Delete requests fail with error "request [DELETE xxxx] does not support having a body" using NEST 7.5.1

[kappa7194]

NEST/Elasticsearch.Net version:

Library	Version
NEST	7.5.1
NEST.JsonNetSerializer	7.5.1
Elasticsearch.Net	7.5.1
Newtonsoft.Json	12.0.3

Elasticsearch version:
Elastic Cloud instance v7.15.1

.NET runtime version:
.NET Framework 4.8

Operating system version:
Microsoft Windows 10 21H1 19043.1348

Description of the problem including expected versus actual behavior:
The problem is the same one of the issue #5704, which has been closed by the reporter without explanation.
Whenever we try to delete a document the request fails with the error included below.

Steps to reproduce:

1. Delete any document.

var request = new DeleteRequest<TDocument>("index_name", "document_id");
var response = client.Delete(request);

Expected behavior
The request succeeds.

Provide ConnectionSettings (if relevant):

var credentials = new BasicAuthenticationCredentials("username", "password");
var settings = new ConnectionSettings("cloud_id", credentials).EnableDebugMode().ThrowExceptions();
var client = new ElasticClient(settings);

Provide DebugInformation (if relevant):

# FailureReason: BadResponse while attempting DELETE on [redacted]/default/_doc/11c36e71-79c5-62e4-9128-ff01007028e9it?pretty=true&error_trace=true
# Audit trail of this API call:
 - [1] BadResponse: Node: [redacted]/ Took: 00:00:00.5602843
# OriginalException: Elasticsearch.Net.ElasticsearchClientException: The remote server returned an error: (400) Bad Request.. Call: Status code 400 from: DELETE /default/_doc/11c36e71-79c5-62e4-9128-ff01007028e9it?pretty=true&error_trace=true. ServerError: Type: illegal_argument_exception Reason: "request [DELETE /default/_doc/11c36e71-79c5-62e4-9128-ff01007028e9it] does not support having a body" ---> System.Net.WebException: The remote server returned an error: (400) Bad Request.
   at System.Net.HttpWebRequest.GetResponse()
   at Elasticsearch.Net.HttpWebRequestConnection.Request[TResponse](RequestData requestData) in c:\Projects\elastic\net-7\src\Elasticsearch.Net\Connection\HttpWebRequestConnection.cs:line 59
   --- End of inner exception stack trace ---
   at Elasticsearch.Net.Transport`1.HandleElasticsearchClientException(RequestData data, Exception clientException, IElasticsearchResponse response) in c:\Projects\elastic\net-7\src\Elasticsearch.Net\Transport\Transport.cs:line 225
   at Elasticsearch.Net.Transport`1.FinalizeResponse[TResponse](RequestData requestData, IRequestPipeline pipeline, List`1 seenExceptions, TResponse response) in c:\Projects\elastic\net-7\src\Elasticsearch.Net\Transport\Transport.cs:line 194
   at Elasticsearch.Net.Transport`1.Request[TResponse](HttpMethod method, String path, PostData data, IRequestParameters requestParameters) in c:\Projects\elastic\net-7\src\Elasticsearch.Net\Transport\Transport.cs:line 103
   at Nest.ElasticClient.Delete(IDeleteRequest request) in c:\Projects\elastic\net-7\src\Nest\ElasticClient.NoNamespace.cs:line 336
   at [redacted]
# Request:
{}
# Response:
{
  "error" : {
    "root_cause" : [
      {
        "type" : "illegal_argument_exception",
        "reason" : "request [DELETE /default/_doc/11c36e71-79c5-62e4-9128-ff01007028e9it] does not support having a body",
        "stack_trace" : "[request [DELETE /default/_doc/11c36e71-79c5-62e4-9128-ff01007028e9it] does not support having a body]; nested: IllegalArgumentException[request [DELETE /default/_doc/11c36e71-79c5-62e4-9128-ff01007028e9it] does not support having a body];\n\tat org.elasticsearch.ElasticsearchException.guessRootCauses(ElasticsearchException.java:633)\n\tat org.elasticsearch.ElasticsearchException.generateFailureXContent(ElasticsearchException.java:561)\n\tat org.elasticsearch.rest.BytesRestResponse.build(BytesRestResponse.java:138)\n\tat org.elasticsearch.rest.BytesRestResponse.<init>(BytesRestResponse.java:99)\n\tat org.elasticsearch.xpack.security.rest.SecurityRestFilter$1.<init>(SecurityRestFilter.java:106)\n\tat org.elasticsearch.xpack.security.rest.SecurityRestFilter.handleException(SecurityRestFilter.java:106)\n\tat org.elasticsearch.xpack.security.rest.SecurityRestFilter.lambda$handleRequest$1(SecurityRestFilter.java:90)\n\tat org.elasticsearch.action.ActionListener$1.onFailure(ActionListener.java:142)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:136)\n\tat org.elasticsearch.xpack.security.authc.support.SecondaryAuthenticator.lambda$authenticateAndAttachToContext$2(SecondaryAuthenticator.java:83)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.xpack.security.authc.support.SecondaryAuthenticator.authenticate(SecondaryAuthenticator.java:93)\n\tat org.elasticsearch.xpack.security.authc.support.SecondaryAuthenticator.authenticateAndAttachToContext(SecondaryAuthenticator.java:78)\n\tat org.elasticsearch.xpack.security.rest.SecurityRestFilter.lambda$handleRequest$2(SecurityRestFilter.java:82)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.writeAuthToContext(AuthenticationService.java:727)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.finishAuthentication(AuthenticationService.java:704)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.consumeUser(AuthenticationService.java:651)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$consumeToken$10(AuthenticationService.java:528)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.action.support.ContextPreservingActionListener.onResponse(ContextPreservingActionListener.java:31)\n\tat