﻿---
title: NoSuchMethodError when creating a client
description: In certain contexts you may encounter an error when creating the ElasticsearchClient saying that the method RequestOptions$Builder.removeHeader does not...
url: https://www.elastic.co/elastic/docs-builder/docs/2915/reference/elasticsearch/clients/java/troubleshooting/no-such-method-request-options
products:
  - Elasticsearch
  - Elasticsearch Client
  - Elasticsearch Java Client
---

# NoSuchMethodError when creating a client
In certain contexts you may encounter an error when creating the `ElasticsearchClient` saying that the method `RequestOptions$Builder.removeHeader` does not exist:
```java
java.lang.NoSuchMethodError: 'org.elasticsearch.client.RequestOptions$Builder org.elasticsearch.client.RequestOptions$Builder.removeHeader(java.lang.String)'
```

This method was introduced in `elasticsearch-rest-client` version 7.16.0. The error happens because your project is using an older version of this dependency.
This happens in particular when the project is using the [Spring Boot Maven Plugin](https://docs.spring.io/spring-boot/docs/current/maven-plugin/reference/htmlsingle/), as this plugin [defines versions for commonly used libraries](https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot-dependencies/build.gradle), including `elasticsearch-rest-client`. Depending on the version of Spring Boot used in the project, that version may be outdated.
To solve this issue, you have to add the `elasticsearch-rest-client` dependency explicitly in your project, with the same version as `elasticsearch-java` (see also [Installation](https://www.elastic.co/elastic/docs-builder/docs/2915/reference/elasticsearch/clients/java/setup/installation)).
Using Gradle:
```groovy
implementation 'org.elasticsearch.client:elasticsearch-rest-client:9.3.0'
```

Using Maven:
```xml
<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-client</artifactId>
    <version>9.3.0</version>
</dependency>
```