diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/asyncprofiler/AsyncProfilerTask.java b/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/asyncprofiler/AsyncProfilerTask.java
index 6e67d7be58..819b25f998 100644
--- a/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/asyncprofiler/AsyncProfilerTask.java
+++ b/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/asyncprofiler/AsyncProfilerTask.java
@@ -58,8 +58,7 @@ public class AsyncProfilerTask {
     private static String execute(AsyncProfiler asyncProfiler, String args)
             throws IllegalArgumentException, IOException {
         LOGGER.info("async profiler execute args:{}", args);
-        String result = asyncProfiler.execute(args);
-        return result.trim();
+        return asyncProfiler.execute(args);
     }
 
     /**
diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/asyncprofiler/AsyncProfilerTaskExecutionService.java b/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/asyncprofiler/AsyncProfilerTaskExecutionService.java
index 18ed922443..da0d350e21 100644
--- a/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/asyncprofiler/AsyncProfilerTaskExecutionService.java
+++ b/apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/asyncprofiler/AsyncProfilerTaskExecutionService.java
@@ -43,7 +43,7 @@ public class AsyncProfilerTaskExecutionService implements BootService {
 
     private static final AsyncProfiler ASYNC_PROFILER = AsyncProfiler.getInstance();
 
-    private static final String SUCCESS_RESULT = "Profiling started";
+    private static final String SUCCESS_RESULT = "Profiling started\n";
 
     // profile executor thread pool, only running one thread
     private static final ScheduledExecutorService ASYNC_PROFILER_EXECUTOR = Executors.newSingleThreadScheduledExecutor(
@@ -133,8 +133,10 @@ public void onComplete() throws Throwable {
 
     @Override
     public void shutdown() throws Throwable {
-        scheduledFuture.cancel(true);
         ASYNC_PROFILER_EXECUTOR.shutdown();
-        scheduledFuture = null;
+        if (Objects.nonNull(scheduledFuture)) {
+            scheduledFuture.cancel(true);
+            scheduledFuture = null;
+        }
     }
 }