【bugfix】 修复主机重启场景，两阶段事务卡住的情况

src/gausskernel/ddes/adapter/ss_transaction.cpp

@@ -1019,6 +1019,10 @@ bool SSCanFetchLocalSnapshotTxnRelatedInfo()
         return false;
     }
 
+    if (SS_IN_REFORM && t_thrd.role == STARTUP) {
+        return true;
+    }
+
     if (SS_NORMAL_PRIMARY) {
         return true;
     } else if (SS_PERFORMING_SWITCHOVER) {
@@ -1033,8 +1037,6 @@ bool SSCanFetchLocalSnapshotTxnRelatedInfo()
         bool snap_available = xmin_info->snapshot_available;
         SpinLockRelease(&xmin_info->snapshot_available_lock);
         return snap_available;
-    } else if (SS_STANDBY_FAILOVER && t_thrd.role == STARTUP) {
-        return true;
     }
     
     return false;

src/gausskernel/storage/access/transam/twophase.cpp

@@ -3121,6 +3121,9 @@ TransactionId PrescanPreparedTransactions(TransactionId **xids_p, int *nxids_p)
             char *buf = NULL;
             GlobalTransaction gxact = currentStatePtr->prepXacts[i];
 
+            if (!gxact->inredo && SS_PERFORMING_SWITCHOVER) {
+                continue;
+            }
             Assert(gxact->inredo);
 
             xid = gxact->xid;
@@ -3238,6 +3241,10 @@ void RecoverPreparedTransactions(void)
             TransactionId xid;
             char *buf = NULL;
             GlobalTransaction gxact = currentStatePtr->prepXacts[i];
+
+            if (!gxact->inredo && SS_PERFORMING_SWITCHOVER) {
+                continue;
+            }
             char *bufptr = NULL;
             TwoPhaseFileHeader *hdr = NULL;
             TransactionId *subxids = NULL;
@@ -3698,7 +3705,7 @@ void PrepareRedoAdd(char *buf, XLogRecPtr start_lsn, XLogRecPtr end_lsn)
 
     /* unfortunately we can't check if the lock is held exclusively */
     Assert(LWLockHeldByMe(TwoPhaseStateMappingPartitionLock(hdr->xid)));
-    Assert(RecoveryInProgress());
+    Assert(RecoveryInProgress() || SS_PERFORMING_SWITCHOVER);
 
     gid = hdr->gid;
 
@@ -3708,6 +3715,9 @@ void PrepareRedoAdd(char *buf, XLogRecPtr start_lsn, XLogRecPtr end_lsn)
         gxact = currentStatePtr->prepXacts[i];
 
         if (gxact->xid == hdr->xid) {
+            if (!gxact->inredo && SS_PERFORMING_SWITCHOVER) {
+                return;
+            }
             Assert(gxact->inredo);
             ereport(LOG, (errmsg("2PC data xid : " XID_FMT " has already existed", gxact->xid)));
             return;