# Reindex request failure causes error parsing exception

**URL:** <https://discuss.elastic.co/t/reindex-request-failure-causes-error-parsing-exception/374944>\
**Category:** Elasticsearch\
**Tags:** language-clients\
**Created:** [February 24, 2025, 12:58pm UTC](https://discuss.elastic.co/t/reindex-request-failure-causes-error-parsing-exception/374944 "2025-02-24T12:58:07Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![svtd](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/svtd/32/125365_2.png) [@svtd](https://discuss.elastic.co/u/svtd)\
**Post date:** [February 24, 2025, 12:58pm UTC](https://discuss.elastic.co/t/reindex-request-failure-causes-error-parsing-exception/374944/1 "2025-02-24T12:58:07Z")

</div>

Elasticsearch version and Elasticsearch Java client version: 8.13.4

Hi!  
When destination index is read only, reindex request expectedly fail, but Elastic Java client is not able to parse the failure response with the following exception:

```auto
co.elastic.clients.transport.TransportException: node: http://localhost:9200/, status: 403, [es/reindex] Failed to decode error response, check exception cause for additional details
	at co.elastic.clients.transport.ElasticsearchTransportBase.getApiResponse(ElasticsearchTransportBase.java:357) ~[elasticsearch-java-8.13.4.jar:?]
	at co.elastic.clients.transport.ElasticsearchTransportBase.lambda$performRequestAsync$0(ElasticsearchTransportBase.java:211) ~[elasticsearch-java-8.13.4.jar:?]
	at java.base/java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:934) ~[?:?]
	at java.base/java.util.concurrent.CompletableFuture$UniHandle.tryFire(CompletableFuture.java:911) ~[?:?]
	at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510) ~[?:?]
	at java.base/java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:2179) ~[?:?]
	at co.elastic.clients.transport.rest_client.RestClientHttpClient$1.onSuccess(RestClientHttpClient.java:115) ~[elasticsearch-java-8.13.4.jar:?]
	at org.elasticsearch.client.RestClient$FailureTrackingResponseListener.onSuccess(RestClient.java:680) ~[elasticsearch-rest-client-8.13.4.jar:8.13.4]
	at org.elasticsearch.client.RestClient$1.completed(RestClient.java:403) ~[elasticsearch-rest-client-8.13.4.jar:8.13.4]
	at org.elasticsearch.client.RestClient$1.completed(RestClient.java:397) ~[elasticsearch-rest-client-8.13.4.jar:8.13.4]
	at org.apache.http.concurrent.BasicFuture.completed(BasicFuture.java:122) ~[httpcore-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.responseCompleted(DefaultClientExchangeHandlerImpl.java:182) ~[httpasyncclient-4.1.5.jar:4.1.5]
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.processResponse(HttpAsyncRequestExecutor.java:448) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.inputReady(HttpAsyncRequestExecutor.java:338) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:265) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:87) ~[httpasyncclient-4.1.5.jar:4.1.5]
	at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:40) ~[httpasyncclient-4.1.5.jar:4.1.5]
	at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:114) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:162) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:337) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591) ~[httpcore-nio-4.4.16.jar:4.4.16]
	... 1 more
Caused by: co.elastic.clients.json.UnexpectedJsonEventException: Unexpected JSON event 'VALUE_NUMBER' instead of 'KEY_NAME'
	at co.elastic.clients.json.JsonpUtils.expectEvent(JsonpUtils.java:106) ~[elasticsearch-java-8.13.4.jar:?]
	at co.elastic.clients.transport.endpoints.EndpointBase$1.deserialize(EndpointBase.java:150) ~[elasticsearch-java-8.13.4.jar:?]
	at co.elastic.clients.transport.endpoints.EndpointBase$1.deserialize(EndpointBase.java:144) ~[elasticsearch-java-8.13.4.jar:?]
	at co.elastic.clients.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:77) ~[elasticsearch-java-8.13.4.jar:?]
	at co.elastic.clients.transport.ElasticsearchTransportBase.getApiResponse(ElasticsearchTransportBase.java:343) ~[elasticsearch-java-8.13.4.jar:?]
	at co.elastic.clients.transport.ElasticsearchTransportBase.lambda$performRequestAsync$0(ElasticsearchTransportBase.java:211) ~[elasticsearch-java-8.13.4.jar:?]
	at java.base/java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:934) ~[?:?]
	at java.base/java.util.concurrent.CompletableFuture$UniHandle.tryFire(CompletableFuture.java:911) ~[?:?]
	at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510) ~[?:?]
	at java.base/java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:2179) ~[?:?]
	at co.elastic.clients.transport.rest_client.RestClientHttpClient$1.onSuccess(RestClientHttpClient.java:115) ~[elasticsearch-java-8.13.4.jar:?]
	at org.elasticsearch.client.RestClient$FailureTrackingResponseListener.onSuccess(RestClient.java:680) ~[elasticsearch-rest-client-8.13.4.jar:8.13.4]
	at org.elasticsearch.client.RestClient$1.completed(RestClient.java:403) ~[elasticsearch-rest-client-8.13.4.jar:8.13.4]
	at org.elasticsearch.client.RestClient$1.completed(RestClient.java:397) ~[elasticsearch-rest-client-8.13.4.jar:8.13.4]
	at org.apache.http.concurrent.BasicFuture.completed(BasicFuture.java:122) ~[httpcore-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.responseCompleted(DefaultClientExchangeHandlerImpl.java:182) ~[httpasyncclient-4.1.5.jar:4.1.5]
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.processResponse(HttpAsyncRequestExecutor.java:448) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.inputReady(HttpAsyncRequestExecutor.java:338) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:265) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:87) ~[httpasyncclient-4.1.5.jar:4.1.5]
	at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:40) ~[httpasyncclient-4.1.5.jar:4.1.5]
	at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:114) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:162) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:337) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104) ~[httpcore-nio-4.4.16.jar:4.4.16]
	at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591) ~[httpcore-nio-4.4.16.jar:4.4.16]

