From 4782fd6270a02aa5fca213ea99c60d858ab34fa2 Mon Sep 17 00:00:00 2001
From: hengyunabc <hengyunabc@gmail.com>
Date: Tue, 6 Apr 2021 15:34:55 +0800
Subject: [PATCH] fix thread -n -1. #1755

---
 .../arthas/core/command/monitor200/ThreadCommand.java    | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/core/src/main/java/com/taobao/arthas/core/command/monitor200/ThreadCommand.java b/core/src/main/java/com/taobao/arthas/core/command/monitor200/ThreadCommand.java
index 04c66fbf5..63e975174 100755
--- a/core/src/main/java/com/taobao/arthas/core/command/monitor200/ThreadCommand.java
+++ b/core/src/main/java/com/taobao/arthas/core/command/monitor200/ThreadCommand.java
@@ -188,7 +188,14 @@ public class ThreadCommand extends AnnotatedCommand {
         List<ThreadVO> threadStats = threadSampler.sample(ThreadUtil.getThreads());
 
         int limit = Math.min(threadStats.size(), topNBusy);
-        List<ThreadVO> topNThreads = threadStats.subList(0, limit);
+
+        List<ThreadVO> topNThreads = null;
+        if (limit > 0) {
+            topNThreads = threadStats.subList(0, limit);
+        } else { // -1 for all threads
+            topNThreads = threadStats;
+        }
+
         List<Long> tids = new ArrayList<Long>(topNThreads.size());
         for (ThreadVO thread : topNThreads) {
             if (thread.getId() > 0) {