ticdc: workround for get source id error (#8136)

ref #8110, ref #8115

pkg/pdutil/utils.go

@@ -17,8 +17,10 @@ import (
  "context"
  "strconv"
 
+ "github.com/pingcap/log"
  cerror "github.com/pingcap/tiflow/pkg/errors"
  pd "github.com/tikv/pd/client"
+ "go.uber.org/zap"
 )
 
 const sourceIDName = "source_id"
@@ -39,7 +41,9 @@ func GetSourceID(ctx context.Context, pdClient pd.Client) (uint64, error) {
  if len(sourceIDConfig) != 0 && sourceIDConfig[0].Value != "" {
  sourceID, err = strconv.ParseUint(sourceIDConfig[0].Value, 10, 64)
  if err != nil {
- return 0, cerror.WrapError(cerror.ErrPDEtcdAPIError, err)
+ // FIXME: return error here after we fix the compatibility issue
+ log.Error("parse source id failed, use the default sourceID: 1", zap.Error(err))
+ // return 0, cerror.WrapError(cerror.ErrPDEtcdAPIError, err)
  }
  }
  return sourceID, nil