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Posted to notifications@superset.apache.org by "MatthewCurlerTAC (via GitHub)" <gi...@apache.org> on 2026/07/07 18:14:05 UTC
[I] Alerts/Reports sending chart as csv fails with HTTP 500 [superset]
MatthewCurlerTAC opened a new issue, #41862:
URL: https://github.com/apache/superset/issues/41862
### Bug description
When sending a chart as a csv, the task fails with an HTTP 500 error. This affects only the csv content type: the chart sends correctly as a png, pdf, and text. The chart is successfully exported to csv via the UI.
The error occurs whether:
- the task is scheduled as an alert or a report
- With and without `RESULTS_BACKEND` configured
The dataset in question is small (40 rows) and has no null values in any of the cells.
To reproduce:
1. Click **Settings** > **Alerts & Reports**
2. Add new report: **+ Report**
3. Under "Report Contents": 1) Content type = Chart; 2) Content format = csv
4. Save and trigger report
Similar bugs have been reported in the past:
- https://github.com/apache/superset/issues/28595: resolved by the author, but the same behavior as I am experiencing was noted in [this comment](https://github.com/apache/superset/issues/28595#issuecomment-2163500008) and it is not clear that they have the same cause.
- https://github.com/apache/superset/issues/36439 was an RLS issue - there is no RLS in my environment
- https://github.com/apache/superset/issues/36682 was caused by a non-standard delimiter - I'm using ','/the default
- https://github.com/apache/superset/issues/27499 was caused by NULLs in the dataset - there are no NULLs in this example.
This same alert has runs successfully on Superset 5.0.0, with the caveat that have been some minor configuration changes (within `superset_config.py`), which I have attempted to reverse for troubleshooting.
### Screenshots/recordings
_No response_
### Superset version
master / latest-dev
### Python version
3.10
### Node version
I don't know
### Browser
Not applicable
### Additional context
### Logs
```
[2026-07-07 16:01:01,125: INFO/ForkPoolWorker-1] Task reports.scheduler[9ad6226a-57bc-4ceb-a130-4e8960871a1f] succeeded in 0.010887326207011938s: None
[2026-07-07 16:01:40,807: INFO/MainProcess] Task reports.execute[b5a86a9d-b68c-4dc3-bee0-7ebac8f759b5] received
[2026-07-07 16:01:40,808: INFO/ForkPoolWorker-1] Executing alert/report, task id: b5a86a9d-b68c-4dc3-bee0-7ebac8f759b5, scheduled_dttm: 2026-07-07T16:01:40.770552+00:00
[2026-07-07 16:01:40,809: INFO/ForkPoolWorker-1] session is validated: id 5, executionid: b5a86a9d-b68c-4dc3-bee0-7ebac8f759b5
[2026-07-07 16:01:41,084: INFO/ForkPoolWorker-1] Query for b5a86a9d-b68c-4dc3-bee0-7ebac8f759b5 took 232.88 ms
[2026-07-07 16:01:41,888: ERROR/ForkPoolWorker-1] CSV generation failed after 0.78s - execution_id: b5a86a9d-b68c-4dc3-bee0-7ebac8f759b5
Traceback (most recent call last):
File "/app/superset/commands/report/execute.py", line 575, in _get_csv_data
csv_data = get_chart_csv_data(
File "/app/superset/utils/csv.py", line 104, in get_chart_csv_data
response = opener.open(chart_url, timeout=timeout)
File "/usr/local/lib/python3.10/urllib/request.py", line 525, in open
response = meth(req, response)
File "/usr/local/lib/python3.10/urllib/request.py", line 634, in http_response
response = self.parent.error(
File "/usr/local/lib/python3.10/urllib/request.py", line 563, in error
return self._call_chain(*args)
File "/usr/local/lib/python3.10/urllib/request.py", line 496, in _call_chain
result = func(*args)
File "/usr/local/lib/python3.10/urllib/request.py", line 643, in http_error_default
raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 500: INTERNAL SERVER ERROR
[2026-07-07 16:01:41,912: INFO/ForkPoolWorker-1] header_data in notifications for alerts and reports {'notification_type': 'Alert', 'notification_source': <ReportSourceFormat.CHART: 'chart'>, 'notification_format': 'CSV', 'chart_id': 252, 'dashboard_id': None, 'owners': [xxx], 'slack_channels': [], 'execution_id': 'b5a86a9d-b68c-4dc3-bee0-7ebac8f759b5'}, taskid, b5a86a9d-b68c-4dc3-bee0-7ebac8f759b5
[2026-07-07 16:01:44,783: INFO/ForkPoolWorker-1] Report sent to email, task_id: None, notification content is None
[2026-07-07 16:01:44,798: ERROR/ForkPoolWorker-1] A downstream exception occurred while generating a report: b5a86a9d-b68c-4dc3-bee0-7ebac8f759b5. Failed generating csv HTTP Error 500: INTERNAL SERVER ERROR
Traceback (most recent call last):
File "/app/superset/commands/report/execute.py", line 575, in _get_csv_data
csv_data = get_chart_csv_data(
File "/app/superset/utils/csv.py", line 104, in get_chart_csv_data
response = opener.open(chart_url, timeout=timeout)
File "/usr/local/lib/python3.10/urllib/request.py", line 525, in open
response = meth(req, response)
File "/usr/local/lib/python3.10/urllib/request.py", line 634, in http_response
response = self.parent.error(
File "/usr/local/lib/python3.10/urllib/request.py", line 563, in error
return self._call_chain(*args)
File "/usr/local/lib/python3.10/urllib/request.py", line 496, in _call_chain
result = func(*args)
File "/usr/local/lib/python3.10/urllib/request.py", line 643, in http_error_default
raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 500: INTERNAL SERVER ERROR
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/app/superset/tasks/scheduler.py", line 135, in execute
).run()
File "/app/superset/commands/report/execute.py", line 1255, in run
).run()
File "/app/superset/utils/decorators.py", line 267, in wrapped
return on_error(ex)
File "/app/superset/utils/decorators.py", line 232, in on_error
raise ex
File "/app/superset/utils/decorators.py", line 260, in wrapped
result = func(*args, **kwargs)
File "/app/superset/commands/report/execute.py", line 1196, in run
).next()
File "/app/superset/commands/report/execute.py", line 958, in next
self.send()
File "/app/superset/commands/report/execute.py", line 851, in send
notification_content = self._get_notification_content()
File "/app/superset/commands/report/execute.py", line 743, in _get_notification_content
csv_data = self._get_csv_data()
File "/app/superset/commands/report/execute.py", line 603, in _get_csv_data
raise ReportScheduleCsvFailedError(
superset.commands.report.exceptions.ReportScheduleCsvFailedError: Failed generating csv HTTP Error 500: INTERNAL SERVER ERROR
[2026-07-07 16:01:44,804: INFO/ForkPoolWorker-1] Task reports.execute[b5a86a9d-b68c-4dc3-bee0-7ebac8f759b5] succeeded in 3.9957655393518507s: None
[2026-07-07 16:02:00,060: INFO/MainProcess] Task reports.scheduler[194eb99f-04fa-47c0-8bc9-c7be6faa8594] received
[2026-07-07 16:02:00,077: INFO/ForkPoolWorker-1] Task reports.scheduler[194eb99f-04fa-47c0-8bc9-c7be6faa8594] succeeded in 0.014652850106358528s: None
[2026-07-07 16:03:00,053: INFO/MainProcess] Task reports.scheduler[9b02af77-1cc8-40d9-8109-91a67fe650f1] received
[2026-07-07 16:03:00,069: INFO/ForkPoolWorker-1] Task reports.scheduler[9b02af77-1cc8-40d9-8109-91a67fe650f1] succeeded in 0.01434366311877966s: None
```
### Configuration
Only (potentially) relevant sections included.
