Couldn t list Directory from SegmentReader and SegmentInfo – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 5-5

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Briefly, this error occurs when Elasticsearch is unable to access or read the directory containing the index segments due to issues like insufficient permissions, disk space issues, or corruption of the index. To resolve this, you can try the following: 1) Check and adjust the file permissions to ensure Elasticsearch has access. 2) Verify there’s enough disk space and free up space if necessary. 3) Use the Elasticsearch Check Index API to check the health of the index and the Elasticsearch Repair API to fix any detected issues.

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This guide will help you check for common problems that cause the log ” Couldn’t list Directory from SegmentReader [{}] and SegmentInfo [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “Couldn’t list Directory from SegmentReader [{}] and SegmentInfo [{}]” classname is Engine.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

             }
        } else {
            try {
                files = segmentReader.getSegmentInfo().files().toArray(new String[]{});
            } catch (IOException e) {
                logger.warn((Supplier>) () -> new ParameterizedMessage("Couldn't list Directory from SegmentReader [{}] and SegmentInfo [{}]"; segmentReader; segmentReader.getSegmentInfo()); e);
                return ImmutableOpenMap.of();
            }
        }

        ImmutableOpenMap.Builder map = ImmutableOpenMap.builder();




 

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