为什么在使用 spring-data-elasticsearch 时将 HEAD 请求发送到我的索引
Why is a HEAD request sent to my index while using spring-data-elasticsearch
为什么在使用 spring-data-elasticsearch 时向我的索引发送 HEAD 请求，而应用程序在启动时正在引导
2020-09-26 18:59:31.438 TRACE 92147 --- [ main] o.s.data.elasticsearch.client.WIRE : [1d806de6] Sending request GET / with parameters:
2020-09-26 18:59:32.106 TRACE 92147 --- [/O dispatcher 1] o.s.data.elasticsearch.client.WIRE : [1d806de6] Received raw response: 400 BAD_REQUEST
2020-09-26 18:59:32.480 INFO 92147 --- [ main] o.s.d.elasticsearch.support.VersionInfo : Version Spring Data Elasticsearch: 4.0.4.RELEASE
2020-09-26 18:59:32.481 INFO 92147 --- [ main] o.s.d.elasticsearch.support.VersionInfo : Version Elasticsearch Client in build: 7.6.2
2020-09-26 18:59:32.481 INFO 92147 --- [ main] o.s.d.elasticsearch.support.VersionInfo : Version Elasticsearch Client used: 7.6.2
2020-09-26 18:59:32.745 TRACE 92147 --- [ main] o.s.data.elasticsearch.client.WIRE : [65503a26] Sending request HEAD /foos?ignore_throttled=false&ignore_unavailable=false&expand_wildcards=open%2Cclosed&allow_no_indices=false with parameters:
2020-09-26 18:59:32.824 TRACE 92147 --- [/O dispatcher 2] o.s.data.elasticsearch.client.WIRE : [65503a26] Received raw response: 400 BAD_REQUEST
初始化 Spring Data Elasticsearch 存储库时，如果 createIndex 属性为真，则会检查存储库实体 class 的 @Document 注释。如果是（此属性的默认值），则检查索引是否已存在。 这是通过向索引发出 HEAD 请求来完成的。
如果索引不存在，则创建索引，并写入映射。在这种情况下，我的示例程序的日志输出如下所示：
2020-09-26 21:10:08.298 TRACE 13667 --- [ main] o.s.data.elasticsearch.client.WIRE : [49c83262] Sending request GET http://localhost:9400/ with parameters:
2020-09-26 21:10:08.375 TRACE 13667 --- [/O dispatcher 1] o.s.data.elasticsearch.client.WIRE : [49c83262] Received raw response: 200 OK
2020-09-26 21:10:08.454 INFO 13667 --- [ main] o.s.d.elasticsearch.support.VersionInfo : Version Spring Data Elasticsearch: 4.0.4.RELEASE
2020-09-26 21:10:08.455 INFO 13667 --- [ main] o.s.d.elasticsearch.support.VersionInfo : Version Elasticsearch Client in build: 7.6.2
2020-09-26 21:10:08.455 INFO 13667 --- [ main] o.s.d.elasticsearch.support.VersionInfo : Version Elasticsearch Client used: 7.6.2
2020-09-26 21:10:08.455 INFO 13667 --- [ main] o.s.d.elasticsearch.support.VersionInfo : Version Elasticsearch cluster: 7.6.2
2020-09-26 21:10:09.652 TRACE 13667 --- [ main] o.s.data.elasticsearch.client.WIRE : [47ef5a33] Sending request HEAD http://localhost:9400/person?ignore_throttled=false&ignore_unavailable=false&expand_wildcards=open%2Cclosed&allow_no_indices=false with parameters:
2020-09-26 21:10:09.674 TRACE 13667 --- [/O dispatcher 1] o.s.data.elasticsearch.client.WIRE : [47ef5a33] Received raw response: 404 NOT_FOUND
2020-09-26 21:10:09.675 TRACE 13667 --- [ main] o.s.data.elasticsearch.client.WIRE : [72a34537] Sending request PUT http://localhost:9400/person?master_timeout=30s&timeout=30s with parameters:
Request body: {"settings":{"index":{"refresh_interval":"1s","store":{"type":"fs"},"number_of_shards":"1","number_of_replicas":"1"}},"aliases":{}}
2020-09-26 21:10:10.193 TRACE 13667 --- [/O dispatcher 1] o.s.data.elasticsearch.client.WIRE : [72a34537] Received raw response: 200 OK
2020-09-26 21:10:10.199 TRACE 13667 --- [ main] o.s.data.elasticsearch.client.WIRE : [68821f6] Sending request PUT http://localhost:9400/person/_mapping?master_timeout=30s&timeout=30s with parameters:
Request body: {"properties":{"last-name":{"fielddata":true,"type":"text"},"first-name":{"fielddata":true,"type":"text"},"birth-date":{"type":"date","format":"basic_date"},"movies":{"type":"nested","properties":{"year":{"type":"integer"}}},"created":{"type":"date","format":"basic_date_time"},"lastModified":{"type":"date","format":"basic_date_time"}}}
2020-09-26 21:10:10.270 TRACE 13667 --- [/O dispatcher 1] o.s.data.elasticsearch.client.WIRE : [68821f6] Received raw response: 200 OK
