本文介紹了Kafka Java使用者SSL握手錯(cuò)誤：java.security.cert.cerfiateException：不存在使用者替代名稱的處理方法，對(duì)大家解決問題具有一定的參考價(jià)值，需要的朋友們下面隨著小編來一起學(xué)習(xí)吧！
問題描述
我正在運(yùn)行Kafka 2.13-2.4.1，并在用Java編寫的Kafka客戶端(消費(fèi)者)和Kafka集群(3個(gè)節(jié)點(diǎn)，每個(gè)節(jié)點(diǎn)有一個(gè)Broker)之間配置一個(gè)SSL連接。
我通過Confluent’s Documentation使用官方文檔，它有單向身份驗(yàn)證(客戶端沒有證書)，它不起作用，所以我不得不使用兩種方式進(jìn)行身份驗(yàn)證，然后消費(fèi)者和生產(chǎn)者控制臺(tái)都通過SSL進(jìn)行通信，但當(dāng)我使用我的Java消費(fèi)者應(yīng)用程序時(shí)：
package kafkaconsumerssl;
import java.time.Duration;
import java.util.Arrays;
import java.util.Properties;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.common.KafkaException;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
public class KafkaConsumerSSLTest {
public static void main(String[] args) throws KafkaException {
Properties props = new Properties();
props.put("security.protocol", "SSL");
props.put("ssl.endpoint.identification.algorithm=", "");
props.put("ssl.truststore.location","/var/private/ssl/kafka.client.truststore.jks");
props.put("ssl.truststore.password","*******");
props.put("ssl.keystore.location", "/var/private/ssl/kafka.client.keystore.jks");
props.put("ssl.keystore.password", "********");
props.put("ssl.key.password", "*******");
props.put("acks", "all");
props.put("retries", "0");
props.setProperty("zk.connnect", "172.31.32.219:2181,172.31.41.226:2181,172.31.33.133:2181");
props.setProperty("group.id", "ConsumersTest");
props.setProperty("auto.offset.reset","earliest");
props.setProperty("enable.auto.commit", "true");
props.setProperty("auto.commit.interval.ms", "1000");
props.setProperty("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
props.setProperty("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
props.setProperty("bootstrap.servers","172.31.41.226:9093,172.31.33.133:9093,172.31.32.219:9093");
KafkaConsumer<String, String> consumer = new KafkaConsumer<>(props);
consumer.subscribe(Arrays.asList("testKafka"));
ConsumerRecords<String,String> messages = consumer.poll(Duration.ofMillis(4000));
System.out.printf("reading_records...
");
for (ConsumerRecord<String, String> record : messages) {
System.out.printf("offset= %d, key = %s, value = %s%n", record.offset(), record.key(), record.value());
}
consumer.close();
}}
我的Kafka Broker配置服務(wù)器.properties文件是：
ssl.truststore.location=/var/private/ssl/kafka.server.truststore.jks
ssl.truststore.password=*******
ssl.keystore.location=/var/private/ssl/kafka.server.keystore.jks
ssl.keystore.password=******
ssl.key.password=******
listeners=PLAINTEXT://172.31.41.226:9092,SSL://172.31.41.226:9093
advertised.listeners=SSL://172.31.41.226:9093,PLAINTEXT://172.31.41.226:9092
ssl.client.auth=required
#security.inter.broker.protocol=SSL
ssl.endpoint.identification.algorithm=
當(dāng)我運(yùn)行java -cp .:/opt/kafka/libs/* -Djavax.net.debug=ssl:handshake KafkaConsumerSSLTest2.java時(shí)，出現(xiàn)以下錯(cuò)誤：
javax.net.ssl|ERROR|01|main|2020-03-27 22:55:31.527 UTC|TransportContext.java:312|Fatal (CERTIFICATE_UNKNOWN): No subject alternative names present (
"throwable" : {
java.security.cert.CertificateException: No subject alternative names present
at java.base/sun.security.util.HostnameChecker.matchIP(HostnameChecker.java:137)
at java.base/sun.security.util.HostnameChecker.match(HostnameChecker.java:96)
at java.base/sun.security.ssl.X509TrustManagerImpl.checkIdentity(X509TrustManagerImpl.java:455)
at java.base/sun.security.ssl.X509TrustManagerImpl.checkIdentity(X509TrustManagerImpl.java:429)
at java.base/sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:283)
