, mounted as 8b08cbd1-435c57cd-0000-000000000000 ("netapp_test")
2021-09-28T16:14:15.781Z cpu0:2098712)NFS: 346: Restored connection to the server 172.27.143.110 mount point /netapp_test, mounted as 8b08cbd1-435c57cd-0000-000000000000 ("netapp_test")
2021-09-28T16:14:15.781Z cpu6:2097603)StorageApdHandler: 507: APD exit event for 0x4314ef9fec20 [8b08cbd1-435c57cd]
2021-09-28T16:14:15.781Z cpu6:2097603)StorageApdHandlerEv: 117: Device or filesystem with identifier [8b08cbd1-435c57cd] has exited the All Paths Down state.
 

 

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