yiguolei commented on code in PR #48187:
URL: https://github.com/apache/doris/pull/48187#discussion_r1968684342


##########
fe/fe-core/src/main/java/org/apache/doris/load/routineload/RoutineLoadManager.java:
##########
@@ -569,10 +578,26 @@ protected List<Long> getAvailableBackendIds(long jobId) 
throws LoadException {
                 // user may be dropped, or may not set resource tag property.
                 // Here we fall back to use replica tag
                 tags = getTagsFromReplicaAllocation(job.getDbId(), 
job.getTableId());
+            } else if (tags.isEmpty()) {
+                // NOTE: better not ConnectContext.getComputeGroup() here, 
because it could
+                // throw UserException if user's tag is invalid.
+                String computeGroupName = Env.getCurrentEnv().getAuth()
+                        
.getDefaultCloudCluster(job.getUserIdentity().getQualifiedUser());
+                if (!StringUtils.isEmpty(computeGroupName)) {
+                    computeGroup = Env.getCurrentEnv().getComputeGroupMgr()
+                            .getComputeGroupByStringNames(computeGroupName);
+                }
             }
         }
-        BeSelectionPolicy policy = new 
BeSelectionPolicy.Builder().needLoadAvailable().addTags(tags).build();
-        return Env.getCurrentSystemInfo().selectBackendIdsByPolicy(policy, -1 
/* as many as possible */);
+
+        if (computeGroup != null) {
+            BeSelectionPolicy policy = new 
BeSelectionPolicy.Builder().needLoadAvailable().build();
+            return Env.getCurrentSystemInfo()
+                    .selectBackendIdsByPolicy(policy, -1 /* as many as 
possible */, computeGroup.getBackendList());
+        } else {
+            BeSelectionPolicy policy = new 
BeSelectionPolicy.Builder().needLoadAvailable().addTags(tags).build();
+            return Env.getCurrentSystemInfo().selectBackendIdsByPolicy(policy, 
-1 /* as many as possible */);

Review Comment:
   上面这两个方法是有矛盾的
   因为policy 里的tags 属性定义了一部分,然后还有compute group。
   tags 过滤的backends 跟compute group 限定的backends 是啥关系?



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