To proceed with the operation to unmount or remove a datastore, ensure that the datastore is accessible, the host is reachable and its vSphere HA agent is running. I can check more tomorrow,, I may pwr down an ESXi host to see if the VMs move,,,The basic architecture for the vCLS control plane consists of maximum 3 virtual machines (VM), also referred to as system or agent VMs which are placed on separate hosts in a cluster. log file (Fault Domain Manager log) and check if there are errors related to vSphere High Availability. 0 Update 3 or when you have a new vSphere 7. ResolutionsWhen I try to migrate to any datastore, I receive the following message -. From the Type drop-down menu, select either Keep Virtual Machines Together (affinity) or Separate Virtual Machines (anti-affinity). It will maintain the health and services of that. Using vSphere HA with Distributed Resource Scheduler (DRS) combines automatic failover with load balancing. vCLS VMs failed to deploy on a 1 or 2 node vSAN cluster with the error:. A VMware vSphere Metro Storage Cluster configuration is a specific storage configuration that combines replication with array-based clustering. vCLS uses agent virtual machines to maintain cluster services health. VMware vSphere HA. When the prerequisite criteria are passed, click OK. vsphere HA Virtual Machine failover failed Hi, There are 3 ESX hosts in our cluster. vSphere HA protection will be restored when. 0 or later version. vSphere HA does not perform failovers. 0 Update 3 or when you have a new vSphere 7. However, with vSphere proactive HA, it allows you to configure certain actions for events that MAY lead to server failure. With dedicated failover hosts admission control, when a host fails, vSphere HA. We just want to migrate VM to the ESX host that just exit from. All Products; Beta Programs; Product Registration; Trial and Free Solutions. When you add the first three hosts to the cluster, vSphere Cluster Services (vCLS) agent virtual machines are added by default to the cluster. Click Finish. 0 Kudos Troy_Clavell. Expand the cluster where the orphaned vCLS VMs are located. Alarm name. Wait about 5 minutes for the vCLS VMs to be deleted. The Witness node becomes unavailable while the Passive node is trying to assume the role. I did not mention that SRM mounts datastores at protected site. Question #: 52. Other reasons could be network issues or problems with the vpxa service. Click the vSphere HA switcher to enable High Availability. Try to delete the datastore again. vCLS is upgraded as part of vCenter Server upgrade. The virtual machine violates failover when it attempts to power on. For every host on this new cluster, if i exit MM the vCLS vm attempts to deploy but fails with "No host is compatible with the virtual machine". After the host is back online, the VM stays offline and gets not powered up again! Code: Select all vCLS-98b596cf-d0d2-4cac-a45d-f39bf856e762: vSphere HA virtual machine failover failed vSphere HA failover operation in progress in cluster Cluster1 in datacenter XXXXXX: 0 VMs being restarted, 1 VMs waiting for a retry, 0 VMs waiting for resources, 0 inaccessible vSAN VMs You can configure vSphere HA to designate specific hosts as the failover hosts. Not always but sometimes we tend to see an alarm on a VM "vSphere HA virtual machine failover failed". A quorum of up to three vCLS agent virtual machines are required to run in a cluster, one agent virtual machine per host. Open the vCenter Object and navigate to Monitor > Issues and Alarms > Triggered Alarms. What you may check is whether the VM for which the alarm was triggered has VMware Tools installed (i. bios. You can use vSphere Fault Tolerance (FT) for most mission critical virtual machines. This virtual machine failed to become vSphere HA Protected and HA may not attempt to restart it after a failure. Incorrect Virtual Machine Protection State A virtual machine in a vSphere HA cluster is reported as vSphere HA unprotected although it has been powered on for. vSphere HA will keep retrying to fail over the virtual machines until it gets a successful placement, however if an affined virtual machine is. it times out. vCLS uses agent virtual machines to maintain cluster services health. A virtual machine is marked as disconnected when the vCenter has lost communication to the ESXi host where the virtual machine is running. It combines multiple NetApp storage systems, including NetApp ASA (A-series), AFF (A-Series, C-Series), and FAS family of storage systems, into a single cluster. One alarm I recently had was the "vSphere HA virtual machine failover failed" alarm, which you usually see when the ESXi hostd crashed, but the Virtual Machines are still running. Once all the services are back online, login to the vSphere UI, and confirm that the vCLS VMs are created for the cluster, and the vSphere Cluster Services status is set to healthy. Dedicated Failover Hosts Admission Control You can configure vSphere HA to designate specific hosts as the failover hosts. Allowing. 