parseError with elasticsearh-js 13.0.1

We are using elasticsearch 2.4.0. We started facing memory issues with elasticsearch-js client version 12.1. We saw some known issues related to memory and we switched to elasticsearch -js issues 13.0.1

Node version used is 6.2.0

const elasticSearchClient = elasticSearch.Client({
    host: config.endpoints.elasticsearch, apiVersion: "2.4",
    maxRetries: 5, requestTimeout: 15000, deadTimeout: 30000, keepAlive: true
});

After switching we are getting this exception for search calls

Elasticsearch ERROR: 2017-05-17T12:19:21Z
  Error: Request error, retrying
  POST http://elasticsearch:9200/products/product/_search?q=id%3A2672789668 => Parse Error
      at Log.error (/home/app/node_modules/elasticsearch/src/lib/log.js:225:56)
      at checkRespForFailure (/home/app/node_modules/elasticsearch/src/lib/transport.js:246:18)
      at HttpConnector.<anonymous> (/home/app/node_modules/elasticsearch/src/lib/connectors/http.js:157:7)
      at ClientRequest.bound (/home/app/node_modules/elasticsearch/node_modules/lodash/dist/lodash.js:729:21)
      at emitOne (events.js:101:20)

Not sure what this exception exactly means. Is it because of incompatible versions ( is 2.4.0 not compatible with 13.0.1)?

Response much appreciated. Thanks

[spalger]

@Lakshmihm That Parse Error is coming from node.js, which means that node is unable to communicate with Elasticsearch for some reason.

Can you please verify that you can connect to elasticsearch from that machine using curl? Does this happen every time you use the search API? Are you using any other API methods?

[delvedor]

Hello @hashika2, the legacy client is no longer maintained, I strongly recommend migrating to the new one! Take a look here to understand what’s changed.