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vMotion fails with the error: Migration to host <> failed with error (1030267)



vMotion fails with Already disconnected or Timeout errors.


  • Example 1:

    Migration to host <> failed with error Already disconnected (195887150).
    VMotion [168362677:1280508768956681] write function failed.
    VMotion [168362677:1280508768956681] failed to flush channel: Already disconnected
    VMotion [168362677:1280508768956681] socket connected returned: Already disconnected

  • Example 2:

    Migration to host <> failed with error Timeout (195887137).
    VMotion [-1408234551:1280495981317190] write function failed.
    VMotion [-1408234551:1280495981317190] failed to send final vbuf: Timeout
    VMotion [-1408234551:1280495981317190] timed out waiting 20002 ms to transmit data.

  • Example 3:

    Migration to host <> failed with error Timeout (195887137).
    VMotion [171115571:1280406775498450] write function failed.
    VMotion [171115571:1280406775498450] failed to flush channel: Timeout
    VMotion [171115571:1280406775498450] timed out waiting 20001 ms to transmit data.
Network packet loss can cause random vMotion failures, significantly impacting vMotion's ability to succeed reliably. Retrying the vMotion operation may be successful, but VMware recommends that you follow this article to isolate and correct the problem.


The errors suggest that the destination host failed the vMotion prior to completion, which is likely caused by network issues.
To check the health of the vMotion network:
  • Check for IP address conflicts on the vMotion network. Each host in the cluster should have a vMotion vmknic, assigned a unique IP address.
  • Check for packet loss over the vMotion network. Try having the source host ping (vmkping) the destination host's vMotion vmknic IP address for the duration of the vMotion.
  • Check for the ability to pass traffic over the vMotion network. Consider whether jumbo frames are enabled on the VMkernel port, NIC, and Switch. Consider whether a firewall may be blocking vMotion traffic.
It is rare but possible that the source waited too long between page transmissions to the destination host. This can occur, for example, if there is a pending question for the virtual machine that requires user interaction prior to being able to migrate the virtual machine. Check that the virtual machine is running and responsive to input and that it is not waiting for administrator interaction in vCenter Server.
Alternatively, if the source host is heavily overcommitted, with slow or failing storage such that swap I/O could be delayed significantly (minutes per I/O), the destination may give up on the vMotion. That last case is extremely rare and is visible mainly during storage failovers.

See Also

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