3. 2. These system VMs cannot be powered-off by users. If the vSphere HA virtual machine monitoring action alarm reappear, you can try reinstalling VMware Tools and re-enabling vSphere HA VM Monitoring feature. The vSphere HA agent on host 'hostname' failed to quiesce file activity on datastore '/vmfs/volumes/volume id'. In the top right, click on EDIT VCLS MODE. During a Site Recovery Manager workflow, post Test Recovery or Failover operations, some of recovered virtual machines might throw the following alarm: vSphere HA virtual machine failover failed. vSAN uses its own logical network. vCLS run in every cluster, even when. All the VMs on this host get the below error: vSphere HA virtual machine failover failed. log file and check if there are errors related to communication with vCenter Server and the host Management Agent (hostd). If the issue is only for a few VMs and not for host then it might be a cosmetic issue while VM is properly HA protected at backend. 0 Update 1, a set of system VMs might be placed within the vSAN cluster. This could be frightening but fear not, this is part of VMware vSphere 7. The guest operating system on the VMs did not report a power failure. HA failover does not occur after setting Traffic Type option on a vmknic to support witness traffic If you set the traffic type option on a vmknic to support witness traffic, vSphere HA does not automatically discover the new setting. Error: (vim. If you disabled vSphere HA, re-enable it. Power off the virtual machine and disable CBRC to all disks through API. When I reboot one of the 4 hosts (there is a VM running on the host),The HA failover failed on it. When vSAN and vSphere HA are enabled for the same cluster, the HA interagent traffic flows over this storage network rather than the management network. Select Show cluster entries in the dropdown. a few vms are showing this. Configure Enhanced vMotion Compatibility (EVC) mode on the existing cluster and add the two new hosts into the cluster. Cluster compute maintenance (more details here - Automatic power-off of vCLS VMs during maintenance mode) When there is only 1 host - vCLS VMs will be automatically powered-off when the single host cluster is put into Maintenance Mode, thus maintenance workflow is not blocked. 1 Solution. 0 Update 1 release VMware introduced a new service called the VMware vSphere Cluster Services (vCLS). VMware High Availability (HA) is a utility that eliminates the need for dedicated standby hardware and software in a virtualized environment. I am also unable to modify the Alarm Frequency, as it is greyed out. A vSphere Administrator sees the alarm: vSphere HA virtual machine failed to failover This occurred for a number of virtual machines on a particular ESXi host in a cluster with vSphere High Availability (HA) enabled. vCLS is upgraded as part of vCenter Server upgrade. If the datastore that is being considered for "unmount" or. Click Edit. This monitor tracks the vCenter alarm that alerts when vSphere HA failed to failover a virtual machine. bios. 5 hosts but will restart such a virtual machine if it was running on an ESX 4. Click vSphere HA located under Services. Reason: Failed to start the virtual machine. You. As you know, if you lose vCenter Server, you also lose the Distributed Resource Scheduler (DRS), so your VMs are no longer balanced across your cluster. For a. 5. vSphere HA leverages a High Availability cluster (a logical grouping of ESXi hosts pooled on the same network) to protect against ESXi hosts, VMs and application failure. Admission Control/Host failures cluster tolerates: 1. Resolution. Search for vCLS in the name column. High availability: vCLS provides a highly available control plane for vSphere clusters, ensuring that virtual machines and other services remain available even in the event of host failures or network issues. I am also unable to modify the Alarm Frequency, as it is greyed out. Click on the Alarms tab and then the Triggered Alarms button. We just want to migrate VM to the ESX host that just exit from maintenance mode. Log in to the Passive node through the Virtual Machine Console. This fault occurs when the HA configuration of CPU or memory resources reserved for failover is violated or is insufficient for the DRS operation. vSphere HA provides high availability for virtual machines by pooling them and the hosts that they reside on into a cluster. Biraz daha detaylı açıklamak gerekirse sorunu birlikte incelememiz gerekebilir. Log in to the Active node with the vSphere Client. Review vCenter Server events to confirm that a vSphere HA failover has occurred. vCenter Server