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Indexing a single doc to a data stream bulk endpoint trips assertion and returns class cast exception #120746

Closed
#129302
Closed
Indexing a single doc to a data stream bulk endpoint trips assertion and returns class cast exception#120746
#129302
Assignees
mhl-b
Labels
:Distributed/NetworkHttp and internode communication implementations>bugTeam:Distributed Coordination (obsolete)Meta label for Distributed Coordination team. Obsolete. Please do not use.
@dakrone

Description

@dakrone
dakrone
opened on Jan 23, 2025

Elasticsearch Version

Latest main branch

Installed Plugins

No response

Java Version

bundled

OS Version

OSX

Problem Description

Even though this is an invalid request, we shouldn't trip an assertion, and we shouldn't return a cryptic exception.

Steps to Reproduce

First, create a data stream:

POST /logs-foo-bar/_doc
{
  "@timestamp": "2024-01-01",
  "message": "aoeu aoeu aoeu"
}

Then, try to index a doc, but accidentally add …/_bulk to the endpoint:

POST /logs-foo-bar/_doc/_bulk
{
  "@timestamp": "2024-01-01",
  "message": "aoeu aoeu aoeu"
}

Logs (if relevant)

ES running in dev mode (assertions enabled) will then crash with:

[2025-01-23T09:44:59,734][ERROR][o.e.ExceptionsHelper     ] [runTask-0] fatal error java.lang.AssertionError: null
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.ExceptionsHelper.lambda$maybeDieOnAnotherThread$4(ExceptionsHelper.java:448)
	at java.base/java.util.Optional.ifPresent(Optional.java:178)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.ExceptionsHelper.maybeDieOnAnotherThread(ExceptionsHelper.java:438)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpPipeliningHandler.exceptionCaught(Netty4HttpPipeliningHandler.java:499)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:346)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:447)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4LeakDetectionHandler.channelRead(Netty4LeakDetectionHandler.java:38)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.codec@4.1.115.Final/io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:107)
	at io.netty.codec@4.1.115.Final/io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:120)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpContentSizeHandler.handleRequest(Netty4HttpContentSizeHandler.java:150)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpContentSizeHandler.channelRead(Netty4HttpContentSizeHandler.java:106)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpAggregator.channelRead(Netty4HttpAggregator.java:52)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.codec@4.1.115.Final/io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:107)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpHeaderValidator.forwardData(Netty4HttpHeaderValidator.java:213)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpHeaderValidator.forwardFullRequest(Netty4HttpHeaderValidator.java:156)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpHeaderValidator$1.lambda$onResponse$0(Netty4HttpHeaderValidator.java:128)
	at io.netty.common@4.1.115.Final/io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173)
	at io.netty.common@4.1.115.Final/io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166)
	at io.netty.common@4.1.115.Final/io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
	at io.netty.transport@4.1.115.Final/io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:566)
	at io.netty.common@4.1.115.Final/io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
	at io.netty.common@4.1.115.Final/io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at java.base/java.lang.Thread.run(Thread.java:1583)
[2025-01-23T09:44:59,735][ERROR][o.e.b.ElasticsearchUncaughtExceptionHandler] [runTask-0] fatal error in thread [elasticsearch-error-rethrower], exiting java.lang.AssertionError
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.http.HttpBody.asFull(HttpBody.java:42)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestRequest.content(RestRequest.java:313)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestRequest.requiredContent(RestRequest.java:341)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.action.document.RestIndexAction.prepareRequest(RestIndexAction.java:109)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.BaseRestHandler.handleRequest(BaseRestHandler.java:99)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestController$1.onResponse(RestController.java:466)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestController$1.onResponse(RestController.java:460)
	at org.elasticsearch.security@9.0.0-SNAPSHOT/org.elasticsearch.xpack.security.rest.SecurityRestFilter.doHandleRequest(SecurityRestFilter.java:89)
	at org.elasticsearch.security@9.0.0-SNAPSHOT/org.elasticsearch.xpack.security.rest.SecurityRestFilter.lambda$intercept$0(SecurityRestFilter.java:81)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.action.ActionListener$2.onResponse(ActionListener.java:257)
	at org.elasticsearch.security@9.0.0-SNAPSHOT/org.elasticsearch.xpack.security.authc.support.SecondaryAuthenticator.lambda$authenticateAndAttachToContext$3(SecondaryAuthenticator.java:99)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.action.ActionListenerImplementations$ResponseWrappingActionListener.onResponse(ActionListenerImplementations.java:247)
	at org.elasticsearch.security@9.0.0-SNAPSHOT/org.elasticsearch.xpack.security.authc.support.SecondaryAuthenticator.authenticate(SecondaryAuthenticator.java:109)
	at org.elasticsearch.security@9.0.0-SNAPSHOT/org.elasticsearch.xpack.security.authc.support.SecondaryAuthenticator.authenticateAndAttachToContext(SecondaryAuthenticator.java:90)
	at org.elasticsearch.security@9.0.0-SNAPSHOT/org.elasticsearch.xpack.security.rest.SecurityRestFilter.intercept(SecurityRestFilter.java:75)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:460)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestController.tryAllHandlers(RestController.java:624)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:307)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.http.AbstractHttpServerTransport.dispatchRequest(AbstractHttpServerTransport.java:488)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.http.AbstractHttpServerTransport.handleIncomingRequest(AbstractHttpServerTransport.java:584)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.http.AbstractHttpServerTransport.incomingRequest(AbstractHttpServerTransport.java:461)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpPipeliningHandler.handlePipelinedRequest(Netty4HttpPipeliningHandler.java:170)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpPipeliningHandler.channelRead(Netty4HttpPipeliningHandler.java:149)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4LeakDetectionHandler.channelRead(Netty4LeakDetectionHandler.java:38)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.codec@4.1.115.Final/io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:107)
	at io.netty.codec@4.1.115.Final/io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:120)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpContentSizeHandler.handleRequest(Netty4HttpContentSizeHandler.java:150)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpContentSizeHandler.channelRead(Netty4HttpContentSizeHandler.java:106)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpAggregator.channelRead(Netty4HttpAggregator.java:52)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.codec@4.1.115.Final/io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:107)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpHeaderValidator.forwardData(Netty4HttpHeaderValidator.java:213)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpHeaderValidator.forwardFullRequest(Netty4HttpHeaderValidator.java:156)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpHeaderValidator$1.lambda$onResponse$0(Netty4HttpHeaderValidator.java:128)
	at io.netty.common@4.1.115.Final/io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173)
	at io.netty.common@4.1.115.Final/io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166)
	at io.netty.common@4.1.115.Final/io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
	at io.netty.transport@4.1.115.Final/io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:566)
	at io.netty.common@4.1.115.Final/io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
	at io.netty.common@4.1.115.Final/io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at java.base/java.lang.Thread.run(Thread.java:1583)

