Intermittent EOF Errors

[0xrelapse]

Observed

Getting this error periodically via the golang clickhouse driver when connecting to the clickhouse cloud service.

read:
    github.com/ClickHouse/ch-go/proto.(*Reader).ReadFull
        /go/pkg/mod/github.com/!click!house/[email protected]/proto/reader.go:62
  - EOF

Here is our config (with connection details omitted):

        // nolint:exhaustruct
	conn, err := clickhouse.Open(&clickhouse.Options{
		TLS:     ...,
		Protocol: clickhouse.Native,
		Addr:     ....,
		Auth: clickhouse.Auth{
			Username: ...,
			Password: ...,
			Database: ...,
		},
		ClientInfo: clickhouse.ClientInfo{
			Products: []struct {
				Name    string
				Version string
			}{
				{Name: "....", Version: "0.1"},
			},
		},
		Compression: &clickhouse.Compression{
			Method: clickhouse.CompressionLZ4,
		},
		BlockBufferSize: 10,
		MaxOpenConns: 70,
		MaxIdleConns: 50,
	})

After this error occurs, other queries (both reads and write) also fail, all outputting the same EOF error

Because this is intermittent, it's a little hard to reproduce.

I wonder if there's a race condition in the connection lifetime cleanup routine?

Details

Environment

• clickhouse-go version: v2.30.0
• Interface: database/sql compatible driver
• Go version: 1.22.10
• Operating system: amazon-linux-2023
• ClickHouse version: 24.8
• Is it a ClickHouse Cloud? yes
• ClickHouse Server non-default settings, if any: everything is default

[jkaflik]

@SpencerTorres could you take a look?

[SpencerTorres]

@0xrelapse Could you add some details about how you're connecting and what type of queries you're running? How frequent, etc. Also let me know if you have any special settings in the TLS config. This issue will be hard to reproduce