is the service through which you manage multiple hosts connected in a network and pool host resources. Navigate to the "Hosts and Clusters" view. Then we change the DRS setting to aggressive and run HA reconfigure on the other two ESX hosts (Let us call them Host1 and Host2). To clear this alarm on multiple virtual machines, you may select the host, cluster, data center, or vCenter Server object in the left pane and continue with below step to clear the alarms . vCLS Agent Virtual Machine Specifications 78. Site Recovery Manager 8. One of them (say Host3) just exit Maintenance Mode. Click OK. Updated on 08/23/2022. These agent VMs are mandatory for the operation of a DRS cluster and are. What you may check is whether the VM for which the alarm was triggered has VMware Tools installed (i. Perform one of the following steps until the vSphere HA status for the cluster returns to normal and VMs can be turned on: Maintenance Mode - return the host into Maintenance Mode. The number of vSphere HA heartbeat datastores for this host is 0, which is less than required: 2. Initial placement: Recommended host is displayed. vSphere HA will retry when. When you add the first three hosts to the cluster, vSphere Cluster Services (vCLS) agent virtual machines are added by default to the cluster. In short, if a virtual machine can successfully perform a VMotion across the. Allowing HA on host failure to failover the virtual machine, will restart the virtual machine on another host with a new, empty NVDIMM. Click NEXT and complete the New Virtual Machine wizard. Create Additional Physical-Virtual Pairs 32. this virtual machine to become vsphere HA protected and HA may not attempt to restart it after a failure. VMware vCenter High Availability (HA) Admission Control is a feature in VMware vSphere that ensures that there are enough resources available in a cluster to power on all of the protected virtual machines in the event of a host failure. Disable the Turn On VMware HA option. To do this, it reverts the VM replica to the necessary snapshot in the replica chain. Select the host that contains the orphaned vCLS VMs. 693618+02:00] [vim. Click on the Configure tab. Click Edit. If a vCenter HA failover is initiated during the remediation of a cluster, the remediation task is canceled. EventEx] [info] [] [DC-xxxxx] [87492702] [vSphere HA failover operation in. Navigate to Monitor tab, and click Issues and Alarms > Triggered Alarms. Create a new vSphere cluster and move only three hosts into the new cluster. 1 cluster havng some HA issues. Solution. After I disable option "Admission Control " on vSphere HA of " setting HA cluster " and migrate normal the virtual machine to host other. We switch to the host console. vCLS is enabled when you upgrade to vSphere 7. NOTE 1: Do not shut down the Nutanix Controller VMs. PowerCLI to vCenter; Run the following command to disable the alarm02-07-2012 01:00 PM. This is one of a series of KB articles that provide information about default vSphere alarms for virtual machines. If there are any, migrate those VMs to another datastore within the cluster if there is another datastore attached to the hosts within the cluster. 0 or later host. Corporate. (The vCLS VMs) Your invalid ones are as such because. Use the domain ID copied in Step 3. 11-15-2012 06:24 AM. . 1 cluster with some problems HA. . If the Active node recovers from the failure, it becomes the Active node again. It will also want to try to restart those VMs. Depending on whether or not Enhanced vMotion Compatibility (EVC) is activated, DRS behaves differently when you use vSphere Fault Tolerance (vSphere FT) virtual machines in your cluster. Select the host on which to run the virtual machine and click Next. Attach the VMware-vCenter-Server-Appliance-7. SDDC Manager prechecks telling me “maintenance mode dry run” failed because I had a VM pinned to a host, when I did not; more than one vCLS virtual machine running on the same host; As you can see, I have. On the VM there is a red event: vSphere HA virtual machine failover failed. The vCLS agent VMs are tied to the cluster object, not the DRS or HA service. vSphere HA unsuccessfully failed over <virtual-machine> on <host> in cluster <cluster name>. esxi41. [1-1] [2023-05-11T16:27:44. Deselect the Turn On vSphere HA option. vc. In case of replication failures, check if the vCenter HA network has sufficient bandwidth and ensure network latency is 10 ms or less. 1. 