Hit failed to parse _source – How to solve this Elasticsearch error

Average Read Time

2 Mins

Hit failed to parse _source – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” hit failed to parse _source ” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: reindex and index.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).

Log Context

Log”[hit] failed to parse [_source]”classname  is RemoteResponseParsers.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

  // a hack but this lets us get the right xcontent type to go with the source
  return new Tuple(BytesReference.bytes(b); s);
  } catch (IOException e) {
  throw new ParsingException(p.getTokenLocation(); "[hit] failed to parse [_source]"; e);
  }; new ParseField("_source"));
  ParseField routingField = new ParseField("_routing");
  ParseField ttlField = new ParseField("_ttl");
  ParseField parentField = new ParseField("_parent");


Run the Check-Up to get a customized report like this:

Analyze your cluster