rg/multisite: if the first shard fails to sync, we must drain and return error.

Signed-off-by: Shilpa Jagannath <[email protected]>

Author: Shilpa Jagannath

src/rgw/driver/rados/rgw_data_sync.cc

@@ -1702,8 +1702,12 @@ class RGWDataFullSyncSingleEntryCR : public RGWCoroutine {
                       lease_cr, bucket_shard_cache, nullptr, error_repo, tn, false);
           tn->log(10, SSTR("full sync: syncing shard_id " << sid << " of gen " << each->gen));
           if (first_shard) {
-            yield call(shard_cr);
             first_shard = false;
+            yield call(shard_cr);
+            if (retcode < 0) {
+              drain_all();
+              return set_cr_error(retcode);
+            }
           } else {
             yield_spawn_window(shard_cr, sc->lcc.adj_concurrency(cct->_conf->rgw_data_sync_spawn_window),
                               [&](uint64_t stack_id, int ret) {