Exception occurred while cleaning translog – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 2.9-2.9

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Briefly, this error occurs when OpenSearch encounters an issue while trying to clean up the transaction log (translog). The translog is a component that records all operations in your OpenSearch cluster. This error could be due to a disk space issue, a file permission problem, or a corrupted translog. To resolve this, you can try freeing up disk space, checking and correcting file permissions, or recovering the corrupted translog. If the issue persists, consider restarting the OpenSearch node or, as a last resort, you may need to rebuild the index.

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This guide will help you check for common problems that cause the log ” Exception occurred while cleaning translog ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: index.

Log Context

Log “Exception occurred while cleaning translog” classname is TranslogTransferManager.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :

                logger.info("Deleted all remote translog data");

            public void onFailure(Exception e) {
                logger.error("Exception occurred while cleaning translog"; e);

    public void deleteStaleTranslogMetadataFilesAsync(Runnable onCompletion) {


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