gRPC KeepAlive
keep-alive settings
Here are some good settings for an initial configuration of a SpringBoot FactCast client/server setup in case you ran into gRPC related client server communication troubles.
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Sending keep-alive HTTP/2 PINGs on the connection is useful in case you are running on infrastructure that doesn’t support configurable idle timeouts, and threfore closes connections.
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The proposed values are defining a scenario where the client sends keep-alive HTTP/2 PINGs every 300s and the server accepts this behavior without sending
GO_AWAY ENHANCE_YOUR_CALMto the client. Please adobt to your specific needs.
Client side
| Property | Description | Proposed value |
|---|---|---|
grpc.client.factstore.enable-keep-alive |
Configures whether keepAlive shoud be enabled. Defaults to false. | true |
grpc.client.factstore.keep-alive-time |
The default delay before sending keepAlives. Defaults to 60s. Please note that shorter intervals increase the network burden for the server. | 300 |
grpc.client.factstore.keep-alive-without-calls |
Configures whether keepAlive will be performed when there are no outstanding RPCs on a connection. Defaults to false. | true |
Further details can be found here : net.devh.boot.grpc.client.config.GrpcChannelProperties.
Server side
| Property | Description | Proposed value |
|---|---|---|
grpc.server.permit-keep-alive-without-calls |
Configures whether clients are allowed to send keep-alive HTTP/2 PINGs even if there are no outstanding RPCs on the connection. Defaults to false. | true |
grpc.server.permit-keep-alive-time |
Specifies the most aggressive keep-alive time in seconds clients are permitted to configure. Defaults to 5min. | 100 |
Further details can be found here : net.devh.boot.grpc.server.config.GrpcServerProperties.