remove profiler collect action. fix loop NullPointerException #2961

core/src/main/java/com/taobao/arthas/core/command/monitor200/ProfilerCommand.java

@@ -38,7 +38,7 @@ import one.profiler.AsyncProfiler;
 import one.profiler.Counter;
 
 /**
- * 
+ * https://github.com/async-profiler/async-profiler/blob/master/docs/ProfilerOptions.md 具体参数说明，以及哪些参数可以传递给 async-profiler agent
  * @author hengyunabc 2019-10-31
  *
  */
@@ -524,18 +524,12 @@ public class ProfilerCommand extends AnnotatedCommand {
     @Description("run profiler in a loop (continuous profiling)")
     public void setLoop(String loop) {
         this.loop = loop;
-        if (this.action.equals("collect")) {
-            this.action = "start";
-        }
     }
 
     @Option(longName = "timeout")
     @Description("automatically stop profiler at TIME (absolute or relative)")
     public void setTimeout(String timeout) {
         this.timeout = timeout;
-        if (this.action.equals("collect")) {
-            this.action = "start";
-        }
     }
 
 
@@ -581,11 +575,11 @@ public class ProfilerCommand extends AnnotatedCommand {
     }
 
     /**
-     * https://github.com/async-profiler/async-profiler/blob/v2.9/profiler.sh#L154
+     * https://github.com/async-profiler/async-profiler/blob/v3.0/src/arguments.cpp#L131
      */
     public enum ProfilerAction {
-        // start, resume, stop, dump, check, status, meminfo, list, collect,
-        start, resume, stop, dump, check, status, meminfo, list, collect,
+        // start, resume, stop, dump, check, status, meminfo, list,
+        start, resume, stop, dump, check, status, meminfo, list,
         version,
 
         load,
@@ -747,13 +741,16 @@ public class ProfilerCommand extends AnnotatedCommand {
                 }
                 String result = execute(asyncProfiler, this.actionArg);
                 appendExecuteResult(process, result);
-            } else if (ProfilerAction.collect.equals(profilerAction)) {
-                String executeArgs = executeArgs(ProfilerAction.collect);
+            } else if (ProfilerAction.start.equals(profilerAction)) {
+                if (this.duration == null) {
+                    String executeArgs = executeArgs(ProfilerAction.start);
                     String result = execute(asyncProfiler, executeArgs);
-                ProfilerModel profilerModel = createProfilerModel(result);
-
-                if (this.duration != null) {
+                    appendExecuteResult(process, result);
+                } else { // 设置延时执行 stop
                     final String outputFile = outputFile();
+                    String executeArgs = executeArgs(ProfilerAction.start);
+                    String result = execute(asyncProfiler, executeArgs);
+                    ProfilerModel profilerModel = createProfilerModel(result);
                     profilerModel.setOutputFile(outputFile);
                     profilerModel.setDuration(duration);
 
@@ -761,7 +758,7 @@ public class ProfilerCommand extends AnnotatedCommand {
                     ArthasBootstrap.getInstance().getScheduledExecutorService().schedule(new Runnable() {
                         @Override
                         public void run() {
-                            //在异步线程执行，profiler命令已经结束，不能输出到客户端
+                            // 在异步线程执行，profiler命令已经结束，不能输出到客户端
                             try {
                                 logger.info("stopping profiler ...");
                                 ProfilerModel model = processStop(asyncProfiler, ProfilerAction.stop);
@@ -772,12 +769,9 @@ public class ProfilerCommand extends AnnotatedCommand {
                             }
                         }
                     }, this.duration, TimeUnit.SECONDS);
-                }
                     process.appendResult(profilerModel);
-            } else if (ProfilerAction.start.equals(profilerAction)) {
-                String executeArgs = executeArgs(ProfilerAction.start);
-                String result = execute(asyncProfiler, executeArgs);
-                appendExecuteResult(process, result);
+                }
+
             } else if (ProfilerAction.stop.equals(profilerAction)) {
                 ProfilerModel profilerModel = processStop(asyncProfiler, profilerAction);
                 process.appendResult(profilerModel);

site/docs/doc/profiler.md

@@ -228,10 +228,10 @@ profiler stop --include 'java/*' --include 'com/demo/*' --exclude '*Unsafe.park*
 
 ## 指定执行时间
 
-比如，希望 profiler 执行 300 秒自动结束，可以用 `-d`/`--duration` 参数为 collect action 指定时间：
+比如，希望 profiler 执行 300 秒自动结束，可以用 `-d`/`--duration` 参数为 start action 指定时间：
 
 ```bash
-profiler collect --duration 300
+profiler start --duration 300
 ```
 
 ## 生成 jfr 格式结果
@@ -383,7 +383,7 @@ profiler start --loop 1h -f /var/log/profile-%t.jfr
 
 ## `--timeout` 选项
 
-这个选项指定 profiling 自动在多久后停止。该选项和 `--loop` 选项的格式一致，可以是时间点，也可以是一个时间间隔。这两个选项都是用于 `start` action 而不是 `collect` action 的。可参考 [async-profiler Github Discussions](https://github.com/async-profiler/async-profiler/discussions/789) 了解更多信息。
+这个选项指定 profiling 自动在多久后停止。该选项和 `--loop` 选项的格式一致，可以是时间点，也可以是一个时间间隔。这两个选项都是用于 `start` action。可参考 [async-profiler docs](https://github.com/async-profiler/async-profiler/blob/master/docs/ProfilerOptions.md) 了解更多信息。
 
 ## `--wall` 选项
 

site/docs/en/doc/profiler.md

@@ -228,10 +228,10 @@ profiler stop --include'java/*' --include 'com/demo/*' --exclude'*Unsafe.park*'
 
 ## Specify execution time
 
-For example, if you want the profiler to automatically end after 300 seconds, you can specify it with the `-d`/`--duration` parameter in collect action:
+For example, if you want the profiler to automatically end after 300 seconds, you can specify it with the `-d`/`--duration` parameter in start action:
 
 ```bash
-profiler collect --duration 300
+profiler start --duration 300
 ```
 
 ## Generate jfr format result
@@ -387,7 +387,7 @@ profiler start --loop 1h -f /var/log/profile-%t.jfr
 
 This option specifies the time when profiling will automatically stop. The format is the same as in loop: it is either a wall clock time (12:34:56) or a relative time interval (2h).
 
-Both `--loop` and `--timeout` are used for `start` action but not for `collect` action, for further information refer to [async-profiler Github Discussions](https://github.com/async-profiler/async-profiler/discussions/789).
+Both `--loop` and `--timeout` are used for `start` action, for further information refer to [async-profiler docs](https://github.com/async-profiler/async-profiler/blob/master/docs/ProfilerOptions.md).
 
 ## `--wall` option