prestodb/presto · error · PrestoException

INVALID_RESOURCE_GROUP

INVALID_RESOURCE_GROUP

Error message

Cannot add queries to %s. It is not a leaf group.

What it means

PrestoException (INVALID_RESOURCE_GROUP) from InternalResourceGroup.run: a query was submitted to a resource group that has subgroups, making it a scheduling container rather than a leaf. Only leaf groups can run queries; parents exist purely to organize and limit children.

Source

Thrown at presto-main-base/src/main/java/com/facebook/presto/execution/resourceGroups/InternalResourceGroup.java:723

        return taskCount;
    }

    protected void setDirty()
    {
        synchronized (root) {
            this.isDirty.set(true);
            dirtySubGroups.addAll(subGroups());
            subGroups().forEach(InternalResourceGroup::setDirty);
        }
    }

    public void run(ManagedQueryExecution query)
    {
        boolean isQueryQueueFull = false;
        synchronized (root) {
            if (!subGroups.isEmpty()) {
                throw new PrestoException(INVALID_RESOURCE_GROUP, format("Cannot add queries to %s. It is not a leaf group.", id));
            }
            // Check all ancestors for capacity
            InternalResourceGroup group = this;
            boolean canQueue = true;
            boolean canRun = true;
            while (true) {
                canQueue &= group.canQueueMore();
                canRun &= group.canRunMore();
                if (!group.parent.isPresent()) {
                    break;
                }
                group = group.parent.get();
            }
            if (!canQueue && !canRun) {
                isQueryQueueFull = true;
            }
            else {
                query.setResourceGroupQueryLimits(perQueryLimits);

View on GitHub (pinned to 55bb57d202)

Solutions

1. Submit the query to one of the group's leaf subgroups instead of the parent
2. Fix the resource group configuration (resource-groups.json or the configuration manager plugin) so the intended group is a leaf
3. Fix the selector rules so they match a leaf group for this user/source

When it happens

Trigger: Thrown at presto-main-base/src/main/java/com/facebook/presto/execution/resourceGroups/InternalResourceGroup.java:723 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of prestodb/presto@55bb57d202 (2026-09-04). Data as JSON: /api/errors/da2fd77a0b921851. Report an issue: GitHub.