org.elasticsearch.xpack.core.common.IteratingActionListener.onResponse(IteratingActionListener.java:127)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$consumeToken$7(AuthenticationService.java:494)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.xpack.security.authc.support.CachingUsernamePasswordRealm.lambda$authenticateWithCache$3(CachingUsernamePasswordRealm.java:206)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.xpack.security.authc.file.FileRealm.doAuthenticate(FileRealm.java:44)\n\tat org.elasticsearch.xpack.security.authc.support.CachingUsernamePasswordRealm.authenticateWithCache(CachingUsernamePasswordRealm.java:188)\n\tat org.elasticsearch.xpack.security.authc.support.CachingUsernamePasswordRealm.authenticate(CachingUsernamePasswordRealm.java:105)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$consumeToken$9(AuthenticationService.java:483)\n\tat org.elasticsearch.xpack.core.common.IteratingActionListener.run(IteratingActionListener.java:103)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.consumeToken(AuthenticationService.java:538)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$checkForApiKey$4(AuthenticationService.java:408)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.xpack.security.authc.ApiKeyService.authenticateWithApiKeyIfPresent(ApiKeyService.java:437)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.checkForApiKey(AuthenticationService.java:382)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$checkForBearerToken$2(AuthenticationService.java:366)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.xpack.security.authc.TokenService.tryAuthenticateToken(TokenService.java:393)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.checkForBearerToken(AuthenticationService.java:362)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.authenticateAsync(AuthenticationService.java:344)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.access$000(AuthenticationService.java:274)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService.authenticate(AuthenticationService.java:152)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService.authenticate(AuthenticationService.java:137)\n\tat org.elasticsearch.xpack.security.rest.SecurityRestFilter.handleRequest(SecurityRestFilter.java:75)\n\tat org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:275)\n\tat org.elasticsearch.rest.RestController.tryAllHandlers(RestController.java:343)\n\tat org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:196)\n\tat org.elasticsearch.http.AbstractHttpServerTransport.dispatchRequest(AbstractHttpServerTransport.java:348)\n\tat org.elasticsearch.http.AbstractHttpServerTransport.handleIncomingRequest(AbstractHttpServerTransport.java:413)\n\tat org.elasticsearch.http.AbstractHttpServerTransport.incomingRequest(AbstractHttpServerTransport.java:330)\n\tat org.elasticsearch.http.netty4.Netty4HttpRequestHandler.channelRead0(Netty4HttpRequestHandler.java:31)\n\tat org.elasticsearch.http.netty4.Netty4HttpRequestHandler.channelRead0(Netty4HttpRequestHandler.java:17)\n\tat io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat org.elasticsearch.http.netty4.Netty4HttpPipeliningHandler.channelRead(Netty4HttpPipeliningHandler.java:47)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)\n\tat io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324)\n\tat io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1374)\n\tat io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1237)\n\tat io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1286)\n\tat io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:507)\n\tat io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:446)\n\tat io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)\n\tat io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)\n\tat io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719)\n\tat io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:620)\n\tat io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:583)\n\tat io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)\n\tat io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986)\n\tat io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)\n\tat java.base/java.lang.Thread.run(Thread.java:833)\nCaused by: java.lang.IllegalArgumentException: request [DELETE /default/_doc/11c36e71-79c5-62e4-9128-ff01007028e9it] does not support having a body\n\tat org.elasticsearch.rest.BaseRestHandler.handleRequest(BaseRestHandler.java:101)\n\tat org.elasticsearch.xpack.security.rest.SecurityRestFilter.lambda$handleRequest$0(SecurityRestFilter.java:88)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\t... 103 more\n"
      }
    ],
    "type" : "illegal_argument_exception",
    "reason" : "request [DELETE /default/_doc/11c36e71-79c5-62e4-9128-ff01007028e9it] does not support having a body",
