Ratis CI: Fixed the ratis CI port clash & Optimized the logs to avoid printing JVM crash

iotdb-core/consensus/src/test/java/org/apache/iotdb/consensus/ratis/RecoverReadTest.java

@@ -82,6 +82,7 @@ public boolean takeSnapshot(File snapshotDir) {
   @Before
   public void setUp() throws Exception {
     logger.info("[RECOVER TEST] start setting up the test env");
+    TestUtils.prepareJvmForRatisTest();
     final TestUtils.MiniClusterFactory factory = new TestUtils.MiniClusterFactory();
     miniCluster =
         factory
@@ -117,8 +118,12 @@ public void setUp() throws Exception {
   @After
   public void tearUp() throws Exception {
     logger.info("[RECOVER TEST] start tearing down the test env");
-    miniCluster.cleanUp();
-    logger.info("[RECOVER TEST] end tearing down the test env");
+    try {
+      miniCluster.cleanUp();
+    } finally {
+      TestUtils.assertNoUnexpectedRatisExit();
+      logger.info("[RECOVER TEST] end tearing down the test env");
+    }
   }
 
   /* mimics the situation before this patch */

iotdb-core/consensus/src/test/java/org/apache/iotdb/consensus/ratis/TestUtils.java

@@ -40,6 +40,7 @@
 import org.apache.iotdb.consensus.ratis.utils.Utils;
 
 import org.apache.ratis.thirdparty.com.google.common.base.Preconditions;
+import org.apache.ratis.util.ExitUtils;
 import org.apache.ratis.util.FileUtils;
 import org.apache.ratis.util.TimeDuration;
 import org.apache.ratis.util.Timestamp;
@@ -55,9 +56,11 @@
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Objects;
 import java.util.Scanner;
+import java.util.Set;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.ExecutorService;
@@ -70,6 +73,9 @@
 public class TestUtils {
 
   private static final Logger logger = LoggerFactory.getLogger(TestUtils.class);
+  private static final TimeDuration PORT_RELEASE_WAIT = TimeDuration.valueOf(10, TimeUnit.SECONDS);
+  private static final TimeDuration PORT_RELEASE_POLL =
+      TimeDuration.valueOf(100, TimeUnit.MILLISECONDS);
 
   public static class TestDataSet implements DataSet {
 
@@ -230,6 +236,7 @@ static class MiniCluster {
     private final RatisConfig config;
     private final List<RatisConsensus> servers;
     private final ConsensusGroup group;
+    private final List<Integer> peerPorts;
     private Supplier<IStateMachine> smProvider;
     private final AtomicBoolean isStopped = new AtomicBoolean(false);
 
@@ -250,9 +257,10 @@ private MiniCluster(
       this.peerStorage = new ArrayList<>();
       this.stateMachines = new ArrayList<>();
       this.servers = new ArrayList<>();
+      this.peerPorts = randomDistinctPorts(replicas);
 
       for (int i = 0; i < replicas; i++) {
-        peers.add(new Peer(gid, i, new TEndPoint("127.0.0.1", randomFreePort())));
+        peers.add(new Peer(gid, i, new TEndPoint("127.0.0.1", peerPorts.get(i))));
 
         final File storage = storageProvider.apply(i);
         FileUtils.deleteFileQuietly(storage);
@@ -300,6 +308,7 @@ void stop() throws IOException {
       for (RatisConsensus server : servers) {
         server.stop();
       }
+      waitUntilPortsReleased(peerPorts);
       isStopped.set(true);
     }
 
@@ -495,6 +504,65 @@ MiniCluster create() {
     }
   }
 
+  static void prepareJvmForRatisTest() {
+    ExitUtils.disableSystemExit();
+    ExitUtils.clear();
+  }
+
+  static void assertNoUnexpectedRatisExit() {
+    ExitUtils.assertNotTerminated();
+    ExitUtils.clear();
+  }
+
+  private static List<Integer> randomDistinctPorts(int count) {
+    final List<Integer> ports = new ArrayList<>(count);
+    final Set<Integer> uniquePorts = new HashSet<>();
+    while (ports.size() < count) {
+      final int port = randomFreePort();
+      if (uniquePorts.add(port)) {
+        ports.add(port);
+      }
+    }
+    return ports;
+  }
+
+  private static void waitUntilPortsReleased(List<Integer> ports) throws IOException {
+    final Timestamp start = Timestamp.currentTime();
+    while (true) {
+      boolean allReleased = true;
+      for (int port : ports) {
+        if (!isLocalPortAvailable(port)) {
+          allReleased = false;
+          break;
+        }
+      }
+
+      if (allReleased) {
+        return;
+      }
+
+      if (start.elapsedTime().compareTo(PORT_RELEASE_WAIT) > 0) {
+        throw new IOException("Timed out waiting for Ratis test ports to be released: " + ports);
+      }
+
+      try {
+        PORT_RELEASE_POLL.sleep();
+      } catch (InterruptedException e) {
+        Thread.currentThread().interrupt();
+        throw new IOException("Interrupted while waiting for Ratis test ports to be released", e);
+      }
+    }
+  }
+
+  private static boolean isLocalPortAvailable(int port) {
+    try (ServerSocket socket = new ServerSocket(port)) {
+      socket.setReuseAddress(true);
+      return true;
+    } catch (IOException e) {
+      return false;
+    }
+  }
+
   private static int randomFreePort() {
     try (ServerSocket socket = new ServerSocket(0)) {
       return socket.getLocalPort();