Runtime field fieldName was set to null but its removal is not supported – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.12-7.15

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Briefly, this error occurs when you try to set a runtime field to null in Elasticsearch, which is not supported. Runtime fields are designed to be always present and cannot be removed or set to null. To resolve this issue, you can either change the value of the field to something other than null or use a different field type that supports null values. Alternatively, you can use a script to handle null values in a way that suits your application’s needs.

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This guide will help you check for common problems that cause the log ” Runtime field [” + fieldName + “] was set to null but its removal is not supported ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “Runtime field [” + fieldName + “] was set to null but its removal is not supported ” class name is RuntimeField.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 String fieldName = entry.getKey();
 if (entry.getValue() == null) {
 if (supportsRemoval) {
 runtimeFields.put(fieldName; null);
 } else {
 throw new MapperParsingException("Runtime field [" + fieldName + "] was set to null but its removal is not supported " +
 "in this context");
 }
 } else if (entry.getValue() instanceof Map) {
 @SuppressWarnings("unchecked")
 Map propNode = new HashMap<>(((Map) entry.getValue()));

 

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