Improve ThreadGrouper by pool regex

2 files changed, 5 insertions, 2 deletions

diff --git a/spark-common/src/main/java/me/lucko/spark/sampler/ThreadGrouper.java b/spark-common/src/main/java/me/lucko/spark/sampler/ThreadGrouper.java
index 72cd4dc..031d7c1 100644
--- a/spark-common/src/main/java/me/lucko/spark/sampler/ThreadGrouper.java
+++ b/spark-common/src/main/java/me/lucko/spark/sampler/ThreadGrouper.java
@@ -45,9 +45,12 @@ public interface ThreadGrouper {
     /**
      * Implementation of {@link ThreadGrouper} that attempts to group by the name of the pool
      * the thread originated from.
+     *
+     * <p>The regex pattern used to match pools expects a digit at the end of the thread name,
+     * separated from the pool name with any of one or more of ' ', '-', or '#'.</p>
      */
     ThreadGrouper BY_POOL = new ThreadGrouper() {
-        private final Pattern pattern = Pattern.compile("^(.*)[-#] ?\\d+$");
+        private final Pattern pattern = Pattern.compile("^(.*?)[-# ]+\\d+$");
 
         @Override
         public String getGroup(String threadName) {
diff --git a/spark-common/src/main/java/me/lucko/spark/util/ThreadFinder.java b/spark-common/src/main/java/me/lucko/spark/util/ThreadFinder.java
index a74f85a..8ba7b10 100644
--- a/spark-common/src/main/java/me/lucko/spark/util/ThreadFinder.java
+++ b/spark-common/src/main/java/me/lucko/spark/util/ThreadFinder.java
@@ -51,7 +51,7 @@ public final class ThreadFinder {
      */
     public Stream<Thread> getThreads() {
         Thread[] threads = new Thread[this.approxActiveCount + 20]; // +20 to allow a bit of growth for newly created threads
-        while (ROOT_THREAD_GROUP.enumerate(threads, true ) == threads.length) {
+        while (ROOT_THREAD_GROUP.enumerate(threads, true) == threads.length) {
             threads = new Thread[threads.length * 2];
         }
         return Arrays.stream(threads).filter(Objects::nonNull);