#### Failing (master)
```python
SUPERSET_WEBSERVER_PROTOCOL = os.getenv("SUPERSET_WEBSERVER_PROTOCOL", "https")
SUPERSET_WEBSERVER_ADDRESS = os.environ.get("SUPERSET_WEBSERVER_ADDRESS", "0.0.0.0")
SUPERSET_WEBSERVER_PORT = os.environ.get("SUPERSET_WEBSERVER_PORT", "8088")
SUPERSET_WEBSERVER_TIMEOUT = 300
SUPERSET_WEB_SUBDOMAIN = os.environ.get("SUPERSET_WEB_SUBDOMAIN")
ENABLE_PROXY_FIX = True
# ---------------------------------------------------
# TALISMAN SETTINGS
# ---------------------------------------------------
TALISMAN_ENABLED = True
TALISMAN_CONFIG = {
"content_security_policy": {
"base-uri": ["'self'"],
"default-src": ["'self'"],
"img-src": [
"'self'",
"blob:",
"data:",
"https://apachesuperset.gateway.scarf.sh",
"https://static.scarf.sh/",
# "https://cdn.brandfolder.io", # Uncomment when SLACK_ENABLE_AVATARS is True # noqa: E501
"https://ows.terrestris.de",
"https://cdn.document360.io",
],
"worker-src": ["'self'", "blob:"],
"connect-src": [
"'self'",
"https://api.mapbox.com",
"https://events.mapbox.com",
"https://tile.openstreetmap.org",
"https://tile.osm.ch",
"https://basemaps.cartocdn.com",
"https://*.basemaps.cartocdn.com",
"https://tiles.openfreemap.org",
"https://*.maptiler.com",
"https://tiles.stadiamaps.com",
"https://tiles.versatiles.org",
"https://*.protomaps.com",
"https://*.maplibre.org",
],
"object-src": "'none'",
"style-src": [
"'self'",
"'unsafe-inline'",
*[f"https://{d}" for d in THEME_FONT_URL_ALLOWED_DOMAINS],
],
"font-src": [
"'self'",
*[f"https://{d}" for d in THEME_FONT_URL_ALLOWED_DOMAINS],
],
"script-src": ["'self'", "'strict-dynamic'"],
},
"content_security_policy_nonce_in": ["script-src"],
"force_https": False, # Must be False to allow Alerts/Reports to connect via http
"session_cookie_secure": True,
}
REDIS_HOST = os.getenv("REDIS_HOST", "redis")
REDIS_PORT = int(os.getenv("REDIS_PORT", "6379"))
# ---------------------------------------------------
# SESSION MANAGEMENT
# ---------------------------------------------------
SESSION_SERVER_SIDE = True
SESSION_TYPE = 'redis'
SESSION_REDIS = Redis(
host=REDIS_HOST,
port=REDIS_PORT,
db=5,
)
SESSION_USE_SIGNER = True
PERMANENT_SESSION_LIFETIME = timedelta(hours=24)
SESSION_COOKIE_SECURE = True
SESSION_COOKIE_HTTPONLY = True
SESSION_COOKIE_SAMESITE = "Lax"
RATELIMIT_STORAGE_URI = f"redis://{REDIS_HOST}:{REDIS_PORT}/6"
# ---------------------------------------------------
# CACHE SETTINGS
# ---------------------------------------------------
CACHE_CONFIG: CacheConfig = {
"CACHE_TYPE": "RedisCache",
"CACHE_DEFAULT_TIMEOUT": 43200, # 12 hours
"CACHE_KEY_PREFIX": "superset_results_",
"CACHE_REDIS_HOST": REDIS_HOST,
"CACHE_REDIS_PORT": REDIS_PORT,
"CACHE_REDIS_DB": 0,
}
DATA_CACHE_CONFIG = CACHE_CONFIG
RESULTS_BACKEND = RedisCache(
host = REDIS_HOST,
port = REDIS_PORT,
db = 4,
default_timeout = 1800,
key_prefix = "superset_results_"
)
class CeleryConfig:
broker_url = f"redis://{REDIS_HOST}:{REDIS_PORT}/3"
imports = (
"superset.sql_lab",
"superset.tasks.scheduler",
"superset.tasks.thumbnails",
"superset.tasks.cache",
)
result_backend = f"redis://{REDIS_HOST}:{REDIS_PORT}/8"
worker_prefetch_multiplier = 1
task_acks_late = False
beat_schedule = {
"reports.scheduler": {
"task": "reports.scheduler",
"schedule": crontab(minute="*", hour="*"),
},
"reports.prune_log": {
"task": "reports.prune_log",
"schedule": crontab(minute=10, hour=0),
},
}
CELERY_CONFIG = CeleryConfig
# ---------------------------------------------------
# FEATURE FLAGS
# ---------------------------------------------------
FEATURE_FLAGS = {
"ALERT_REPORTS": True,
"ALERT_REPORTS_FILTER": True,
"ALERT_REPORT_TABS": True,
"AUTH_ROLES_SYNC_AT_LOGIN": True,
"DASHBOARD_RBAC": True,
"ENABLE_TEMPLATE_PROCESSING": True,
"PLAYWRIGHT_REPORTS_AND_THUMBNAILS": True,
"RLS_IN_SQLLAB": True,
"TAGGING_SYSTEM": True,
}
ALERT_REPORTS_NOTIFICATION_DRY_RUN = False
ALERT_REPORTS_DEFAULT_RETENTION = 30
ALERT_MINIMUM_INTERVAL = int(timedelta(minutes=60).total_seconds())
REPORT_MINIMUM_INTERVAL = int(timedelta(minutes=60).total_seconds())
SCREENSHOT_PLAYWRIGHT_WAIT_EVENT = "domcontentloaded"
SCREENSHOT_PLAYWRIGHT_DEFAULT_TIMEOUT = int(timedelta(seconds=120).total_seconds()*1000)
WEBDRIVER_BASEURL = "http://superset_app:8088/"
WEBDRIVER_BASEURL_USER_FRIENDLY = f"https://{SUPERSET_WEB_SUBDOMAIN}.example.com"
WEBDRIVER_OPTION_ARGS = ["--headless", "--marionette"]
```
#### Working (5.0.0)
```python
DEV_MODE = False
SECRET_KEY = os.getenv("SUPERSET_SECRET_KEY")
SUPERSET_WEBSERVER_PROTOCOL = os.getenv("SUPERSET_WEBSERVER_PROTOCOL", "https")
SUPERSET_WEBSERVER_ADDRESS = os.environ.get("SUPERSET_WEBSERVER_ADDRESS",
"0.0.0.0") # noqa: S104
SUPERSET_WEBSERVER_PORT = os.environ.get("SUPERSET_WEBSERVER_PORT", "8088")
SUPERSET_WEBSERVER_TIMEOUT = 300 # 5 minutes timeout for HTTP requests
SUPERSET_WEB_SUBDOMAIN = os.environ.get("SUPERSET_WEB_SUBDOMAIN")
WEBDRIVER_BASEURL = "http://superset:8088/"
WEBDRIVER_BASEURL_USER_FRIENDLY = f"https://{SUPERSET_WEB_SUBDOMAIN}.example.com"
# Will be behind reverse proxy
ENABLE_PROXY_FIX = True
# ---------------------------------------------------
# CACHE SETTINGS
# ---------------------------------------------------
# RESULTS_BACKEND = FileSystemCache("/app/superset_home/sqllab")
RESULTS_BACKEND = RedisCache(
host=REDIS_HOST,
port=REDIS_PORT,
key_prefix="superset_results"
)
RATELIMIT_STORAGE_URI = f"redis://{REDIS_HOST}:{REDIS_PORT}"
CACHE_CONFIG = {
"CACHE_TYPE": "RedisCache",
"CACHE_DEFAULT_TIMEOUT": 300,
"CACHE_KEY_PREFIX": "superset_",
"CACHE_REDIS_HOST": REDIS_HOST,
"CACHE_REDIS_PORT": REDIS_PORT,
"CACHE_REDIS_DB": REDIS_RESULTS_DB,
}
DATA_CACHE_CONFIG = CACHE_CONFIG
class CeleryConfig:
broker_url = f"redis://{REDIS_HOST}:{REDIS_PORT}/{REDIS_CELERY_DB}"
imports = (
"superset.sql_lab",
"superset.tasks.scheduler",
"superset.tasks.thumbnails",
"superset.tasks.cache",
)
result_backend = f"redis://{REDIS_HOST}:{REDIS_PORT}/{REDIS_RESULTS_DB}"
worker_prefetch_multiplier = 1
task_acks_late = False
beat_schedule = {
"reports.scheduler": {
"task": "reports.scheduler",
"schedule": crontab(minute="*", hour="*"),
},
"reports.prune_log": {
"task": "reports.prune_log",
"schedule": crontab(minute=10, hour=0),
},
}
CELERY_CONFIG = CeleryConfig
# ---------------------------------------------------
# FEATURE FLAGS
# ---------------------------------------------------
FEATURE_FLAGS = {
"ALERT_REPORTS": True,
"ALERT_REPORT_TABS": True,
"ENABLE_TEMPLATE_PROCESSING": True,
"TAGGING_SYSTEM": True,
"DASHBOARD_RBAC": True,
"PLAYWRIGHT_REPORTS_AND_THUMBNAILS": True,
"RLS_IN_SQLLAB": True,
"AUTH_ROLES_SYNC_AT_LOGIN": True
}
```
### Checklist
- [x] I have searched Superset docs and Slack and didn't find a solution to my problem.
