enh: logging sync log buffer rollback events

source/libs/sync/inc/syncPipeline.h

@@ -107,7 +107,7 @@ int32_t syncLogBufferReset(SSyncLogBuffer* pBuf, SSyncNode* pNode);
 // private
 SSyncRaftEntry* syncLogBufferGetOneEntry(SSyncLogBuffer* pBuf, SSyncNode* pNode, SyncIndex index, bool* pInBuf);
 int32_t         syncLogBufferValidate(SSyncLogBuffer* pBuf);
-int32_t         syncLogBufferRollback(SSyncLogBuffer* pBuf, SyncIndex toIndex);
+int32_t         syncLogBufferRollback(SSyncLogBuffer* pBuf, SSyncNode* pNode, SyncIndex toIndex);
 
 #ifdef __cplusplus
 }

source/libs/sync/src/syncPipeline.c

@@ -310,7 +310,7 @@ int32_t syncLogBufferAccept(SSyncLogBuffer* pBuf, SSyncNode* pNode, SSyncRaftEnt
     ASSERT(pEntry->index == pExist->index);
 
     if (pEntry->term != pExist->term) {
-      (void)syncLogBufferRollback(pBuf, index);
+      (void)syncLogBufferRollback(pBuf, pNode, index);
     } else {
       sTrace("vgId:%d, duplicate log entry received. index: %" PRId64 ", term: %" PRId64 ". log buffer: [%" PRId64
              " %" PRId64 " %" PRId64 ", %" PRId64 ")",
@@ -971,14 +971,18 @@ void syncLogBufferDestroy(SSyncLogBuffer* pBuf) {
   return;
 }
 
-int32_t syncLogBufferRollback(SSyncLogBuffer* pBuf, SyncIndex toIndex) {
+int32_t syncLogBufferRollback(SSyncLogBuffer* pBuf, SSyncNode* pNode, SyncIndex toIndex) {
   ASSERT(pBuf->commitIndex < toIndex && toIndex <= pBuf->endIndex);
 
+  sInfo("vgId:%d, rollback sync log buffer. toindex: %" PRId64 ", buffer: [%" PRId64 " %" PRId64 " %" PRId64
+        ", %" PRId64 ")",
+        pNode->vgId, toIndex, pBuf->startIndex, pBuf->commitIndex, pBuf->matchIndex, pBuf->endIndex);
+
   SyncIndex index = pBuf->endIndex - 1;
   while (index >= toIndex) {
     SSyncRaftEntry* pEntry = pBuf->entries[index % pBuf->size].pItem;
     if (pEntry != NULL) {
-      syncEntryDestroy(pEntry);
+      (void)syncEntryDestroy(pEntry);
       pEntry = NULL;
       memset(&pBuf->entries[index % pBuf->size], 0, sizeof(pBuf->entries[0]));
     }
@@ -996,7 +1000,7 @@ int32_t syncLogBufferReset(SSyncLogBuffer* pBuf, SSyncNode* pNode) {
   ASSERT(lastVer == pBuf->matchIndex);
   SyncIndex index = pBuf->endIndex - 1;
 
-  (void)syncLogBufferRollback(pBuf, pBuf->matchIndex + 1);
+  (void)syncLogBufferRollback(pBuf, pNode, pBuf->matchIndex + 1);
 
   sInfo("vgId:%d, reset sync log buffer. buffer: [%" PRId64 " %" PRId64 " %" PRId64 ", %" PRId64 ")", pNode->vgId,
         pBuf->startIndex, pBuf->commitIndex, pBuf->matchIndex, pBuf->endIndex);