From c954d0ac7addd1e8f395c8a0d9f006c97a0e2b59 Mon Sep 17 00:00:00 2001
From: xiao-77 <berylbao@taosdata.com>
Date: Mon, 18 Nov 2024 11:20:32 +0800
Subject: [PATCH 1/2] fix:skip begin&end snapshot while wal level = 0.

---
 source/libs/wal/src/walWrite.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/source/libs/wal/src/walWrite.c b/source/libs/wal/src/walWrite.c
index 1a9652b3bb..66ead2fd26 100644
--- a/source/libs/wal/src/walWrite.c
+++ b/source/libs/wal/src/walWrite.c
@@ -376,6 +376,10 @@ static FORCE_INLINE int32_t walCheckAndRoll(SWal *pWal) {
 int32_t walBeginSnapshot(SWal *pWal, int64_t ver, int64_t logRetention) {
   int32_t code = 0;
 
+  if (pWal->cfg.level == TAOS_WAL_SKIP) {
+    TAOS_RETURN(TSDB_CODE_SUCCESS);
+  }
+
   if (logRetention < 0) {
     TAOS_RETURN(TSDB_CODE_FAILED);
   }
@@ -404,6 +408,10 @@ _exit:
 int32_t walEndSnapshot(SWal *pWal) {
   int32_t code = 0, lino = 0;
 
+  if (pWal->cfg.level == TAOS_WAL_SKIP) {
+    TAOS_RETURN(TSDB_CODE_SUCCESS);
+  }
+
   TAOS_UNUSED(taosThreadRwlockWrlock(&pWal->mutex));
   int64_t ver = pWal->vers.verInSnapshotting;
 

From f0c182988cd23c3dc8561559a351b553e0fd6024 Mon Sep 17 00:00:00 2001
From: xiao-77 <berylbao@taosdata.com>
Date: Mon, 18 Nov 2024 13:49:03 +0800
Subject: [PATCH 2/2] Add test case for begin&end snapshot while wal_level =0 .

---
 source/libs/wal/test/walMetaTest.cpp | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/source/libs/wal/test/walMetaTest.cpp b/source/libs/wal/test/walMetaTest.cpp
index 3e6fab116f..a958ad74e0 100644
--- a/source/libs/wal/test/walMetaTest.cpp
+++ b/source/libs/wal/test/walMetaTest.cpp
@@ -510,4 +510,27 @@ TEST_F(WalSkipLevel, restart) {
   TearDown();
 
   SetUp();
+}
+
+TEST_F(WalSkipLevel, roll) {
+  int code;
+  int i;
+  for (i = 0; i < 100; i++) {
+    code = walAppendLog(pWal, i, 0, syncMeta, (void*)ranStr, ranStrLen);
+    ASSERT_EQ(code, 0);
+    code = walCommit(pWal, i);
+  }
+  walBeginSnapshot(pWal, i - 1, 0);
+  walEndSnapshot(pWal);
+  code = walAppendLog(pWal, 5, 0, syncMeta, (void*)ranStr, ranStrLen);
+  ASSERT_NE(code, 0);
+  for (; i < 200; i++) {
+    code = walAppendLog(pWal, i, 0, syncMeta, (void*)ranStr, ranStrLen);
+    ASSERT_EQ(code, 0);
+    code = walCommit(pWal, i);
+  }
+  code = walBeginSnapshot(pWal, i - 1, 0);
+  ASSERT_EQ(code, 0);
+  code = walEndSnapshot(pWal);
+  ASSERT_EQ(code, 0);
 }
\ No newline at end of file