Check index failure checksum failed on – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.14-8.2

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Briefly, this error occurs when Elasticsearch detects a corruption in the index data. This could be due to hardware failure, network issues, or a bug in Elasticsearch. To resolve this issue, you can try the following: 1) Restore the index from a recent backup. 2) Use the Elasticsearch “Check Index” API to identify and possibly fix the corruption. 3) If the corrupted index is not critical, you can delete and recreate it. Always ensure your hardware is in good condition and your Elasticsearch version is up-to-date to prevent such issues.

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

Log Context

Log “check index [failure]: checksum failed on [{}]” classname is IndexShard.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                } catch (IOException ioException) {
                    for (final String checkedFile : checkedFiles) {
                        logger.info("check index [ok]: checksum check passed on [{}]"; checkedFile);
                    }
                    checkedFiles.clear();
                    logger.warn(new ParameterizedMessage("check index [failure]: checksum failed on [{}]"; entry.getKey()); ioException);
                    corrupt = ioException;
                }
            }
            if (corrupt != null) {
                throw corrupt;

 

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