Failed to get size for info info name – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.3-8.9

Briefly, this error occurs when Elasticsearch is unable to retrieve the size of a specific information object due to issues like incorrect naming, lack of permissions, or the object not existing. To resolve this, you can verify the object’s name and its existence in the database. Also, check the permissions of the Elasticsearch user to ensure they have access to the object. Additionally, ensure that the Elasticsearch cluster is healthy and functioning properly.

This guide will help you check for common problems that cause the log ” failed to get size for [” + + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “failed to get size for [” + + “]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            numDocs += readerContext.reader().numDocs();
            numDeletedDocs += readerContext.reader().numDeletedDocs();
            try {
                sizeInBytes += info.sizeInBytes();
            } catch (IOException e) {
                logger.trace(() -> "failed to get size for [" + + "]"; e);
        return new DocsStats(numDocs; numDeletedDocs; sizeInBytes);


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