1. Click the Hosts tab and select All Hosts.
2. Click the Inspect All Hosts button. Cloudera Manager begins several tasks to inspect the managed hosts.
3. After the inspection completes, click Download Result Data or Show Inspector Results to review the results.

The results of the inspection displays a list of all the validations and their results, and a summary of all the components installed on your managed hosts.

If the validation process finds problems, the Validations section will indicate the problem. In some cases the message may indicate actions you can take to resolve the problem. If an issue exists on multiple hosts, you may be able to view the list of occurrences by clicking a small triangle that appears at the end of the message.

The Version Summary section shows all the components that are available from Cloudera, their versions (if known) and the CDH distribution to which they belong (CDH 3 or CDH 4). If you are running CDH 3, the Version will be listed as "Unavailable". Version identification is not available with CDH 3. In a CDH 3 cluster, CDH 4 components will be listed as "Not installed or path incorrect".

If you are running multiple clusters with both CDH 3 and CDH 4, the lists will be organized by distribution (CDH 3 or CDH 4). The hosts running that version are shown at the top of each list.

You can view the results of a past host inspection by looking for the Host Inspector command using the Recent Commands feature.

1. Click the Running Commands indicator () located just to the left of the Search box at the right hand side of the navigation bar.
2. Click the Recent Commands button.
3. If the command is too far in the past, you can use the Time Range Selector to move the time range back to cover the time period you want.
4. When you find the Host Inspector command, click its name to display its sub-commands.
5. Click the Show Inspector Results button to view the report.

See Viewing Running and Recent Commands for more information about viewing past command activity.