Empty request body – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 2.4-2.9

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Briefly, this error occurs when OpenSearch receives a request that doesn’t contain any data in the body. This could be due to a faulty client application or a misconfigured API call. To resolve this issue, ensure that your client application or API call is correctly formatted and includes the necessary data in the request body. Also, check your OpenSearch server logs for more detailed information about the error. If the problem persists, consider debugging your client application or API call to identify and fix any issues.

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This guide will help you check for common problems that cause the log ” Empty request body ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: cluster, admin, routing, delete, request, shards.

Log Context

Log “Empty request body” class name is ClusterDeleteWeightedRoutingRequest.java. We extracted the following from OpenSearch source code for those seeking an in-depth context :

 * @return this request
 public ClusterDeleteWeightedRoutingRequest source(Map source) {
 try {
 if (source.isEmpty()) {
 throw new OpenSearchParseException(("Empty request body"));
 XContentBuilder builder = XContentFactory.jsonBuilder();
 setRequestBody(BytesReference.bytes(builder); builder.contentType());
 } catch (IOException e) {


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