Add retry to Kafka Consumer Create in source

Signed-off-by: Jonah Calvo <caljonah@amazon.com>
opensearch-project · Sep 28, 2023 · e2aaf35 · e2aaf35
1 parent 63695e9
commit e2aaf35
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Showing 2 changed files with 61 additions and 13 deletions.
diff --git a/...ka-plugins/src/main/java/org/opensearch/dataprepper/plugins/kafka/source/KafkaSource.java b/...ka-plugins/src/main/java/org/opensearch/dataprepper/plugins/kafka/source/KafkaSource.java
@@ -21,6 +21,7 @@
 import org.apache.kafka.clients.admin.KafkaAdminClient;
 import org.apache.kafka.clients.consumer.ConsumerConfig;
 import org.apache.kafka.clients.consumer.KafkaConsumer;
+import org.apache.kafka.common.config.ConfigException;
 import org.apache.kafka.common.errors.BrokerNotAvailableException;
 import org.apache.kafka.common.errors.UnknownTopicOrPartitionException;
 import org.apache.kafka.common.serialization.StringDeserializer;
@@ -82,6 +83,8 @@
 @SuppressWarnings("deprecation")
 @DataPrepperPlugin(name = "kafka", pluginType = Source.class, pluginConfigurationType = KafkaSourceConfig.class)
 public class KafkaSource implements Source<Record<Event>> {
+    private static final String NO_RESOLVABLE_URLS_ERROR_MESSAGE = "No resolvable bootstrap urls given in bootstrap.servers";
+    private static final long RETRY_SLEEP_INTERVAL = 30000;
     private static final Logger LOG = LoggerFactory.getLogger(KafkaSource.class);
     private final KafkaSourceConfig sourceConfig;
     private AtomicBoolean shutdownInProgress;
@@ -130,22 +133,25 @@ public void start(Buffer<Record<Event>> buffer) {
                 allTopicExecutorServices.add(executorService);
 
                 IntStream.range(0, numWorkers).forEach(index -> {
-                    switch (schema) {
-                        case JSON:
-                            kafkaConsumer = new KafkaConsumer<String, JsonNode>(consumerProperties);
+                    while (true) {
+                        try {
+                            kafkaConsumer = createKafkaConsumer(schema, consumerProperties);
                             break;
-                        case AVRO:
-                            kafkaConsumer = new KafkaConsumer<String, GenericRecord>(consumerProperties);
-                            break;
-                        case PLAINTEXT:
-                        default:
-                            glueDeserializer = KafkaSourceSecurityConfigurer.getGlueSerializer(sourceConfig);
-                            if (Objects.nonNull(glueDeserializer)) {
-                                kafkaConsumer = new KafkaConsumer(consumerProperties, stringDeserializer, glueDeserializer);
+                        } catch (ConfigException ce) {
+                            if (ce.getMessage().contains(NO_RESOLVABLE_URLS_ERROR_MESSAGE)) {
+                                LOG.warn("Exception while creating Kafka consumer: ", ce);
+                                LOG.warn("Bootstrap URL could not be resolved. Retrying in {} ms...", RETRY_SLEEP_INTERVAL);
+                                try {
+                                    sleep(RETRY_SLEEP_INTERVAL);
+                                } catch (InterruptedException ie) {
+                                    Thread.currentThread().interrupt();
+                                    throw new RuntimeException(ie);
+                                }
                             } else {
-                                kafkaConsumer = new KafkaConsumer<String, String>(consumerProperties);
+                                throw ce;
                             }
-                            break;
+                        }
+
                     }
                     consumer = new KafkaSourceCustomConsumer(kafkaConsumer, shutdownInProgress, buffer, sourceConfig, topic, schemaType, acknowledgementSetManager, topicMetrics);
                     allTopicConsumers.add(consumer);
@@ -165,6 +171,23 @@ public void start(Buffer<Record<Event>> buffer) {
         });
     }
 
+    public KafkaConsumer<?, ?> createKafkaConsumer(final MessageFormat schema, final Properties consumerProperties) {
+        switch (schema) {
+            case JSON:
+                return new KafkaConsumer<String, JsonNode>(consumerProperties);
+            case AVRO:
+                 return new KafkaConsumer<String, GenericRecord>(consumerProperties);
+            case PLAINTEXT:
+            default:
+                glueDeserializer = KafkaSourceSecurityConfigurer.getGlueSerializer(sourceConfig);
+                if (Objects.nonNull(glueDeserializer)) {
+                    return new KafkaConsumer(consumerProperties, stringDeserializer, glueDeserializer);
+                } else {
+                    return new KafkaConsumer<String, String>(consumerProperties);
+                }
+        }
+    }
+
     @Override
     public void stop() {
         shutdownInProgress.set(true);
@@ -485,4 +508,8 @@ private String getMaskedBootStrapDetails(String serverIP) {
         }
         return maskedString.append(serverIP.substring(maskedLength)).toString();
     }
+
+    protected void sleep(final long millis) throws InterruptedException {
+        Thread.sleep(millis);
+    }
 }
diff --git a/...lugins/src/test/java/org/opensearch/dataprepper/plugins/kafka/source/KafkaSourceTest.java b/...lugins/src/test/java/org/opensearch/dataprepper/plugins/kafka/source/KafkaSourceTest.java
@@ -5,6 +5,7 @@
 
 package org.opensearch.dataprepper.plugins.kafka.source;
 
+import org.apache.kafka.common.config.ConfigException;
 import org.opensearch.dataprepper.model.buffer.Buffer;
 import org.opensearch.dataprepper.model.record.Record;
 import org.opensearch.dataprepper.model.event.Event;
@@ -25,7 +26,13 @@
 import org.mockito.junit.jupiter.MockitoExtension;
 import org.mockito.junit.jupiter.MockitoSettings;
 import org.mockito.quality.Strictness;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.doThrow;
 import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.when;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
@@ -135,4 +142,18 @@ void test_kafkaSource_basicFunctionality() {
         kafkaSource.start(buffer);
         assertTrue(Objects.nonNull(kafkaSource.getConsumer()));
     }
+
+    @Test
+    void test_kafkaSource_retry_consumer_create() throws InterruptedException {
+        when(topic1.getSessionTimeOut()).thenReturn(Duration.ofSeconds(15));
+        when(topic2.getSessionTimeOut()).thenReturn(Duration.ofSeconds(15));
+        kafkaSource = spy(createObjectUnderTest());
+        doNothing().when(kafkaSource).sleep(anyLong());
+
+        doThrow(new ConfigException("No resolvable bootstrap urls given in bootstrap.servers"))
+            .doCallRealMethod()
+            .when(kafkaSource)
+            .createKafkaConsumer(any(), any());
+        kafkaSource.start(buffer);
+    }
 }