Hyukjin Kwon created SPARK-61234:
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Summary: Apply the gRPC keepalive of the connection string to the
channel, as PySpark does, and redact the token in the Debug of ChannelBuilder
Key: SPARK-61234
URL: https://issues.apache.org/jira/browse/SPARK-61234
Project: Spark
Issue Type: Bug
Components: Connect
Affects Versions: connect-rust-4.3.0
Reporter: Hyukjin Kwon
The Rust client parses grpc_keepalive_enabled, grpc_keepalive_time_ms,
grpc_keepalive_timeout_ms and grpc_keepalive_without_calls
(ChannelBuilder::keepalive_*) but never applies them: its tonic channel has
only a connect timeout. PySpark 4.3.0 (SPARK-58094) applies them by default (a
PING after 60 s, 20 s for its acknowledgement, also without calls in flight),
so a connection that a NAT gateway or load balancer drops silently fails with
UNAVAILABLE and is retried or reattached; the Rust client waits on it forever.
Also, the derived Debug of the public ChannelBuilder prints the token of the
connection string (params: {"token": "..."}).
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