NEST客户端 实现近义词匹配,用自定义分析器,映射到字段提示分析器不存在

NEST版本:2.4.1
ES版本:2.4.1
 
1 C# 自定义分析器和映射字段的代码如下:

var descriptor = new CreateIndexDescriptor(DefaultIndex)

                    .Settings(s => s

                        .Analysis(a => a

                            .TokenFilters(tf => tf

                                .Synonym("my_synonym_filter", stf => stf

                                    .SynonymsPath("analysis/synonym.txt")

                                    .Tokenizer("whitespace")

                                )

                            )

                            .Analyzers(an => an.Custom("myik_syno", ca => ca

                                .Tokenizer("ik")

                                .Filters("my_synonym_filter")

                                )

                            )

                            .Analyzers(an => an.Custom("myik_smart_syno", ca => ca

                                .Tokenizer("ik_smart")

                                .Filters("my_synonym_filter")

                                )

                            )

                        )

                    )

                 .Mappings(m => m.Map<MpMappingInfo>(tm => tm.AutoMap()

                       .Properties(ps => ps

                            .Number(p => p.Name(n => n.Id))

                            .Number(p => p.Name(n => n.MPType))

                            .Boolean(p => p.Name(n => n.NeedPay))

                            .Number(p => p.Name(n => n.UserId))

                            .String(p => p.Name(n => n.TrueName).Analyzer("ik"))

                            .String(p => p.Name(n => n.ImageUrl).NotAnalyzed())

                            .String(p => p.Name(n => n.Organization).Analyzer("ik"))

                            .String(p => p.Name(n => n.Introduction).Analyzer("myik_syno"))

                            .Number(p => p.Name(n => n.ChannelId))

                            .String(p => p.Name(n => n.DeptName).Analyzer("ik"))

                            .String(p => p.Name(n => n.PositionalTitle).NotAnalyzed())

                            .String(p => p.Name(n => n.Description).Analyzer("myik_syno"))

                            .String(p => p.Name(n => n.ChannelIdList).NotAnalyzed())

                            .String(p => p.Name(n => n.ChannelNameList).Analyzer("myik_syno"))

                            .Date(p => p.Name(n => n.CreateTime))

                            .GeoPoint(p => p.Name(n => n.Location).LatLon(true))

                        )

                    )

                 );

            var indexResponse = config.Client.CreateIndex(descriptor);

2 在ES的config目录下创建了analysis\synonym.txt文件.
在执行生成索引的时候,提示错误日志:
MapperParsingException[Failed to parse mapping [mp]: analyzer [myik_syno] not found for field [description]]; nested: MapperParsingException[analyzer [myik_syno] not found for field [description]];