인프런 커뮤니티 질문&답변

안녕하세요.

강의 잘 보고 있습니다.

제가 회사에서 강의를 보고 있어서 그런데 강의 세팅과 조금 다르게 진행해서 연결에서 막힙니다.

일단 저는, 개인 PC로 IP - 192.168.100.170 인 서버 컴퓨터로 원격 연결을 하고
그 안에서 VB로 ubuntu VM을 생성했습니다.
VM의 고정 IP는 192.168.88.111로 설정했습니다.

이후 편한 환경을 위해 putty같은 프로그램으로 ssh 연결을 했습니다.
VM의 Port Forwarding으로

ssh는 192.168.100.170:27722 -> 192.168.88.111:22

192.168.100.170:29092 -> 192.168.88.111:9092 으로 진행했고 성공했습니다.

이후 개인 PC에서 Intelij로 SimpleProducer 실습을 진행하는데,

props.setProperty(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "192.168.100.170:29092");

로 나름 머리를 써서 작성했습니다.

물론, VM의 server.properties에서 외부 연결을 허용하도록 했습니다만, 정확한지 확신은 없습니다.

이후, 코드를 실행했더니, socket timeout 에러가 나오고 카프카 컨슈머에 들어오지 않았습니다.

Log를 자세히 보니 분명히 kafka topicId를 인지하는 걸 보니 연결은 된 것 같은데 뭐가 문제인지 모르겠습니다.

Starting Gradle Daemon...
Gradle Daemon started in 1 s 324 ms
> Task :producers:compileJava UP-TO-DATE
> Task :producers:processResources NO-SOURCE
> Task :producers:classes UP-TO-DATE

> Task :producers:SimpleProducer.main()
[main] INFO org.apache.kafka.clients.producer.ProducerConfig - ProducerConfig values: 
	acks = -1
	batch.size = 16384
	bootstrap.servers = [192.168.100.170:39092]
	buffer.memory = 33554432
	client.dns.lookup = use_all_dns_ips
	client.id = producer-1
	compression.type = none
	connections.max.idle.ms = 540000
	delivery.timeout.ms = 120000
	enable.idempotence = true
	interceptor.classes = []
	key.serializer = class org.apache.kafka.common.serialization.StringSerializer
	linger.ms = 0
	max.block.ms = 60000
	max.in.flight.requests.per.connection = 5
	max.request.size = 1048576
	metadata.max.age.ms = 300000
	metadata.max.idle.ms = 300000
	metric.reporters = []
	metrics.num.samples = 2
	metrics.recording.level = INFO
	metrics.sample.window.ms = 30000
	partitioner.class = class org.apache.kafka.clients.producer.internals.DefaultPartitioner
	receive.buffer.bytes = 32768
	reconnect.backoff.max.ms = 1000
	reconnect.backoff.ms = 50
	request.timeout.ms = 30000
	retries = 2147483647
	retry.backoff.ms = 100
	sasl.client.callback.handler.class = null
	sasl.jaas.config = null
	sasl.kerberos.kinit.cmd = /usr/bin/kinit
	sasl.kerberos.min.time.before.relogin = 60000
	sasl.kerberos.service.name = null
	sasl.kerberos.ticket.renew.jitter = 0.05
	sasl.kerberos.ticket.renew.window.factor = 0.8
	sasl.login.callback.handler.class = null
	sasl.login.class = null
	sasl.login.connect.timeout.ms = null
	sasl.login.read.timeout.ms = null
	sasl.login.refresh.buffer.seconds = 300
	sasl.login.refresh.min.period.seconds = 60
	sasl.login.refresh.window.factor = 0.8
	sasl.login.refresh.window.jitter = 0.05
	sasl.login.retry.backoff.max.ms = 10000
	sasl.login.retry.backoff.ms = 100
	sasl.mechanism = GSSAPI
	sasl.oauthbearer.clock.skew.seconds = 30
	sasl.oauthbearer.expected.audience = null
	sasl.oauthbearer.expected.issuer = null
	sasl.oauthbearer.jwks.endpoint.refresh.ms = 3600000
	sasl.oauthbearer.jwks.endpoint.retry.backoff.max.ms = 10000
	sasl.oauthbearer.jwks.endpoint.retry.backoff.ms = 100
	sasl.oauthbearer.jwks.endpoint.url = null
	sasl.oauthbearer.scope.claim.name = scope
	sasl.oauthbearer.sub.claim.name = sub
	sasl.oauthbearer.token.endpoint.url = null
	security.protocol = PLAINTEXT
	security.providers = null
	send.buffer.bytes = 131072
	socket.connection.setup.timeout.max.ms = 30000
	socket.connection.setup.timeout.ms = 10000
	ssl.cipher.suites = null
	ssl.enabled.protocols = [TLSv1.2, TLSv1.3]
	ssl.endpoint.identification.algorithm = https
	ssl.engine.factory.class = null
	ssl.key.password = null
	ssl.keymanager.algorithm = SunX509
	ssl.keystore.certificate.chain = null
	ssl.keystore.key = null
	ssl.keystore.location = null
	ssl.keystore.password = null
	ssl.keystore.type = JKS
	ssl.protocol = TLSv1.3
	ssl.provider = null
	ssl.secure.random.implementation = null
	ssl.trustmanager.algorithm = PKIX
	ssl.truststore.certificates = null
	ssl.truststore.location = null
	ssl.truststore.password = null
	ssl.truststore.type = JKS
	transaction.timeout.ms = 60000
	transactional.id = null
	value.serializer = class org.apache.kafka.common.serialization.StringSerializer

