Replace Thread.sleep with Awaitility in integration tests

Replace fixed Thread.sleep calls with Awaitility's polling-based
waiting in MetricsITBase, DefaultMetadataTabletMapIT, and
MockResolverIT. This eliminates wasted wait time by polling for
the expected condition instead of sleeping for a fixed duration.

DriverBlockHoundIntegrationIT is left unchanged as its sleep is
intentional for BlockHound testing.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: dkropachev

integration-tests/pom.xml

@@ -223,6 +223,11 @@
       <artifactId>tools</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.awaitility</groupId>
+      <artifactId>awaitility</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
   <build>
     <plugins>

integration-tests/src/test/java/com/datastax/oss/driver/core/metadata/DefaultMetadataTabletMapIT.java

@@ -1,5 +1,7 @@
 package com.datastax.oss.driver.core.metadata;
 
+import static org.awaitility.Awaitility.await;
+
 import com.datastax.oss.driver.api.core.CqlIdentifier;
 import com.datastax.oss.driver.api.core.CqlSession;
 import com.datastax.oss.driver.api.core.config.DefaultDriverOption;
@@ -340,16 +342,15 @@ public void should_receive_each_tablet_exactly_once() {
   }
 
   private static boolean waitSessionLearnedTabletInfo(CqlSession session) {
-    if (isSessionLearnedTabletInfo(session)) {
-      return true;
-    }
-    // Wait till tablet update, which is async, is completed
     try {
-      Thread.sleep(200);
-    } catch (InterruptedException e) {
-      Thread.currentThread().interrupt();
+      await()
+          .atMost(Duration.ofSeconds(5))
+          .pollInterval(Duration.ofMillis(50))
+          .until(() -> isSessionLearnedTabletInfo(session));
+      return true;
+    } catch (org.awaitility.core.ConditionTimeoutException e) {
+      return false;
     }
-    return isSessionLearnedTabletInfo(session);
   }
 
   private static boolean checkIfRoutedProperly(CqlSession session, Statement stmt) {

integration-tests/src/test/java/com/datastax/oss/driver/core/metrics/MetricsITBase.java

@@ -174,11 +174,12 @@ public void should_evict_down_node_metrics_when_timeout_fires() throws Exception
       // trigger node1 UP -> DOWN
       eventBus.fire(NodeStateEvent.changed(NodeState.UP, NodeState.DOWN, node1));
 
-      Thread.sleep(expireAfter.toMillis());
-
       // then node-level metrics should be evicted from node1, but
       // node2 and node3 metrics should not have been evicted
-      await().untilAsserted(() -> assertNodeMetricsEvicted(session, node1));
+      await()
+          .atMost(expireAfter.plusSeconds(5))
+          .pollInterval(Duration.ofMillis(100))
+          .untilAsserted(() -> assertNodeMetricsEvicted(session, node1));
       assertNodeMetricsNotEvicted(session, node2);
       assertNodeMetricsNotEvicted(session, node3);
 
@@ -219,19 +220,25 @@ public void should_not_evict_down_node_metrics_when_node_is_back_up_before_timeo
       eventBus.fire(NodeStateEvent.changed(NodeState.UP, NodeState.FORCED_DOWN, node2));
       eventBus.fire(NodeStateEvent.removed(node3));
 
-      Thread.sleep(500);
+      // Wait for half the expiry window before bringing nodes back up
+      await().pollDelay(Duration.ofMillis(500)).atMost(Duration.ofSeconds(5)).until(() -> true);
 
       // trigger nodes DOWN -> UP, should cancel the timeouts
       eventBus.fire(NodeStateEvent.changed(NodeState.DOWN, NodeState.UP, node1));
       eventBus.fire(NodeStateEvent.changed(NodeState.FORCED_DOWN, NodeState.UP, node2));
       eventBus.fire(NodeStateEvent.added(node3));
 
-      Thread.sleep(expireAfter.toMillis());
-
-      // then no node-level metrics should be evicted
-      assertNodeMetricsNotEvicted(session, node1);
-      assertNodeMetricsNotEvicted(session, node2);
-      assertNodeMetricsNotEvicted(session, node3);
+      // Wait for the full expiry duration and verify metrics are never evicted
+      await()
+          .during(expireAfter)
+          .atMost(expireAfter.plusSeconds(5))
+          .pollInterval(Duration.ofMillis(200))
+          .untilAsserted(
+              () -> {
+                assertNodeMetricsNotEvicted(session, node1);
+                assertNodeMetricsNotEvicted(session, node2);
+                assertNodeMetricsNotEvicted(session, node3);
+              });
 
