我尝试连接到经纪人需要SSL的kafka群集，以供客户端连接。大多数客户都可以通过SSL与经纪人沟通，所以我知道经纪人设置正确。我们打算使用双向SSL身份验证，并按照以下说明操作：https://docs.confluent.io/current/tutorials/security_tutorial.html#security-tutorial。
但是我有一个java应用程序，我想连接到代理。我认为SSL握手不完整，因此对代理的请求超时。相同的Java应用程序可以连接到不支持SSL的Kafka代理，而不会出现问题。
更新
当我尝试启用ssl时遇到此问题。在调试时，身份验证异常变为空。我还可以看到我的信任库和密钥库已正确加载。那么如何进一步解决此元数据更新请求超时问题呢？
org.apache.kafka.common.errors.TimeoutException: Failed to update metadata after 60000 ms.
来自
private ClusterAndWaitTime waitOnMetadata(String topic, Integer partition, long maxWaitMs) throws InterruptedException {
当我使用bitnami docker image运行kafka控制台生成器时，将相同的trustStore / keyStore作为env变量传递，它可以正常工作。
这有效：
docker run -it -v /Users/kafka/kafka_2.11-1.0.0/bin/kafka.client.keystore.jks:/tmp/keystore.jks -v /Users/kafka/kafka_2.11-1.0.0/bin/kafka.client.truststore.jks:/tmp/truststore.jks -v /Users/kafka/kafka_2.11-1.0.0/bin/client_ssl.properties:/tmp/client.properties bitnami/kafka:1.0.0-r3 kafka-console-producer.sh --broker-list some-elb.elb.us-west-2.amazonaws.com:9094 --topic test --producer.config /tmp/client.properties
以下是我的java客户端应用程序的调试日志。欣赏有关如何解决此问题的任何见解。
2018-03-13 20:13:38.661 INFO 20653 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2018-03-13 20:13:38.669 INFO 20653 --- [ main] c.i.aggregate.precompute.Application : Started Application in 14.066 seconds (JVM running for 15.12)
2018-03-13 20:13:42.225 INFO 20653 --- [ main] o.a.k.clients.producer.ProducerConfig : ProducerConfig values:
acks = all
batch.size = 16384
bootstrap.servers = [some-elb.elb.us-west-2.amazonaws.com:9094]
buffer.memory = 33554432
client.id =
compression.type = lz4
connections.max.idle.ms = 540000
enable.idempotence = false
interceptor.classes = null
key.serializer = class org.apache.kafka.common.serialization.StringSerializer
linger.ms = 0
max.block.ms = 2000
max.in.flight.requests.per.connection = 5
max.request.size = 1048576
metadata.max.age.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.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.mechanism = GSSAPI
security.protocol = SSL
send.buffer.bytes = 131072
ssl.cipher.suites = null
ssl.enabled.protocols = [TLSv1.2, TLSv1.1, TLSv1]
ssl.endpoint.identification.algorithm = null
ssl.key.password = [hidden]
ssl.keymanager.algorithm = SunX509
ssl.keystore.location = /Users/kafka/Cluster-Certs/kafka.client.keystore.jks
ssl.keystore.password = [hidden]
ssl.keystore.type = JKS
ssl.protocol = TLS
ssl.provider = null
ssl.secure.random.implementation = null
ssl.trustmanager.algorithm = PKIX
ssl.truststore.location = /Users/kafka/Cluster-Certs/kafka.client.truststore.jks
ssl.truststore.password = [hidden]
ssl.truststore.type = JKS
transaction.timeout.ms = 60000
transactional.id = null
value.serializer = <some class>
2018-03-13 20:13:42.287 TRACE 20653 --- [ main] o.a.k.clients.producer.KafkaProducer : [Producer clientId=producer-1] Starting the Kafka producer
2018-03-13 20:13:42.841 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name bufferpool-wait-time
2018-03-13 20:13:43.062 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name buffer-exhausted-records
2018-03-13 20:13:43.217 DEBUG 20653 --- [ main] org.apache.kafka.clients.Metadata : Updated cluster metadata version 1 to Cluster(id = null, nodes = [some-elb.elb.us-west-2.amazonaws.com:9094 (id: -1 rack: null)], partitions = [])
2018-03-13 20:13:45.670 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name produce-throttle-time
