[fix](regression-test) Fix regiressin test syncer suit use master fe directly

regression-test/framework/src/main/groovy/org/apache/doris/regression/suite/Suite.groovy

@@ -259,6 +259,28 @@ class Suite implements GroovyInterceptable {
         return result
     }
 
+    def sql_return_maparray(String sqlStr) {
+        logger.info("Execute sql: ${sqlStr}".toString())
+        def (result, meta) = JdbcUtils.executeToList(context.getConnection(), sqlStr)
+
+        // get all column names as list
+        List<String> columnNames = new ArrayList<>()
+        for (int i = 0; i < meta.getColumnCount(); i++) {
+            columnNames.add(meta.getColumnName(i + 1))
+        }
+
+        // add result to res map list, each row is a map with key is column name
+        List<Map<String, Object>> res = new ArrayList<>()
+        for (int i = 0; i < result.size(); i++) {
+            Map<String, Object> row = new HashMap<>()
+            for (int j = 0; j < columnNames.size(); j++) {
+                row.put(columnNames.get(j), result.get(i).get(j))
+            }
+            res.add(row)
+        }
+        return res;
+    }
+
     List<List<Object>> target_sql(String sqlStr, boolean isOrder = false) {
         logger.info("Execute ${isOrder ? "order_" : ""}target_sql: ${sqlStr}".toString())
         def (result, meta) = JdbcUtils.executeToList(context.getTargetConnection(this), sqlStr)

regression-test/framework/src/main/groovy/org/apache/doris/regression/suite/Syncer.groovy

@@ -55,7 +55,7 @@ class Syncer {
 
     Syncer(Suite suite, Config config) {
         this.suite = suite
-        context = new SyncerContext(suite.context.dbName, config)
+        context = new SyncerContext(suite, suite.context.dbName, config)
     }
 
     enum ccrCluster {

regression-test/framework/src/main/groovy/org/apache/doris/regression/suite/SyncerContext.groovy

@@ -23,7 +23,11 @@ import org.apache.doris.regression.suite.client.BackendClientImpl
 import org.apache.doris.regression.suite.client.FrontendClientImpl
 import org.apache.doris.thrift.TTabletCommitInfo
 import org.apache.doris.thrift.TGetSnapshotResult
+import org.apache.doris.thrift.TNetworkAddress;
 import com.google.gson.annotations.SerializedName
+import org.slf4j.Logger
+import org.slf4j.LoggerFactory
+import groovy.util.logging.Slf4j
 
 import java.sql.Connection
 
@@ -93,6 +97,9 @@ class ExtraInfo {
 }
 
 class SyncerContext {
+    final Logger logger = LoggerFactory.getLogger(this.class)
+
+    final Suite suite
     protected Connection targetConnection
     protected FrontendClientImpl sourceFrontendClient
     protected FrontendClientImpl targetFrontendClient
@@ -121,7 +128,8 @@ class SyncerContext {
     public long txnId
     public long seq
 
-    SyncerContext(String dbName, Config config) {
+    SyncerContext(Suite suite, String dbName, Config config) {
+        this.suite = suite
         this.sourceDbId = -1
         this.targetDbId = -1
         this.db = dbName
@@ -139,16 +147,39 @@ class SyncerContext {
         return info
     }
 
+    FrontendClientImpl getMasterFrontClient() {
+        def result = suite.sql_return_maparray "select Host, RpcPort, IsMaster from frontends();"
+        logger.info("get master fe: ${result}")
+
+        def masterHost = ""
+        def masterPort = 0
+        for (def row : result) {
+            if (row.IsMaster == "true") {
+                masterHost = row.Host
+                masterPort = row.RpcPort.toInteger()
+                break
+            }
+        }
+
+        if (masterHost == "" || masterPort == 0) {
+            throw new Exception("can not find master fe")
+        }
+
+        def masterNetworkAddr = new TNetworkAddress(masterHost, masterPort)
+        logger.info("master fe network addr: ${masterNetworkAddr}")
+        return new FrontendClientImpl(masterNetworkAddr)
+    }
+
     FrontendClientImpl getSourceFrontClient() {
         if (sourceFrontendClient == null) {
-            sourceFrontendClient = new FrontendClientImpl(config.feSourceThriftNetworkAddress)
+            sourceFrontendClient = getMasterFrontClient()
         }
         return sourceFrontendClient
     }
 
     FrontendClientImpl getTargetFrontClient() {
         if (targetFrontendClient == null) {
-            targetFrontendClient = new FrontendClientImpl(config.feTargetThriftNetworkAddress)
+            targetFrontendClient = getMasterFrontClient()
         }
         return targetFrontendClient
     }