     } finally {
       AbstractMetricUpdater.MIN_EXPIRE_AFTER = Duration.ofMinutes(5);

integration-tests/src/test/java/com/datastax/oss/driver/core/resolver/MockResolverIT.java

@@ -24,6 +24,7 @@
 package com.datastax.oss.driver.core.resolver;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.awaitility.Awaitility.await;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
@@ -34,8 +35,6 @@
 import com.datastax.oss.driver.api.core.config.TypedDriverOption;
 import com.datastax.oss.driver.api.core.cql.ResultSet;
 import com.datastax.oss.driver.api.core.cql.Row;
-import com.datastax.oss.driver.api.core.cql.SimpleStatement;
-import com.datastax.oss.driver.api.core.cql.SimpleStatementBuilder;
 import com.datastax.oss.driver.api.core.metadata.Node;
 import com.datastax.oss.driver.api.testinfra.ccm.CcmBridge;
 import com.datastax.oss.driver.categories.IsolatedTests;
@@ -130,30 +129,16 @@ public void replace_cluster_test() {
       ccmBridge.create();
       ccmBridge.start();
       session = builder.build();
-      boolean allNodesUp = false;
-      int nodesUp = 0;
-      for (int i = 0; i < CLUSTER_WAIT_SECONDS; i++) {
-        try {
-          Collection<Node> nodes = session.getMetadata().getNodes().values();
-          nodesUp = 0;
-          for (Node node : nodes) {
-            if (node.getUpSinceMillis() > 0) {
-              nodesUp++;
-            }
-          }
-          if (nodesUp == numberOfNodes) {
-            allNodesUp = true;
-            break;
-          }
-          Thread.sleep(1000);
-        } catch (InterruptedException e) {
-          break;
-        }
-      }
-      if (!allNodesUp) {
+      final CqlSession firstSession = session;
+      try {
+        await()
+            .atMost(Duration.ofSeconds(CLUSTER_WAIT_SECONDS))
+            .pollInterval(Duration.ofSeconds(1))
+            .until(() -> countUpNodes(firstSession) == numberOfNodes);
+      } catch (org.awaitility.core.ConditionTimeoutException e) {
         LOG.error(
             "Driver sees only {} nodes UP instead of {} after waiting {}s",
-            nodesUp,
+            countUpNodes(firstSession),
             numberOfNodes,
             CLUSTER_WAIT_SECONDS);
       }
@@ -178,30 +163,15 @@ public void replace_cluster_test() {
         CcmBridge.builder().withNodes(numberOfNodes).withIpPrefix("127.0.1.").build()) {
       ccmBridge.create();
       ccmBridge.start();
-      boolean allNodesUp = false;
-      int nodesUp = 0;
-      for (int i = 0; i < CLUSTER_WAIT_SECONDS; i++) {
-        try {
-          Collection<Node> nodes = session.getMetadata().getNodes().values();
-          nodesUp = 0;
-          for (Node node : nodes) {
-            if (node.getUpSinceMillis() > 0) {
-              nodesUp++;
-            }
-          }
-          if (nodesUp == numberOfNodes) {
-            allNodesUp = true;
-            break;
-          }
-          Thread.sleep(1000);
-        } catch (InterruptedException e) {
-          break;
-        }
-      }
-      if (!allNodesUp) {
+      try {
+        await()
+            .atMost(Duration.ofSeconds(CLUSTER_WAIT_SECONDS))
+            .pollInterval(Duration.ofSeconds(1))
+            .until(() -> countUpNodes(session) == numberOfNodes);
+      } catch (org.awaitility.core.ConditionTimeoutException e) {
         LOG.error(
             "Driver sees only {} nodes UP instead of {} after waiting {}s",
-            nodesUp,
+            countUpNodes(session),
             numberOfNodes,
             CLUSTER_WAIT_SECONDS);
       }
@@ -269,30 +239,8 @@ public void cannot_reconnect_with_resolved_socket() {
       ccmBridge.create();
       ccmBridge.start();
       session = builder.build();
-      long endTime = System.currentTimeMillis() + CLUSTER_WAIT_SECONDS * 1000;
-      while (System.currentTimeMillis() < endTime) {
-        try {
-          nodes = session.getMetadata().getNodes().values();
-          int upNodes = 0;
-          for (Node node : nodes) {
-            if (node.getUpSinceMillis() > 0) {
