Check index failure n – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch encounters an issue while checking the index, possibly due to corruption, incorrect settings, or insufficient permissions. To resolve this, you can try reindexing your data, checking and adjusting your index settings, or ensuring that OpenSearch has the necessary permissions to access and modify the index. Additionally, check your OpenSearch logs for more detailed error messages that can help pinpoint the exact issue.

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This guide will help you check for common problems that cause the log ” check index [failure]\n{} ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: index, shard.

Log Context

Log “check index [failure]\n{}” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

                        corrupt = exc;
                if (corrupt != null) {
                    logger.warn("check index [failure]\n{}"; os.bytes().utf8ToString());
                    throw corrupt;
            } else {
                // full checkindex
                final CheckIndex.Status status = store.checkIndex(out);


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