when upgrading the version from dify 1.10.1-fix.1 to 1.15.0，occasional occurrence：Failed to execute code, which is likely a network issue, please check if the sandbox service is running. ( Error: Server disconnected without sending a response. )

[yanpx169]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

I am deploying in an offline docker compose environment, when upgrading the version from dify 1.10.1-fix.1 to 1.15.0,
an error occurred, please guide me on how to resolve this?

Dify will appear in version 1.10, but the probability of its occurrence is very low, approximately 10%. The probability of Dify appearing in version 1.15 is around 50%

error info:

sandbox-1           | INFO:     192.168.64.11:35966 - "POST /v1/sandbox/run HTTP/1.1" 200 OK
worker-1            | 2026-07-06 07:44:55.989 INFO [GraphWorker-1] [_client.py:1025] 69edaaac7b335c3ba4ff38c3a86011c0 - HTTP Request: POST http://sandbox:8194/v1/sandbox/run "HTTP/1.1 200 OK"
worker-1            | 2026-07-06 07:44:56.129 ERROR [GraphDispatcher] [error_handler.py:104]  - Node 1782289548987 failed with ABORT strategy: Failed to execute code, which is likely a network issue, please check if the sandbox service is running. ( Error: Server disconnected without sending a response. )
worker-1            | 2026-07-06 07:44:56.348 ERROR [Thread-129 (_generate_worker)] [workflow_entry.py:248] 69edaaac7b335c3ba4ff38c3a86011c0 - Unknown Error when workflow entry running
worker-1            | Traceback (most recent call last):
worker-1            |   File "/app/api/core/workflow/workflow_entry.py", line 244, in run
worker-1            |     yield from generator
worker-1            |   File "/app/api/core/workflow/workflow_entry.py", line 57, in iter_dify_graph_engine_events
worker-1            |     yield from filter_graph_events(
worker-1            |   File "/app/api/.venv/lib/python3.12/site-packages/graphon/graph_engine/filters/chain.py", line 21, in filter_graph_events
worker-1            |     for event in events:
worker-1            |                  ^^^^^^
worker-1            |   File "/app/api/.venv/lib/python3.12/site-packages/graphon/graph_engine/graph_engine.py", line 309, in run
worker-1            |     yield from lifecycle.run()
worker-1            |   File "/app/api/.venv/lib/python3.12/site-packages/graphon/graph_engine/graph_engine.py", line 77, in run
worker-1            |     yield from self.emit_terminal_events()
worker-1            |   File "/app/api/.venv/lib/python3.12/site-packages/graphon/graph_engine/graph_engine.py", line 341, in _emit_terminal_events
worker-1            |     raise error
worker-1            | RuntimeError: Failed to execute code, which is likely a network issue, please check if the sandbox service is running. ( Error: Server disconnected without sending a response. )
worker-1            | 2026-07-06 07:44:56.354 ERROR [GraphDispatcher] [error_handler.py:104]  - Node 1778722729299 failed with ABORT strategy: Failed to invoke tool [网络组件]通知模板: Failed to execute code, which is likely a network issue, please check if the sandbox service is running. ( Error: Server disconnected without sending a response. )
nginx-1             | 10.xx.1xx.1x1 - - [06/Jul/2026:07:44:56 +0000] "POST /console/api/apps/98d26167-9ac8-4f05-944e-0aea2d905224/advanced-chat/workflows/draft/run HTTP/1.1" 200 122575 "http://10.231.147.37/app/98d26167-9ac8-4f05-944e-0aea2d905224/workflow" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36" "-"
worker-1            | 2026-07-06 07:44:56.524 INFO [Dummy-118] [trace.py:128] 69edaaac7b335c3ba4ff38c3a86011c0 - Task tasks.app_generate.workflow_execute_task.workflow_based_app_execution_task[03c466e7-a725-4bd8-9695-349fe3521ea8] succeeded in 330.21767717879266s: None
worker-1            | 2026-07-06 07:44:58.527 ERROR [Thread-119 (_generate_worker)] [workflow_entry.py:248] 69edaaac7b335c3ba4ff38c3a86011c0 - Unknown Error when workflow entry running
worker-1            | Traceback (most recent call last):
worker-1            |   File "/app/api/core/workflow/workflow_entry.py", line 244, in run
worker-1            |     yield from generator
worker-1            |   File "/app/api/core/workflow/workflow_entry.py", line 57, in iter_dify_graph_engine_events
worker-1            |     yield from filter_graph_events(
worker-1            |   File "/app/api/.venv/lib/python3.12/site-packages/graphon/graph_engine/filters/chain.py", line 21, in filter_graph_events
worker-1            |     for event in events:
worker-1            |                  ^^^^^^
worker-1            |   File "/app/api/.venv/lib/python3.12/site-packages/graphon/graph_engine/graph_engine.py", line 309, in run
worker-1            |     yield from lifecycle.run()
worker-1            |   File "/app/api/.venv/lib/python3.12/site-packages/graphon/graph_engine/graph_engine.py", line 77, in run
worker-1            |     yield from self.emit_terminal_events()
worker-1            |   File "/app/api/.venv/lib/python3.12/site-packages/graphon/graph_engine/graph_engine.py", line 341, in _emit_terminal_events
worker-1            |     raise error
worker-1            | RuntimeError: Failed to invoke tool [网络组件]通知模板: Failed to execute code, which is likely a network issue, please check if the sandbox service is running. ( Error: Server disconnected without sending a response. )
nginx-1             | 10.xx.1xx.1x1 - - [06/Jul/2026:07:44:59 +0000] "GET /console/api/apps/98d26167-9ac8-4f05-944e-0aea2d905224/workflows/draft/system-variables HTTP/1.1" 200 13 "http://10.231.147.37/app/98d26167-9ac8-4f05-944e-0aea2d905224/workflow" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36" "-"

2. Additional context or comments

No response

[AaronZ345]

The sandbox-1 ... POST /v1/sandbox/run ... 200 OK line shows that the sandbox was reachable and did execute the request. The message about checking whether sandbox is running is generic: Dify 1.15.0 wraps any exception raised by the worker's httpx POST in that text. Here the useful part is Server disconnected without sending a response, which points to an intermittent worker-to-sandbox connection reset.

Because this was an offline upgrade, first verify that the service images are not mixed. The 1.15.0 compose file expects langgenius/dify-api:1.15.0 for API and worker, and langgenius/dify-sandbox:0.2.15:

docker compose images api worker sandbox
docker compose ps api worker sandbox
docker inspect --format '{{.Name}} restarts={{.RestartCount}} oom={{.State.OOMKilled}}' $(docker compose ps -q worker sandbox)
docker compose exec worker curl -fsS http://sandbox:8194/health
docker compose logs --since=15m worker sandbox

Check the restart and OOM result at the same timestamp as the failed run. If the Code node itself can run longer than 15 seconds, also raise SANDBOX_WORKER_TIMEOUT and keep CODE_EXECUTION_READ_TIMEOUT higher than it; the 1.15.0 defaults are 15 and 60 seconds respectively, and API, worker, and sandbox must be recreated after changing them.

This path is direct worker -> http://sandbox:8194, so changing the HTTP Request node or Squid/SSRF timeout will not address this error.