Stabilize AdvancedShardAwarenessIT

This test class recently fails with various causes.
The following modifications were made:
- Instead of waiting fixed amount of time for some tests, each test will await
  until all pools are initialized before checking the logs or the test
  times out.
- Tolerance for additional reconnections was slighlty increased. It is still
  set to much lower number than what appears when running scenario without
  advanced shard awareness.
- Configured size of channel pools  was halved in the tests that used to create
  over 200 total channels. This should alleviate occasional bind exceptions.
- The reconnection delays were increased. They were intentionally low to cause
  congestion, but it was too much for github actions.
- Scanning for patterns in the logs is now done using the copy to avoid
  exceptions related to concurrent modification.
- Commented out general checks for "Reconnection attempt complete". Those are
  already covered by more speficic patterns that include cluster's IP and
  it seems this general version collides with logs from other tests.
  This should not be happening but that's a separate, larger issue.

Author: Bouncheck

integration-tests/src/test/java/com/datastax/oss/driver/core/pool/AdvancedShardAwarenessIT.java

@@ -10,27 +10,31 @@
 import com.datastax.oss.driver.api.core.CqlSessionBuilder;
 import com.datastax.oss.driver.api.core.config.DefaultDriverOption;
 import com.datastax.oss.driver.api.core.config.DriverConfigLoader;
-import com.datastax.oss.driver.api.core.session.Session;
+import com.datastax.oss.driver.api.core.metadata.Node;
 import com.datastax.oss.driver.api.testinfra.ScyllaOnly;
 import com.datastax.oss.driver.api.testinfra.ccm.CustomCcmRule;
 import com.datastax.oss.driver.api.testinfra.session.SessionUtils;
 import com.datastax.oss.driver.internal.core.pool.ChannelPool;
+import com.datastax.oss.driver.internal.core.session.DefaultSession;
 import com.datastax.oss.driver.internal.core.util.concurrent.CompletableFutures;
 import com.datastax.oss.driver.internal.core.util.concurrent.Reconnection;
+import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableSet;
-import com.google.common.util.concurrent.Uninterruptibles;
 import com.tngtech.java.junit.dataprovider.DataProvider;
 import com.tngtech.java.junit.dataprovider.DataProviderRunner;
 import com.tngtech.java.junit.dataprovider.UseDataProvider;
 import java.net.InetSocketAddress;
 import java.time.Duration;
+import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.CompletionStage;
 import java.util.concurrent.TimeUnit;
 import java.util.regex.Pattern;
+import org.awaitility.Awaitility;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.ClassRule;
@@ -92,11 +96,14 @@ public void stopCapturingLogs() {
   @Test
   @UseDataProvider("reuseAddressOption")
   public void should_initialize_all_channels(boolean reuseAddress) {
+    int poolLocalSizeSetting = 4; // Will round up to 6 due to not being divisible by 3 shards
+    int expectedChannelsPerNode = 6;
     Map<Pattern, Integer> expectedOccurences =
         ImmutableMap.of(
             Pattern.compile(".*\\.2:19042.*Reconnection attempt complete, 6/6 channels.*"), 1,
             Pattern.compile(".*\\.1:19042.*Reconnection attempt complete, 6/6 channels.*"), 1,
-            Pattern.compile(".*Reconnection attempt complete.*"), 2,
+            // Temporarily commented out because hanging sessions from other tests pollute logs
+            // Pattern.compile(".*Reconnection attempt complete.*"), 2,
             Pattern.compile(".*\\.1:19042.*New channel added \\[.*"), 5,
             Pattern.compile(".*\\.2:19042.*New channel added \\[.*"), 5,
             Pattern.compile(".*\\.1:19042\\] Trying to create 5 missing channels.*"), 1,
@@ -107,52 +114,63 @@ public void should_initialize_all_channels(boolean reuseAddress) {
             .withBoolean(DefaultDriverOption.CONNECTION_ADVANCED_SHARD_AWARENESS_ENABLED, true)
             .withInt(DefaultDriverOption.ADVANCED_SHARD_AWARENESS_PORT_LOW, 10000)
             .withInt(DefaultDriverOption.ADVANCED_SHARD_AWARENESS_PORT_HIGH, 60000)
-            // Due to rounding up the connections per shard this will result in 6 connections per
-            // node
-            .withInt(DefaultDriverOption.CONNECTION_POOL_LOCAL_SIZE, 4)
+            .withInt(DefaultDriverOption.CONNECTION_POOL_LOCAL_SIZE, poolLocalSizeSetting)
             .build();
-    try (Session session =
+    try (CqlSession session =
         CqlSession.builder()
             .addContactPoint(
                 new InetSocketAddress(CCM_RULE.getCcmBridge().getNodeIpAddress(1), 19042))
             .withConfigLoader(loader)
             .build()) {
-      Uninterruptibles.sleepUninterruptibly(1, TimeUnit.SECONDS);
+      List<CqlSession> allSessions = Collections.singletonList(session);
+      Awaitility.await()
+          .atMost(20, TimeUnit.SECONDS)
+          .pollInterval(500, TimeUnit.MILLISECONDS)
+          .until(() -> areAllPoolsFullyInitialized(allSessions, expectedChannelsPerNode));
+      List<ILoggingEvent> logsCopy = ImmutableList.copyOf(appender.list);
       expectedOccurences.forEach(
-          (pattern, times) -> assertMatchesExactly(pattern, times, appender.list));
-      forbiddenOccurences.forEach(pattern -> assertNoLogMatches(pattern, appender.list));
+          (pattern, times) -> assertMatchesExactly(pattern, times, logsCopy));
+      forbiddenOccurences.forEach(pattern -> assertNoLogMatches(pattern, logsCopy));
     }
   }
 