```

When I try with Postman, the response looks like this:

```auto
{
    "took": 215,
    "timed_out": false,
    "total": 6535,
    "updated": 0,
    "created": 0,
    "deleted": 0,
    "batches": 1,
    "version_conflicts": 0,
    "noops": 0,
    "retries": {
        "bulk": 0,
        "search": 0
    },
    "throttled_millis": 0,
    "requests_per_second": -1.0,
    "throttled_until_millis": 0,
    "failures": [
        {
            "index": "<name>",
            "id": "2251799813689457",
            "cause": {
                "type": "cluster_block_exception",
                "reason": "index [<name>] blocked by: [FORBIDDEN/5/index read-only (api)];"
            },
            "status": 403
        },
        <..>
]
}

```

As a result of parsing error I can't see the proper error message in my application. Does this sound like a bug?

---

<div class="post-metadata">

**Author:** ![ltrotta](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ltrotta/32/124003_2.png) [@ltrotta](https://discuss.elastic.co/u/ltrotta)\
**Post date:** [February 24, 2025, 2:17pm UTC](https://discuss.elastic.co/t/reindex-request-failure-causes-error-parsing-exception/374944/2 "2025-02-24T14:17:46Z")

</div>

Hello!  
Yes it does sound like a bug ^^"  
The [specification](https://github.com/elastic/elasticsearch-specification/blob/1698bc080d1ab9b0effc010362beba0f8398f16c/specification/_global/reindex/ReindexResponse.ts#L26) for the response class seems wrong, and so is the generated java code: in `failures`, `type` is a required field outside `cause`, while here it's found inside `cause`. Will fix this asap and regenerate the java code!  
Unfortunately version 8.13 is no longer supported for patches so the minimum version that will be updated is 8.16.

