diff --git a/starrocks-stream-load-sdk/src/main/java/com/starrocks/data/load/stream/v2/FlushReason.java b/starrocks-stream-load-sdk/src/main/java/com/starrocks/data/load/stream/v2/FlushReason.java
index 96d2a6d0..100bef2d 100644
--- a/starrocks-stream-load-sdk/src/main/java/com/starrocks/data/load/stream/v2/FlushReason.java
+++ b/starrocks-stream-load-sdk/src/main/java/com/starrocks/data/load/stream/v2/FlushReason.java
@@ -26,10 +26,13 @@
 public enum FlushReason {
     // No need to flush
     NONE,
-    // Should commit the data
+    // Trigger the commit condition, such as flush interval,
+    // and should flush first
     COMMIT,
     // Cache is full, and need flush on or more tables
     CACHE_FULL,
     // The number of buffered rows reaches the limit
-    BUFFER_ROWS_REACH_LIMIT
+    BUFFER_ROWS_REACH_LIMIT,
+    // Force flush, such as StreamLoadManagerV2.flush
+    FORCE
 }
diff --git a/starrocks-stream-load-sdk/src/main/java/com/starrocks/data/load/stream/v2/StreamLoadManagerV2.java b/starrocks-stream-load-sdk/src/main/java/com/starrocks/data/load/stream/v2/StreamLoadManagerV2.java
index 2dd2f982..cc2c13e4 100644
--- a/starrocks-stream-load-sdk/src/main/java/com/starrocks/data/load/stream/v2/StreamLoadManagerV2.java
+++ b/starrocks-stream-load-sdk/src/main/java/com/starrocks/data/load/stream/v2/StreamLoadManagerV2.java
@@ -176,7 +176,7 @@ public void init() {
 
                     if (savepoint) {
                         for (TransactionTableRegion region : flushQ) {
-                            boolean flush = region.flush(FlushReason.COMMIT);
+                            boolean flush = region.flush(FlushReason.FORCE);
                             LOG.debug("Trigger flush table region {} because of savepoint, region cache bytes: {}, flush: {}",
                                     region.getUniqueKey(), region.getCacheBytes(), flush);
                         }
@@ -187,19 +187,20 @@ public void init() {
                             for (TransactionTableRegion region : flushQ) {
                                 // savepoint makes sure no more data is written, so these conditions
                                 // can guarantee commit after all data has been written to StarRocks
-                                if (region.getCacheBytes() == 0 && !region.isFlushing()) {
-                                    boolean success = region.commit();
-                                    if (success) {
-                                        committedRegions += 1;
-                                        region.resetAge();
-                                    }
-                                    LOG.debug("Commit region {} for savepoint, success: {}", region.getUniqueKey(), success);
+                                boolean success = region.commit();
+                                if (success && region.getCacheBytes() == 0) {
+                                    committedRegions += 1;
+                                    region.resetAge();
                                 }
+                                LOG.debug("Commit region {} for savepoint, success: {}", region.getUniqueKey(), success);
                             }
 
                             if (committedRegions == flushQ.size()) {
                                 allRegionsCommitted = true;
                                 LOG.info("All regions committed for savepoint, number of regions: {}", committedRegions);
+                            } else {
+                                LOG.debug("Some regions not committed for savepoint, expected num: {}, actual num: {}",
+                                        flushQ.size(), committedRegions);
                             }
                         }
                         LockSupport.unpark(current);
diff --git a/starrocks-stream-load-sdk/src/main/java/com/starrocks/data/load/stream/v2/TransactionTableRegion.java b/starrocks-stream-load-sdk/src/main/java/com/starrocks/data/load/stream/v2/TransactionTableRegion.java
index 26bfb457..c1f410c4 100644
--- a/starrocks-stream-load-sdk/src/main/java/com/starrocks/data/load/stream/v2/TransactionTableRegion.java
+++ b/starrocks-stream-load-sdk/src/main/java/com/starrocks/data/load/stream/v2/TransactionTableRegion.java
@@ -219,11 +219,11 @@ public FlushReason shouldFlush() {
     }
 
