| --- |
| type: docs |
| title: "1-7 - Notification registration event failed" |
| linkTitle: "1-7 - Failed to read and write registry service cache" |
| weight: 7 |
| --- |
| |
| ### Possible Reason |
| |
| 1. When applied to related platforms based on the xDS protocol, when metadata is updated, consumers need to be notified. If a consumer is offline, the notification will fail and the listener of the corresponding consumer will be removed. |
| |
| ### Troubleshooting and resolution steps |
| |
| > see also |
| [Registration Center - Configuration Item Reference Manual](/zh-cn/overview/mannual/java-sdk/reference-manual/config/properties/#registry) |
