Exception during dfs phase – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when there’s an issue during the Distributed File System (DFS) phase of an Elasticsearch query. This phase is responsible for collecting statistics about the terms in the query. The error could be due to a network issue, a node failure, or a problem with the data. To resolve this, you can try rerunning the query, checking the health of your nodes, or examining your data for inconsistencies. If the problem persists, consider reindexing your data or adjusting your query to be less complex.

This guide will help you check for common problems that cause the log ” Exception during dfs phase ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search.

Log Context

Log “Exception during dfs phase” class name is DfsPhase.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (context.getProfilers() != null) {
 } catch (Exception e) {
 throw new DfsPhaseExecutionException(context.shardTarget(); "Exception during dfs phase"; e);
 }  private void collectStatistics(SearchContext context) throws IOException {
 final DfsProfiler profiler = context.getProfilers() == null ? null : context.getProfilers().getDfsProfiler();