[main] INFO org.apache.kafka.common.utils.AppInfoParser - Kafka version: 3.1.0
[main] INFO org.apache.kafka.common.utils.AppInfoParser - Kafka commitId: 37edeed0777bacb3
[main] INFO org.apache.kafka.common.utils.AppInfoParser - Kafka startTimeMs: 1706742127571
[kafka-producer-network-thread | producer-1] INFO org.apache.kafka.clients.Metadata - [Producer clientId=producer-1] Resetting the last seen epoch of partition test-topic-0 to 0 since the associated topicId changed from null to jRkpHnfwT8mfWJ3PB9HHmg
[kafka-producer-network-thread | producer-1] INFO org.apache.kafka.clients.Metadata - [Producer clientId=producer-1] Cluster ID: ysNHdh2DQTKvR3X0yruxdg
[kafka-producer-network-thread | producer-1] INFO org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Disconnecting from node 0 due to socket connection setup timeout. The timeout value is 9728 ms.
[kafka-producer-network-thread | producer-1] INFO org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Disconnecting from node 0 due to socket connection setup timeout. The timeout value is 18153 ms.
[kafka-producer-network-thread | producer-1] INFO org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Node 0 disconnected.
[kafka-producer-network-thread | producer-1] WARN org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Connection to node 0 (/192.168.88.111:9092) could not be established. Broker may not be available.
[kafka-producer-network-thread | producer-1] INFO org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Node 0 disconnected.
[kafka-producer-network-thread | producer-1] WARN org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Connection to node 0 (/192.168.88.111:9092) could not be established. Broker may not be available.
[kafka-producer-network-thread | producer-1] INFO org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Node 0 disconnected.
[kafka-producer-network-thread | producer-1] WARN org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Connection to node 0 (/192.168.88.111:9092) could not be established. Broker may not be available.
[kafka-producer-network-thread | producer-1] INFO org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Node 0 disconnected.
[kafka-producer-network-thread | producer-1] WARN org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Connection to node 0 (/192.168.88.111:9092) could not be established. Broker may not be available.
[main] INFO org.apache.kafka.clients.producer.KafkaProducer - [Producer clientId=producer-1] Closing the Kafka producer with timeoutMillis = 9223372036854775807 ms.
[main] INFO org.apache.kafka.common.metrics.Metrics - Metrics scheduler closed
[main] INFO org.apache.kafka.common.metrics.Metrics - Closing reporter org.apache.kafka.common.metrics.JmxReporter
[main] INFO org.apache.kafka.common.metrics.Metrics - Metrics reporters closed
[main] INFO org.apache.kafka.common.utils.AppInfoParser - App info kafka.producer for producer-1 unregistered

Deprecated Gradle features were used in this build, making it incompatible with Gradle 9.0.

You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.

For more on this, please refer to https://docs.gradle.org/8.4/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation.

BUILD SUCCESSFUL in 2m 5s
2 actionable tasks: 1 executed, 1 up-to-date
오전 8:04:07: Execution finished ':producers:SimpleProducer.main()'.

[Producer clientId=producer-1] Resetting the last seen epoch of partition test-topic-0 to 0 since the associated topicId changed from null to jRkpHnfwT8mfWJ3PB9HHmg

이 부분을 보아하니 토픽은 인지하는 것 같은데 말이죠..

감사합니다.