Virtual Machine File System I/O operations time out
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Virtual Machine File System I/O operations time out


Article ID: 340302


Updated On:


VMware vCenter Server VMware vSphere ESXi


A storage or network problem interrupts access to the VMware VMFS volume. The VMFS heartbeat cannot connect to the volume and times out. Other hosts accessing the same VMFS volume might break on-disk locks held by this host.


A VMFS datastore, datastore-1, resides on a SAN LUN. HostA connects to the SAN through a Fibre Channel when an outage occurs on the Fibre Channel switch port that HostA is connected to. HostA can no longer access the LUN. Individual VMFS heartbeat I/Os against datastore-1 time out. The host's lease on the volume expires after 16 seconds. At this point the heartbeat is declared to be timed out, and the administrator receives this event.


Virtual machine I/O against the datastore times out. Virtual machine power operations for VMs residing on the datastore will time out or fail.


VMware vCenter Server 6.5.x
VMware vSphere ESXi 6.5


Resolve the network or storage issue.