OutOfMemoryError of web browser happen by search specific word in Kibana

[BlackCat]

■Elasticsearch server spec
CPU:8
Memory:64GB
Disk:1TB
Total Java Heap Size:32GB in yml.

  es01 - "ES_JAVA_OPTS=-Xms12g -Xmx12g"
  es02 - "ES_JAVA_OPTS=-Xms10g -Xmx10g"
  es03 - "ES_JAVA_OPTS=-Xms10g -Xmx10g"

number of shards:40
number of index:1

Log of Elasticsearch haven't OutOfMemoryError.
What is cause?

[warkolm (Mark Walkom)]

What do your Kibana logs show?
What does the browser dev console show?

[BlackCat]

I opened DevTools, But DevTools was disconnected.

I pasted log of Kibana below.

{"type":"response","@timestamp":"2021-05-25T05:06:28+00:00","tags":[],"pid":7,"method":"get","statusCode":200,"req":{"url":"/ui/fonts/inter_ui/Inter-UI-Light-BETA.woff2","method":"get","headers":{"host":"<Server IP>","connection":"keep-alive","origin":"http://<Server IP>","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","accept":"*/*","referer":"http://<Server IP>/app/discover","accept-encoding":"gzip, deflate","accept-language":"en-US,en;q=0.9,ja;q=0.8,en-GB;q=0.7"},"remoteAddress":"<Client IP>","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","referer":"http://<Server IP>/app/discover"},"res":{"statusCode":200,"responseTime":4,"contentLength":96700},"message":"GET /ui/fonts/inter_ui/Inter-UI-Light-BETA.woff2 200 4ms - 94.4KB"}
{"type":"response","@timestamp":"2021-05-25T05:06:29+00:00","tags":[],"pid":7,"method":"get","statusCode":200,"req":{"url":"/api/saved_objects/_find?fields=title&per_page=10000&type=index-pattern","method":"get","headers":{"host":"<Server IP>","connection":"keep-alive","kbn-version":"7.12.0","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","content-type":"application/json","accept":"*/*","referer":"http://<Server IP>/app/discover","accept-encoding":"gzip, deflate","accept-language":"en-US,en;q=0.9,ja;q=0.8,en-GB;q=0.7"},"remoteAddress":"<Client IP>","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","referer":"http://<Server IP>/app/discover"},"res":{"statusCode":200,"responseTime":9,"contentLength":363},"message":"GET /api/saved_objects/_find?fields=title&per_page=10000&type=index-pattern 200 9ms - 363.0B"}
{"type":"response","@timestamp":"2021-05-25T05:06:29+00:00","tags":[],"pid":7,"method":"post","statusCode":200,"req":{"url":"/internal/global_search/find","method":"post","headers":{"host":"<Server IP>","connection":"keep-alive","content-length":"77","kbn-version":"7.12.0","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","content-type":"application/json","accept":"*/*","origin":"http://<Server IP>","referer":"http://<Server IP>/app/discover","accept-encoding":"gzip, deflate","accept-language":"en-US,en;q=0.9,ja;q=0.8,en-GB;q=0.7"},"remoteAddress":"<Client IP>","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","referer":"http://<Server IP>/app/discover"},"res":{"statusCode":200,"responseTime":11,"contentLength":14},"message":"POST /internal/global_search/find 200 11ms - 14.0B"}
{"type":"response","@timestamp":"2021-05-25T05:06:29+00:00","tags":[],"pid":7,"method":"post","statusCode":200,"req":{"url":"/api/saved_objects/_bulk_get","method":"post","headers":{"host":"<Server IP>","connection":"keep-alive","content-length":"132","kbn-version":"7.12.0","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","content-type":"application/json","accept":"*/*","origin":"http://<Server IP>","referer":"http://<Server IP>/app/discover","accept-encoding":"gzip, deflate","accept-language":"en-US,en;q=0.9,ja;q=0.8,en-GB;q=0.7"},"remoteAddress":"<Client IP>","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","referer":"http://<Server IP>/app/discover"},"res":{"statusCode":200,"responseTime":7,"contentLength":1254},"message":"POST /api/saved_objects/_bulk_get 200 7ms - 1.2KB"}
{"type":"response","@timestamp":"2021-05-25T05:06:29+00:00","tags":[],"pid":7,"method":"get","statusCode":200,"req":{"url":"/api/index_patterns/_fields_for_wildcard?pattern=server_log_2021&meta_fields=_source&meta_fields=_id&meta_fields=_type&meta_fields=_index&meta_fields=_score","method":"get","headers":{"host":"<Server IP>","connection":"keep-alive","kbn-version":"7.12.0","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","content-type":"application/json","accept":"*/*","referer":"http://<Server IP>/app/discover","accept-encoding":"gzip, deflate","accept-language":"en-US,en;q=0.9,ja;q=0.8,en-GB;q=0.7"},"remoteAddress":"<Client IP>","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","referer":"http://<Server IP>/app/discover"},"res":{"statusCode":200,"responseTime":22,"contentLength":9367},"message":"GET /api/index_patterns/_fields_for_wildcard?pattern=server_log_2021&meta_fields=_source&meta_fields=_id&meta_fields=_type&meta_fields=_index&meta_fields=_score 200 22ms - 9.1KB"}
