Elasticsearch bulk queue unbalanced, one node close to full

Elastic Stack Elasticsearch
1

Recently we found one issue: our es cluster had three nodes which storage our product env log, one node of cluster bulk queue size always close to full, other nodes not.

i adjust our send client config file, remove the node and watch it. during some times, i found the node bulk queue size still close to full size.

Who can help solve this problem？

curl -s localhost:9200/_cat/thread_pool/bulk?h=id,host,name,active,queue,queue_size,rejected
node1 xxx bulk 0 0 3000 0
node2 xxx bulk 0 0 3000 0
node3 xxx bulk 9 1525 3000 1287

2

How are you sending logs to Elasticsearch?

3

What is the output of the cat nodes API?

4

send client written by ourself, es driver is olivere/elastic.v5

5

sapadmin@ip-192-168-0-170 ~ $ curl localhost:9200/_cat/nodes
xxx 66 99 4 0.28 0.26 0.30 mdi * xxxx
xxx 59 93 9 0.34 0.52 0.60 mdi - xxxx
xxx 57 98 21 1.50 1.49 1.56 mdi - xxxx

all instance type is 8c,30m

6

Does that client do automatic load balancing?

7

Are you inserting documents or performing updates? How many shards are you actively indexing into? How are these distributed across the cluster?

8

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