为什么在使用 spring-data-elasticsearch 时向我的索引发送 HEAD 请求，而应用程序在启动时正在引导
2020-09-26 18:59:31.438 TRACE 92147 --- [ main] o.s.data.elasticsearch.client.WIRE : [1d806de6] Sending request GET / with parameters:
2020-09-26 18:59:32.106 TRACE 92147 --- [/O dispatcher 1] o.s.data.elasticsearch.client.WIRE : [1d806de6] Received raw response: 400 BAD_REQUEST
2020-09-26 18:59:32.480 INFO 92147 --- [ main] o.s.d.elasticsearch.support.VersionInfo : Version Spring Data Elasticsearch: 4.0.4.RELEASE
2020-09-26 18:59:32.481 INFO 92147 --- [ main] o.s.d.elasticsearch.support.VersionInfo : Version Elasticsearch Client in build: 7.6.2
2020-09-26 18:59:32.481 INFO 92147 --- [ main] o.s.d.elasticsearch.support.VersionInfo : Version Elasticsearch Client used: 7.6.2
2020-09-26 18:59:32.745 TRACE 92147 --- [ main] o.s.data.elasticsearch.client.WIRE : [65503a26] Sending request HEAD /foos?ignore_throttled=false&ignore_unavailable=false&expand_wildcards=open%2Cclosed&allow_no_indices=false with parameters:
2020-09-26 18:59:32.824 TRACE 92147 --- [/O dispatcher 2] o.s.data.elasticsearch.client.WIRE : [65503a26] Received raw response: 400 BAD_REQUEST
初始化 Spring Data Elasticsearch 存储库时，如果 createIndex 属性为真，则会检查存储库实体 class 的 @Document 注释。如果是（此属性的默认值），则检查索引是否已存在。 这是通过向索引发出 HEAD 请求来完成的。
如果索引不存在，则创建索引，并写入映射。在这种情况下，我的示例程序的日志输出如下所示：
2020-09-26 21:10:08.298 TRACE 13667 --- [ main] o.s.data.elasticsearch.client.WIRE : [49c83262] Sending request GET http://localhost:9400/ with parameters:
2020-09-26 21:10:08.375 TRACE 13667 --- [/O dispatcher 1] o.s.data.elasticsearch.client.WIRE : [49c83262] Received raw response: 200 OK
2020-09-26 21:10:08.454 INFO 13667 --- [ main] o.s.d.elasticsearch.support.VersionInfo : Version Spring Data Elasticsearch: 4.0.4.RELEASE
2020-09-26 21:10:08.455 INFO 13667 --- [ main] o.s.d.elasticsearch.support.VersionInfo : Version Elasticsearch Client in build: 7.6.2
2020-09-26 21:10:08.455 INFO 13667 --- [ main] o.s.d.elasticsearch.support.VersionInfo : Version Elasticsearch Client used: 7.6.2
2020-09-26 21:10:08.455 INFO 13667 --- [ main] o.s.d.elasticsearch.support.VersionInfo : Version Elasticsearch cluster: 7.6.2
2020-09-26 21:10:09.652 TRACE 13667 --- [ main] o.s.data.elasticsearch.client.WIRE : [47ef5a33] Sending request HEAD http://localhost:9400/person?ignore_throttled=false&ignore_unavailable=false&expand_wildcards=open%2Cclosed&allow_no_indices=false with parameters:
2020-09-26 21:10:09.674 TRACE 13667 --- [/O dispatcher 1] o.s.data.elasticsearch.client.WIRE : [47ef5a33] Received raw response: 404 NOT_FOUND
2020-09-26 21:10:09.675 TRACE 13667 --- [ main] o.s.data.elasticsearch.client.WIRE : [72a34537] Sending request PUT http://localhost:9400/person?master_timeout=30s&timeout=30s with parameters:
Request body: {"settings":{"index":{"refresh_interval":"1s","store":{"type":"fs"},"number_of_shards":"1","number_of_replicas":"1"}},"aliases":{}}
2020-09-26 21:10:10.193 TRACE 13667 --- [/O dispatcher 1] o.s.data.elasticsearch.client.WIRE : [72a34537] Received raw response: 200 OK
2020-09-26 21:10:10.199 TRACE 13667 --- [ main] o.s.data.elasticsearch.client.WIRE : [68821f6] Sending request PUT http://localhost:9400/person/_mapping?master_timeout=30s&timeout=30s with parameters:
Request body: {"properties":{"last-name":{"fielddata":true,"type":"text"},"first-name":{"fielddata":true,"type":"text"},"birth-date":{"type":"date","format":"basic_date"},"movies":{"type":"nested","properties":{"year":{"type":"integer"}}},"created":{"type":"date","format":"basic_date_time"},"lastModified":{"type":"date","format":"basic_date_time"}}}
2020-09-26 21:10:10.270 TRACE 13667 --- [/O dispatcher 1] o.s.data.elasticsearch.client.WIRE : [68821f6] Received raw response: 200 OK