2018-03-13 20:13:45.909 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name connections-closed:
2018-03-13 20:13:45.923 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name connections-created:
2018-03-13 20:13:45.935 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name successful-authentication:
2018-03-13 20:13:45.946 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name failed-authentication:
2018-03-13 20:13:45.958 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name bytes-sent-received:
2018-03-13 20:13:45.968 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name bytes-sent:
2018-03-13 20:13:45.990 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name bytes-received:
2018-03-13 20:13:46.005 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name select-time:
2018-03-13 20:13:46.025 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name io-time:
2018-03-13 20:13:46.130 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name batch-size
2018-03-13 20:13:46.139 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name compression-rate
2018-03-13 20:13:46.147 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name queue-time
2018-03-13 20:13:46.156 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name request-time
2018-03-13 20:13:46.165 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name records-per-request
2018-03-13 20:13:46.179 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name record-retries
2018-03-13 20:13:46.189 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name errors
2018-03-13 20:13:46.199 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name record-size
2018-03-13 20:13:46.250 DEBUG 20653 --- [ main] org.apache.kafka.common.metrics.Metrics : Added sensor with name batch-split-rate
2018-03-13 20:13:46.275 DEBUG 20653 --- [ad | producer-1] o.a.k.clients.producer.internals.Sender : [Producer clientId=producer-1] Starting Kafka producer I/O thread.
2018-03-13 20:13:46.329 INFO 20653 --- [ main] o.a.kafka.common.utils.AppInfoParser : Kafka version : 1.0.0
2018-03-13 20:13:46.333 INFO 20653 --- [ main] o.a.kafka.common.utils.AppInfoParser : Kafka commitId : aaa7af6d4a11b29d
2018-03-13 20:13:46.369 DEBUG 20653 --- [ main] o.a.k.clients.producer.KafkaProducer : [Producer clientId=producer-1] Kafka producer started
2018-03-13 20:13:52.982 TRACE 20653 --- [ main] o.a.k.clients.producer.KafkaProducer : [Producer clientId=producer-1] Requesting metadata update for topic ssl-txn.
2018-03-13 20:13:52.987 TRACE 20653 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Found least loaded node some-elb.elb.us-west-2.amazonaws.com:9094 (id: -1 rack: null)
2018-03-13 20:13:52.987 DEBUG 20653 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Initialize connection to node some-elb.elb.us-west-2.amazonaws.com:9094 (id: -1 rack: null) for sending metadata request
2018-03-13 20:13:52.987 DEBUG 20653 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Initiating connection to node some-elb.elb.us-west-2.amazonaws.com:9094 (id: -1 rack: null)
2018-03-13 20:13:53.217 DEBUG 20653 --- [ad | producer-1] org.apache.kafka.common.metrics.Metrics : Added sensor with name node--1.bytes-sent
2018-03-13 20:13:53.219 DEBUG 20653 --- [ad | producer-1] org.apache.kafka.common.metrics.Metrics : Added sensor with name node--1.bytes-received
