Briefly, this error occurs when Elasticsearch cannot find a value in the mappings for the meta field. This usually happens when the mappings are not updated or synchronized with the current data structure. To resolve this issue, you can update the mappings to match the current data structure. Alternatively, you can reindex your data with the correct mappings. If the error persists, check your Elasticsearch version as older versions may have compatibility issues with certain mapping configurations.
This guide will help you check for common problems that cause the log ” No value found in mappings for [_meta.{}]; assuming mappings update required ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: indices.
Log Context
Log “No value found in mappings for [_meta.{}]; assuming mappings update required” classname is SystemIndexMappingUpdateService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
// version here. We should just replace the template to be sure.
return Version.V_EMPTY;
}
final String versionString = rawVersion != null ? rawVersion.toString() : null;
if (versionString == null) {
logger.warn("No value found in mappings for [_meta.{}]; assuming mappings update required"; descriptor.getVersionMetaKey());
// If we called `Version.fromString(null)`; it would return `Version.CURRENT` and we wouldn't update the mappings
return Version.V_EMPTY;
}
return Version.fromString(versionString);
} catch (ElasticsearchParseException | IllegalArgumentException e) {
