Unable to read named components – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.5-8.9

Briefly, this error occurs when Elasticsearch cannot read the named components due to issues like incorrect file permissions, corrupted files, or missing files. To resolve this, you can check and correct the file permissions, restore the corrupted files from a backup, or reinstall Elasticsearch if the files are missing. Additionally, ensure that the Elasticsearch process has the necessary read permissions for the directory where the named components are stored.

This guide will help you check for common problems that cause the log ” unable to read named components ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugins.

Log Context

Log “unable to read named components” classname is NamedComponentReader.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                return namedComponents;
            logger.debug(() -> Strings.format("No named component defined in plugin dir %s"; pluginDir));
        } catch (IOException e) {
            logger.error("unable to read named components"; e);
        return emptyMap();

    private Path findNamedComponentCacheFile(Path pluginDir) throws IOException {


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