[hotfix][cdc-base] Fix typo 'currenFetcher' -> 'currentFetcher' (#1299)

This closes #1299.

flink-cdc-base/src/main/java/com/ververica/cdc/connectors/base/source/reader/JdbcSourceSplitReader.java

@@ -50,7 +50,7 @@ public class JdbcSourceSplitReader implements SplitReader<SourceRecord, SourceSp
     private final Queue<SourceSplitBase> splits;
     private final int subtaskId;
 
-    @Nullable private Fetcher<SourceRecord, SourceSplitBase> currenFetcher;
+    @Nullable private Fetcher<SourceRecord, SourceSplitBase> currentFetcher;
     @Nullable private String currentSplitId;
     private final JdbcDataSourceDialect dataSourceDialect;
 
@@ -65,7 +65,7 @@ public class JdbcSourceSplitReader implements SplitReader<SourceRecord, SourceSp
         checkSplitOrStartNext();
         Iterator<SourceRecord> dataIt = null;
         try {
-            dataIt = currenFetcher.pollSplitRecords();
+            dataIt = currentFetcher.pollSplitRecords();
         } catch (InterruptedException e) {
             LOG.warn("fetch data failed.", e);
             throw new IOException(e);
@@ -93,16 +93,16 @@ public class JdbcSourceSplitReader implements SplitReader<SourceRecord, SourceSp
 
     @Override
     public void close() throws Exception {
-        if (currenFetcher != null) {
-            LOG.info("Close current fetcher {}", currenFetcher.getClass().getCanonicalName());
-            currenFetcher.close();
+        if (currentFetcher != null) {
+            LOG.info("Close current fetcher {}", currentFetcher.getClass().getCanonicalName());
+            currentFetcher.close();
             currentSplitId = null;
         }
     }
 
     protected void checkSplitOrStartNext() throws IOException {
         // the binlog fetcher should keep alive
-        if (currenFetcher instanceof JdbcSourceStreamFetcher) {
+        if (currentFetcher instanceof JdbcSourceStreamFetcher) {
             return;
         }
 
@@ -114,28 +114,28 @@ public class JdbcSourceSplitReader implements SplitReader<SourceRecord, SourceSp
             currentSplitId = nextSplit.splitId();
 
             if (nextSplit.isSnapshotSplit()) {
-                if (currenFetcher == null) {
+                if (currentFetcher == null) {
                     final JdbcSourceFetchTaskContext taskContext =
                             dataSourceDialect.createFetchTaskContext(nextSplit);
-                    currenFetcher = new JdbcSourceScanFetcher(taskContext, subtaskId);
+                    currentFetcher = new JdbcSourceScanFetcher(taskContext, subtaskId);
                 }
             } else {
                 // point from snapshot split to binlog split
-                if (currenFetcher != null) {
+                if (currentFetcher != null) {
                     LOG.info("It's turn to read binlog split, close current snapshot fetcher.");
-                    currenFetcher.close();
+                    currentFetcher.close();
                 }
                 final JdbcSourceFetchTaskContext taskContext =
                         dataSourceDialect.createFetchTaskContext(nextSplit);
-                currenFetcher = new JdbcSourceStreamFetcher(taskContext, subtaskId);
+                currentFetcher = new JdbcSourceStreamFetcher(taskContext, subtaskId);
                 LOG.info("Stream fetcher is created.");
             }
-            currenFetcher.submitTask(dataSourceDialect.createFetchTask(nextSplit));
+            currentFetcher.submitTask(dataSourceDialect.createFetchTask(nextSplit));
         }
     }
 
     private boolean canAssignNextSplit() {
-        return currenFetcher == null || currenFetcher.isFinished();
+        return currentFetcher == null || currentFetcher.isFinished();
     }
 
     private ChangeEventRecords finishedSnapshotSplit() {