Esxi hosts becoming unresponsive
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Esxi hosts becoming unresponsive

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Article ID: 317888

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Updated On:

Products

VMware vSphere ESXi

Issue/Introduction

To prevent hosts from getting into non-responding or disconnected state

Symptoms:
>> host tend to disconnect
>> custom images provided by our vendors are used to deploy the hosts


Environment

VMware vSphere 7.0.x

Cause

The issue occurs in vendor images with customized drivers where ImageConfigManager consumes more RAM than allocated. As a result, repeated failures of ImageConfigManager cause ESXi hosts to disconnect from vCenter Server.

Vmkernel.log

   YYYY-MM-DDT22:53:59.956Z cpu27:2104032)uw.2104033 (39550) extraMin/extraFromParent: 1921/1921, sh.2104025 (39475) childEmin/eMinLimit: 25590/25600
   YYYY-MM-DDT22:53:59.956Z cpu27:2104032)Admission failure in path: host/vim/vmvisor/hostd-tmp/sh.2104025:python.2104033:uw.2104033
   YYYY-MM-DDT22:53:59.958Z cpu27:2104032)WARNING: LinuxThread: 424: python: Error cloning thread: -28 (bad0081)
   YYYY-MM-DDT22:53:59.960Z cpu27:2104032)Admission failure in path: host/vim/vmvisor/hostd-tmp/sh.2104025:python.2104034:uw.2104034
   YYYY-MM-DDT22:53:59.960Z cpu27:2104032)uw.2104034 (39559) extraMin/extraFromParent: 39/39, sh.2104025 (39475) childEmin/eMinLimit: 25581/25600
   YYYY-MM-DDT22:53:59.960Z cpu27:2104032)Admission failure in path: host/vim/vmvisor/hostd-tmp/sh.2104025:python.2104034:uw.2104034
   YYYY-MM-DDT22:53:59.961Z cpu27:2104032)WARNING: LinuxThread: 424: python: Error cloning thread: -28 (bad0081)
   YYYY-MM-DDT22:54:00.823Z cpu27:2104032)Admission failure in path: host/vim/vmvisor/hostd-tmp/sh.2104025:python.2104035:uw.2104035
   YYYY-MM-DDT22:54:00.823Z cpu27:2104032)uw.2104035 (39568) extraMin/extraFromParent: 512/512, sh.2104025 (39475) childEmin/eMinLimit: 25579/25600
   YYYY-MM-DDT22:54:00.823Z cpu27:2104032)Admission failure in path: host/vim/vmvisor/hostd-tmp/sh.2104025:python.2104035:uw.2104035

Hostd.log
 
   YYYY-MM-DDT22:53:59.533Z info hostd[2100566] [Originator@6876 sub=Vimsvc.TaskManager opID=esxui-7618-94e7 user=root] Task Created : haTask-ha-host-vim.host.ImageConfigManager.fetchSoftwarePackages-450
   YYYY-MM-DDT22:53:59.534Z info hostd[2100586] [Originator@6876 sub=SysCommandPosix opID=esxui-7618-94e7 user=root] ForkExec(/usr/bin/sh) 2104025

Resolution

This issue is fixed in 7.0 U2C
Please refer à https://docs.vmware.com/en/VMware-vSphere/7.0/rn/vsphere-esxi-70u2c-release-notes.html#2765980