chia7712 commented on code in PR #15928:
URL: https://github.com/apache/kafka/pull/15928#discussion_r1597930023
##########
core/src/test/java/kafka/test/junit/RaftClusterInvocationContext.java:
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@@ -111,6 +111,9 @@ public List<Extension> getAdditionalExtensions() {
cluster.format();
if (clusterConfig.isAutoStart()) {
cluster.startup();
+ if(!clusterInstance.started.compareAndSet(false,true)){
Review Comment:
Could you please do a bit refactor for it? It seems to me those code used to
"start" a cluster should be moved to `RaftClusterInstance#start`. Otherwise,
`RaftClusterInstance#start` is unused and not working because it does not
format the storage.
In short, the impl of this extension should look like following code.
```java
@Override
public List<Extension> getAdditionalExtensions() {
RaftClusterInstance clusterInstance = new
RaftClusterInstance(clusterConfig, isCombined);
return Arrays.asList(
(BeforeTestExecutionCallback) context -> {
if (clusterConfig.isAutoStart()) {
clusterInstance.start();
}
},
(AfterTestExecutionCallback) context -> clusterInstance.stop(),
new ClusterInstanceParameterResolver(clusterInstance)
);
}
```
Also, `RaftClusterInstance#start` could be:
```java
@Override
public void start() {
if (started.compareAndSet(false, true)) {
try {
TestKitNodes nodes = new TestKitNodes.Builder().
setBootstrapMetadataVersion(clusterConfig.metadataVersion()).
setCombined(isCombined).
setNumBrokerNodes(clusterConfig.numBrokers()).
setPerServerProperties(clusterConfig.perServerOverrideProperties()).
setNumDisksPerBroker(clusterConfig.numDisksPerBroker()).
setNumControllerNodes(clusterConfig.numControllers()).build();
KafkaClusterTestKit.Builder builder = new
KafkaClusterTestKit.Builder(nodes);
if
(Boolean.parseBoolean(clusterConfig.serverProperties().getOrDefault("zookeeper.metadata.migration.enable",
"false"))) {
embeddedZookeeper = new EmbeddedZookeeper();
builder.setConfigProp("zookeeper.connect",
String.format("localhost:%d", embeddedZookeeper.port()));
}
// Copy properties into the TestKit builder
clusterConfig.serverProperties().forEach(builder::setConfigProp);
// KAFKA-12512 need to pass security protocol and
listener name here
testKit = builder.build();
testKit.format();
testKit.startup();
kafka.utils.TestUtils.waitUntilTrue(
() -> testKit.brokers().get(0).brokerState() ==
BrokerState.RUNNING,
() -> "Broker never made it to RUNNING state.",
org.apache.kafka.test.TestUtils.DEFAULT_MAX_WAIT_MS,
100L);
} catch (Exception e) {
throw new RuntimeException("Failed to start Raft
server", e);
}
}
}
```
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