Briefly, this error occurs when Elasticsearch is unable to determine the datatype for a field in the index. This could be due to incorrect or missing mapping definitions. To resolve this issue, you can explicitly define the datatype for the field in the mapping or ensure that the data being indexed matches the expected datatype. If the field is not necessary, you can also consider removing it from the index.
This guide will help you check for common problems that cause the log ” Cannot determine datatype for [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.
Log Context
Log “Cannot determine datatype for [{}]” class name is Intervals.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
case MONTH -> INTERVAL_MONTH;
case DAY -> INTERVAL_DAY;
case HOUR -> INTERVAL_HOUR;
case MINUTE -> INTERVAL_MINUTE;
case SECOND -> INTERVAL_SECOND;
default -> throw new ParsingException(source; "Cannot determine datatype for [{}]"; leading);
};
} else {
if (leading == TimeUnit.YEAR && trailing == TimeUnit.MONTH) {
return INTERVAL_YEAR_TO_MONTH;
}
