使用elasticsearch-dsl的delete方法时版本冲突

Question

因此，我们在 Django 项目中使用elasticsearch，并且使用elasticsearch-dsl python 库。

我们在生产中遇到以下错误：

ConflictError(409, '{"took":7,"timed_out":false,"total":1,"deleted":0,"batches":1,"version_conflicts":1,"noops":0,"retries":{"bulk":0,"search":0},"throttled_millis":0,"requests_per_second":-1.0,"throttled_until_millis":0,"failures":[{"index":"events","type":"_doc","id":"KJ7SpWsBZnen1jNBRWWM","cause":{"type":"version_conflict_engine_exception","reason":"[KJ7SpWsBZnen1jNBRWWM]: version conflict, required seqNo [1418], primary term [1]. current document has seqNo [1419] and primary term [1]","index_uuid":"2-fSZILVQzuJE8KVmpLFXQ","shard":"0","index":"events"},"status":409}]}')

并具有更好的格式：

{
    "took": 7,
    "timed_out": false,
    "total": 1,
    "deleted": 0,
    "batches": 1,
    "version_conflicts": 1,
    "noops": 0,
    "retries": {
        "bulk": 0,
        "search": 0
    },
    "throttled_millis": 0,
    "requests_per_second": -1.0,
    "throttled_until_millis": 0,
    "failures": [
        {
            "index": "events",
            "type": "_doc",
            "id": "KJ7SpWsBZnen1jNBRWWM",
            "cause": {
                "type": "version_conflict_engine_exception",
                "reason": "[KJ7SpWsBZnen1jNBRWWM]: version conflict, required seqNo [1418], primary term [1]. current document has seqNo [1419] and primary term [1]",
                "index_uuid": "2-fSZILVQzuJE8KVmpLFXQ",
                "shard": "0",
                "index": "events"
            },
            "status": 409
        }
    ]
}

产生错误的代码是对 dsl 方法的调用delete：

connections.create_connection(
    hosts=[settings.ELASTICSEARCH_HOST],
    timeout=20,
)
search = EventDocument.search()
# The query is made by the django model's id
search.query('match', id=self.id).delete()

这是 的定义EventDocument：

from elasticsearch_dsl import (
    Document,
    Integer,
)


class EventDocument(Document):
    id = Integer()
    # other fields

我们现在最大的问题是我们无法访问服务器，我们通过为错误配置的自动电子邮件收到错误。所以我什至不知道如何重现它。

希望你能帮忙，谢谢。

Answer 1

此错误是由于您的文档中的版本冲突而发生的。来自ES官方文档

Elasticsearch 是分布式的。当创建、更新或删除文档时，必须将文档的新版本复制到集群中的其他节点。Elasticsearch 也是异步和并发的，这意味着这些复制请求是并行发送的，并且可能不按顺序到达目的地。Elasticsearch 需要一种方法来确保文档的旧版本永远不会覆盖新版本。

在这个官方文档中阅读有关如何version conflict http 409在 ES 中处理异常的更多信息，该文档还解释了为什么会出现异常以及处理异常的各种方法，并详细解释了这个概念。