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https://issues.apache.org/jira/browse/FLINK-36781?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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k walton updated FLINK-36781:
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Description: When connecting to a remote gateway with the Flink SQL REPL we
have noticed that a blocking network request is made for every key press. This
makes the REPL terminal unusably unresponsive when typing text into it. (was:
When connecting to a remote gateway with the Flink SQL REPL we have noticed
that a network request is made for every key press. This makes the REPL
terminal unusably lagging when typing text into it.)
> Flink SQL REPL Remote Gateway lag
> ---------------------------------
>
> Key: FLINK-36781
> URL: https://issues.apache.org/jira/browse/FLINK-36781
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Client, Table SQL / Gateway
> Affects Versions: 1.20.0
> Environment: This was noticed when spawning a gateway on a remote
> kubernetes cluster and connecting through a port forward, which exacerbated
> the lag. But I've captured screenshots of the network requests on each key
> press on wireshark locally, which I've attached a recording of for clarity.
>
> You can reproduce this by doing the following:
> * Have docker installed
> * in one terminal run a host gateway
> {code:java}
> docker run -p 8083:8083 --rm -it --entrypoint /bin/bash flink:1.20 -c
> "/opt/flink/bin/start-cluster.sh && /opt/flink/bin/sql-gateway.sh
> start-foreground -D sql-gateway.endpoint.rest.port=8083 -D
> sql-gateway.endpoint.rest.address=localhost" {code}
> * in a second terminal run a sql client connected to it, on my machine the
> command is
> {code:java}
> /opt/homebrew/opt/apache-flink/libexec/bin/sql-client.sh gateway -e
> localhost:8083 {code}
> * Observe the network requests on each key press
>
> Reporter: k walton
> Priority: Major
> Attachments: flink-sql-gateway-lag.mov
>
>
> When connecting to a remote gateway with the Flink SQL REPL we have noticed
> that a blocking network request is made for every key press. This makes the
> REPL terminal unusably unresponsive when typing text into it.
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