kaisun2000 commented on a change in pull request #1452:
URL: https://github.com/apache/helix/pull/1452#discussion_r502014661
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File path: helix-core/src/test/java/org/apache/helix/ThreadLeakageChecker.java
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@@ -0,0 +1,181 @@
+package org.apache.helix;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+
+import org.apache.helix.common.ZkTestBase;
+
+
+public class ThreadLeakageChecker {
+ private static ThreadGroup getRootThreadGroup() {
+ ThreadGroup candidate = Thread.currentThread().getThreadGroup();
+ while (candidate.getParent() != null) {
+ candidate = candidate.getParent();
+ }
+ return candidate;
+ }
+
+ private static List<Thread> getAllThreads() {
+ ThreadGroup rootThreadGroup = getRootThreadGroup();
+ Thread[] threads = new Thread[32];
Review comment:
It does not matter. Note in line 30 ` threads = new
Thread[threads.length * 2];`, we double the threads array if they are not large
enough, exponentially.
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