shunping opened a new issue, #36128:
URL: https://github.com/apache/beam/issues/36128
### What happened?
Running the following code, we can see that the logging of the early pane
and and on-time pane appear on the terminal at the same time.
The expected behavior should be for each window, the early pane is logged
first and then after about 8 seconds (i.e. 10-2) the on-time pane is logged.
```
import apache_beam as beam
from apache_beam.options.pipeline_options import PipelineOptions
from apache_beam.transforms.window import FixedWindows
from apache_beam.transforms import trigger
from apache_beam.transforms.periodicsequence import PeriodicImpulse,
RebaseMode
from apache_beam.utils.timestamp import Timestamp
# prism runner option
options = PipelineOptions([
"--streaming",
"--environment_type=LOOPBACK",
"--runner=PrismRunner",
"--experiments=prism_enable_rtc",
"--prism_log_level=info",
"--allow_unsafe_triggers",
])
# Output PCollection
class Output(beam.PTransform):
class _OutputFn(beam.DoFn):
def __init__(self, prefix=''):
super().__init__()
self.prefix = prefix
def process(self, element):
print(self.prefix + str(element))
def __init__(self, label=None, prefix=''):
super().__init__(label)
self.prefix = prefix
def expand(self, input):
input | beam.ParDo(self._OutputFn(self.prefix))
with beam.Pipeline(options=options) as p:
_ = (
p | PeriodicImpulse(
start_timestamp=Timestamp.now(),
stop_timestamp=Timestamp.now() + 20,
fire_interval=1,
rebase=RebaseMode.REBASE_ALL)
| 'window' >> beam.WindowInto(
FixedWindows(6),
trigger=trigger.AfterCount(2),
accumulation_mode=trigger.AccumulationMode.DISCARDING)
| beam.GroupBy()
| beam.LogElements(
with_timestamp=True, with_window=True, with_pane_info=True))
```
### Issue Priority
Priority: 2 (default / most bugs should be filed as P2)
### Issue Components
- [ ] Component: Python SDK
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