The dynamic synonym plugin adds a synonym token filter that reloads the synonym file (local file or remote file) at given intervals (default 60s).

1. mvn package

2. copy and unzip target/releases/elasticsearch-analysis-dynamic-synonym-{version}.zip to your-es-root/plugins/dynamic-synonym

{
    "index" : {
        "analysis" : {
            "analyzer" : {
                "synonym" : {
                    "tokenizer" : "whitespace",
                    "filter" : ["remote_synonym"]
                }
            },
            "filter" : {
                "remote_synonym" : {
                    "type" : "dynamic_synonym",
                    "synonyms_path" : "http://host:port/synonym.txt",
                    "interval": 30
                },
                "local_synonym" : {
                    "type" : "dynamic_synonym",
                    "synonyms_path" : "synonym.txt"
                },
                "synonym_graph" : {
                    "type" : "dynamic_synonym_graph",
                    "synonyms_path" : "http://host:port/synonym.txt"
                }
            }
        }
    }
}

type: dynamic_synonym or dynamic_synonym_graph, mandatory

synonyms_path: A file path relative to the Elastic config file or an URL, mandatory

interval: Refresh interval in seconds for the synonym file, default: 60, optional

ignore_case: Ignore case in synonyms file, default: false, optional

expand: Expand, default: true, optional

lenient: Lenient on exception thrown when importing a synonym, default: false, optional

format: Synonym file format, default: '', optional. For WordNet structure this can be set to 'wordnet'

• Local files: Determined by modification time of the file, if it has changed the synonyms wil
• Remote files: Reads out the Last-Modified and ETag http header. If one of these changes, the synonyms will be reloaded.

Note: File encoding should be an utf-8 text file.