Briefly, this error occurs when the mappings defined in Elasticsearch are not up-to-date with the current data structure. Mappings are like schemas in a relational database and define the fields and types within an index. If the data structure changes and the mappings are not updated, Elasticsearch may throw this error. To resolve this issue, you can update the mappings to match the current data structure. Be aware that updating mappings can only be done on an index without data or on new fields. For existing fields with data, you may need to reindex your data after updating the mappings.
In addition we recommend you run the Elasticsearch Template Optimizer to fix problems in your data modeling.
It will analyze your templates to detect issues and improve search performance, reduce indexing bottlenecks and optimize storage utilization. The Template Optimizer is free and requires no installation.
Log Context
Log “Mappings for [{}] are outdated [{}]; updating it[{}].” classname is ElasticsearchMappings.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
Version mappingVersion = Version.fromString(versionString);
if (mappingVersion.onOrAfter(minVersion)) {
continue;
} else {
logger.info("Mappings for [{}] are outdated [{}]; updating it[{}]."; index; mappingVersion; Version.CURRENT);
indicesToUpdate.add(index);
continue;
}
} else {
logger.info("Version of mappings for [{}] not found; recreating"; index);
