Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is ElasticsearchStatusException[Elasticsearch exception [type=search_phase_execution_exception, reason=all shards failed]]; nested: ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception, reason=Fielddata is disabled on text fields by default. Set fielddata=true on [category] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.]]; nested: ElasticsearchException[Elasticsearch exception [type=illegal_argument_exception, reason=Fielddata is disabled on text fields by default. Set fielddata=true on [category] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.]];] with root cause

这个异常信息是关于 Elasticsearch 的，大致意思是：在执行搜索时，所有分片都失败了。原因是在查询中使用了文本字段（text fields）的聚合（aggregation）功能，但是默认情况下，文本字段是禁用了 Fielddata（一个 ElasticSearch 中的内存结构，用于支持聚合、排序等操作）的。要解决这个问题，可以在查询中设置 `fielddata=true`，或者使用关键字字段（keyword field）代替文本字段。

相关问题

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception

根据提供的引用内容， Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is （这里是包名）] with root cause. Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause.和44.892 ERROR 13764 --- [nio-8081-exec-9] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed;... ，我可以告诉你的是这是一个关于Servlet的异常信息。具体来说，是当在处理请求时，由于某种原因导致了异常。异常的具体原因可能是包名（引用中的内容），也可能是java.lang.NullPointerException（引用中的内容）。这个异常信息表明在处理请求时发生了错误，导致请求处理失败（引用中的内容）。根据提供的信息，无法确定具体的异常原因，需要进一步的调查和排查才能确定问题的根本原因。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *2* [异常报错：Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception](https://blog.csdn.net/Alian_auerua/article/details/129633633)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
- *3* [Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception](https://download.csdn.net/download/weixin_38517997/14852674)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
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r servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested e

异常信息是Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is com.suntang.common.exception.RRException: 用户账号已被占用] with root cause。造成这个异常的原因是用户账号已被占用。
另外，还有一个异常信息是Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed;...].这可能是由于URL不存在或与项目的根路径冲突导致的。因此，需要检查URL是否正确匹配。
还有一个异常信息是Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://localhost/8081:user/1": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect] with root cause java.net.ConnectException: Connection refused: connect。这个异常可能是由于连接被拒绝导致的，可能是因为URL不存在或无法连接到指定的地址。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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- *2* [Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception](https://download.csdn.net/download/weixin_38517997/14852674)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 33.333333333333336%"]
- *3* [Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request](https://blog.csdn.net/weixin_47164204/article/details/126218723)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 33.333333333333336%"]
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