Elasticsearch version 5.6.10
Application - graylog
Suddenly a large amount of pending tasks is created, preventing processing data to indices.
All of type put-mapping , 300-400 tasks
insertOrder timeInQueue priority source
45061687 4.3s HIGH put-mapping
After several hours tasks disappear and application works properly.
Please any suggestions, how to "release" ES when such amount of pending tasks is created?
Thanks in advance