Error when closing compound reader on Directory – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.12

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Briefly, this error occurs when Elasticsearch encounters an issue while trying to close a compound file system reader on a directory. This could be due to a corrupted index, insufficient permissions, or a disk space issue. To resolve this, you can try to restore the index from a backup, check and adjust the permissions of the directory, or free up some disk space. Additionally, ensure that the Elasticsearch process has the necessary permissions to read and write to the directory.

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This guide will help you check for common problems that cause the log ” Error when closing compound reader on Directory [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “Error when closing compound reader on Directory [{}]” classname is Engine.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        if (useCompoundFile) {
            try {
                directory.close();
            } catch (IOException e) {
                final Directory finalDirectory = directory;
                logger.warn(() -> new ParameterizedMessage("Error when closing compound reader on Directory [{}]";
                    finalDirectory); e);
            }
        }

        return map.build();

 

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