ERROR: Failed to set password for user [apm_system].
Unexpected response code [503] from calling PUT http://172.19.0.1:9200/_security/user/apm_system/_password?pretty
Cause: Cluster state has not been recovered yet, cannot write to the [null] index
Possible next steps:
* Try running this tool again.
* Try running with the --verbose parameter for additional messages.
* Check the elasticsearch logs for additional error details.
* Use the change password API manually.
ERROR: Failed to set password for user [apm_system].
这个错误信息表明在尝试为`apm_system`用户设置密码时，Elasticsearch集群的状态尚未完全恢复，导致无法写入索引。以下是解决这个问题的步骤：
### 1. 检查集群状态
首先，检查Elasticsearch集群的状态，确保集群已经完全启动并正常运行。
```bash
curl -X GET "http://172.
原文地址：https://blog.csdn.net/SPESEG/article/details/142785058
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