| --- |
| aliases: |
| - /en/docs3-v2/java-sdk/faq/5/1/ |
| - /en/docs3-v2/java-sdk/faq/5/1/ |
| - /en/overview/mannual/java-sdk/faq/5/1/ |
| description: 5-1 - Configuration Center Connection Failure |
| linkTitle: 5-1 - Configuration Center Connection Failure |
| title: 5-1 - Configuration Center Connection Failure |
| type: docs |
| weight: 1 |
| --- |
| |
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| ### Possible Causes |
| |
| 1. The server where the configuration center is located is shut down or crashed. |
| 2. The IP address or port number is incorrect. |
| 3. A firewall is incorrectly blocking the port used by the configuration center. |
| |
| |
| ### Troubleshooting and Resolution Steps |
| |
| 1. Check the configuration of the configuration center's IP address and port. |
| 2. Verify whether the server is powered on and functioning properly. |
| 3. Check if the firewall is allowing the port used by the configuration center. |
| |