[2025-01-23T09:44:59,735][WARN ][o.e.h.AbstractHttpServerTransport] [runTask-0] caught exception while handling client http traffic, closing connection Netty4HttpChannel{localAddress=/[0:0:0:0:0:0:0:1]:9200, remoteAddress=/[0:0:0:0:0:0:0:1]:51276} java.lang.Exception: java.lang.AssertionError
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpPipeliningHandler.exceptionCaught(Netty4HttpPipeliningHandler.java:504)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeExceptionCaught(AbstractChannelHandlerContext.java:346)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:447)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4LeakDetectionHandler.channelRead(Netty4LeakDetectionHandler.java:38)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.codec@4.1.115.Final/io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:107)
	at io.netty.codec@4.1.115.Final/io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:120)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpContentSizeHandler.handleRequest(Netty4HttpContentSizeHandler.java:150)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpContentSizeHandler.channelRead(Netty4HttpContentSizeHandler.java:106)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpAggregator.channelRead(Netty4HttpAggregator.java:52)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at io.netty.codec@4.1.115.Final/io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:107)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpHeaderValidator.forwardData(Netty4HttpHeaderValidator.java:213)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpHeaderValidator.forwardFullRequest(Netty4HttpHeaderValidator.java:156)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpHeaderValidator$1.lambda$onResponse$0(Netty4HttpHeaderValidator.java:128)
	at io.netty.common@4.1.115.Final/io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173)
	at io.netty.common@4.1.115.Final/io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166)
	at io.netty.common@4.1.115.Final/io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
	at io.netty.transport@4.1.115.Final/io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:566)
	at io.netty.common@4.1.115.Final/io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
	at io.netty.common@4.1.115.Final/io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: java.lang.AssertionError
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.http.HttpBody.asFull(HttpBody.java:42)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestRequest.content(RestRequest.java:313)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestRequest.requiredContent(RestRequest.java:341)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.action.document.RestIndexAction.prepareRequest(RestIndexAction.java:109)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.BaseRestHandler.handleRequest(BaseRestHandler.java:99)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestController$1.onResponse(RestController.java:466)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestController$1.onResponse(RestController.java:460)
	at org.elasticsearch.security@9.0.0-SNAPSHOT/org.elasticsearch.xpack.security.rest.SecurityRestFilter.doHandleRequest(SecurityRestFilter.java:89)
	at org.elasticsearch.security@9.0.0-SNAPSHOT/org.elasticsearch.xpack.security.rest.SecurityRestFilter.lambda$intercept$0(SecurityRestFilter.java:81)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.action.ActionListener$2.onResponse(ActionListener.java:257)
	at org.elasticsearch.security@9.0.0-SNAPSHOT/org.elasticsearch.xpack.security.authc.support.SecondaryAuthenticator.lambda$authenticateAndAttachToContext$3(SecondaryAuthenticator.java:99)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.action.ActionListenerImplementations$ResponseWrappingActionListener.onResponse(ActionListenerImplementations.java:247)
	at org.elasticsearch.security@9.0.0-SNAPSHOT/org.elasticsearch.xpack.security.authc.support.SecondaryAuthenticator.authenticate(SecondaryAuthenticator.java:109)
	at org.elasticsearch.security@9.0.0-SNAPSHOT/org.elasticsearch.xpack.security.authc.support.SecondaryAuthenticator.authenticateAndAttachToContext(SecondaryAuthenticator.java:90)
	at org.elasticsearch.security@9.0.0-SNAPSHOT/org.elasticsearch.xpack.security.rest.SecurityRestFilter.intercept(SecurityRestFilter.java:75)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:460)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestController.tryAllHandlers(RestController.java:624)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:307)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.http.AbstractHttpServerTransport.dispatchRequest(AbstractHttpServerTransport.java:488)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.http.AbstractHttpServerTransport.handleIncomingRequest(AbstractHttpServerTransport.java:584)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.http.AbstractHttpServerTransport.incomingRequest(AbstractHttpServerTransport.java:461)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpPipeliningHandler.handlePipelinedRequest(Netty4HttpPipeliningHandler.java:170)
	at org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT/org.elasticsearch.http.netty4.Netty4HttpPipeliningHandler.channelRead(Netty4HttpPipeliningHandler.java:149)
	at io.netty.transport@4.1.115.Final/io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442)
	... 31 more

