Key=value pairs are not supported in annotations – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when you try to use key=value pairs in Elasticsearch annotations, which is not supported. Annotations are used to add extra information to documents but they don’t support this format. To resolve this issue, you can either remove the key=value pairs from your annotations or change them into a supported format. For instance, you could use a JSON object to store your data, which allows for key-value pairs. Always ensure that your annotations are in a format that Elasticsearch can understand to avoid such errors.

This guide will help you check for common problems that cause the log ” key=value pairs are not supported in annotations ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index, plugins.

Log Context

Log “key=value pairs are not supported in annotations” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 String[] pairs ="&");
 String value = null;
 for (String pair : pairs) {
 String[] kv = pair.split("=");
 if (kv.length == 2) {
 throw new ElasticsearchParseException("key=value pairs are not supported in annotations");
 if (kv.length == 1) {
 // Check "=" sign wasn't in the pair string
 if (kv[0].length() == pair.length()) {
 // untyped value


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