659ebf6cfb
Today our systemd service defaults to a service type of simple. This means that systemd assumes Elasticsearch is ready as soon as the ExecStart (bin/elasticsearch) process is forked off. This means that the service appears ready long before it actually is, so before it is ready to receive requests. It also means that services that want to depend on Elasticsearch being ready to start can not as there is not a reliable mechanism to determine this. This commit changes the service type to notify. This requires that Elasticsearch sends a notification message via libsystemd sd_notify method. This commit does that by using JNA to invoke this native method. Additionally, we use this integration to also notify systemd when we are stopping. |
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