Nigel Boulton's Blog
19Oct/110

Virtual Machine search in vSphere Client does not return expected results

I was recently responsible for troubleshooting a problem where searching for certain virtual machines in the vSphere Client didn't always return the expected results. The problem was occurring in both our production and non-production environments and the symptom was as described below:

In the vSphere Client, in Hosts and Clusters view, selecting (for example) a Datacenter in the tree in the left pane, then typing the name of an existing VM into the "Name, State or Guest OS contains:" box on the Virtual Machines tab wouldn't always return the VM in the search results. In some cases the VM search would behave in this way when targeted at at the Datacenter level, in others at the vCenter level and in others still, at the cluster level. The "Search Inventory" box exhibited the same behaviour. It was, however, possible to target the search at the host on which the VM resided and have it returned consistently in the search results. Similar behaviour occurred when searching for VMs in VMs and Templates view, and in all cases the VM in question continued to be displayed in the tree in the left pane of the vSphere Client.

After some searching online, I decided to raise a call with VMware Support. The Engineer who called me back immediately knew the cause of the problem, and directed me to a VMware Knowledge Base article:

Sort sequence is incorrect and sorting/scrolling in the Virtual Machines tab in vCenter Server is slow (1029665)

Neither of these observations were the case in our environments, but the underlying cause was the same – it was, as the article says, "due to a conservative Java Memory Pool setting on which the Tomcat service depends for various functions. This issue usually occurs when the number of virtual machines is more than 500, but is dependent on a number of factors in your environment." In our environments at the time we had 850 and 300 VMs respectively.

If you have a 64-bit vCenter (4.x) Server, increasing the value of the memory pool in the Java Memory Pool settings is an easy fix:

  1. On the vCenter Server, click Start > All Programs > VMware > VMware Tomcat > Configure Tomcat
  2. Click the Java tab
  3. Double the number in the Initial and Maximum memory pool field (defaults are 256 and 1024 MB respectively)
  4. Click OK
  5. Verify that there are no tasks running in the environment
  6. Restart the VirtualCenter Server service – this will also restart the VirtualCenter Management Webservices service, as the latter is dependent. Bear in mind that anybody running the vSphere Client will be logged off when the services restart

If you have a 32-bit vCenter Server, follow the instructions under "Additional Information" in the article.