- [x] I have searched the GitHub issue tracker and didn't find a similar bug report.
- [x] I have checked Superset's logs for errors and if I found a relevant Python stacktrace, I included it here as text in the "additional context" section.
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Re: [I] Alerts/Reports sending chart as csv fails with HTTP 500 [superset]
Posted by "MatthewCurlerTAC (via GitHub)" <gi...@apache.org>.
MatthewCurlerTAC commented on issue #41862:
URL: https://github.com/apache/superset/issues/41862#issuecomment-4929462122
I tested the patch by building superset with `SUPERSET_TAG=227b3a4`, corresponding to the merge commit into main. Sending a chart as a csv continues to generate `HTTP Error 500`. I think this issue needs to be reopened.
### superset logs
The root error appears to be
```
File "/app/superset/charts/client_processing.py", line 354, in apply_client_processing
StringIO(data),
TypeError: initial_value must be str or None, not bytes
ERROR:superset.views.error_handling:initial_value must be str or None, not bytes
```
Full logs:
```
INFO:superset.commands.report.execute_now:Manually executing report schedule <report_name> (id: 5), execution_id: de233e3c-c39e-44a1-96d4-4738b7af67f3
DEBUG:celery.utils.functional:
def execute(self, report_schedule_id):
return 1
DEBUG:superset.stats_logger:[stats_logger] (incr) ReportScheduleRestApi.execute.success
DEBUG:superset.stats_logger:[stats_logger] (timing) ReportScheduleRestApi.execute.time | 264.1265047714114
1.2.3.4 - - [09/Jul/2026:20:38:17 +0000] "POST /api/v1/report/5/execute HTTP/1.1" 200 115 "https://superset.example.com/alert/list/?pageIndex=0&sortColumn=name&sortOrder=desc" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.0"
DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.99.88.77:9030/default_catalog.dmh
DEBUG:starrocks.dialect:connect_args: {'host': '100.99.88.77', 'database': 'default_catalog.dmh', 'user': '<db_user>', 'password': '<db_pass>', 'port': 9030, 'client_flag': 2}
WARNING:starrocks.dialect:Failed to get run_mode: (pymysql.err.OperationalError) (5203, 'Access denied; you need (at least one of) the OPERATE privilege(s) on SYSTEM for this operation. Please ask the admin to grant permission(s) or try activating existing roles using <set [default] role>. Current role(s): [dmh_ro]. Inactivated role(s): NONE.')
[SQL: ADMIN SHOW FRONTEND CONFIG LIKE 'run_mode']
(Background on this error at: https://sqlalche.me/e/14/e3q8)
DEBUG:starrocks.dialect:system run mode: shared_nothing
DEBUG:superset.common.query_object:QueryObject CACHE KEY generated: 1be89de227b363f6f2ec6b7f2a774ba814f0f52f07be862e872d9af7f18b028d from dict with keys: ['changed_on', 'columns', 'datasource', 'extra_cache_keys', 'extras', 'filter', 'granularity', 'group_others_when_limit_reached', 'inner_from_dttm', 'inner_to_dttm', 'is_rowcount', 'is_timeseries', 'metrics', 'order_desc', 'orderby', 'post_processing', 'result_type', 'rls', 'row_limit', 'row_offset', 'series_columns', 'series_limit', 'series_limit_metric', 'time_compare_full_range', 'time_shift']
DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.99.88.77:9030/default_catalog.dmh
DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.99.88.77:9030/default_catalog.dmh
DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.99.88.77:9030/default_catalog.dmh
DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.99.88.77:9030/default_catalog.dmh
DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.99.88.77:9030/default_catalog.dmh
DEBUG:superset.stats_logger:[stats_logger] (incr) execute_sql
DEBUG:superset.stats_logger:[stats_logger] (incr) load_into_dataframe
DEBUG:superset.common.query_object:post_processing:
[]
DEBUG:superset.stats_logger:[stats_logger] (incr) QueryObject.post_processing
DEBUG:superset.stats_logger:[stats_logger] (incr) loaded_from_source
DEBUG:superset.stats_logger:[stats_logger] (incr) set_cache_key
DEBUG:superset.utils.cache:CACHE SET - Key: 1be89de227b363f6f2ec6b7f2a774ba814f0f52f07be862e872d9af7f18b028d, Datasource: 85__table, Timeout: 10800
DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.99.88.77:9030/default_catalog.dmh
DEBUG:superset.stats_logger:[stats_logger] (incr) ChartDataRestApi.data.error
WARNING:superset.views.error_handling:Exception
Traceback (most recent call last):
File "/app/.venv/lib/python3.10/site-packages/flask/app.py", line 1484, in full_dispatch_request
rv = self.dispatch_request()
File "/app/.venv/lib/python3.10/site-packages/flask/app.py", line 1469, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
File "/app/.venv/lib/python3.10/site-packages/flask_appbuilder/security/decorators.py", line 128, in wraps
return f(self, *args, **kwargs)
File "/app/superset/views/base_api.py", line 127, in wraps
duration, response = time_function(f, self, *args, **kwargs)
File "/app/superset/utils/core.py", line 1600, in time_function
response = func(*args, **kwargs)
File "/app/superset/utils/log.py", line 299, in wrapper
value = f(*args, add_extra_log_payload=log, **kwargs)
File "/app/superset/charts/data/api.py", line 353, in data
return self._get_data_response(
File "/app/superset/utils/log.py", line 301, in wrapper
value = f(*args, **kwargs)
File "/app/superset/charts/data/api.py", line 592, in _get_data_response
return self._send_chart_response(
File "/app/superset/charts/data/api.py", line 474, in _send_chart_response
result = apply_client_processing(result, form_data, datasource)
File "/app/superset/utils/log.py", line 301, in wrapper
value = f(*args, **kwargs)
File "/app/superset/charts/client_processing.py", line 354, in apply_client_processing
StringIO(data),
TypeError: initial_value must be str or None, not bytes
ERROR:superset.views.error_handling:initial_value must be str or None, not bytes
Traceback (most recent call last):
File "/app/.venv/lib/python3.10/site-packages/flask/app.py", line 1484, in full_dispatch_request
rv = self.dispatch_request()
File "/app/.venv/lib/python3.10/site-packages/flask/app.py", line 1469, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
File "/app/.venv/lib/python3.10/site-packages/flask_appbuilder/security/decorators.py", line 128, in wraps
return f(self, *args, **kwargs)
File "/app/superset/views/base_api.py", line 127, in wraps
duration, response = time_function(f, self, *args, **kwargs)
File "/app/superset/utils/core.py", line 1600, in time_function
response = func(*args, **kwargs)
File "/app/superset/utils/log.py", line 299, in wrapper
value = f(*args, add_extra_log_payload=log, **kwargs)
File "/app/superset/charts/data/api.py", line 353, in data
return self._get_data_response(
File "/app/superset/utils/log.py", line 301, in wrapper
value = f(*args, **kwargs)
File "/app/superset/charts/data/api.py", line 592, in _get_data_response
return self._send_chart_response(
File "/app/superset/charts/data/api.py", line 474, in _send_chart_response
result = apply_client_processing(result, form_data, datasource)
