ES查询报错：entity content is too long [142501157] for the configured buffer limit [104857600]

java - org.apache.http.ContentTooLongException: entity content is too long [105539255] for the configured buffer limit [104857600] - Stack Overflow

在生产环境批量同步数据的时候，我写了一个查询请求，然后直接报错：entity content is too long [142501157] for the configured buffer limit [104857600]

具体内容如下：

Caused by: org.apache.http.ContentTooLongException: entity content is too long [142501157] for the configured buffer limit [104857600]at org.elasticsearch.client.HeapBufferedAsyncResponseConsumer.onEntityEnclosed(HeapBufferedAsyncResponseConsumer.java:76)at org.apache.http.nio.protocol.AbstractAsyncResponseConsumer.responseReceived(AbstractAsyncResponseConsumer.java:137)at org.apache.http.impl.nio.client.MainClientExec.responseReceived(MainClientExec.java:315)at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.responseReceived(DefaultClientExchangeHandlerImpl.java:151)at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.responseReceived(HttpAsyncRequestExecutor.java:315)at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:255)at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:81)at org.apache.http.impl.nio.client.InternalIODispatch.onInputReady(InternalIODispatch.java:39)at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:114)at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:162)at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:337)at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315)at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276)at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591)at java.lang.Thread.run(Thread.java:748)Suppressed: org.apache.http.ContentTooLongException: entity content is too long [142501157] for the configured buffer limit [104857600]... 16 moreSuppressed: org.apache.http.ContentTooLongException: entity content is too long [142501157] for the configured buffer limit [104857600]... 16 more

在HttpAsyncResponseConsumerFactory类中：

在HeapBufferedAsyncResponseConsumer类中有一个判断：返回的内容长度大于限定的100MB就会抛出ContentTooLongException异常。

我这里用的依赖是：

            <dependency><groupId>org.elasticsearch.client</groupId><artifactId>elasticsearch-rest-client</artifactId><version>6.6.2</version></dependency><dependency><groupId>org.elasticsearch.client</groupId><artifactId>transport</artifactId><version>6.6.2</version></dependency><dependency><groupId>org.elasticsearch.client</groupId><artifactId>elasticsearch-rest-high-level-client</artifactId><version>6.6.2</version></dependency><dependency><groupId>org.elasticsearch</groupId><artifactId>elasticsearch</artifactId><version>6.6.2</version></dependency>

而我们对es进行查询操作，或者其他增删改操作是，都会默认使用如下的RequestOptions.DEFAULT

进入RequestOptions.DEFAULT看它的代码：这里用了HeapBufferedResponseConsumerFactory.DEFAULT

而这个HeapBufferedResponseConsumerFactory.DEFAULT,就是我们之前看到的，已经被限制了100MB返回值的HeapBufferedResponseConsumerFactory。

所以有两种方式可以解决这个bug。

方式一：

不使用默认的RequestOptions.DEFAULT，而通过使用自定义RequestOptions的方式（ES官方api已经给我们开放出来了）：

RequestOptions.Builder builder = RequestOptions.DEFAULT.toBuilder();
builder.setHttpAsyncResponseConsumerFactory(new HttpAsyncResponseConsumerFactory//修改为500MB.HeapBufferedResponseConsumerFactory(500 * 1024 * 1024));

RequestOptions requestOptions=builder.build();

方式二：

如果不方便修改怎么办，例如我们使用的是Spring Data ElasticSearch或者是其他的一些框架，而它默认使用的也是RequestOptions.DEFAULT

这时候我们可以通过java反射进行修改：

        //设置es查询buffer大小RequestOptions requestOptions = RequestOptions.DEFAULT;Class<? extends RequestOptions> reqClass = requestOptions.getClass();Field reqField = reqClass.getDeclaredField("httpAsyncResponseConsumerFactory");reqField.setAccessible(true);//去除finalField modifiersField = Field.class.getDeclaredField("modifiers");modifiersField.setAccessible(true);modifiersField.setInt(reqField, reqField.getModifiers() & ~Modifier.FINAL);//设置默认的工厂reqField.set(requestOptions, new HttpAsyncResponseConsumerFactory() {@Overridepublic HttpAsyncResponseConsumer<HttpResponse> createHttpAsyncResponseConsumer() {//500MBreturn new HeapBufferedAsyncResponseConsumer(5 * 100 * 1024 * 1024);}});

如果你使用的是springmvc，那么可以把这段代码加入到拦截器中，这样可以拦截需要自定义返回值大小的es请求