AHeise commented on a change in pull request #16108:
URL: https://github.com/apache/flink/pull/16108#discussion_r760025683
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File path:
flink-connectors/flink-connector-kafka/src/test/java/org/apache/flink/streaming/connectors/kafka/KafkaTestEnvironmentImpl.java
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@@ -125,7 +125,10 @@ public void prepare(Config config) throws Exception {
zookeeper = null;
brokers.clear();
- zookeeper = new TestingServer(-1, tmpZkDir);
+ synchronized (KafkaTestEnvironmentImpl.class) {
+ zookeeper = new TestingServer(-1, tmpZkDir);
+ }
+
Review comment:
This will probably not do anything. The issue is that multiple parallel
processes are competing for the port on the same machine. Kafka tests are only
executed non-parallel afaik, so there will never be 2 threads competing for the
same port.
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