File "/app/superset/utils/log.py", line 301, in wrapper
value = f(*args, **kwargs)
File "/app/superset/charts/client_processing.py", line 354, in apply_client_processing
StringIO(data),
TypeError: initial_value must be str or None, not bytes
172.18.0.5 - - [09/Jul/2026:20:38:20 +0000] "POST /api/v1/chart/data HTTP/1.1" 500 243 "-" "Python-urllib/3.10"
DEBUG:cron_descriptor.GetText:/app/.venv/lib/python3.10/site-packages/cron_descriptor/locale/en_US.mo Loaded
DEBUG:superset.stats_logger:[stats_logger] (incr) ReportScheduleRestApi.get_list.success
DEBUG:superset.stats_logger:[stats_logger] (timing) ReportScheduleRestApi.get_list.time | 74.73946362733841
1.2.3.4 - - [09/Jul/2026:20:38:23 +0000] "GET /api/v1/report/?q=(filters:!((col:type,opr:eq,value:Alert)),order_column:name,order_direction:desc,page:0,page_size:25) HTTP/1.1" 200 770 "https://superset.example.com/alert/list/?pageIndex=0&sortColumn=name&sortOrder=desc" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.0"
DEBUG:superset.stats_logger:[stats_logger] (incr) ReportExecutionLogRestApi.get_list.success
DEBUG:superset.stats_logger:[stats_logger] (timing) ReportExecutionLogRestApi.get_list.time | 51.861213985830545
1.2.3.4 - - [09/Jul/2026:20:38:26 +0000] "GET /api/v1/report/5/log/?q=(order_column:start_dttm,order_direction:desc,page:0,page_size:25) HTTP/1.1" 200 1077 "https://superset.example.com/alert/5/log?pageIndex=0&sortColumn=start_dttm&sortOrder=desc" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.0"
DEBUG:superset.stats_logger:[stats_logger] (incr) ReportScheduleRestApi.get.success
DEBUG:superset.stats_logger:[stats_logger] (timing) ReportScheduleRestApi.get.time | 102.88260225206614
1.2.3.4 - - [09/Jul/2026:20:38:26 +0000] "GET /api/v1/report/5 HTTP/1.1" 200 1316 "https://superset.example.com/alert/5/log?pageIndex=0&sortColumn=start_dttm&sortOrder=desc" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.0"
DEBUG:superset.stats_logger:[stats_logger] (incr) log
1.2.3.4 - - [09/Jul/2026:20:38:27 +0000] "POST /log/?explode=events HTTP/1.1" 200 1 "https://superset.example.com/alert/5/log?pageIndex=0&sortColumn=start_dttm&sortOrder=desc" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.0"
DEBUG:superset.stats_logger:[stats_logger] (incr) health
127.0.0.1 - - [09/Jul/2026:20:38:39 +0000] "GET //health HTTP/1.1" 200 2 "-" "curl/7.88.1"
```
### worker logs
These are not particularly useful, but do show the 500 error.
```
[2026-07-09 20:38:17,628: INFO/MainProcess] Task reports.execute[de233e3c-c39e-44a1-96d4-4738b7af67f3] received
[2026-07-09 20:38:17,634: INFO/ForkPoolWorker-1] Executing alert/report, task id: de233e3c-c39e-44a1-96d4-4738b7af67f3, scheduled_dttm: 2026-07-09T20:38:17.402165+00:00
[2026-07-09 20:38:17,638: INFO/ForkPoolWorker-1] session is validated: id 5, executionid: de233e3c-c39e-44a1-96d4-4738b7af67f3
[2026-07-09 20:38:18,516: INFO/ForkPoolWorker-1] Query for de233e3c-c39e-44a1-96d4-4738b7af67f3 took 307.95 ms
[2026-07-09 20:38:20,412: ERROR/ForkPoolWorker-1] CSV generation failed after 1.86s - execution_id: de233e3c-c39e-44a1-96d4-4738b7af67f3
Traceback (most recent call last):
File "/app/superset/commands/report/execute.py", line 724, in _get_csv_data
csv_data = self._post_chart_data(
File "/app/superset/commands/report/execute.py", line 694, in _post_chart_data
urllib.request.build_opener().open(request, timeout=timeout) # noqa: S310
File "/usr/local/lib/python3.10/urllib/request.py", line 525, in open
response = meth(req, response)
File "/usr/local/lib/python3.10/urllib/request.py", line 634, in http_response
response = self.parent.error(
File "/usr/local/lib/python3.10/urllib/request.py", line 563, in error
return self._call_chain(*args)
File "/usr/local/lib/python3.10/urllib/request.py", line 496, in _call_chain
result = func(*args)
File "/usr/local/lib/python3.10/urllib/request.py", line 643, in http_error_default
raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 500: INTERNAL SERVER ERROR
[2026-07-09 20:38:20,455: INFO/ForkPoolWorker-1] header_data in notifications for alerts and reports {'notification_type': 'Alert', 'notification_source': <ReportSourceFormat.CHART: 'chart'>, 'notification_format': 'CSV', 'chart_id': 274, 'dashboard_id': None, 'editors': [2], 'slack_channels': [], 'execution_id': 'de233e3c-c39e-44a1-96d4-4738b7af67f3'}, taskid, de233e3c-c39e-44a1-96d4-4738b7af67f3
[2026-07-09 20:38:23,157: INFO/ForkPoolWorker-1] Report sent to email, task_id: None, notification content is None
[2026-07-09 20:38:23,167: ERROR/ForkPoolWorker-1] A downstream exception occurred while generating a report: de233e3c-c39e-44a1-96d4-4738b7af67f3. Failed generating csv HTTP Error 500: INTERNAL SERVER ERROR
Traceback (most recent call last):
File "/app/superset/commands/report/execute.py", line 724, in _get_csv_data
csv_data = self._post_chart_data(
File "/app/superset/commands/report/execute.py", line 694, in _post_chart_data
urllib.request.build_opener().open(request, timeout=timeout) # noqa: S310
File "/usr/local/lib/python3.10/urllib/request.py", line 525, in open
response = meth(req, response)
File "/usr/local/lib/python3.10/urllib/request.py", line 634, in http_response
response = self.parent.error(
File "/usr/local/lib/python3.10/urllib/request.py", line 563, in error
return self._call_chain(*args)
File "/usr/local/lib/python3.10/urllib/request.py", line 496, in _call_chain
result = func(*args)
File "/usr/local/lib/python3.10/urllib/request.py", line 643, in http_error_default
raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 500: INTERNAL SERVER ERROR
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/app/superset/tasks/scheduler.py", line 135, in execute
).run()
File "/app/superset/commands/report/execute.py", line 1410, in run
).run()
File "/app/superset/utils/decorators.py", line 267, in wrapped
return on_error(ex)
File "/app/superset/utils/decorators.py", line 232, in on_error
raise ex
File "/app/superset/utils/decorators.py", line 260, in wrapped
result = func(*args, **kwargs)
File "/app/superset/commands/report/execute.py", line 1351, in run
).next()
File "/app/superset/commands/report/execute.py", line 1113, in next
self.send()
File "/app/superset/commands/report/execute.py", line 1005, in send
notification_content = self._get_notification_content()
File "/app/superset/commands/report/execute.py", line 897, in _get_notification_content
csv_data = self._get_csv_data()
File "/app/superset/commands/report/execute.py", line 753, in _get_csv_data
raise ReportScheduleCsvFailedError(
superset.commands.report.exceptions.ReportScheduleCsvFailedError: Failed generating csv HTTP Error 500: INTERNAL SERVER ERROR
[2026-07-09 20:38:23,172: INFO/ForkPoolWorker-1] Task reports.execute[de233e3c-c39e-44a1-96d4-4738b7af67f3] succeeded in 5.538199000991881s: None
```
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Re: [I] Alerts/Reports sending chart as csv fails with HTTP 500 [superset]
Posted by "dosubot[bot] (via GitHub)" <gi...@apache.org>.