     public boolean flush(FlushReason reason) {
+        LOG.debug("Try to flush db: {}, table: {}, label: {}, cacheBytes: {}, cacheRows: {}, reason: {}",
+                database, table, label, cacheBytes, cacheRows, reason);
         if (state.compareAndSet(State.ACTIVE, State.FLUSHING)) {
             for (;;) {
                 if (ctl.compareAndSet(false, true)) {
-                    LOG.info("Flush uniqueKey : {}, label : {}, bytes : {}, rows: {}, reason: {}",
-                            uniqueKey, label, cacheBytes.get(), cacheRows.get(), reason);
                     if (reason != FlushReason.BUFFER_ROWS_REACH_LIMIT ||
                             activeChunk.numRows() >= properties.getMaxBufferRows()) {
                         switchChunk();
@@ -233,6 +233,8 @@ public boolean flush(FlushReason reason) {
                 }
             }
             if (!inactiveChunks.isEmpty()) {
+                LOG.info("Flush db: {}, table: {}, label: {}, cacheBytes: {}, cacheRows: {}, reason: {}",
+                        database, table, label, cacheBytes.get(), cacheRows.get(), reason);
                 streamLoad(0);
                 return true;
             } else {
@@ -251,6 +253,7 @@ public boolean flush(FlushReason reason) {
     //    indicates the commit should not be triggered, such as it is FLUSHING,
     //    or it's still doing commit asynchronously
     public boolean commit() {
+        LOG.debug("Try to commit, db: {}, table: {}, label: {}", database, table, label);
         boolean commitTriggered = false;
         if (!state.compareAndSet(State.ACTIVE, State.COMMITTING)) {
             if (state.get() != State.COMMITTING) {
@@ -263,6 +266,7 @@ public boolean commit() {
             // label will be set to null after commit executes successfully
             if (label == null) {
                 state.compareAndSet(State.COMMITTING, State.ACTIVE);
+                LOG.debug("Success to commit, db: {}, table: {}", database, table);
                 return true;
             } else {
                 // wait for the commit to finish
@@ -271,10 +275,14 @@ public boolean commit() {
         }
 
         if (label == null) {
-            // if the data has never been flushed (label == null), the commit should fail so that StreamLoadManagerV2#init
-            // will schedule to flush the data first, and then trigger commit again
+            // if the data has never been flushed (label == null), the commit should fail
+            // so that StreamLoadManagerV2#init will schedule to flush the data first, and
+            // then trigger commit again
             boolean commitSuccess = cacheBytes.get() == 0;
             state.compareAndSet(State.COMMITTING, State.ACTIVE);
+            if (commitSuccess) {
+                LOG.debug("Success to commit, db: {}, table: {}", database, table);
+            }
             return commitSuccess;
         }
 
@@ -345,14 +353,15 @@ public void complete(StreamLoadResponse response) {
         numRetries = 0;
         firstException = null;
 
-        LOG.info("Stream load flushed, db: {}, table: {}, label : {}", database, table, label);
         if (!inactiveChunks.isEmpty()) {
-            LOG.info("Stream load continue, db: {}, table: {}, label : {}", database, table, label);
+            LOG.info("Stream load continue, db: {}, table: {}, label: {}, cacheBytes: {}, cacheRows: {}",
+                    database, table, label, cacheBytes, cacheRows);
             streamLoad(0);
             return;
         }
         if (state.compareAndSet(State.FLUSHING, State.ACTIVE)) {
-            LOG.info("Stream load completed, db: {}, table: {}, label : {}", database, table, label);
+            LOG.info("Stream load completed, db: {}, table: {}, label: {}, cacheBytes: {}, cacheRows: {}",
+                    database, table, label, cacheBytes, cacheRows);
         }
     }