---

<div class="post-metadata">

**Author:** ![svtd](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/svtd/32/125365_2.png) [@svtd](https://discuss.elastic.co/u/svtd)\
**Post date:** [February 24, 2025, 2:36pm UTC](https://discuss.elastic.co/t/reindex-request-failure-causes-error-parsing-exception/374944/3 "2025-02-24T14:36:02Z")

</div>

@ltrotta Thank you for checking this!  
Is there some bug issue that I can follow?

---

<div class="post-metadata">

**Author:** ![ltrotta](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ltrotta/32/124003_2.png) [@ltrotta](https://discuss.elastic.co/u/ltrotta)\
**Post date:** [February 24, 2025, 2:46pm UTC](https://discuss.elastic.co/t/reindex-request-failure-causes-error-parsing-exception/374944/4 "2025-02-24T14:46:12Z")

</div>

You can [create a new one](https://github.com/elastic/elasticsearch-java/issues) in the github repo. Thanks!

---

<div class="post-metadata">

**Author:** ![svtd](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/svtd/32/125365_2.png) [@svtd](https://discuss.elastic.co/u/svtd)\
**Post date:** [February 24, 2025, 3:50pm UTC](https://discuss.elastic.co/t/reindex-request-failure-causes-error-parsing-exception/374944/5 "2025-02-24T15:50:49Z")

