`remote` 및 `remoteSecure` 테이블 함수의 타임아웃 오류 해결

ClickHouse에서 remote 또는 remoteSecure 테이블 함수를 사용할 때 연결 타임아웃 설정을 조정해 타임아웃 오류를 해결하는 방법을 알아봅니다.

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코드: 279. DB::NetException: All connection tries failed.

문제 remote() or remoteSecure() 테이블 함수는 다른 ClickHouse 노드에 있는 원격 테이블에 접근할 수 있도록 합니다.

원격 노드와의 지연 시간이 100ms를 초과하는 노드에서 이러한 함수를 사용하면 타임아웃 오류가 발생하는 경우가 흔합니다.

예시:

4776d4bd8190 :) SELECT * FROM remoteSecure('HOSTNAME.us-east-2.aws.clickhouse.cloud', DATABASE, TABLE, 'USER', 'USER_PASSWORD')

SELECT *
FROM remoteSecure('HOSTNAME.us-east-2.aws.clickhouse.cloud', DATABASE, TABLE, 'USER', 'USER_PASSWORD')

Query id: 2bd6ddd0-66d9-4d19-830f-87e3cec3724b

0 rows in set. Elapsed: 1.213 sec.

Received exception from server (version 22.6.9):
Code: 519. DB::Exception: Received from localhost:9000. DB::NetException. DB::NetException: All attempts to get table structure failed. Log:

Code: 279. DB::NetException: All connection tries failed. Log:

Code: 209. DB::NetException: Timeout: connect timed out: 18.218.245.169:9440 (hc7d963h1t.us-east-2.aws.clickhouse.cloud:9440, connection timeout 100 ms). (SOCKET_TIMEOUT) (version 22.6.9.11 (official build))
Code: 209. DB::NetException: Timeout: connect timed out: 18.218.245.169:9440 (hc7d963h1t.us-east-2.aws.clickhouse.cloud:9440, connection timeout 100 ms). (SOCKET_TIMEOUT) (version 22.6.9.11 (official build))
Code: 209. DB::NetException: Timeout: connect timed out: 18.218.245.169:9440 (hc7d963h1t.us-east-2.aws.clickhouse.cloud:9440, connection timeout 100 ms). (SOCKET_TIMEOUT) (version 22.6.9.11 (official build))

. (ALL_CONNECTION_TRIES_FAILED) (version 22.6.9.11 (official build))

. (NO_REMOTE_SHARD_AVAILABLE)

해결 방법 연결 타임아웃을 늘리려면 connect_timeout_with_failover_secure_ms를 기본값인 100ms보다 큰 값(예: 1초)으로 설정하십시오.

4776d4bd8190 :) SELECT * FROM remoteSecure('HOSTNAME.us-east-2.aws.clickhouse.cloud:9440', DATABASE, TABLE, 'USER', 'USER_PASSWORD') SETTINGS connect_timeout_with_failover_secure_ms = 1000

SELECT *
FROM remoteSecure('HOSTNAME.us-east-2.aws.clickhouse.cloud:9440', DATABASE, TABLE, 'USER', 'USER_PASSWORD')
SETTINGS connect_timeout_with_failover_secure_ms = 1000

Query id: 8e2f4d41-307b-4e61-abb8-809190023247

┌─x─┐
│ 1 │
└───┘

1 row in set. Elapsed: 2.403 sec.