[Improvement][worker]优化源文件不存在，则软链接创建失败 (#599)

* [Improvement][service] Remove fixed component versions

* [Improvement][api]优化ALERTMANAGER安装

* [Bug][service] HADOOP_HOME变量失效

* Revert "[Improvement][api]优化ALERTMANAGER安装"

This reverts commit 3e9a13e.

* 恢复代码

* [Improvement][api]优化alertmanager安装过程

* [Improvement][worker]Fix-源文件不存在，则软链接创建失败

* no message

datasophon-worker/src/main/java/com/datasophon/worker/strategy/resource/LinkStrategy.java

@@ -26,11 +26,15 @@ public void exec() {
         String realTarget = basePath + Constants.SLASH + target;
         File sourceFile = new File(source);
         File targetFile = new File(realTarget);
-        if (!targetFile.exists() && sourceFile.exists()) {
-            // 先创建文件夹
-            FileUtil.mkdir(targetFile.getParent());
-            ShellUtils.exceShell("ln -s " + source + " " + realTarget);
-            log.info("Create symbolic dir: {} to {}", source, realTarget);
+        FileUtil.mkdir(targetFile.getParent());
+        ShellUtils.exceShell("ln -s " + source + " " + realTarget);
+
+        if (!targetFile.exists()) {
+            if (sourceFile.exists()) {
+                log.info("Create existing symbolic dir:  {} to {}", source, realTarget);
+            } else {
+                log.warn("Create non-existent symbolic dir: {} to {}", source, realTarget);
+            }
         }
     }
-}
+}