Failed to acquire searcher; 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 Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” failed to acquire searcher; source ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: source and index.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “failed to acquire searcher; source”classname  is Engine.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

throw ex;
 } catch (Exception ex) {
 maybeFailEngine("acquire_searcher"; ex);
 ensureOpen(ex); // throw EngineCloseException here if we are already closed
 logger.error(() -> new ParameterizedMessage("failed to acquire searcher; source {}"; source); ex);
 throw new EngineException(shardId; "failed to acquire searcher; source " + source; ex);
 } finally {
 Releasables.close(releasable);
 }
 }

 

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