index [myindex] blocked by :[FORBIDDEN/12/index read-only / allow delete (api)] read_only_allow_delete

磁盘空间不够，导致索引不能写入。

index [myindex] blocked by :[FORBIDDEN/12/index read-only / allow delete (api)] read_only_allow_delete

解决方法：

PUT myindex/_settings
{
  "index.blocks.read_only_allow_delete": null
}