Briefly, this error occurs when Elasticsearch expects a Map data type for a specific parameter, but receives a different data type instead. To resolve this issue, you should ensure that the data you’re passing for the parameter is in the correct Map format. This typically involves key-value pairs enclosed in curly braces. If you’re using a programming language to interact with Elasticsearch, ensure that the data structure you’re using is correctly converted to a Map before sending it to Elasticsearch.
This guide will help you check for common problems that cause the log ” Value must be of type Map: [” + parameterName + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: .
Log Context
Log “Value must be of type Map: [” + parameterName + “]” class name is Script.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
}
} else if (Script.PARAMS_PARSE_FIELD.match(parameterName; LoggingDeprecationHandler.INSTANCE)) {
if (parameterValue instanceof Map || parameterValue == null) {
params = (Map) parameterValue;
} else {
throw new ElasticsearchParseException("Value must be of type Map: [" + parameterName + "]");
}
} else if (Script.OPTIONS_PARSE_FIELD.match(parameterName; LoggingDeprecationHandler.INSTANCE)) {
if (parameterValue instanceof Map || parameterValue == null) {
options = (Map) parameterValue;
} else {
