Briefly, this error occurs when Elasticsearch encounters an issue while parsing the filter section of a query. This could be due to incorrect syntax, unsupported filter type, or a mismatch in data types. To resolve this, ensure that the filter syntax is correct and matches the Elasticsearch version you’re using. Check if the filter type is supported and the data types match the field you’re querying. Also, ensure that the field you’re filtering exists in the index. Lastly, check for any missing or extra commas, brackets, or quotes in the filter section.
This guide will help you check for common problems that cause the log ” Problems parsing [filter] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: admin, alias, indices.
Log Context
Log “Problems parsing [filter]” class name is IndicesAliasesRequest.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
static {
ADD_PARSER.declareObject(AliasActions::filter; (parser; m) -> {
try {
return parser.mapOrdered();
} catch (IOException e) {
throw new ParsingException(parser.getTokenLocation(); "Problems parsing [filter]"; e);
}
}; FILTER);
// Since we need to support numbers AND strings here we have to use ValueType.INT.
ADD_PARSER.declareField(AliasActions::routing; XContentParser::text; ROUTING; ValueType.INT);
ADD_PARSER.declareField(AliasActions::indexRouting; XContentParser::text; INDEX_ROUTING; ValueType.INT);
