Ensure Error caught in InitExecutor and do not exit when error occurs in LogBase (#613)

to avoid affecting normal logic of users

Signed-off-by: Eric Zhao <sczyh16@gmail.com>

sentinel-core/src/main/java/com/alibaba/csp/sentinel/init/InitExecutor.java

@@ -50,16 +50,15 @@ public final class InitExecutor {
             }
             for (OrderWrapper w : initList) {
                 w.func.init();
-                RecordLog.info(String.format("[InitExecutor] Initialized: %s with order %d",
+                RecordLog.info(String.format("[InitExecutor] Executing %s with order %d",
                     w.func.getClass().getCanonicalName(), w.order));
             }
         } catch (Exception ex) {
-            RecordLog.warn("[InitExecutor] Init failed", ex);
+            RecordLog.warn("[InitExecutor] WARN: Initialization failed", ex);
             ex.printStackTrace();
         } catch (Error error) {
-            RecordLog.warn("[InitExecutor] Init failed with fatal error", error);
+            RecordLog.warn("[InitExecutor] ERROR: Initialization failed with fatal error", error);
             error.printStackTrace();
-            throw error;
         }
     }
 

sentinel-core/src/main/java/com/alibaba/csp/sentinel/log/LogBase.java

@@ -32,11 +32,15 @@ import com.alibaba.csp.sentinel.util.PidUtil;
  * @author leyou
  */
 public class LogBase {
+
     public static final String LOG_CHARSET = "utf-8";
+
     private static final String DIR_NAME = "logs" + File.separator + "csp";
     private static final String USER_HOME = "user.home";
+
     public static final String LOG_DIR = "csp.sentinel.log.dir";
     public static final String LOG_NAME_USE_PID = "csp.sentinel.log.use.pid";
+
     private static boolean logNameUsePid = false;
 
     private static String logBaseDir;
@@ -45,8 +49,8 @@ public class LogBase {
         try {
             init();
         } catch (Throwable t) {
+            System.err.println("[LogBase] FATAL ERROR when initializing log class");
             t.printStackTrace();
-            System.exit(-1);
         }
     }