Github user rmetzger commented on a diff in the pull request:
https://github.com/apache/flink/pull/589#discussion_r28227273
--- Diff:
flink-staging/flink-streaming/flink-streaming-connectors/src/main/java/org/apache/flink/streaming/connectors/kafka/api/simple/iterator/KafkaSinglePartitionIterator.java
---
@@ -111,18 +128,38 @@ public void initialize() throws InterruptedException {
} while (metadata == null);
if (metadata.leader() == null) {
- throw new RuntimeException("Can't find Leader for Topic
and Partition. (at " + hosts.get(0)
- + ":" + port);
+ throw new RuntimeException("Can't find Leader for Topic
and Partition. (at " + hosts + ")");
}
- leadBroker = metadata.leader().host();
+ leadBroker = metadata.leader();
clientName = "Client_" + topic + "_" + partition;
- consumer = new SimpleConsumer(leadBroker, port,
connectTimeoutMs, bufferSize, clientName);
+ consumer = new SimpleConsumer(leadBroker.host(),
leadBroker.port(), connectTimeoutMs, bufferSize, clientName);
+
+ try {
+ readOffset = initialOffset.getOffset(consumer, topic,
partition, clientName);
+ } catch (NotLeaderForPartitionException e) {
+ do {
+
+ metadata = findLeader(hosts, topic, partition);
- readOffset = initialOffset.getOffset(consumer, topic,
partition, clientName);
+ try {
+
Thread.sleep(DEFAULT_WAIT_ON_EMPTY_FETCH);
+ } catch (InterruptedException ie) {
+ throw new
InterruptedException("Establishing connection to Kafka failed");
+ }
+ } while (metadata == null);
--- End diff --
This loop also might run forever
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