# "missing checksum for name" error on S3 incremental snapshot

**URL:** <https://discuss.elastic.co/t/missing-checksum-for-name-error-on-s3-incremental-snapshot/169867>\
**Category:** Elasticsearch\
**Created:** [February 25, 2019, 3:47pm UTC](https://discuss.elastic.co/t/missing-checksum-for-name-error-on-s3-incremental-snapshot/169867 "2019-02-25T15:47:08Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ndtreviv](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ndtreviv/32/22494_2.png) [@ndtreviv](https://discuss.elastic.co/u/ndtreviv)\
**Post date:** [February 25, 2019, 3:47pm UTC](https://discuss.elastic.co/t/missing-checksum-for-name-error-on-s3-incremental-snapshot/169867/1 "2019-02-25T15:47:08Z")

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When trying to attempt an S3 incremental snapshot I get a number of failures, all with the same sort of error, being:

```auto
        "reason": "IndexShardSnapshotFailedException[ElasticsearchParseException[missing checksum for name [__26]]]; nested: ElasticsearchParseException[missing checksum for name [__26]]; ",

```

The `__26` part seems to be different for each index that failed.  
I'm running a full snapshot to see if that succeeds.

What does this error even mean, and how can I fix it?

Thank you for any help offered!

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**Author:** ![ndtreviv](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ndtreviv/32/22494_2.png) [@ndtreviv](https://discuss.elastic.co/u/ndtreviv)\
**Post date:** [February 26, 2019, 1:22pm UTC](https://discuss.elastic.co/t/missing-checksum-for-name-error-on-s3-incremental-snapshot/169867/2 "2019-02-26T13:22:15Z")

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In the end, re-creating/re-indexing the problem indices solved the issue, whatever that issue actually was. There was one metrics index that re-created itself before I could, and that index continued to have problems with snapshots, so there may be something related there.

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**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\
**Post date:** [February 26, 2019, 2:13pm UTC](https://discuss.elastic.co/t/missing-checksum-for-name-error-on-s3-incremental-snapshot/169867/3 "2019-02-26T14:13:57Z")

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> [@ndtreviv](#):
>
> What does this error even mean, and how can I fix it?

I think the error means that the metadata associated with these snapshots is either corrupt or very old. Or both.

It might be wise to create another repository and take a full snapshot there, and then treat this repository as suspect.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 26, 2019, 2:14pm UTC](https://discuss.elastic.co/t/missing-checksum-for-name-error-on-s3-incremental-snapshot/169867/4 "2019-03-26T14:14:06Z")

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