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Troubleshooting Trellix ESM cluster issues

  • Published on Sep 12, 2026
  • 1 minute(s) read
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Address common issues encountered when setting up and maintaining Trellix ESM clusters.

Error

Description

ERROR_MaxItemsExceeded(256)

Too many nodes. The maximum number of nodes is 250.

allowFirst

Not set to false on children nodes

While you are editing the configuration, you can use the Reset feature to return the cluster to the last known good configuration. Once you write out the settings, you can't reset to a previous configuration.

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Related articles
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    Enterprise Security Manager > Enterprise Security Manager 11.7.x > ESM 11.7.x Installation Guide > Deploy a Trellix ESM solution on a VM > Add and configure devices > Configure Trellix ESMs
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    Enterprise Security Manager > Enterprise Security Manager 11.6.x > ESM 11.6.x Installation Guide > Deploy a Trellix ESM solution on a VM > Add and configure devices > Configure Trellix ESMs
  • Create and manage Trellix ESM clusters
    Enterprise Security Manager > Enterprise Security Manager 11.7.x > ESM 11.7.x Installation Guide > Deploy a Trellix ESM solution on a VM > Add and configure devices > Configure Trellix ESMs