To avoid immense term error in metrics metadata fields:
meta.error-description field mapping changes from keyword to wildcard which fits this type of content better while still allowing the search,
remaining dynamically mapped text fields get "ignore_above": 8191 parameter to prevent immense term error in the worst case of error message being composed entirely of UTF-8 characters (see doc),
meta.error-description field generated in BulkIndex runner gets limited to 5 unique errors only for better log readability - currently, in the worst case the field is concatenated from errors from all bulk documents.
To avoid immense term error in metrics metadata fields:
meta.error-descriptionfield mapping changes fromkeywordtowildcardwhich fits this type of content better while still allowing the search,"ignore_above": 8191parameter to prevent immense term error in the worst case of error message being composed entirely of UTF-8 characters (see doc),meta.error-descriptionfield generated inBulkIndexrunner gets limited to 5 unique errors only for better log readability - currently, in the worst case the field is concatenated from errors from all bulk documents.Addresses https://github.com/elastic/rally/issues/1834.