Error when opening compound reader for Directory and – 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 ” Error when opening compound reader for Directory and ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: 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 “Error when opening compound reader for Directory [{}] and” classname is Engine.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

         if (useCompoundFile) {
            try {
                directory = engineConfig.getCodec().compoundFormat().getCompoundReader(segmentReader.directory();
                    segmentCommitInfo.info; IOContext.READ);
            } catch (IOException e) {
                logger.warn(() -> new ParameterizedMessage("Error when opening compound reader for Directory [{}] and " +
                    "SegmentCommitInfo [{}]"; segmentReader.directory(); segmentCommitInfo); e);

                return ImmutableOpenMap.of();
            }
        } else {




 

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