[Fusion] Handle missing client configuration gracefully

[tobias-tengler]

No description provided.

[Copilot]

Pull Request Overview

This PR improves error handling for missing client configurations in the Fusion execution layer. When a client configuration cannot be found for a schema and operation type, the error is now caught and handled gracefully through the existing exception handling mechanism rather than propagating uncaught.

• Moved GetClient call inside the try-catch block in OnExecuteAsync method to enable graceful error handling
• Enhanced error message clarity by adding quotes around the schema name

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/HotChocolate/Fusion-vnext/src/Fusion.Execution/Execution/Nodes/OperationExecutionNode.cs	Moved GetClient invocation inside try-catch block to ensure exceptions from missing client configuration are properly caught and handled
src/HotChocolate/Fusion-vnext/src/Fusion.Execution/Execution/Clients/DefaultSourceSchemaClientScope.cs	Improved error message readability by adding quotes around schema name in the exception message

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (15bd931) to head (c76e045).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@     Coverage Diff      @@
##   main   #8916   +/-   ##
============================
============================

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[github-actions]

🚀 Fusion Gateway Performance Results

Simple Composite Query

Constant Load (50 VUs)

Requests/sec	Error Rate
5954.73 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.77ms	7.04ms	160.42ms	8.25ms	12.64ms	18.14ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
4669.89 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.70ms	36.86ms	272.06ms	47.53ms	107.17ms	126.03ms

Executed Query

fragment User on User {
  id
  username
  name
}

fragment Review on Review {
  id
  body
}

fragment Product on Product {
  inStock
  name
  price
  shippingEstimate
  upc
  weight
}

query TestQuery {
  topProducts(first: 5) {
    ...Product
    reviews {
      ...Review
      author {
        ...User
      }
    }
  }
}

Deep Recursion Query

Constant Load (50 VUs)

Requests/sec	Error Rate
70.56 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
19.72ms	658.33ms	1500.58ms	657.55ms	750.97ms	793.74ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
66.92 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
15.51ms	2156.26ms	7139.99ms	2270.76ms	4914.82ms	5500.75ms

Executed Query

fragment User on User {
  id
  username
  name
}

fragment Review on Review {
  id
  body
}

fragment Product on Product {
  inStock
  name
  price
  shippingEstimate
  upc
  weight
}

query TestQuery {
  users {
    ...User
    reviews {
      ...Review
      product {
        ...Product
        reviews {
          ...Review
          author {
            ...User
            reviews {
              ...Review
              product {
                ...Product
              }
            }
          }
        }
      }
    }
  }
  topProducts(first: 5) {
    ...Product
    reviews {
      ...Review
      author {
        ...User
        reviews {
          ...Review
          product {
            ...Product
          }
        }
      }
    }
  }
}

Variable Batching Throughput

Constant Load (50 VUs)

Requests/sec	Error Rate
23908.65 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	1.68ms	46.24ms	2.04ms	3.89ms	4.76ms

Ramping Load (0→50→500→50 VUs)

Requests/sec	Error Rate
19069.39 req/s	0.00%

📊 Response Time Metrics

Min	Med	Max	Avg	P90	P95
0.09ms	9.11ms	105.02ms	11.15ms	23.16ms	27.92ms

Executed Query

query TestQuery_8f7a46ce_2(
  $__fusion_1_upc: ID!
  $__fusion_2_price: Long!
  $__fusion_2_weight: Long!
) {
  productByUpc(upc: $__fusion_1_upc) {
    inStock
    shippingEstimate(weight: $__fusion_2_weight, price: $__fusion_2_price)
  }
}

Variables (5 sets batched in single request)

[
  { "__fusion_1_upc": "1", "__fusion_2_price": 899, "__fusion_2_weight": 100 },
  { "__fusion_1_upc": "2", "__fusion_2_price": 1299, "__fusion_2_weight": 1000 },
  { "__fusion_1_upc": "3", "__fusion_2_price": 15, "__fusion_2_weight": 20 },
  { "__fusion_1_upc": "4", "__fusion_2_price": 499, "__fusion_2_weight": 100 },
  { "__fusion_1_upc": "5", "__fusion_2_price": 1299, "__fusion_2_weight": 1000 }
]

No baseline data available for comparison.

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Run 19436474516 • Commit d326269 • Mon, 17 Nov 2025 16:36:00 GMT