Failed to acquire searcher; source – How to solve related issues

Opster Team

Jan-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error 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: index and source.

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 :

         } catch (AlreadyClosedException ex) {
            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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