{"type":"response","@timestamp":"2021-05-25T05:06:29+00:00","tags":[],"pid":7,"method":"get","statusCode":200,"req":{"url":"/ui/fonts/inter_ui/Inter-UI-Bold.woff2","method":"get","headers":{"host":"<Server IP>","connection":"keep-alive","origin":"http://<Server IP>","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","accept":"*/*","referer":"http://<Server IP>/app/discover","accept-encoding":"gzip, deflate","accept-language":"en-US,en;q=0.9,ja;q=0.8,en-GB;q=0.7"},"remoteAddress":"<Client IP>","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","referer":"http://<Server IP>/app/discover"},"res":{"statusCode":200,"responseTime":3,"contentLength":94840},"message":"GET /ui/fonts/inter_ui/Inter-UI-Bold.woff2 200 3ms - 92.6KB"}
{"type":"response","@timestamp":"2021-05-25T05:06:29+00:00","tags":[],"pid":7,"method":"post","statusCode":200,"req":{"url":"/internal/bsearch","method":"post","headers":{"host":"<Server IP>","connection":"keep-alive","content-length":"709","kbn-version":"7.12.0","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","content-type":"application/json","accept":"*/*","origin":"http://<Server IP>","referer":"http://<Server IP>/app/discover","accept-encoding":"gzip, deflate","accept-language":"en-US,en;q=0.9,ja;q=0.8,en-GB;q=0.7"},"remoteAddress":"<Client IP>","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","referer":"http://<Server IP>/app/discover"},"res":{"statusCode":200,"responseTime":122},"message":"POST /internal/bsearch 200 122ms"}
{"type":"response","@timestamp":"2021-05-25T05:06:31+00:00","tags":[],"pid":7,"method":"post","statusCode":200,"req":{"url":"/internal/bsearch","method":"post","headers":{"host":"<Server IP>","connection":"keep-alive","content-length":"789","kbn-version":"7.12.0","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","content-type":"application/json","accept":"*/*","origin":"http://<Server IP>","referer":"http://<Server IP>/app/discover","accept-encoding":"gzip, deflate","accept-language":"en-US,en;q=0.9,ja;q=0.8,en-GB;q=0.7"},"remoteAddress":"<Client IP>","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","referer":"http://<Server IP>/app/discover"},"res":{"statusCode":200,"responseTime":207},"message":"POST /internal/bsearch 200 207ms"}
{"type":"response","@timestamp":"2021-05-25T05:06:33+00:00","tags":[],"pid":7,"method":"get","statusCode":200,"req":{"url":"/39309/bundles/plugin/kibanaLegacy/af7ae505a9eed503f8b8e6982036873e.woff2","method":"get","headers":{"host":"<Server IP>","connection":"keep-alive","origin":"http://<Server IP>","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","accept":"*/*","referer":"http://<Server IP>/app/discover","accept-encoding":"gzip, deflate","accept-language":"en-US,en;q=0.9,ja;q=0.8,en-GB;q=0.7"},"remoteAddress":"<Client IP>","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","referer":"http://<Server IP>/app/discover"},"res":{"statusCode":200,"responseTime":4,"contentLength":77160},"message":"GET /39309/bundles/plugin/kibanaLegacy/af7ae505a9eed503f8b8e6982036873e.woff2 200 4ms - 75.4KB"}
{"type":"response","@timestamp":"2021-05-25T05:06:33+00:00","tags":[],"pid":7,"method":"get","statusCode":200,"req":{"url":"/ui/fonts/roboto_mono/RobotoMono-Regular.ttf","method":"get","headers":{"host":"<Server IP>","connection":"keep-alive","origin":"http://<Server IP>","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","accept":"*/*","referer":"http://<Server IP>/app/discover","accept-encoding":"gzip, deflate","accept-language":"en-US,en;q=0.9,ja;q=0.8,en-GB;q=0.7"},"remoteAddress":"<Client IP>","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","referer":"http://<Server IP>/app/discover"},"res":{"statusCode":200,"responseTime":11,"contentLength":224},"message":"GET /ui/fonts/roboto_mono/RobotoMono-Regular.ttf 200 11ms - 224.0B"}
{"type":"response","@timestamp":"2021-05-25T05:06:38+00:00","tags":[],"pid":7,"method":"post","statusCode":200,"req":{"url":"/internal/bsearch","method":"post","headers":{"host":"<Server IP>","connection":"keep-alive","content-length":"763","kbn-version":"7.12.0","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","content-type":"application/json","accept":"*/*","origin":"http://<Server IP>","referer":"http://<Server IP>/app/discover","accept-encoding":"gzip, deflate","accept-language":"en-US,en;q=0.9,ja;q=0.8,en-GB;q=0.7"},"remoteAddress":"<Client IP>","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","referer":"http://<Server IP>/app/discover"},"res":{"statusCode":200,"responseTime":117},"message":"POST /internal/bsearch 200 117ms"}
{"type":"response","@timestamp":"2021-05-25T05:06:39+00:00","tags":[],"pid":7,"method":"post","statusCode":200,"req":{"url":"/internal/bsearch","method":"post","headers":{"host":"<Server IP>","connection":"keep-alive","content-length":"843","kbn-version":"7.12.0","user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","content-type":"application/json","accept":"*/*","origin":"http://<Server IP>","referer":"http://<Server IP>/app/discover","accept-encoding":"gzip, deflate","accept-language":"en-US,en;q=0.9,ja;q=0.8,en-GB;q=0.7"},"remoteAddress":"<Client IP>","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36","referer":"http://<Server IP>/app/discover"},"res":{"statusCode":200,"responseTime":1367},"message":"POST /internal/bsearch 200 1367ms"}