es磁盘满了导致的异常

Caused by: org.elasticsearch.ElasticsearchStatusException: Elasticsearch exception [type=cluster_block_exception, reason=blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];]

ES所在的系统出现磁盘满了的问题，占用95%的磁盘，删除后已用磁盘空间降至40%，但问题依然存在，需要重新修改一下属性值.
解决方法:
PUT /_all/_settings
{
“index.blocks.read_only_allow_delete”: null
}