-              upNodes++;
-            }
-          }
-          if (upNodes == 3) {
-            break;
-          }
-          // session.refreshSchema();
-          SimpleStatement statement =
-              new SimpleStatementBuilder("select * from system.local where key='local'")
-                  .setTimeout(Duration.ofSeconds(3))
-                  .build();
-          session.executeAsync(statement);
-          Thread.sleep(3000);
-        } catch (InterruptedException e) {
-          break;
-        }
-      }
+      final CqlSession firstUnusedSession = session;
+      awaitAllNodesUp(firstUnusedSession, 3);
       ResultSet rs = session.execute("select * from system.local where key='local'");
       assertThat(rs).isNotNull();
       Row row = rs.one();
@@ -329,29 +277,7 @@ public void cannot_reconnect_with_resolved_socket() {
             "test.cluster.fake", ccmBridge.getNodeIpAddress(3));
         ccmBridge.create();
         ccmBridge.start();
-        long endTime = System.currentTimeMillis() + CLUSTER_WAIT_SECONDS * 1000;
-        while (System.currentTimeMillis() < endTime) {
-          try {
-            nodes = session.getMetadata().getNodes().values();
-            int upNodes = 0;
-            for (Node node : nodes) {
-              if (node.getUpSinceMillis() > 0) {
-                upNodes++;
-              }
-            }
-            if (upNodes == 3) {
-              break;
-            }
-            SimpleStatement statement =
-                new SimpleStatementBuilder("select * from system.local where key='local'")
-                    .setTimeout(Duration.ofSeconds(3))
-                    .build();
-            session.executeAsync(statement);
-            Thread.sleep(3000);
-          } catch (InterruptedException e) {
-            break;
-          }
-        }
+        awaitAllNodesUp(session, 3);
         nodes = session.getMetadata().getNodes().values();
         assertThat(nodes).hasSize(3);
         Iterator<Node> iterator = nodes.iterator();
@@ -384,32 +310,34 @@ public void cannot_reconnect_with_resolved_socket() {
       // Now the driver should fail to reconnect since unresolved hostname is gone.
       ccmBridge.create();
       ccmBridge.start();
-      long endTime = System.currentTimeMillis() + CLUSTER_WAIT_SECONDS * 1000;
-      while (System.currentTimeMillis() < endTime) {
-        try {
-          nodes = session.getMetadata().getNodes().values();
-          int upNodes = 0;
-          for (Node node : nodes) {
-            if (node.getUpSinceMillis() > 0) {
-              upNodes++;
-            }
-          }
-          if (upNodes == 3) {
-            break;
-          }
-          // session.refreshSchema();
-          SimpleStatement statement =
-              new SimpleStatementBuilder("select * from system.local where key='local'")
-                  .setTimeout(Duration.ofSeconds(3))
-                  .build();
-          session.executeAsync(statement);
-          Thread.sleep(3000);
-        } catch (InterruptedException e) {
-          break;
-        }
-      }
+      awaitAllNodesUp(session, 3);
       session.execute("select * from system.local where key='local'");
     }
     session.close();
   }
+
+  private static int countUpNodes(CqlSession session) {
+    int count = 0;
+    for (Node node : session.getMetadata().getNodes().values()) {
+      if (node.getUpSinceMillis() > 0) {
+        count++;
+      }
+    }
+    return count;
+  }
+
+  private static void awaitAllNodesUp(CqlSession session, int expectedNodes) {
+    try {
+      await()
+          .atMost(Duration.ofSeconds(CLUSTER_WAIT_SECONDS))
+          .pollInterval(Duration.ofSeconds(1))
+          .until(() -> countUpNodes(session) == expectedNodes);
+    } catch (org.awaitility.core.ConditionTimeoutException e) {
+      LOG.error(
+          "Driver sees only {} nodes UP instead of {} after waiting {}s",
+          countUpNodes(session),
+          expectedNodes,
+          CLUSTER_WAIT_SECONDS);
+    }
+  }
 }