2. vMSC infrastructures are implemented with a goal. vsphere HA Virtual Machine failover failed. Right-click the NAA ID of the LUN (as noted above) and click Detach. vSphere HA is resetting VM. vCLS is activated when you upgrade to vSphere 7. vSphere ha virtual machine failover failed. Log in to the vSphere Client. VM powered on. 1st vCLS added to Host 1, 2nd vCLS Host 2, 3rd vCLS to Host 3. vSphere HA will. When there is only 1 host - vCLS VMs will be automatically powered-off when the single host cluster is put into Maintenance Mode, thus maintenance workflow is not blocked. Alarm 'vSphere HA virtual machine failover failed' changed from Gray to Red Not enough resources to failover this virtual machine. vCLS provides a mechanism that allows VMware to decouple both vSphere DRS and vSphere HA from vCenter Server. log file, there are entries similar to:spoons card game HA is a feature which restarts failed virtual machines (or inaccessible virtual machines if host isolation is configured) and does result in downtime for the VM, since the entire virtual. Power On virtual machine – Module CPUID power on failed; Unable to delete an “inaccessible” datastore (Zombie datastore) How to fix “vSphere HA initiated a virtual machine failover action” NFS-Server with CentOS 8 / Red Hat 8 for VMware vCenter Backups; The default partition ‘/’ has only 3. A device is mounted to the virtual machine. vSphere HA completed a virtual machine failover on SRM test. Problem If you select the Host Failures. How can we get rid of these alerts? local_offer Tagged Items; VMware ESXi star 4. View Answer. To be clear, I never said rebooting VCSA would remove your broken ones, I said it would recreate them. InaccessibleDatastore) The ESXi host on the node will become inaccessible in vSphere while the datastore is mounted. 0 U2, Using the vSphere Client. 23 exam topics: Architecture and Technologies, Products and Solutions, Planning and Designing, Installing, Configuring, and Setup, Performance-tuning, Optimization, and Upgrades, Troubleshooting and Repairing, Administrative and. This is a summary of the state of the virtual machine parameters. 0 Update 3 or when you have a new vSphere 7. To download the VMware vCenter Server 7. I don't know why. log file and check if there are errors related to communication with vCenter Server and the host Management Agent (hostd). vSphere HA virtual machine failover failed : Monitors whether a failover operation that uses vSphere High Availability failed. In the vSphere Client, browse to the vSphere HA cluster. Purpose. From description "vSphere Cluster Service VM is required to maintain the health of vSphere Cluster Services. The failover capacity of hosts can be defined in three different ways: Cluster resource PercentagevSphere HA initiated a failover action on 1 virtual machines in cluster %Cluster_Name% in datacenter %Datacenter_Name% No option to acknowledge, clear, or to see which machine was migrated. 0 Update 1 or newer, you will need to put vSphere Cluster Services (vCLS) in Retreat Mode to be able to power off the vCLS VMs. W. Upgrade the hardware on the hosts or add more hosts. Select the desired VM DRS group to which you want to apply your rule. 0: das. Ignore this alert. vSphere HA failed to create a configuration vVol for this datastore and so will not be able to protect virtual machines on the datastore until the problem is resolved. FT provides continuous availability for such a virtual machine by creating and maintaining another VM that is identical and continuously available to replace it in the event of a failover situation. Resolution. Due to the disruption in the communications between HA agents running on the ESX hosts, the HA agents on good hosts (the one or two hosts) will view the unhealthy hosts as Dead (failed). If I put one host in maintenance mode, the three vCLS VMs will be moved automatically, but not mines. Reply. vCLS is enabled when you upgrade to vSphere 7. vCenter High Availability (vCenter HA) protects vCenter Server against host and hardware failures. Then, select an affinity or anti. Storage vMotion of a virtual machine fails after 5 minutes with the error: vim. A pop-up window opens Edit Cluster Settings select vSphere HA radio and turn off (not green) > click OK. com) Opens a new window (I am not recommending the use of the "Retreat" mode in that KB, but it is chock full of technical information about vCLS) Jason Disabling HA admission control before you remediate a two-node cluster that uses a single vSphere Lifecycle Manager image causes the cluster to practically lose all its high availability guarantees. On the VM there is a red event: vSphere HA virtual machine failover failed. Under Settings select vCenter HA and click Initiate Failover. At the vCenter level select the Alarms tab, Edit the settings of the alarm, select the General tab, disabled/re-enable the alarm. g. View the Advanced Runtime Info pane that appears in the vSphere HA section of the cluster's Monitor tab in the vSphere Web Client. ; Add more physical CPU resources to the ESXi cluster. Updated on 05/31/2019. vSphere HA unsuccessfully failed over. The 2 GB virtual disk is thin provisioned. This is expected behavior for