dosubot[bot] commented on issue #41862:
URL: https://github.com/apache/superset/issues/41862#issuecomment-4907103231
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<!-- Answer -->
The most likely cause of your HTTP 500 is a **`SESSION_COOKIE_SECURE = True` + HTTP `WEBDRIVER_BASEURL` mismatch**. In your failing config you have:
```python
SESSION_COOKIE_SECURE = True
WEBDRIVER_BASEURL = "http://superset_app:8088/" # HTTP, not HTTPS
```
When the Celery worker calls the internal CSV endpoint, it attaches the session cookie to an HTTP request [[1]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/utils/csv.py#L90-L91). But because `SESSION_COOKIE_SECURE = True`, the browser/client layer drops the cookie on non-HTTPS connections. The CSV endpoint then receives an unauthenticated request and returns 500.
This would also explain why PNG/PDF still work — those go through Playwright (which loads the full page over the same internal URL but handles cookies differently via the machine auth provider), while CSV uses a bare `urllib` request [[2]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/utils/csv.py).
**Fix — choose one:**
1. **(Recommended)** Set `SESSION_COOKIE_SECURE = False` for the internal network (safe if your Superset workers and app are on a trusted Docker network):
```python
SESSION_COOKIE_SECURE = False
```
2. Or switch the internal base URL to HTTPS (requires the app container or a sidecar proxy to terminate TLS):
```python
WEBDRIVER_BASEURL = "https://superset_app:8088/"
```
**Additional things to verify:**
- Confirm the worker can reach `http://superset_app:8088/health` (your 5.0.0 config used `http://superset:8088/` — if the service name changed, DNS resolution inside Docker may also be failing).
- Check the *app server* logs (not the worker) around `16:01:41` for the actual 500 traceback — it will reveal whether the failure is an auth error, CSRF rejection, or something else entirely.
- A recent PR added network timeouts to this code path [[3]](https://github.com/apache/superset/pull/41250), which would surface pre-existing auth failures faster rather than hanging indefinitely, but it isn't itself the cause of the 500.
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Re: [I] Alerts/Reports sending chart as csv fails with HTTP 500 [superset]
Posted by "rusackas (via GitHub)" <gi...@apache.org>.
rusackas commented on issue #41862:
URL: https://github.com/apache/superset/issues/41862#issuecomment-4917250886
@nosumano20 does the linked PR from @durgaprasadml overlap at all with your approach? Would it be worth opening a PR with your patch(es)?
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Re: [I] Alerts/Reports sending chart as csv fails with HTTP 500 [superset]
Posted by "durgaprasadml (via GitHub)" <gi...@apache.org>.
durgaprasadml commented on issue #41862:
URL: https://github.com/apache/superset/issues/41862#issuecomment-4907355983
Hi @MatthewCurlerTAC, thanks for the detailed report.
I’d like to investigate this issue and work on a fix.
I’ll reproduce the regression on the latest master, compare the current CSV report generation flow with the previous working implementation, identify the root cause, and prepare a minimal, production-ready fix along with regression tests to ensure scheduled CSV reports continue to work without affecting other report formats.
I’ll share my findings and open a pull request once the fix is ready.
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Re: [I] Alerts/Reports sending chart as csv fails with HTTP 500 [superset]
Posted by "nosumano20 (via GitHub)" <gi...@apache.org>.
nosumano20 commented on issue #41862:
URL: https://github.com/apache/superset/issues/41862#issuecomment-4907417279
[superset_csv_fix.zip](https://github.com/user-attachments/files/29761574/superset_csv_fix.zip)
Man, I ran into this same headache last week. Turns out the csv serializer was tripping over the chart metadata buffer during the async task handoff. I patched the worker logic to handle the stream properly and it worked like a charm.
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Re: [I] Alerts/Reports sending chart as csv fails with HTTP 500 [superset]
Posted by "MatthewCurlerTAC (via GitHub)" <gi...@apache.org>.
MatthewCurlerTAC commented on issue #41862:
URL: https://github.com/apache/superset/issues/41862#issuecomment-4907394749
- I have tested and sending as a csv fails with `SESSION_COOKIE_SECURE` being `True` and `False`. Same goes for Talisman config.
- All other content types send successfully: the worker is able to communicate with app, successfully authenticate, and load the chart; this is something specific to the csv export.