    "stack_trace" : "java.lang.IllegalArgumentException: request [DELETE /default/_doc/11c36e71-79c5-62e4-9128-ff01007028e9it] does not support having a body\n\tat org.elasticsearch.rest.BaseRestHandler.handleRequest(BaseRestHandler.java:101)\n\tat org.elasticsearch.xpack.security.rest.SecurityRestFilter.lambda$handleRequest$0(SecurityRestFilter.java:88)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.xpack.security.authc.support.SecondaryAuthenticator.lambda$authenticateAndAttachToContext$2(SecondaryAuthenticator.java:83)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.xpack.security.authc.support.SecondaryAuthenticator.authenticate(SecondaryAuthenticator.java:93)\n\tat org.elasticsearch.xpack.security.authc.support.SecondaryAuthenticator.authenticateAndAttachToContext(SecondaryAuthenticator.java:78)\n\tat org.elasticsearch.xpack.security.rest.SecurityRestFilter.lambda$handleRequest$2(SecurityRestFilter.java:82)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.writeAuthToContext(AuthenticationService.java:727)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.finishAuthentication(AuthenticationService.java:704)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.consumeUser(AuthenticationService.java:651)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$consumeToken$10(AuthenticationService.java:528)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.action.support.ContextPreservingActionListener.onResponse(ContextPreservingActionListener.java:31)\n\tat org.elasticsearch.xpack.core.common.IteratingActionListener.onResponse(IteratingActionListener.java:127)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$consumeToken$7(AuthenticationService.java:494)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.xpack.security.authc.support.CachingUsernamePasswordRealm.lambda$authenticateWithCache$3(CachingUsernamePasswordRealm.java:206)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.xpack.security.authc.file.FileRealm.doAuthenticate(FileRealm.java:44)\n\tat org.elasticsearch.xpack.security.authc.support.CachingUsernamePasswordRealm.authenticateWithCache(CachingUsernamePasswordRealm.java:188)\n\tat org.elasticsearch.xpack.security.authc.support.CachingUsernamePasswordRealm.authenticate(CachingUsernamePasswordRealm.java:105)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$consumeToken$9(AuthenticationService.java:483)\n\tat org.elasticsearch.xpack.core.common.IteratingActionListener.run(IteratingActionListener.java:103)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.consumeToken(AuthenticationService.java:538)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$checkForApiKey$4(AuthenticationService.java:408)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.xpack.security.authc.ApiKeyService.authenticateWithApiKeyIfPresent(ApiKeyService.java:437)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.checkForApiKey(AuthenticationService.java:382)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.lambda$checkForBearerToken$2(AuthenticationService.java:366)\n\tat org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:134)\n\tat org.elasticsearch.xpack.security.authc.TokenService.tryAuthenticateToken(TokenService.java:393)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.checkForBearerToken(AuthenticationService.java:362)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.authenticateAsync(AuthenticationService.java:344)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService$Authenticator.access$000(AuthenticationService.java:274)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService.authenticate(AuthenticationService.java:152)\n\tat org.elasticsearch.xpack.security.authc.AuthenticationService.authenticate(AuthenticationService.java:137)\n\tat org.elasticsearch.xpack.security.rest.SecurityRestFilter.handleRequest(SecurityRestFilter.java:75)\n\tat org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:275)\n\tat org.elasticsearch.rest.RestController.tryAllHandlers(RestController.java:343)\n\tat org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:196)\n\tat org.elasticsearch.http.AbstractHttpServerTransport.dispatchRequest(AbstractHttpServerTransport.java:348)\n\tat org.elasticsearch.http.AbstractHttpServerTransport.handleIncomingRequest(AbstractHttpServerTransport.java:413)\n\tat org.elasticsearch.http.AbstractHttpServerTransport.incomingRequest(AbstractHttpServerTransport.java:330)\n\tat org.elasticsearch.http.netty4.Netty4HttpRequestHandler.channelRead0(Netty4HttpRequestHandler.java:31)\n\tat org.elasticsearch.http.netty4.Netty4HttpRequestHandler.channelRead0(Netty4HttpRequestHandler.java:17)\n\tat io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat org.elasticsearch.http.netty4.Netty4HttpPipeliningHandler.channelRead(Netty4HttpPipeliningHandler.java:47)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)\n\tat io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324)\n\tat io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1374)\n\tat io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1237)\n\tat io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1286)\n\tat io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:507)\n\tat io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:446)\n\tat io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)\n\tat io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)\n\tat io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)\n\tat io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)\n\tat io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)\n\tat io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719)\n\tat io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:620)\n\tat io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:583)\n\tat io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)\n\tat io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986)\n\tat io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)\n\tat java.base/java.lang.Thread.run(Thread.java:833)\n"
  },
  "status" : 400
}

