# Failed to read latest segment infos on flush **URL:** \ **Category:** Elasticsearch\ **Created:** [October 17, 2015, 7:58pm UTC](https://discuss.elastic.co/t/failed-to-read-latest-segment-infos-on-flush/32438 "2015-10-17T19:58:58Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![genesis](https://avatars.discourse-cdn.com/v4/letter/g/96bed5/32.png) [@genesis](https://discuss.elastic.co/u/genesis)\ **Post date:** [October 17, 2015, 7:58pm UTC](https://discuss.elastic.co/t/failed-to-read-latest-segment-infos-on-flush/32438/1 "2015-10-17T19:58:58Z")
Any idea why I am getting: 2015-10-17 19:37:57,551][WARN][index.engine.internal] [ElasticSearch-18] [abc-2015.10.13][4] failed to read latest segment infos on flush java.nio.file.FileSystemException: /var/data/elasticsearch4/Media/nodes/0/indices/abc-2015.10.13/4/index/\_eqn.si: Too many open files at sun.nio.fs.UnixException.translateToIOException(UnixException.java:91) at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102) at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107) more /etc/sysconfig/elasticsearch # Directory where the Elasticsearch binary distribution resides ES\_HOME=/usr/share/elasticsearch # Maximum number of open files MAX\_OPEN\_FILES=65535 cat /etc/security/limits.conf # End of file - soft core unlimited - soft memlock unlimited - hard memlock unlimited ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [October 18, 2015, 9:01pm UTC](https://discuss.elastic.co/t/failed-to-read-latest-segment-infos-on-flush/32438/2 "2015-10-18T21:01:30Z")
> [@genesis](#): > > Too many open files I'd check that your ulimit changes have been applied, you can get that from the `_nodes` API endpoint. ---
**Author:** ![genesis](https://avatars.discourse-cdn.com/v4/letter/g/96bed5/32.png) [@genesis](https://discuss.elastic.co/u/genesis)\ **Post date:** [October 19, 2015, 2:55am UTC](https://discuss.elastic.co/t/failed-to-read-latest-segment-infos-on-flush/32438/3 "2015-10-19T02:55:22Z")
Can you please elaborate? It is a 12 nodes cluster, with 3 masters and 9 data nodes stats | grep open\_file\_descriptors "open\_file\_descriptors" : 48827, "open\_file\_descriptors" : 60585, "open\_file\_descriptors" : 65211, "open\_file\_descriptors" : 420, "open\_file\_descriptors" : 64604, "open\_file\_descriptors" : 63084, "open\_file\_descriptors" : 64135, "open\_file\_descriptors" : 453, "open\_file\_descriptors" : 62657, "open\_file\_descriptors" : 63350, "open\_file\_descriptors" : 417, "open\_file\_descriptors" : 64252, the 420, 453 & 417 are from the master servers. Please advice ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [October 19, 2015, 6:11am UTC](https://discuss.elastic.co/t/failed-to-read-latest-segment-infos-on-flush/32438/4 "2015-10-19T06:11:33Z")
You are so close to the 65k limit. You might have too many shards on your cluster . How many do you have? ---
**Author:** ![mikemccand](https://avatars.discourse-cdn.com/v4/letter/m/f04885/32.png) [@mikemccand](https://discuss.elastic.co/u/mikemccand)\ **Post date:** [October 19, 2015, 10:12am UTC](https://discuss.elastic.co/t/failed-to-read-latest-segment-infos-on-flush/32438/5 "2015-10-19T10:12:14Z")
Did you change any low-level index settings, e.g. for compound file format? ---
**Author:** ![genesis](https://avatars.discourse-cdn.com/v4/letter/g/96bed5/32.png) [@genesis](https://discuss.elastic.co/u/genesis)\ **Post date:** [October 19, 2015, 1:32pm UTC](https://discuss.elastic.co/t/failed-to-read-latest-segment-infos-on-flush/32438/6 "2015-10-19T13:32:52Z")
{ "cluster\_name" : "abcmedia", "status" : "green", "timed\_out" : false, "number\_of\_nodes" : 12, "number\_of\_data\_nodes" : 9, "active\_primary\_shards" : 4377, "active\_shards" : 8754, "relocating\_shards" : 2, "initializing\_shards" : 0, "unassigned\_shards" : 0 } ---
**Author:** ![genesis](https://avatars.discourse-cdn.com/v4/letter/g/96bed5/32.png) [@genesis](https://discuss.elastic.co/u/genesis)\ **Post date:** [October 19, 2015, 1:34pm UTC](https://discuss.elastic.co/t/failed-to-read-latest-segment-infos-on-flush/32438/7 "2015-10-19T13:34:07Z")
No, we have not made any configuration changes. ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [October 19, 2015, 10:17pm UTC](https://discuss.elastic.co/t/failed-to-read-latest-segment-infos-on-flush/32438/8 "2015-10-19T22:17:37Z")
That's a _massive_ number of shards for that many nodes, you need to reduce that. ---
**Author:** ![genesis](https://avatars.discourse-cdn.com/v4/letter/g/96bed5/32.png) [@genesis](https://discuss.elastic.co/u/genesis)\ **Post date:** [October 20, 2015, 3:44pm UTC](https://discuss.elastic.co/t/failed-to-read-latest-segment-infos-on-flush/32438/9 "2015-10-20T15:44:31Z")
Do you mean reduce the number of shards or increase the number of nodes? ---
**Author:** ![Ivan](https://avatars.discourse-cdn.com/v4/letter/i/df788c/32.png) [@Ivan](https://discuss.elastic.co/u/Ivan)\ **Post date:** [October 20, 2015, 5:46pm UTC](https://discuss.elastic.co/t/failed-to-read-latest-segment-infos-on-flush/32438/10 "2015-10-20T17:46:45Z")
Reduce the number of shards. Each shard is basically a separate Lucene index, so each one will consume file resources. Ivan ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 5, 2017, 11:43pm UTC](https://discuss.elastic.co/t/failed-to-read-latest-segment-infos-on-flush/32438/11 "2017-07-05T23:43:48Z")