From b41df4a5bd1babfa9f8c568b97b2a30a1e4abd08 Mon Sep 17 00:00:00 2001
From: hengyunabc <hengyunabc@gmail.com>
Date: Tue, 6 Aug 2019 16:45:51 +0800
Subject: [PATCH] check if JavaCompiler is avaliable. #799

---
 .../java/com/taobao/arthas/compiler/DynamicCompiler.java     | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/memorycompiler/src/main/java/com/taobao/arthas/compiler/DynamicCompiler.java b/memorycompiler/src/main/java/com/taobao/arthas/compiler/DynamicCompiler.java
index 61c9b012b..586100695 100644
--- a/memorycompiler/src/main/java/com/taobao/arthas/compiler/DynamicCompiler.java
+++ b/memorycompiler/src/main/java/com/taobao/arthas/compiler/DynamicCompiler.java
@@ -25,6 +25,11 @@ public class DynamicCompiler {
     private final List<Diagnostic<? extends JavaFileObject>> warnings = new ArrayList<Diagnostic<? extends JavaFileObject>>();
 
     public DynamicCompiler(ClassLoader classLoader) {
+        if (javaCompiler == null) {
+            throw new IllegalStateException(
+                            "Can not load JavaCompiler from javax.tools.ToolProvider#getSystemJavaCompiler(),"
+                                            + " please confirm the application running in JDK not JRE.");
+        }
         standardFileManager = javaCompiler.getStandardFileManager(null, null, null);
 
         options.add("-Xlint:unchecked");