Open index input blobFetchRequest getFilePath got error – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 2.6-2.6

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Briefly, this error occurs when OpenSearch is unable to open an index input file, possibly due to a file path issue or a permission problem. To resolve this, you can verify the file path specified in blobFetchRequest.getFilePath() is correct and accessible. Also, check the permissions of the file to ensure OpenSearch has the necessary read access. If the file is in use by another process, ensure it is released before OpenSearch tries to access it. Lastly, if the file is corrupted, you may need to restore it from a backup.

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This guide will help you check for common problems that cause the log ” Open index input ” + blobFetchRequest.getFilePath() + ” got error ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: request, index.

Log Context

Log “Open index input ” + blobFetchRequest.getFilePath() + ” got error ” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

                // if it's already in the file cache; but closed; open it and replace the original one
                try {
                    IndexInput luceneIndexInput = blobFetchRequest.getDirectory().openInput(blobFetchRequest.getFileName(); IOContext.READ);
                    return new FileCachedIndexInput(fileCache; blobFetchRequest.getFilePath(); luceneIndexInput);
                } catch (IOException ioe) {
                    logger.warn("Open index input " + blobFetchRequest.getFilePath() + " got error "; ioe);
                    // open failed so return null to download the file again
                    return null;



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