> For the complete documentation index, see [llms.txt](https://upsolver.gitbook.io/content/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://upsolver.gitbook.io/content/support-1/troubleshooting/cluster/compute-cluster-doesnt-start.md).

# Compute Cluster Doesn't Start

There might be a problem starting up the EC2 Spot Instance in your account due to AWS Service Limits. 

{% hint style="info" %}
Please see the [Deployment Guide](/content/how-to-guides-1/setup/deploy-upsolver-on-aws/deployment-guide.md) for more information,
{% endhint %}

## Check if your compute cluster is up:

1\. Navigate to the **EC2 Service** in the **AWS Console**.

2\. Click **Instances** (under **Instances**) in the navigation pane.

3\. Type **upsolver-data-updates** in the Search bar and click **Enter**.

{% hint style="info" %}
If items appear in the list, the compute cluster is up.
{% endhint %}

4\. If you have **multiple compute clusters** and you want to check if a specific compute cluster's instances are up, type **cluster\_name** in the Search box.

5\. Click **cluster\_name** under tag keys to view a menu containing the names of Upsolver clusters that are running in your AWS Account.

6\. Click a specific cluster name and verify there are items in the list for that specific cluster.


---

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