2018-03-13 20:13:53.219 DEBUG 20653 --- [ad | producer-1] org.apache.kafka.common.metrics.Metrics : Added sensor with name node--1.latency
2018-03-13 20:13:53.222 DEBUG 20653 --- [ad | producer-1] o.apache.kafka.common.network.Selector : [Producer clientId=producer-1] Created socket with SO_RCVBUF = 33488, SO_SNDBUF = 131376, SO_TIMEOUT = 0 to node -1
2018-03-13 20:13:53.224 TRACE 20653 --- [ad | producer-1] o.a.k.common.network.SslTransportLayer : SSLHandshake NEED_WRAP channelId -1, appReadBuffer pos 0, netReadBuffer pos 0, netWriteBuffer pos 0
2018-03-13 20:13:53.224 TRACE 20653 --- [ad | producer-1] o.a.k.common.network.SslTransportLayer : SSLHandshake handshakeWrap -1
2018-03-13 20:13:53.225 TRACE 20653 --- [ad | producer-1] o.a.k.common.network.SslTransportLayer : SSLHandshake NEED_WRAP channelId -1, handshakeResult Status = OK HandshakeStatus = NEED_UNWRAP
bytesConsumed = 0 bytesProduced = 326, appReadBuffer pos 0, netReadBuffer pos 0, netWriteBuffer pos 0
2018-03-13 20:13:53.226 TRACE 20653 --- [ad | producer-1] o.a.k.common.network.SslTransportLayer : SSLHandshake NEED_UNWRAP channelId -1, appReadBuffer pos 0, netReadBuffer pos 0, netWriteBuffer pos 326
2018-03-13 20:13:53.226 TRACE 20653 --- [ad | producer-1] o.a.k.common.network.SslTransportLayer : SSLHandshake handshakeUnwrap -1
2018-03-13 20:13:53.227 TRACE 20653 --- [ad | producer-1] o.a.k.common.network.SslTransportLayer : SSLHandshake handshakeUnwrap: handshakeStatus NEED_UNWRAP status BUFFER_UNDERFLOW
2018-03-13 20:13:53.227 TRACE 20653 --- [ad | producer-1] o.a.k.common.network.SslTransportLayer : SSLHandshake NEED_UNWRAP channelId -1, handshakeResult Status = BUFFER_UNDERFLOW HandshakeStatus = NEED_UNWRAP
bytesConsumed = 0 bytesProduced = 0, appReadBuffer pos 0, netReadBuffer pos 0, netWriteBuffer pos 326
2018-03-13 20:13:53.485 DEBUG 20653 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Completed connection to node -1. Fetching API versions.
2018-03-13 20:13:53.485 TRACE 20653 --- [ad | producer-1] org.apache.kafka.clients.NetworkClient : [Producer clientId=producer-1] Found least loaded node some-elb.elb.us-west-2.amazonaws.com:9094 (id: -1 rack: null)
2018-03-13 20:13:54.992 DEBUG 20653 --- [ main] o.a.k.clients.producer.KafkaProducer : [Producer clientId=producer-1] Exception occurred during message send:
org.apache.kafka.common.errors.TimeoutException: Failed to update metadata after 2000 ms.
2018-03-13 20:13:54.992 INFO 20653 --- [ main] c.i.aggregate.precompute.kafka.Producer : sent message in callback
java.util.concurrent.ExecutionException: org.apache.kafka.common.errors.TimeoutException: Failed to update metadata after 2000 ms.
at org.apache.kafka.clients.producer.KafkaProducer$FutureFailure.<init>(KafkaProducer.java:1124)
at org.apache.kafka.clients.producer.KafkaProducer.doSend(KafkaProducer.java:823)
at org.apache.kafka.clients.producer.KafkaProducer.send(KafkaProducer.java:760)
at com.intuit.aggregate.precompute.kafka.Producer.send(Producer.java:76)
at com.intuit.aggregate.precompute.Application.main(Application.java:58)
Caused by: org.apache.kafka.common.errors.TimeoutException: Failed to update metadata after 2000 ms.
Disconnected from the target VM, address: '127.0.0.1:53161', transport: 'socket'
答案 0 :(得分：1)
此问题是由于经纪人的证书不正确。 java有不同于scala / python的默认值，对于密码，这就是其他语言客户端工作的原因。但是也有一个类似的问题，然后他们启用了ssl登录经纪人并抓住了这个问题。