at java.base/sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:141)
at java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.checkServerCerts(CertificateMessage.java:623)
at java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.onCertificate(CertificateMessage.java:464)
at java.base/sun.security.ssl.CertificateMessage$T12CertificateConsumer.consume(CertificateMessage.java:360)
at java.base/sun.security.ssl.SSLHandshake.consume(SSLHandshake.java:392)
at java.base/sun.security.ssl.HandshakeContext.dispatch(HandshakeContext.java:443)
at java.base/sun.security.ssl.SSLEngineImpl$DelegatedTask$DelegatedAction.run(SSLEngineImpl.java:1061)
at java.base/sun.security.ssl.SSLEngineImpl$DelegatedTask$DelegatedAction.run(SSLEngineImpl.java:1048)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:770)
at java.base/sun.security.ssl.SSLEngineImpl$DelegatedTask.run(SSLEngineImpl.java:995)
at org.apache.kafka.common.network.SslTransportLayer.runDelegatedTasks(SslTransportLayer.java:402)
at org.apache.kafka.common.network.SslTransportLayer.handshakeUnwrap(SslTransportLayer.java:484)
at org.apache.kafka.common.network.SslTransportLayer.doHandshake(SslTransportLayer.java:340)
at org.apache.kafka.common.network.SslTransportLayer.handshake(SslTransportLayer.java:265)
at org.apache.kafka.common.network.KafkaChannel.prepare(KafkaChannel.java:170)
at org.apache.kafka.common.network.Selector.pollSelectionKeys(Selector.java:547)
at org.apache.kafka.common.network.Selector.poll(Selector.java:483)
at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:547)
at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:262)
at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:233)
at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:212)
at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:400)
at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:340)
at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:471)
at org.apache.kafka.clients.consumer.KafkaConsumer.updateAssignmentMetadataIfNeeded(KafkaConsumer.java:1267)
at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1231)
at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1211)
at kafkaconsumerssl.KafkaConsumerSSLTest.main(KafkaConsumerSSLTest2.java:40)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at jdk.compiler/com.sun.tools.javac.launcher.Main.execute(Main.java:404)
at jdk.compiler/com.sun.tools.javac.launcher.Main.run(Main.java:179)
at jdk.compiler/com.sun.tools.javac.launcher.Main.main(Main.java:119)}
)
javax.net.ssl|WARNING|01|main|2020-03-27 22:55:31.528 UTC|SSLEngineOutputRecord.java:168|outbound has closed, ignore outbound application data
[2020-03-27 22:55:31,529] ERROR [Consumer clientId=consumer-ConsumersTest-1, groupId=ConsumersTest] Connection to node 2147483645 (/172.31.32.219:9093) failed authentication due to: SSL handshake failed (org.apache.kafka.clients.NetworkClient:745)
Exception in thread "main" java.lang.IllegalArgumentException: 0 > -7
at java.base/java.util.Arrays.copyOfRange(Arrays.java:4021)
at java.base/java.util.Arrays.copyOfRange(Arrays.java:3981)
at jdk.compiler/com.sun.tools.javac.launcher.Main.execute(Main.java:416)
at jdk.compiler/com.sun.tools.javac.launcher.Main.run(Main.java:179)
at jdk.compiler/com.sun.tools.javac.launcher.Main.main(Main.java:119)
推薦答案
您必須將ssl.endpoint.identification.algorithm設(shè)置為空字符串(省略=)：
props.put("ssl.endpoint.identification.algorithm", "");
請(qǐng)注意，如果上述操作解決了問題，則意味著證書與您用來運(yùn)行使用者的計(jì)算機(jī)的主機(jī)名不匹配。
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