• when:
  • I have a lot of requests against Optimize that need to perform scrolling (e.g. a lot of users loading reports/dashboards)
• then:
  • Optimize throws a warning after a while:

    10:08:03.200 [I/O dispatcher 2] WARN org.elasticsearch.client.RestClient - request [POST http://localhost:9200/optimize-process-definition/process-definition/_search?typed_keys=true&ignore_unavailable=false&expand_wildcards=open&allow_no_indices=true&scroll=60000ms&search_type=query_then_fetch&batched_reduce_size=512] returned 1 warnings: [299 Elasticsearch-6.6.2-3bd3e59 "Trying to create more than 500 scroll contexts will not be allowed in the next major version by default. You can change the [search.max_open_scroll_context] setting to use a greater default value or lower the number of scrolls that you need to run in parallel." "Mon, 22 Jul 2019 07:08:03 GMT"]
    

• expected:
  • Optimize can handle a large load of requests without any problems

Hint:
We should think about to descreasing the scroll timeout value of Elasticsearch or cleaning up the scrolling ourself by closing the scroll after the scrolling is done.