# Corrupted Index
**URL:** https://discuss.elastic.co/t/corrupted-index/23319
**Category:** Elasticsearch
**Created:** [April 20, 2015, 11:03am UTC](https://discuss.elastic.co/t/corrupted-index/23319 "2015-04-20T11:03:15Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@RanjithVenkat](https://discuss.elastic.co/u/RanjithVenkat)
#### Post date: [April 20, 2015, 11:03am UTC](https://discuss.elastic.co/t/corrupted-index/23319/1 "2015-04-20T11:03:15Z")
Dear all,
We are using ES-1.3.7 for our search Application. Sometime back we upgraded
from 0.90.5 to 1.3.7. We have 2 master nodes and 3 data nodes. We are
getting CorruptedIndexException when Shard initialization is happening.
This is the second time we are facing such issue since last update. Last
time, only one shard got corrupted, but now almost 15 to 20 shards got
corrupted. Each shard has only ~500MB data.
log trace :
[2015-04-19 22:49:57,552][WARN][cluster.action.shard] [Node1]
> > [138][3] received shard failed for [138][3], node[EkvXNBUOTcuEfWo4SG72bA],
> > [P], s[INITIALIZING], indexUUID [_na_], reason [Failed to start shard,
> > message [IndexShardGatewayRecoveryException[[138][3] failed to fetch index
> > version after copying it over]; nested: CorruptIndexException[[138][3]
> > Corrupted index [corrupted\_gb9JvBzdRQKqkhEeaXFEIA] caused by:
> > CorruptIndexException[checksum failed (hardware problem?) : expected=637c1x
> > actual=gavi2b
> > resource=(org.apache.lucene.store.FSDirectory$FSIndexOutput@54916f2a)]]; ]]
>
> [2015-04-19 22:49:57,626][WARN][cluster.action.shard] [Node1]
>
> > [138][3] received shard failed for [138][3], node[Q1eAQgNtSJ2BLlMevzRzcA],
> > [P], s[INITIALIZING], indexUUID [_na_], reason [Failed to start shard,
> > message [IndexShardGatewayRecoveryException[[138][3] failed recovery];
> > nested: EngineCreationFailureException[[138][3] failed to open reader on
> > writer]; nested: FileNotFoundException[No such file [\_1gy\_x.del]]; ]]
Thanks in advance
Ranjith Venkatesan
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---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 12:18am UTC](https://discuss.elastic.co/t/corrupted-index/23319/2 "2017-07-06T00:18:46Z")