# Lucene commit failed: checksum failed, while indexing
**URL:** https://discuss.elastic.co/t/lucene-commit-failed-checksum-failed-while-indexing/253215
**Category:** Elasticsearch
**Created:** [October 24, 2020, 5:48pm UTC](https://discuss.elastic.co/t/lucene-commit-failed-checksum-failed-while-indexing/253215 "2020-10-24T17:48:10Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@SuperToma](https://discuss.elastic.co/u/SuperToma)
#### Post date: [October 24, 2020, 5:48pm UTC](https://discuss.elastic.co/t/lucene-commit-failed-checksum-failed-while-indexing/253215/1 "2020-10-24T17:48:10Z")
Hello guys !
I'm faced with this error while indexing:
` [2020-10-24T18:18:31,520][WARN][o.e.i.e.Engine] [mini-server] [release][0] failed engine [lucene commit failed] org.apache.lucene.index.CorruptIndexException: checksum failed (hardware problem?) : expected=d464d53f actual=a462587c (resource=BufferedChecksumIndexInput(MMapIndexInput(path="/var/lib/elasticsearch/nodes/0/indices/ZyUEzVTkS1S7geQrMnwI7g/0/index/_18_Lucene84_0.doc")))`
`...`
`[2020-10-24T18:18:31,622][INFO][o.e.c.r.a.AllocationService] [mini-server] Cluster health status changed from [GREEN] to [RED] (reason: [shards failed [[release][0]]]).`
Then my index is flagged as RED and the cluster/node is not reachable anymore.
I thought it was an hardware problem as indicated then I changed my only local hard drive to a brand new one fast Kingston.
but I have exactly the same problem.
I have only 1 computer, then 1 cluster, 1 node.
16Gb of Ram
I pushed the heap size from 1Gb to 6Gb: same problem.
I tried to index from bulks of 1000 documents to 1 documents (1 by 1): same problem.
I run with:
- the latest Elasticsearch version: 7.9.3
- I'm very large on HDD free space.
- I pretty sure that did not happened on ES version 6.x
I don't know where to investigate anymore...
I will be thankful for any help.
Regards.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [November 21, 2020, 5:48pm UTC](https://discuss.elastic.co/t/lucene-commit-failed-checksum-failed-while-indexing/253215/2 "2020-11-21T17:48:21Z")
This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [January 16, 2021, 8:01pm UTC](https://discuss.elastic.co/t/lucene-commit-failed-checksum-failed-while-indexing/253215/3 "2021-01-16T20:01:06Z")
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### Author:  [@SuperToma](https://discuss.elastic.co/u/SuperToma)
#### Post date: [January 17, 2021, 8:44am UTC](https://discuss.elastic.co/t/lucene-commit-failed-checksum-failed-while-indexing/253215/4 "2021-01-17T08:44:07Z")
Sorry for the delay but I finally found the issue.
I have changed the RAM memory and don't have any errors anymore.
It was really an hardware problem as indicated in the error.
Regards.
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [January 17, 2021, 10:27pm UTC](https://discuss.elastic.co/t/lucene-commit-failed-checksum-failed-while-indexing/253215/5 "2021-01-17T22:27:20Z")