   @Test
   public void should_see_mismatched_shard() {
+    int expectedChannelsPerNode = 33;
     DriverConfigLoader loader =
         SessionUtils.configLoaderBuilder()
             .withBoolean(DefaultDriverOption.CONNECTION_ADVANCED_SHARD_AWARENESS_ENABLED, true)
             .withInt(DefaultDriverOption.ADVANCED_SHARD_AWARENESS_PORT_LOW, 10000)
             .withInt(DefaultDriverOption.ADVANCED_SHARD_AWARENESS_PORT_HIGH, 60000)
-            .withInt(DefaultDriverOption.CONNECTION_POOL_LOCAL_SIZE, 64)
+            .withInt(DefaultDriverOption.CONNECTION_POOL_LOCAL_SIZE, expectedChannelsPerNode)
             .build();
-    try (Session session =
+    try (CqlSession session =
         CqlSession.builder()
             .addContactPoint(
                 new InetSocketAddress(CCM_RULE.getCcmBridge().getNodeIpAddress(1), 9042))
             .withConfigLoader(loader)
             .build()) {
-      Uninterruptibles.sleepUninterruptibly(1, TimeUnit.SECONDS);
-      assertMatchesAtLeast(shardMismatchPattern, 5, appender.list);
+      List<CqlSession> allSessions = Collections.singletonList(session);
+      Awaitility.await()
+          .atMost(20, TimeUnit.SECONDS)
+          .pollInterval(500, TimeUnit.MILLISECONDS)
+          // Waits until 2/3rds are initialized instead of all. It does not matter here.
+          .until(() -> areAllPoolsFullyInitialized(allSessions, expectedChannelsPerNode * 2 / 3));
+      List<ILoggingEvent> logsCopy = ImmutableList.copyOf(appender.list);
+      assertMatchesAtLeast(shardMismatchPattern, 5, logsCopy);
     }
   }
 
   // There is no need to run this as a test, but it serves as a comparison
   @SuppressWarnings("unused")
   public void should_struggle_to_fill_pools() {
+    int expectedChannelsPerNode = 33; // Divisible by number of shards
     DriverConfigLoader loader =
         SessionUtils.configLoaderBuilder()
             .withBoolean(DefaultDriverOption.CONNECTION_ADVANCED_SHARD_AWARENESS_ENABLED, false)
-            .withInt(DefaultDriverOption.CONNECTION_POOL_LOCAL_SIZE, 64)
-            .withDuration(DefaultDriverOption.RECONNECTION_BASE_DELAY, Duration.ofMillis(200))
-            .withDuration(DefaultDriverOption.RECONNECTION_MAX_DELAY, Duration.ofMillis(4000))
+            .withInt(DefaultDriverOption.CONNECTION_POOL_LOCAL_SIZE, expectedChannelsPerNode)
+            .withDuration(DefaultDriverOption.RECONNECTION_BASE_DELAY, Duration.ofSeconds(1))
+            .withDuration(DefaultDriverOption.RECONNECTION_MAX_DELAY, Duration.ofSeconds(20))
             .build();
     CqlSessionBuilder builder =
         CqlSession.builder()
@@ -167,20 +185,26 @@ public void should_struggle_to_fill_pools() {
         CqlSession session2 = CompletableFutures.getUninterruptibly(stage2);
         CqlSession session3 = CompletableFutures.getUninterruptibly(stage3);
         CqlSession session4 = CompletableFutures.getUninterruptibly(stage4); ) {
-      Uninterruptibles.sleepUninterruptibly(20, TimeUnit.SECONDS);
-      assertNoLogMatches(shardMismatchPattern, appender.list);
-      assertMatchesAtLeast(reconnectionPattern, 8, appender.list);
+      List<CqlSession> allSessions = Arrays.asList(session1, session2, session3, session4);
+      Awaitility.await()
+          .atMost(20, TimeUnit.SECONDS)
+          .pollInterval(500, TimeUnit.MILLISECONDS)
+          .until(() -> areAllPoolsFullyInitialized(allSessions, expectedChannelsPerNode));
+      List<ILoggingEvent> logsCopy = ImmutableList.copyOf(appender.list);
+      assertNoLogMatches(shardMismatchPattern, logsCopy);
+      assertMatchesAtLeast(reconnectionPattern, 8, logsCopy);
     }
   }
 