</div>

> <https://github.com/elastic/elasticsearch-java/issues/949>
>
> \### Java API client version
> 
> 8.13.4
> 
> \### Java version
> 
> 21
> 
> \### Elasticsearch Ver…sion
> 
> 8.13.4
> 
> \### Problem description
> 
> Forum thread: https://discuss.elastic.co/t/reindex-request-failure-causes-error-parsing-exception/374944/1
> 
> When destination index is read only, reindex request expectedly fail, but Elastic Java client is not able to parse the failure response with the following exception:
> 
> \`\`\`
> co.elastic.clients.transport.TransportException: node: http://localhost:9200/, status: 403, \[es/reindex\] Failed to decode error response, check exception cause for additional details
> at co.elastic.clients.transport.ElasticsearchTransportBase.getApiResponse(ElasticsearchTransportBase.java:357) ~\[elasticsearch-java-8.13.4.jar:?\]
> at co.elastic.clients.transport.ElasticsearchTransportBase.lambda$performRequestAsync$0(ElasticsearchTransportBase.java:211) ~\[elasticsearch-java-8.13.4.jar:?\]
> at java.base/java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:934) ~\[?:?\]
> at java.base/java.util.concurrent.CompletableFuture$UniHandle.tryFire(CompletableFuture.java:911) ~\[?:?\]
> at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510) ~\[?:?\]
> at java.base/java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:2179) ~\[?:?\]
> at co.elastic.clients.transport.rest\_client.RestClientHttpClient$1.onSuccess(RestClientHttpClient.java:115) ~\[elasticsearch-java-8.13.4.jar:?\]
> at org.elasticsearch.client.RestClient$FailureTrackingResponseListener.onSuccess(RestClient.java:680) ~\[elasticsearch-rest-client-8.13.4.jar:8.13.4\]
> at org.elasticsearch.client.RestClient$1.completed(RestClient.java:403) ~\[elasticsearch-rest-client-8.13.4.jar:8.13.4\]
> at org.elasticsearch.client.RestClient$1.completed(RestClient.java:397) ~\[elasticsearch-rest-client-8.13.4.jar:8.13.4\]
> at org.apache.http.concurrent.BasicFuture.completed(BasicFuture.java:122) ~\[httpcore-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.responseCompleted(DefaultClientExchangeHandlerImpl.java:182) ~\[httpasyncclient-4.1.5.jar:4.1.5\]
> at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.processResponse(HttpAsyncRequestExecutor.java:448) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.inputReady(HttpAsyncRequestExecutor.java:338) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:265) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:87) ~\[httpasyncclient-4.1.5.jar:4.1.5\]
> at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:40) ~\[httpasyncclient-4.1.5.jar:4.1.5\]
> at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:114) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:162) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:337) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> ... 1 more
> Caused by: co.elastic.clients.json.UnexpectedJsonEventException: Unexpected JSON event 'VALUE\_NUMBER' instead of 'KEY\_NAME'
> at co.elastic.clients.json.JsonpUtils.expectEvent(JsonpUtils.java:106) ~\[elasticsearch-java-8.13.4.jar:?\]
> at co.elastic.clients.transport.endpoints.EndpointBase$1.deserialize(EndpointBase.java:150) ~\[elasticsearch-java-8.13.4.jar:?\]
> at co.elastic.clients.transport.endpoints.EndpointBase$1.deserialize(EndpointBase.java:144) ~\[elasticsearch-java-8.13.4.jar:?\]
> at co.elastic.clients.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:77) ~\[elasticsearch-java-8.13.4.jar:?\]
> at co.elastic.clients.transport.ElasticsearchTransportBase.getApiResponse(ElasticsearchTransportBase.java:343) ~\[elasticsearch-java-8.13.4.jar:?\]
> at co.elastic.clients.transport.ElasticsearchTransportBase.lambda$performRequestAsync$0(ElasticsearchTransportBase.java:211) ~\[elasticsearch-java-8.13.4.jar:?\]
> at java.base/java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:934) ~\[?:?\]
> at java.base/java.util.concurrent.CompletableFuture$UniHandle.tryFire(CompletableFuture.java:911) ~\[?:?\]
> at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510) ~\[?:?\]
> at java.base/java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:2179) ~\[?:?\]
> at co.elastic.clients.transport.rest\_client.RestClientHttpClient$1.onSuccess(RestClientHttpClient.java:115) ~\[elasticsearch-java-8.13.4.jar:?\]
> at org.elasticsearch.client.RestClient$FailureTrackingResponseListener.onSuccess(RestClient.java:680) ~\[elasticsearch-rest-client-8.13.4.jar:8.13.4\]
> at org.elasticsearch.client.RestClient$1.completed(RestClient.java:403) ~\[elasticsearch-rest-client-8.13.4.jar:8.13.4\]
> at org.elasticsearch.client.RestClient$1.completed(RestClient.java:397) ~\[elasticsearch-rest-client-8.13.4.jar:8.13.4\]
> at org.apache.http.concurrent.BasicFuture.completed(BasicFuture.java:122) ~\[httpcore-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.responseCompleted(DefaultClientExchangeHandlerImpl.java:182) ~\[httpasyncclient-4.1.5.jar:4.1.5\]
> at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.processResponse(HttpAsyncRequestExecutor.java:448) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.inputReady(HttpAsyncRequestExecutor.java:338) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:265) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:87) ~\[httpasyncclient-4.1.5.jar:4.1.5\]
> at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:40) ~\[httpasyncclient-4.1.5.jar:4.1.5\]
> at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:114) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:162) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:337) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591) ~\[httpcore-nio-4.4.16.jar:4.4.16\]
> \`\`\`
> 
> When I try with Postman, the response looks like this:
> \`\`\`
> {
> "took": 215,
> "timed\_out": false,
> "total": 6535,
> "updated": 0,
> "created": 0,
> "deleted": 0,
> "batches": 1,
> "version\_conflicts": 0,
> "noops": 0,
> "retries": {
> "bulk": 0,
> "search": 0
> },
> "throttled\_millis": 0,
> "requests\_per\_second": -1.0,
> "throttled\_until\_millis": 0,
> "failures": \[
> {
> "index": "\<name\>",
> "id": "2251799813689457",
> "cause": {
> "type": "cluster\_block\_exception",
> "reason": "index \[\<name\>\] blocked by: \[FORBIDDEN/5/index read-only (api)\];"
> },
> "status": 403
> },
> \<..\>
> \`\`\`