Number of Shards open Issue - 7.0.1

Elastic Stack Elasticsearch
1

I am attempting to upgrade from 6.* to 7.0.1 and noticed there is a hard limit set for shards.

My question is, is there any advice for limiting Shards open or re-configuring this limit?

Per the documentation, the limit seems to be unbound, not sure if that is the case at this point.
https://www.elastic.co/guide/en/elasticsearch/reference/current/allocation-total-shards.html

The Error below shows a hard limit of 1000 shards set for 7.0.1

unexpected error while indexing monitoring document
org.elasticsearch.xpack.monitoring.exporter.ExportException: [.monitoring-es-7-2019.05.09] IndexCreationException[failed to create index [.monitoring-es-7-2019.05.09]]; nested: ValidationException[Validation Failed: 1: this action would add [2] total shards, but this cluster currently has [5044]/[1000] maximum shards open;];

Thank you

2

The limit you are hitting is cluster.max_shards_per_node. I think it's right, you probably should try and reduce the number of shards in this cluster. Here is an article with more info:

1 Like
3

Thank you @DavidTurner for the replay,
Would you have any recommendations on how to start up the 7.0.1 node so I can manage the cluster? This is not a production environment and I was attempting to move up to 7.0 for testing. My problem is I can't get Kibana up and running to get in an manage the API due to Kibana needing to create new index templates. I understand I could go the route of sending Curl commands but I'd rather manage it from the UI.
Thank you - Cody

4

Yes, as a temporary measure, until you get the number of shards under control, you can add cluster.max_shards_per_node: 5100 to your elasticsearch.yml config file.

1 Like
5

@DavidTurner
Interesting, I had tried that already and was still getting the same alarm
I can't seem to figure out how to set that cluster.max_shards_per_node: 5100

I have tried cluster.max_shards_per_node: 5100 in elasticsearch.yml
and
$ES_HOME\bin\elasticsearch -Ecluster.max_shards_per_node=5100 with no luck （；＿；）

6

Ok, confusingly this setting is only a dynamic setting right now, so the values from elasticsearch.yml and the command line are both ignored. I think this is a bug and opened #42137.

In the meantime you can set it dynamically on a running Elasticsearch cluster with the following curl command

curl -XPUT $CLUSTER_URL/_cluster/settings -H 'Content-type: application/json' --data-binary $'{"transient":{"cluster.max_shards_per_node":5100}}'
4 Likes
7

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.