Could not parse http response. expected a header value for header – Elasticsearch Error How To Solve Related Issues



Could not parse http response. expected a header value for header – Elasticsearch Error How To Solve Related Issues

Updated: July-20

Elasticsearch 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 causing many errors 

 

This guide will help you check for common problems that cause the log “could not parse http response. expected a header value for header” 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: response, plugin.


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 discover the cause of many errors and provides suitable actionable recommendations (free tool that requires no installation). 

Log Context

Log”could not parse http response. expected a header value for header”classname  is HttpResponse.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

headers.put(headerName; new String[] { String.valueOf(parser.objectText()) });
  } else if (token == XContentParser.Token.START_ARRAY) {
  List values = new ArrayList();
  while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
  if (!token.isValue()) {
  throw new ElasticsearchParseException("could not parse http response. expected a header value for header " +
  "[{}] but found [{}] instead"; headerName; token);
  } else {
  values.add(String.valueOf(parser.objectText()));
  }
  }

Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 "Could not get any response" response when using postman with subdomain -views 247,819 ,score 223

HTTP 400 (bad request) for logical error, not malformed request syntax -views   117,080,score 63



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