503 Service Unavailable

Elasticsearch version: 6.5.4

Server OS version: Windows Server 19

Describe the issue:
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`[2024-04-24T08:32:27,153][INFO ][o.e.g.GatewayService ] [CLUSTER-NODE1] recovered [98] indices into cluster_state

[2024-04-24T08:32:30,952][INFO ][c.f.s.c.IndexBaseConfigurationRepository] [CLUSTER-NODE1] Search Guard License Info: No license needed because enterprise modules are not enabled

[2024-04-24T08:32:30,952][INFO ][c.f.s.c.IndexBaseConfigurationRepository] [CLUSTER-NODE1] Node CLUSTER-NODE1 initialized`

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