vSAN clusters. button. ERROR: This virtual machine failed to become vSphere HA Protected and HA may not attempt to restart it after a failure. As a result, after a restart of the vCenter Server or the host, all encrypted virtual machines in that host are in a locked state. Enable vSphere HA and vSphere DRS in a Cluster (MSCS) 33 Create VM-VM Affinity Rules for MSCS Virtual Machines 33 Enable Strict Enforcement of Affinity Rules (MSCS) 34 Set DRS Automation Level for MSCS Virtual. Click OK. When a number of file system locking operations, virtual machine power ons, power offs, or vMotion migrations occur on a single VMFS volume, this can trigger fault tolerant virtual machines to be failed over. HA (High Availability) in a cluster is a common practice applied by virtualization vendors to ensure that virtual machines are operating all the time without interruption. Click on “Edit” and click on “Yes” when you are informed to not make changes to the VM. EventEx] [info] [] [DC-xxxxx] [87492702] [vSphere HA failover operation in. These vCLS VMs should be ignored from the cluster capacity checks. Under Settings select vCenter HA and click Initiate Failover. 1. In vSphere 7 Update 1, vSphere Clustering Service (vCLS) was introduced, it basically provides DRS and HA even if vCenter server is down, cool. Not always but sometimes we tend to see an alarm on a VM "vSphere HA virtual machine failover failed". Also, all the VMs indicating that HA failure message have "vSphere HA Protection: Protected'. An easy and simple test for identifying HA capability for a virtual machine is to perform a VMotion. Select vSphere Availability and click Edit. Login to the vSphere Client. In the Edit vCLS Mode pop up window, click on the second radio option Retreat Mode. When the master host in a vSphere HA cluster is unable to communicate with a slave host over the ESXi management network, the master host resorts to using datastore heartbeats to establish whether the slave host has become unavailable, is in a partition state, or is network isolated. Add a new entry, config. 20 Questions] A VSphere administrator sees the alarm: vSphere HA virtual machine failed to failover. vcls. "This is expected behavior in VMware vCenter Server 5. 5. Avoid refreshing your web browser to ensure a successful network upgrade. vCLS is activated when you upgrade to vSphere 7. This new cluster is part of a larger datacenter that has been running fine. Hosts in the cluster are monitored and in the event of a failure, the virtual machines on a failed host are restarted on alternate hosts. VM. Scalability: vCLS is designed to scale easily, so it can be used to manage even the largest vSphere clusters. In this blog, we demonstrate how to troubleshoot and correct this state automatically with vCenter's "Retreat Mode. vSphere High Availability (HA) allows you to pool virtual machines and the hosts they reside on into a cluster. Normally due to event "Insufficient resources to fail over this virtual machine. View Answer. To learn more about the purpose and architecture of vCLS,. What is the vCLS Virtual Machine on VMware - The Tech Journal (stephenwagner. A quorum of up to three vCLS agent virtual machines are required to run in a cluster, one agent virtual machine per host. When changing the value for "config. Locate the cluster. x fails for agent virtual machines on vSphere Cluster Service in vCenter 7. This issue can be resolved by. Trigger conditions. vSphere HA provides high availability for virtual machines by pooling the virtual machines and the hosts they reside on into a cluster. Right-click the cluster and click Settings. What is the vCLS VM? The vCLS virtural machine is essentially an “appliance” or “service” VM that allows a vSphere cluster to remain functioning in the event that the vCenter Server becomes unavailable. 02-21-2020 06:11 AM. Veeam Backup & Replication powers on the VM replica. vCLS is a mandatory feature that is deployed on each vSphere Cluster (incl. This virtual machine to become protected vsphere HA and HA can not try to restart after a power failure. What is the vCLS VM? The vCLS virtural machine is essentially an “appliance” or “service” VM that allows a vSphere cluster to remain functioning in the event that the vCenter Server becomes unavailable. virtual machine. Veeam VMware: vSphere HA VM Component Protection could not power off a virtual machine Alarm. Upgrade the VM’s “Compatibility” version to at least “VM version 14” (right-click the VM) Click on the VM, click on the Configure tab and click on “VMware EVC”. Deal with the vSphere HA virtual machine failed to failover error if occurs. Below are the listed operations that may fail if DRS is non-functional: A new workload VM placement/power-on. There is an issue with VMware high-availability protection for this virtual machine. 