dlmarion commented on code in PR #6209:
URL: https://github.com/apache/accumulo/pull/6209#discussion_r2926647051
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test/src/main/java/org/apache/accumulo/test/MultipleManagerStartupWaitIT.java:
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@@ -0,0 +1,88 @@
+package org.apache.accumulo.test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicReference;
+
+import org.apache.accumulo.core.Constants;
+import org.apache.accumulo.core.client.admin.servers.ServerId;
+import org.apache.accumulo.core.conf.Property;
+import org.apache.accumulo.core.data.ResourceGroupId;
+import org.apache.accumulo.miniclusterImpl.MiniAccumuloConfigImpl;
+import org.apache.accumulo.test.functional.ConfigurableMacBase;
+import org.apache.accumulo.test.util.Wait;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.zookeeper.KeeperException;
+import org.junit.jupiter.api.Test;
+
+public class MultipleManagerStartupWaitIT extends ConfigurableMacBase {
+
+ @Override
+ protected void configure(MiniAccumuloConfigImpl cfg, Configuration
hadoopCoreSite) {
+ // Set this lower so that locks timeout faster
+ cfg.setProperty(Property.INSTANCE_ZK_TIMEOUT, "5s");
+ cfg.setProperty(Property.MANAGER_STARTUP_MANAGER_AVAIL_MIN_COUNT, "2");
+ cfg.setProperty(Property.MANAGER_STARTUP_MANAGER_AVAIL_MAX_WAIT, "10s");
+ super.configure(cfg, hadoopCoreSite);
+ }
+
+ @Override
+ public void setUp() throws Exception {
+ // Overriding setup here so that the cluster
+ // is not started. We are going to start in
+ // manually in the test method
+ }
+
+ private List<String> getAssistantManagers() throws KeeperException,
InterruptedException {
+ String zAsstMgrPath = Constants.ZMANAGER_ASSISTANT_LOCK + "/" +
ResourceGroupId.DEFAULT;
+ return
getCluster().getServerContext().getZooSession().getChildren(zAsstMgrPath, null);
+ }
+
+ @Test
+ public void testManagerWait() throws Exception {
+
+ AtomicReference<Throwable> startError = new AtomicReference<>();
+ Thread clusterThread = new Thread(() -> {
+ try {
+ super.setUp();
+ } catch (Exception e) {
+ startError.set(e);
+ }
+ });
+ clusterThread.start();
+
+ // Wait a few seconds for processes to start and
+ // for ServerContext to be created
+ Thread.sleep(10_000);
Review Comment:
The sleep is needed to allow Mini some time to start up and set the
ServerContext. The call to `getCluster().getServerContext()` will return null.
I could probably add a wait for it to be non-null and remove this sleep.
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