Unknown parameter incremental_file_count – Elasticsearch Error How To Solve Related Issues

Unknown parameter incremental_file_count – 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 “unknown parameter incremental_file_count” 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: blobstore, 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 discover the cause of many errors and provides suitable actionable recommendations (free tool that requires no installation). 

Log Context

Log”unknown parameter [incremental_file_count]”classname  is BlobStoreIndexShardSnapshot.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

private static final String INDEX_VERSION = "index_version";
  private static final String START_TIME = "start_time";
  private static final String TIME = "time";
  private static final String FILES = "files";
  // for the sake of BWC keep the actual property names as in 6.x
  // + there is a constraint in #fromXContent() that leads to ElasticsearchParseException("unknown parameter [incremental_file_count]");
  private static final String INCREMENTAL_FILE_COUNT = "number_of_files";
  private static final String INCREMENTAL_SIZE = "total_size";
  private static final ParseField PARSE_NAME = new ParseField(NAME);


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 :





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