[fix] restart the arb server will core after upgrading from 4.1

unittest/logservice/CMakeLists.txt

@@ -43,4 +43,5 @@ ob_unittest(test_log_external_storage_io_task)
 if(OB_BUILD_CLOSE_MODULES)
   ob_unittest(test_arb_gc_utils)
   ob_unittest(test_ob_arbitration_service)
+  ob_unittest(test_palf_env_lite_mgr)
 endif()

unittest/logservice/test_palf_env_lite_mgr.cpp

@@ -0,0 +1,76 @@
+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#include <gtest/gtest.h>
+#define private public
+#include "logservice/arbserver/palf_env_lite_mgr.h"
+#undef private
+
+namespace oceanbase
+{
+using namespace common;
+using namespace arbserver;
+using namespace palflite;
+
+namespace unittest
+{
+TEST(TestPalfEnvLiteMgr, test_load_cluster_placeholder)
+{
+  PalfEnvLiteMgr mgr;
+  EXPECT_EQ(OB_SUCCESS, mgr.cluster_meta_info_map_.create(10, "PalfEnvLiteMgr"));
+  const char *base_dir = "base_dir";
+  {
+    const char *str = "cluster_1_clustername_test";
+    ClusterMetaInfo meta_info;
+    EXPECT_EQ(OB_SUCCESS, mgr.load_cluster_placeholder_(str, base_dir));
+    EXPECT_EQ(OB_SUCCESS, mgr.get_cluster_meta_info_(1, meta_info));
+    EXPECT_EQ(0, strcmp(meta_info.cluster_name_, "test"));
+  }
+  {
+    const char *str = "cluster_2_clustername__";
+    ClusterMetaInfo meta_info;
+    EXPECT_EQ(OB_SUCCESS, mgr.load_cluster_placeholder_(str, base_dir));
+    EXPECT_EQ(OB_SUCCESS, mgr.get_cluster_meta_info_(2, meta_info));
+    EXPECT_EQ(0, strcmp(meta_info.cluster_name_, "_"));
+  }
+  {
+    const char *str = "cluster_3_clustername_";
+    ClusterMetaInfo meta_info;
+    EXPECT_EQ(OB_SUCCESS, mgr.load_cluster_placeholder_(str, base_dir));
+    EXPECT_EQ(OB_SUCCESS, mgr.get_cluster_meta_info_(3, meta_info));
+    EXPECT_EQ(0, strcmp(meta_info.cluster_name_, ""));
+  }
+  {
+    const char *str = "cluster_4_clustername__";
+    ClusterMetaInfo meta_info;
+    EXPECT_EQ(OB_SUCCESS, mgr.load_cluster_placeholder_(str, base_dir));
+    EXPECT_EQ(OB_SUCCESS, mgr.get_cluster_meta_info_(4, meta_info));
+    EXPECT_EQ(0, strcmp(meta_info.cluster_name_, "_"));
+  }
+  {
+    const char *str = "cluster_a_clustername_";
+    ClusterMetaInfo meta_info;
+    EXPECT_EQ(OB_ERR_UNEXPECTED, mgr.load_cluster_placeholder_(str, base_dir));
+  }
+}
+
+} // end of unittest
+} // end of oceanbase
+
+int main(int argc, char **argv)
+{
+  OB_LOGGER.set_file_name("test_palf_env_lite_mgr.log", true);
+  OB_LOGGER.set_log_level("INFO");
+  PALF_LOG(INFO, "begin unittest::test_palf_env_lite_mgr");
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}