- The superset_app logs throw the same error regardless of the cookie_secure settings:
```
WARNING:superset.views.error_handling:Exception
Traceback (most recent call last):
File "/app/.venv/lib/python3.10/site-packages/flask/app.py", line 1484, in full_dispatch_request
rv = self.dispatch_request()
File "/app/.venv/lib/python3.10/site-packages/flask/app.py", line 1469, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
File "/app/.venv/lib/python3.10/site-packages/flask_appbuilder/security/decorators.py", line 128, in wraps
return f(self, *args, **kwargs)
File "/app/superset/views/base_api.py", line 127, in wraps
duration, response = time_function(f, self, *args, **kwargs)
File "/app/superset/utils/core.py", line 1600, in time_function
response = func(*args, **kwargs)
File "/app/superset/utils/log.py", line 299, in wrapper
value = f(*args, add_extra_log_payload=log, **kwargs)
File "/app/superset/charts/data/api.py", line 249, in get_data
return self._get_data_response(
File "/app/superset/utils/log.py", line 301, in wrapper
value = f(*args, **kwargs)
File "/app/superset/charts/data/api.py", line 582, in _get_data_response
return self._send_chart_response(
File "/app/superset/charts/data/api.py", line 464, in _send_chart_response
result = apply_client_processing(result, form_data, datasource)
File "/app/superset/utils/log.py", line 301, in wrapper
value = f(*args, **kwargs)
File "/app/superset/charts/client_processing.py", line 354, in apply_client_processing
StringIO(data),
TypeError: initial_value must be str or None, not bytes
ERROR:superset.views.error_handling:initial_value must be str or None, not bytes
Traceback (most recent call last):
File "/app/.venv/lib/python3.10/site-packages/flask/app.py", line 1484, in full_dispatch_request
rv = self.dispatch_request()
File "/app/.venv/lib/python3.10/site-packages/flask/app.py", line 1469, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
File "/app/.venv/lib/python3.10/site-packages/flask_appbuilder/security/decorators.py", line 128, in wraps
return f(self, *args, **kwargs)
File "/app/superset/views/base_api.py", line 127, in wraps
duration, response = time_function(f, self, *args, **kwargs)
File "/app/superset/utils/core.py", line 1600, in time_function
response = func(*args, **kwargs)
File "/app/superset/utils/log.py", line 299, in wrapper
value = f(*args, add_extra_log_payload=log, **kwargs)
File "/app/superset/charts/data/api.py", line 249, in get_data
return self._get_data_response(
File "/app/superset/utils/log.py", line 301, in wrapper
value = f(*args, **kwargs)
File "/app/superset/charts/data/api.py", line 582, in _get_data_response
return self._send_chart_response(
File "/app/superset/charts/data/api.py", line 464, in _send_chart_response
result = apply_client_processing(result, form_data, datasource)
File "/app/superset/utils/log.py", line 301, in wrapper
value = f(*args, **kwargs)
File "/app/superset/charts/client_processing.py", line 354, in apply_client_processing
StringIO(data),
TypeError: initial_value must be str or None, not bytes
172.18.0.6 - - [07/Jul/2026:18:37:46 +0000] "GET /api/v1/chart/252/data/?format=csv&type=post_processed&force=true HTTP/1.1" 500 243 "-" "Python-urllib/3.10"
```
The logs for a successfully executed alert with `text` content type (all other settings are the same):
**Worker**
```
[2026-07-07 18:43:51,618: INFO/MainProcess] Task reports.execute[9256829f-4dbb-4ce3-904c-8faa7e150614] received
[2026-07-07 18:43:51,621: INFO/ForkPoolWorker-1] Executing alert/report, task id: 9256829f-4dbb-4ce3-904c-8faa7e150614, scheduled_dttm: 2026-07-07T18:43:51.573383+00:00
[2026-07-07 18:43:51,621: INFO/ForkPoolWorker-1] session is validated: id 5, executionid: 9256829f-4dbb-4ce3-904c-8faa7e150614
[2026-07-07 18:43:51,891: INFO/ForkPoolWorker-1] Query for 9256829f-4dbb-4ce3-904c-8faa7e150614 took 223.76 ms
[2026-07-07 18:43:52,734: INFO/ForkPoolWorker-1] DataFrame generation from http://superset_app:8088/api/v1/chart/252/data/?format=json&type=post_processed&force=true as user user@example.com took 0.82s - execution_id: 9256829f-4dbb-4ce3-904c-8faa7e150614
[2026-07-07 18:43:55,386: INFO/ForkPoolWorker-1] Report sent to email, task_id: 9256829f-4dbb-4ce3-904c-8faa7e150614, notification content is {'notification_type': 'Alert', 'notification_source': <ReportSourceFormat.CHART: 'chart'>, 'notification_format': 'TEXT', 'chart_id': 252, 'dashboard_id': None, 'owners': [Owner Name], 'slack_channels': [], 'execution_id': '9256829f-4dbb-4ce3-904c-8faa7e150614'}
[2026-07-07 18:43:55,397: INFO/ForkPoolWorker-1] Report execution as user user@example.com completed in 3.77s - execution_id: 9256829f-4dbb-4ce3-904c-8faa7e150614
[2026-07-07 18:43:55,400: INFO/ForkPoolWorker-1] Task reports.execute[9256829f-4dbb-4ce3-904c-8faa7e150614] succeeded in 3.779876146931201s: None
```
**App**
```
1.2.3.4 - - [07/Jul/2026:18:43:47 +0000] "GET /api/v1/report/?q=(filters:!((col:type,opr:eq,value:Alert)),order_column:name,order_direction:desc,page:0,page_size:25) HTTP/1.1" 200 792 "https://superset.example.com/alert/list/?pageIndex=0&sortColumn=name&sortOrder=desc" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.0"
INFO:superset.commands.report.execute_now:Manually executing report schedule <Report_Name> (id: 5), execution_id: 9256829f-4dbb-4ce3-904c-8faa7e150614
DEBUG:superset.stats_logger:[stats_logger] (incr) ReportScheduleRestApi.execute.success
DEBUG:superset.stats_logger:[stats_logger] (timing) ReportScheduleRestApi.execute.time | 55.32274302095175
1.2.3.4 - - [07/Jul/2026:18:43:51 +0000] "POST /api/v1/report/5/execute HTTP/1.1" 200 115 "https://superset.example.com/alert/list/?pageIndex=0&sortColumn=name&sortOrder=desc" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.0"
DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.0.0.103:9030/default_catalog.dmh
DEBUG:superset.common.query_object:QueryObject CACHE KEY generated: 953e778aa323478521eccd8c50b36bafdc0c8060f350bd407f9ebd5ef193fb83 from dict with keys: ['changed_on', 'columns', 'datasource', 'extra_cache_keys', 'extras', 'filter', 'granularity', 'group_others_when_limit_reached', 'inner_from_dttm', 'inner_to_dttm', 'is_rowcount', 'is_timeseries', 'metrics', 'order_desc', 'orderby', 'post_processing', 'result_type', 'rls', 'row_limit', 'row_offset', 'series_columns', 'series_limit', 'series_limit_metric', 'time_compare_full_range', 'time_shift']
```
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Re: [I] Alerts/Reports sending chart as csv fails with HTTP 500 [superset]
Posted by "MatthewCurlerTAC (via GitHub)" <gi...@apache.org>.
MatthewCurlerTAC commented on issue #41862:
URL: https://github.com/apache/superset/issues/41862#issuecomment-5071323643
> I tested the patch by building superset with `SUPERSET_TAG=227b3a4`, corresponding to the merge commit into main. Sending a chart as a csv continues to generate `HTTP Error 500`. I think this issue needs to be reopened.
>
> ### superset logs
> The root error appears to be
>
> ```
> File "/app/superset/charts/client_processing.py", line 354, in apply_client_processing
> StringIO(data),
> TypeError: initial_value must be str or None, not bytes
> ERROR:superset.views.error_handling:initial_value must be str or None, not bytes
> ```
>
> Full logs:
>
> ```
> INFO:superset.commands.report.execute_now:Manually executing report schedule <report_name> (id: 5), execution_id: de233e3c-c39e-44a1-96d4-4738b7af67f3
> DEBUG:celery.utils.functional:
> def execute(self, report_schedule_id):
> return 1
>
> DEBUG:superset.stats_logger:[stats_logger] (incr) ReportScheduleRestApi.execute.success
> DEBUG:superset.stats_logger:[stats_logger] (timing) ReportScheduleRestApi.execute.time | 264.1265047714114
> 1.2.3.4 - - [09/Jul/2026:20:38:17 +0000] "POST /api/v1/report/5/execute HTTP/1.1" 200 115 "https://superset.example.com/alert/list/?pageIndex=0&sortColumn=name&sortOrder=desc" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.0"
> DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.99.88.77:9030/default_catalog.dmh
> DEBUG:starrocks.dialect:connect_args: {'host': '100.99.88.77', 'database': 'default_catalog.dmh', 'user': '<db_user>', 'password': '<db_pass>', 'port': 9030, 'client_flag': 2}
> WARNING:starrocks.dialect:Failed to get run_mode: (pymysql.err.OperationalError) (5203, 'Access denied; you need (at least one of) the OPERATE privilege(s) on SYSTEM for this operation. Please ask the admin to grant permission(s) or try activating existing roles using <set [default] role>. Current role(s): [dmh_ro]. Inactivated role(s): NONE.')