0 Update 1 (80472) (vmware. The basis of the vSphere Admission control is the number of host failures that the cluster is allowed to tolerate and that continues to ensure failover. 5, 6. With the slot policy option, vSphere HA admission control ensures that a specified number of hosts can fail and sufficient resources remain in the cluster to fail over all the virtual machines from those hosts. Note: VMware HA can be disabled only if there are no virtual machines with VMware Fault Tolerance (FT) enabled. Reason: The. This alarm does not mean HA has failed or stopped working. Select vSphere Availability in the Services section of the Configure page for your cluster. As a result, they will start reacting to that failure and start attempting failover of the VMs on unhealthy hosts. 0 Update 3 deployment. vcls. 8 Heartbeat Datastores. Right-click the cluster and click Settings. In short, if a virtual machine can successfully perform a VMotion across the. VM monitoring action – Default alarm to alert when vSphere HA reset a virtual machine; Failover failed – Default alarm to alert when vSphere HA failed to failover a virtual machine; And there is the following host related alarm: HA status – Default alarm to monitor health of a host as reported by vSphere HA; To configure these. Repeat for the other vCLS VMs. GenericVmConfigFault Storage vMotion of a virtual machine fails at 30% to 44%. At the vCenter level select the Alarms tab, Edit the settings of the alarm, select the General tab, disabled/re-enable the alarm. Scalability: vCLS is designed to scale easily, so it can be used to manage even the largest vSphere clusters. Ignore this alert. For more information, see the vSphere 5. No: Cluster: 6. vSphere High Availability cluster only supports ESXi 6. Browse to the cluster in the vSphere Web Client object navigator. VMs already on the preferred site might register the following alert: Failed to failover. This fault is reported when: The host is requested to enter maintenance or standby mode. Procedure. If the LUN is being used as a VMFS datastore, all objects, (such as virtual machines, snapshots, and templates) stored on the VMFS datastore are unregistered or moved to another datastore. 07-06-2015 10:08 AM. Repeat steps 4 and 5, then go to step 9. If one of the nodes is down, check for hardware failure or network isolation. I got a 5. vSphere HA failed to restart a network isolated virtual machine. There are specific alarms to HA. Under vSphere Cluster Services, select General. 7 virtual machine" to change the virtual hardware version to 14, and click on [Upgrade]. event. EventEx] [info] [] [DC-xxxxx] [87492702] [vSphere HA failover operation in. Right-click the vSphere HA virtual machine failover failed alarm and click Clear. tools. It’s first release provides the foundation to work towards creating a decoupled and distributed control plane for clustering services in vSphere. How to clear the alarm from the virtual machine. Up to maximal. Procedure. bbs. vSphere HA host status : Monitors the host health status reported by vSphere High Availability. In the Home screen, click Hosts and Clusters. name}, in compute resource {computeResource. name} in {datacenter. Normally due to event "Insufficient resources to fail over this virtual machine. Confirm after 5 minutes it is no longer sending out alerts. The following apply if using a vSphere HA–enabled cluster that includes hosts with differing versions:With the release of vSphere Cluster Services (vCLS) in vSphere 7. Run lsdoctor with the "-t, --trustfix" option to fix any trust issues. Right-click the cluster and click Settings. This fault occurs when the HA configuration of CPU or memory resources reserved for failover is violated or is insufficient for the DRS operation. How vSphere HA Works. vCLS uses agent virtual machines to maintain cluster services health. Click Edit. 免責事項： これは英文の記事 「vSphere HA virtual machine failover failed alarm (2064229)」の日本語訳です。記事はベストエフォートで翻訳を進めているため、ローカライズ化コンテンツは最新情報ではない可能性があります。最新情報は英語版の記事で参照してください。vSphere Clustered Services virtual machines are part of the DRS/HA functionalities since vSphere 7. vSphere HA provides high availability for virtual machines by pooling the virtual machines and the hosts they reside on into a cluster. B. This alarm does not mean HA has failed or stopped working. This configuration signals the VMware vSphere cluster to reserve the necessary resources, such as CPU and memory, in order to accommodate all the virtual machines that were running on the. Causes. When I try to reconfigure HA on the host. It’s because the timeout settings in the HA needs to be changed to support this, luckily VMWARE provided a KB article about how to fix: The failed VM stays disconnected until the host is rebooted and back online 😕 It doesnt get reconnected or restarted on another host.