Are those the GC logs not the regular logs like above... We need a look at the regular elastic logs either though the journal like above or /var/log/elasticsearch/elasticsearch.log
There should be some messages near the end that indicate the issues... that above shows nothing...
Regular logs should look like something like this...
[2021-02-25T16:00:29,498][INFO ][o.e.p.PluginsService ] [ceres] loaded module [aggs-matrix-stats]
[2021-02-25T16:00:29,498][INFO ][o.e.p.PluginsService ] [ceres] loaded module [analysis-common]
[2021-02-25T16:00:29,498][INFO ][o.e.p.PluginsService ] [ceres] loaded module [constant-keyword]
[2021-02-25T16:00:29,498][INFO ][o.e.p.PluginsService ] [ceres] loaded module [flattened]
[2021-02-25T16:00:29,498][INFO ][o.e.p.PluginsService ] [ceres] loaded module [frozen-indices]
[2021-02-25T16:00:43,881][INFO ][o.e.c.r.a.AllocationService] [ceres] Cluster health status changed from [RED] to [YELLOW] (reason: [shards started [[metricbeat-7.10.2-2021.02.11-000001][0]]]).