# Inner Exception: The remote server returned an error: (400) Bad Request.
System.Net.WebException: The remote server returned an error: (400) Bad Request.
   at System.Net.HttpWebRequest.GetResponse()
   at Elasticsearch.Net.HttpWebRequestConnection.Request[TResponse](RequestData requestData) in c:\Projects\elastic\net-7\src\Elasticsearch.Net\Connection\HttpWebRequestConnection.cs:line 59
# Exception:
Elasticsearch.Net.ElasticsearchClientException: The remote server returned an error: (400) Bad Request.. Call: Status code 400 from: DELETE /default/_doc/11c36e71-79c5-62e4-9128-ff01007028e9it?pretty=true&error_trace=true. ServerError: Type: illegal_argument_exception Reason: "request [DELETE /default/_doc/11c36e71-79c5-62e4-9128-ff01007028e9it] does not support having a body" ---> System.Net.WebException: The remote server returned an error: (400) Bad Request.
   at System.Net.HttpWebRequest.GetResponse()
   at Elasticsearch.Net.HttpWebRequestConnection.Request[TResponse](RequestData requestData) in c:\Projects\elastic\net-7\src\Elasticsearch.Net\Connection\HttpWebRequestConnection.cs:line 59
   --- End of inner exception stack trace ---
   at Elasticsearch.Net.Transport`1.HandleElasticsearchClientException(RequestData data, Exception clientException, IElasticsearchResponse response) in c:\Projects\elastic\net-7\src\Elasticsearch.Net\Transport\Transport.cs:line 225
   at Elasticsearch.Net.Transport`1.FinalizeResponse[TResponse](RequestData requestData, IRequestPipeline pipeline, List`1 seenExceptions, TResponse response) in c:\Projects\elastic\net-7\src\Elasticsearch.Net\Transport\Transport.cs:line 194
   at Elasticsearch.Net.Transport`1.Request[TResponse](HttpMethod method, String path, PostData data, IRequestParameters requestParameters) in c:\Projects\elastic\net-7\src\Elasticsearch.Net\Transport\Transport.cs:line 103
   at Nest.ElasticClient.Delete(IDeleteRequest request) in c:\Projects\elastic\net-7\src\Nest\ElasticClient.NoNamespace.cs:line 336
   at [redacted]

Notes:
NEST 7.5.1 has been set by the application we're extending as an exact dependency so we can't try to update it to a newer version to see if it works, we need to find a workaround.

[stevejgordon]

@kappa7194 Unfortunately an upgrade to at least 7.7.1 of Nest is required as that's when I believe the client implemented a change to avoid sending a body when not required by the endpoint. This was in order to respond to the server change in 7.11 which introduced stricter validation rules.

A potential workaround, if you cannot upgrade, would be to switch to using the LowLevelClient where you are able to handle the request bytes directly and could avoid sending a body at all.

For example:

var response = client.LowLevel.Delete<BytesResponse>("test-index", "1");
var stream = new MemoryStream(response.Body, false);
var deleteResponse = client.RequestResponseSerializer.Deserialize<DeleteResponse>(stream);

[kappa7194]

We also found as a potential workaround that bulk deletes work as intended, so we could also perform a bulk delete with a single document:

var response = client.Bulk(a => a.Delete<object>(b => b.Index(indexName).Id(documentId)));