Error parsing regular expression file – Elasticsearch Error How To Solve Related Issues



Error parsing regular expression file – 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 “error parsing regular expression file” 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: .


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”error parsing regular expression file”classname  is UserAgentParser.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

this.cache = cache;
 
  try {
  init(regexStream);
  } catch (IOException e) {
  throw new ElasticsearchParseException("error parsing regular expression file"; e);
  }
  }
 
  private void init(InputStream regexStream) throws IOException {
  // EMPTY is safe here because we don't use namedObject

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 Error parsing the json data using regex in fluentd -views 819 ,score 2

Fluentd tail source not moving logs to ElasticSearch -views   259



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