fixed unused error

example/src/main/java/com/alibaba/otter/canal/example/SimpleCanalClientTest.java

@@ -24,8 +24,8 @@ public class SimpleCanalClientTest extends AbstractCanalClientTest {
         String ip = AddressUtils.getHostIp();
         CanalConnector connector = CanalConnectors.newSingleConnector(new InetSocketAddress(ip, 11111),
             destination,
-            "",
-            "");
+            "canal",
+            "canal");
 
         final SimpleCanalClientTest clientTest = new SimpleCanalClientTest(destination);
         clientTest.setConnector(connector);

parse/src/main/java/com/alibaba/otter/canal/parse/inbound/mysql/MysqlConnection.java

@@ -521,13 +521,14 @@ public class MysqlConnection implements ErosaConnection {
         try {
             rs = query("select @@global.binlog_checksum");
             List<String> columnValues = rs.getFieldValues();
-            if (columnValues != null && columnValues.size() >= 1 && columnValues.get(0) != null && columnValues.get(0).toUpperCase().equals("CRC32")) {
+            if (columnValues != null && columnValues.size() >= 1 && columnValues.get(0) != null
+                && columnValues.get(0).toUpperCase().equals("CRC32")) {
                 binlogChecksum = LogEvent.BINLOG_CHECKSUM_ALG_CRC32;
             } else {
                 binlogChecksum = LogEvent.BINLOG_CHECKSUM_ALG_OFF;
             }
         } catch (Throwable e) {
-            logger.error("", e);
+            // logger.error("", e);
             binlogChecksum = LogEvent.BINLOG_CHECKSUM_ALG_OFF;
         }
     }