> [SQL: ADMIN SHOW FRONTEND CONFIG LIKE 'run_mode']
> (Background on this error at: https://sqlalche.me/e/14/e3q8)
> DEBUG:starrocks.dialect:system run mode: shared_nothing
> DEBUG:superset.common.query_object:QueryObject CACHE KEY generated: 1be89de227b363f6f2ec6b7f2a774ba814f0f52f07be862e872d9af7f18b028d from dict with keys: ['changed_on', 'columns', 'datasource', 'extra_cache_keys', 'extras', 'filter', 'granularity', 'group_others_when_limit_reached', 'inner_from_dttm', 'inner_to_dttm', 'is_rowcount', 'is_timeseries', 'metrics', 'order_desc', 'orderby', 'post_processing', 'result_type', 'rls', 'row_limit', 'row_offset', 'series_columns', 'series_limit', 'series_limit_metric', 'time_compare_full_range', 'time_shift']
> DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.99.88.77:9030/default_catalog.dmh
> DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.99.88.77:9030/default_catalog.dmh
> DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.99.88.77:9030/default_catalog.dmh
> DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.99.88.77:9030/default_catalog.dmh
> DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.99.88.77:9030/default_catalog.dmh
> DEBUG:superset.stats_logger:[stats_logger] (incr) execute_sql
> DEBUG:superset.stats_logger:[stats_logger] (incr) load_into_dataframe
> DEBUG:superset.common.query_object:post_processing:
> []
> DEBUG:superset.stats_logger:[stats_logger] (incr) QueryObject.post_processing
> DEBUG:superset.stats_logger:[stats_logger] (incr) loaded_from_source
> DEBUG:superset.stats_logger:[stats_logger] (incr) set_cache_key
> DEBUG:superset.utils.cache:CACHE SET - Key: 1be89de227b363f6f2ec6b7f2a774ba814f0f52f07be862e872d9af7f18b028d, Datasource: 85__table, Timeout: 10800
> DEBUG:superset.models.core:Database._get_sqla_engine(). Masked URL: starrocks://<db_user>:XXXXXXXXXX@100.99.88.77:9030/default_catalog.dmh
> DEBUG:superset.stats_logger:[stats_logger] (incr) ChartDataRestApi.data.error
> WARNING:superset.views.error_handling:Exception
> Traceback (most recent call last):
> File "/app/.venv/lib/python3.10/site-packages/flask/app.py", line 1484, in full_dispatch_request
> rv = self.dispatch_request()
> File "/app/.venv/lib/python3.10/site-packages/flask/app.py", line 1469, in dispatch_request
> return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
> File "/app/.venv/lib/python3.10/site-packages/flask_appbuilder/security/decorators.py", line 128, in wraps
> return f(self, *args, **kwargs)
> File "/app/superset/views/base_api.py", line 127, in wraps
> duration, response = time_function(f, self, *args, **kwargs)
> File "/app/superset/utils/core.py", line 1600, in time_function
> response = func(*args, **kwargs)
> File "/app/superset/utils/log.py", line 299, in wrapper
> value = f(*args, add_extra_log_payload=log, **kwargs)
> File "/app/superset/charts/data/api.py", line 353, in data
> return self._get_data_response(
> File "/app/superset/utils/log.py", line 301, in wrapper
> value = f(*args, **kwargs)
> File "/app/superset/charts/data/api.py", line 592, in _get_data_response
> return self._send_chart_response(
> File "/app/superset/charts/data/api.py", line 474, in _send_chart_response
> result = apply_client_processing(result, form_data, datasource)
> File "/app/superset/utils/log.py", line 301, in wrapper
> value = f(*args, **kwargs)
> File "/app/superset/charts/client_processing.py", line 354, in apply_client_processing
> StringIO(data),
> TypeError: initial_value must be str or None, not bytes
> ERROR:superset.views.error_handling:initial_value must be str or None, not bytes
> Traceback (most recent call last):
> File "/app/.venv/lib/python3.10/site-packages/flask/app.py", line 1484, in full_dispatch_request
> rv = self.dispatch_request()
> File "/app/.venv/lib/python3.10/site-packages/flask/app.py", line 1469, in dispatch_request
> return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
> File "/app/.venv/lib/python3.10/site-packages/flask_appbuilder/security/decorators.py", line 128, in wraps
> return f(self, *args, **kwargs)
> File "/app/superset/views/base_api.py", line 127, in wraps
> duration, response = time_function(f, self, *args, **kwargs)
> File "/app/superset/utils/core.py", line 1600, in time_function
> response = func(*args, **kwargs)
> File "/app/superset/utils/log.py", line 299, in wrapper
> value = f(*args, add_extra_log_payload=log, **kwargs)
> File "/app/superset/charts/data/api.py", line 353, in data
> return self._get_data_response(
> File "/app/superset/utils/log.py", line 301, in wrapper
> value = f(*args, **kwargs)
> File "/app/superset/charts/data/api.py", line 592, in _get_data_response
> return self._send_chart_response(
> File "/app/superset/charts/data/api.py", line 474, in _send_chart_response
> result = apply_client_processing(result, form_data, datasource)
> File "/app/superset/utils/log.py", line 301, in wrapper
> value = f(*args, **kwargs)
> File "/app/superset/charts/client_processing.py", line 354, in apply_client_processing
> StringIO(data),
> TypeError: initial_value must be str or None, not bytes
> 172.18.0.5 - - [09/Jul/2026:20:38:20 +0000] "POST /api/v1/chart/data HTTP/1.1" 500 243 "-" "Python-urllib/3.10"
> DEBUG:cron_descriptor.GetText:/app/.venv/lib/python3.10/site-packages/cron_descriptor/locale/en_US.mo Loaded
> DEBUG:superset.stats_logger:[stats_logger] (incr) ReportScheduleRestApi.get_list.success
> DEBUG:superset.stats_logger:[stats_logger] (timing) ReportScheduleRestApi.get_list.time | 74.73946362733841
> 1.2.3.4 - - [09/Jul/2026:20:38:23 +0000] "GET /api/v1/report/?q=(filters:!((col:type,opr:eq,value:Alert)),order_column:name,order_direction:desc,page:0,page_size:25) HTTP/1.1" 200 770 "https://superset.example.com/alert/list/?pageIndex=0&sortColumn=name&sortOrder=desc" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.0"
> DEBUG:superset.stats_logger:[stats_logger] (incr) ReportExecutionLogRestApi.get_list.success
> DEBUG:superset.stats_logger:[stats_logger] (timing) ReportExecutionLogRestApi.get_list.time | 51.861213985830545
> 1.2.3.4 - - [09/Jul/2026:20:38:26 +0000] "GET /api/v1/report/5/log/?q=(order_column:start_dttm,order_direction:desc,page:0,page_size:25) HTTP/1.1" 200 1077 "https://superset.example.com/alert/5/log?pageIndex=0&sortColumn=start_dttm&sortOrder=desc" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.0"
> DEBUG:superset.stats_logger:[stats_logger] (incr) ReportScheduleRestApi.get.success
> DEBUG:superset.stats_logger:[stats_logger] (timing) ReportScheduleRestApi.get.time | 102.88260225206614
> 1.2.3.4 - - [09/Jul/2026:20:38:26 +0000] "GET /api/v1/report/5 HTTP/1.1" 200 1316 "https://superset.example.com/alert/5/log?pageIndex=0&sortColumn=start_dttm&sortOrder=desc" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.0"
> DEBUG:superset.stats_logger:[stats_logger] (incr) log
> 1.2.3.4 - - [09/Jul/2026:20:38:27 +0000] "POST /log/?explode=events HTTP/1.1" 200 1 "https://superset.example.com/alert/5/log?pageIndex=0&sortColumn=start_dttm&sortOrder=desc" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.0"
> DEBUG:superset.stats_logger:[stats_logger] (incr) health
> 127.0.0.1 - - [09/Jul/2026:20:38:39 +0000] "GET //health HTTP/1.1" 200 2 "-" "curl/7.88.1"
> ```
>
> ### worker logs
> These are not particularly useful, but do show the 500 error.
