Courier Fetch: shards failed

Question

Why do I get these warnings after adding more data to my elasticsearch? And the warnings are different every time I browse the dashboard.

\"Courier Fetch: 30 of 60 s

Answer 1

I agree with @Philip's opinion, But it's necessary to restart elasticsearch at least on Elasticsearch >=1.5.2, because you can dynamically set threadpool.search.queue_size.

curl -XPUT http://your_es:9200/_cluster/settings
{
    "transient":{
        "threadpool.search.queue_size":10000
    }
}