If you do NOT have assertions enabled, you get this response:

{
  "error" : {
    "root_cause" : [
      {
        "type" : "class_cast_exception",
        "reason" : "class org.elasticsearch.http.netty4.Netty4HttpRequestBodyStream cannot be cast to class org.elasticsearch.http.HttpBody$Full (org.elasticsearch.http.netty4.Netty4HttpRequestBodyStream is in module org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT of loader jdk.internal.loader.Loader @3cd206b5; org.elasticsearch.http.HttpBody$Full is in module org.elasticsearch.server@9.0.0-SNAPSHOT of loader 'app')"
      }
    ],
    "type" : "class_cast_exception",
    "reason" : "class org.elasticsearch.http.netty4.Netty4HttpRequestBodyStream cannot be cast to class org.elasticsearch.http.HttpBody$Full (org.elasticsearch.http.netty4.Netty4HttpRequestBodyStream is in module org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT of loader jdk.internal.loader.Loader @3cd206b5; org.elasticsearch.http.HttpBody$Full is in module org.elasticsearch.server@9.0.0-SNAPSHOT of loader 'app')"
  },
  "status" : 500
}

And this in the logs:

[2025-01-23T10:36:14,458][WARN ][r.suppressed             ] [Pelennor] path: /logs-foo-bar/_doc/_bulk, params: {pretty=true, index=logs-foo-bar, id=_bulk}, status: 500java.lang.ClassCastException: class org.elasticsearch.http.netty4.Netty4HttpRequestBodyStream cannot be cast to class org.elasticsearch.http.HttpBody$Full (org.elasticsearch.http.netty4.Netty4HttpRequestBodyStream is in module org.elasticsearch.transport.netty4@9.0.0-SNAPSHOT of loader jdk.internal.loader.Loader @3cd206b5; org.elasticsearch.http.HttpBody$Full is in module org.elasticsearch.server@9.0.0-SNAPSHOT of loader 'app')
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.http.HttpBody.asFull(HttpBody.java:43)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestRequest.content(RestRequest.java:313)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.RestRequest.requiredContent(RestRequest.java:341)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.action.document.RestIndexAction.prepareRequest(RestIndexAction.java:109)
	at org.elasticsearch.server@9.0.0-SNAPSHOT/org.elasticsearch.rest.BaseRestHandler.handleRequest(BaseRestHandler.java:99)

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