   @Test
   public void should_not_struggle_to_fill_pools() {
+    int expectedChannelsPerNode = 33; // Divisible by number of shards
     DriverConfigLoader loader =
         SessionUtils.configLoaderBuilder()
             .withBoolean(DefaultDriverOption.CONNECTION_ADVANCED_SHARD_AWARENESS_ENABLED, true)
-            .withInt(DefaultDriverOption.CONNECTION_POOL_LOCAL_SIZE, 66)
-            .withDuration(DefaultDriverOption.RECONNECTION_BASE_DELAY, Duration.ofMillis(10))
-            .withDuration(DefaultDriverOption.RECONNECTION_MAX_DELAY, Duration.ofMillis(20))
+            .withInt(DefaultDriverOption.CONNECTION_POOL_LOCAL_SIZE, expectedChannelsPerNode)
+            .withDuration(DefaultDriverOption.RECONNECTION_BASE_DELAY, Duration.ofSeconds(1))
+            .withDuration(DefaultDriverOption.RECONNECTION_MAX_DELAY, Duration.ofSeconds(20))
             .build();
     CqlSessionBuilder builder =
         CqlSession.builder()
@@ -196,25 +220,54 @@ public void should_not_struggle_to_fill_pools() {
         CqlSession session2 = CompletableFutures.getUninterruptibly(stage2);
         CqlSession session3 = CompletableFutures.getUninterruptibly(stage3);
         CqlSession session4 = CompletableFutures.getUninterruptibly(stage4); ) {
-      Uninterruptibles.sleepUninterruptibly(8, TimeUnit.SECONDS);
-      int tolerance = 2; // Sometimes socket ends up already in use
+
+      List<CqlSession> allSessions = Arrays.asList(session1, session2, session3, session4);
+      Awaitility.await()
+          .atMost(20, TimeUnit.SECONDS)
+          .pollInterval(500, TimeUnit.MILLISECONDS)
+          .until(() -> areAllPoolsFullyInitialized(allSessions, expectedChannelsPerNode));
+
+      int tolerance = 4; // Sometimes socket ends up already in use
       Map<Pattern, Integer> expectedOccurences =
           ImmutableMap.of(
-              Pattern.compile(".*\\.2:19042.*Reconnection attempt complete, 66/66 channels.*"),
+              Pattern.compile(".*\\.2:19042.*Reconnection attempt complete, 33/33 channels.*"),
                   1 * sessions,
-              Pattern.compile(".*\\.1:19042.*Reconnection attempt complete, 66/66 channels.*"),
+              Pattern.compile(".*\\.1:19042.*Reconnection attempt complete, 33/33 channels.*"),
                   1 * sessions,
-              Pattern.compile(".*Reconnection attempt complete.*"), 2 * sessions,
-              Pattern.compile(".*.1:19042.*New channel added \\[.*"), 65 * sessions - tolerance,
-              Pattern.compile(".*.2:19042.*New channel added \\[.*"), 65 * sessions - tolerance,
-              Pattern.compile(".*.1:19042\\] Trying to create 65 missing channels.*"), 1 * sessions,
-              Pattern.compile(".*.2:19042\\] Trying to create 65 missing channels.*"),
+              // Temporarily commented out because hanging sessions from other tests pollute logs
+              // Pattern.compile(".*Reconnection attempt complete.*"), 2 * sessions,
+              Pattern.compile(".*.1:19042.*New channel added \\[.*"), 32 * sessions - tolerance,
+              Pattern.compile(".*.2:19042.*New channel added \\[.*"), 32 * sessions - tolerance,
+              Pattern.compile(".*.1:19042\\] Trying to create 32 missing channels.*"), 1 * sessions,
+              Pattern.compile(".*.2:19042\\] Trying to create 32 missing channels.*"),
                   1 * sessions);
+      List<ILoggingEvent> logsCopy = ImmutableList.copyOf(appender.list);
       expectedOccurences.forEach(
-          (pattern, times) -> assertMatchesAtLeast(pattern, times, appender.list));
-      assertNoLogMatches(shardMismatchPattern, appender.list);
-      assertMatchesAtMost(reconnectionPattern, tolerance, appender.list);
+          (pattern, times) -> assertMatchesAtLeast(pattern, times, logsCopy));
+      assertNoLogMatches(shardMismatchPattern, logsCopy);
+      assertMatchesAtMost(reconnectionPattern, tolerance, logsCopy);
+    }
+  }
+
+  private boolean areAllPoolsFullyInitialized(
+      List<CqlSession> sessions, int expectedChannelsPerNode) {
+    for (CqlSession session : sessions) {
+      DefaultSession defaultSession = (DefaultSession) session;
+      Map<Node, ChannelPool> pools = defaultSession.getPools();
+      if (pools == null || pools.isEmpty()) {
+        return false;
+      }
+
+      for (ChannelPool pool : pools.values()) {
+        if (pool == null) {
+          return false;
+        }
+        if (pool.size() < expectedChannelsPerNode) {
+          return false;
+        }
+      }
     }
+    return true;
   }
 
   private void assertNoLogMatches(Pattern pattern, List<ILoggingEvent> logs) {