>
> ```
> [2026-07-09 20:38:17,628: INFO/MainProcess] Task reports.execute[de233e3c-c39e-44a1-96d4-4738b7af67f3] received
> [2026-07-09 20:38:17,634: INFO/ForkPoolWorker-1] Executing alert/report, task id: de233e3c-c39e-44a1-96d4-4738b7af67f3, scheduled_dttm: 2026-07-09T20:38:17.402165+00:00
> [2026-07-09 20:38:17,638: INFO/ForkPoolWorker-1] session is validated: id 5, executionid: de233e3c-c39e-44a1-96d4-4738b7af67f3
> [2026-07-09 20:38:18,516: INFO/ForkPoolWorker-1] Query for de233e3c-c39e-44a1-96d4-4738b7af67f3 took 307.95 ms
> [2026-07-09 20:38:20,412: ERROR/ForkPoolWorker-1] CSV generation failed after 1.86s - execution_id: de233e3c-c39e-44a1-96d4-4738b7af67f3
> Traceback (most recent call last):
> File "/app/superset/commands/report/execute.py", line 724, in _get_csv_data
> csv_data = self._post_chart_data(
> File "/app/superset/commands/report/execute.py", line 694, in _post_chart_data
> urllib.request.build_opener().open(request, timeout=timeout) # noqa: S310
> File "/usr/local/lib/python3.10/urllib/request.py", line 525, in open
> response = meth(req, response)
> File "/usr/local/lib/python3.10/urllib/request.py", line 634, in http_response
> response = self.parent.error(
> File "/usr/local/lib/python3.10/urllib/request.py", line 563, in error
> return self._call_chain(*args)
> File "/usr/local/lib/python3.10/urllib/request.py", line 496, in _call_chain
> result = func(*args)
> File "/usr/local/lib/python3.10/urllib/request.py", line 643, in http_error_default
> raise HTTPError(req.full_url, code, msg, hdrs, fp)
> urllib.error.HTTPError: HTTP Error 500: INTERNAL SERVER ERROR
> [2026-07-09 20:38:20,455: INFO/ForkPoolWorker-1] header_data in notifications for alerts and reports {'notification_type': 'Alert', 'notification_source': <ReportSourceFormat.CHART: 'chart'>, 'notification_format': 'CSV', 'chart_id': 274, 'dashboard_id': None, 'editors': [2], 'slack_channels': [], 'execution_id': 'de233e3c-c39e-44a1-96d4-4738b7af67f3'}, taskid, de233e3c-c39e-44a1-96d4-4738b7af67f3
> [2026-07-09 20:38:23,157: INFO/ForkPoolWorker-1] Report sent to email, task_id: None, notification content is None
> [2026-07-09 20:38:23,167: ERROR/ForkPoolWorker-1] A downstream exception occurred while generating a report: de233e3c-c39e-44a1-96d4-4738b7af67f3. Failed generating csv HTTP Error 500: INTERNAL SERVER ERROR
> Traceback (most recent call last):
> File "/app/superset/commands/report/execute.py", line 724, in _get_csv_data
> csv_data = self._post_chart_data(
> File "/app/superset/commands/report/execute.py", line 694, in _post_chart_data
> urllib.request.build_opener().open(request, timeout=timeout) # noqa: S310
> File "/usr/local/lib/python3.10/urllib/request.py", line 525, in open
> response = meth(req, response)
> File "/usr/local/lib/python3.10/urllib/request.py", line 634, in http_response
> response = self.parent.error(
> File "/usr/local/lib/python3.10/urllib/request.py", line 563, in error
> return self._call_chain(*args)
> File "/usr/local/lib/python3.10/urllib/request.py", line 496, in _call_chain
> result = func(*args)
> File "/usr/local/lib/python3.10/urllib/request.py", line 643, in http_error_default
> raise HTTPError(req.full_url, code, msg, hdrs, fp)
> urllib.error.HTTPError: HTTP Error 500: INTERNAL SERVER ERROR
>
> The above exception was the direct cause of the following exception:
>
> Traceback (most recent call last):
> File "/app/superset/tasks/scheduler.py", line 135, in execute
> ).run()
> File "/app/superset/commands/report/execute.py", line 1410, in run
> ).run()
> File "/app/superset/utils/decorators.py", line 267, in wrapped
> return on_error(ex)
> File "/app/superset/utils/decorators.py", line 232, in on_error
> raise ex
> File "/app/superset/utils/decorators.py", line 260, in wrapped
> result = func(*args, **kwargs)
> File "/app/superset/commands/report/execute.py", line 1351, in run
> ).next()
> File "/app/superset/commands/report/execute.py", line 1113, in next
> self.send()
> File "/app/superset/commands/report/execute.py", line 1005, in send
> notification_content = self._get_notification_content()
> File "/app/superset/commands/report/execute.py", line 897, in _get_notification_content
> csv_data = self._get_csv_data()
> File "/app/superset/commands/report/execute.py", line 753, in _get_csv_data
> raise ReportScheduleCsvFailedError(
> superset.commands.report.exceptions.ReportScheduleCsvFailedError: Failed generating csv HTTP Error 500: INTERNAL SERVER ERROR
> [2026-07-09 20:38:23,172: INFO/ForkPoolWorker-1] Task reports.execute[de233e3c-c39e-44a1-96d4-4738b7af67f3] succeeded in 5.538199000991881s: None
> ```
@durgaprasadml, @rusackas - I was trying to avoid unnecessarily tagging you, but think it's important to call your attention to the fact that the MR closing this issue did not fix the problem.
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Re: [I] Alerts/Reports sending chart as csv fails with HTTP 500 [superset]
Posted by "hainenber (via GitHub)" <gi...@apache.org>.
hainenber closed issue #41862: Alerts/Reports sending chart as csv fails with HTTP 500
URL: https://github.com/apache/superset/issues/41862
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Re: [I] Alerts/Reports sending chart as csv fails with HTTP 500 [superset]
Posted by "rusackas (via GitHub)" <gi...@apache.org>.
rusackas commented on issue #41862:
URL: https://github.com/apache/superset/issues/41862#issuecomment-4917263846
Removing @nosumano20's attachment... it's a `.exe` file, and nobody should be opening something that risky.
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