tvalentyn commented on code in PR #36737:
URL: https://github.com/apache/beam/pull/36737#discussion_r2500734441


##########
sdks/python/apache_beam/runners/worker/operations.py:
##########
@@ -808,8 +816,15 @@ def __init__(
     self.user_state_context = user_state_context
     self.tagged_receivers = None  # type: Optional[_TaggedReceivers]
     # A mapping of timer tags to the input "PCollections" they come in on.
+    # Force clean rebuild
     self.input_info = None  # type: Optional[OpInputInfo]
-
+    self.scoped_timer_processing_state = statesampler.NOOP_SCOPED_STATE
+    if self.state_sampler:
+      self.scoped_timer_processing_state = self.state_sampler.scoped_state(
+          self.name_context,
+          'process-timers',
+          metrics_container=self.metrics_container,
+          suffix="-millis")

Review Comment:
   are other counters / in other sdks reported with millis precision? if not 
wondering if we should be sticking with mscec for constitency. 



##########
sdks/python/apache_beam/runners/worker/operations.py:
##########
@@ -444,12 +445,19 @@ def __init__(
     self.metrics_container = MetricsContainer(self.name_context.metrics_name())
 
     self.state_sampler = state_sampler
-    self.scoped_start_state = self.state_sampler.scoped_state(
-        self.name_context, 'start', metrics_container=self.metrics_container)
-    self.scoped_process_state = self.state_sampler.scoped_state(
-        self.name_context, 'process', metrics_container=self.metrics_container)
-    self.scoped_finish_state = self.state_sampler.scoped_state(
-        self.name_context, 'finish', metrics_container=self.metrics_container)
+    if self.state_sampler:

Review Comment:
   for my understanding, when do we have the case where state_sampler is None / 
not available?
   Trying to understand what prompted to add Noop state sampler with this 
particular change.



##########
sdks/python/apache_beam/runners/worker/statesampler_test.py:
##########
@@ -127,6 +127,41 @@ def test_sampler_transition_overhead(self):
     # debug mode).
     self.assertLess(overhead_us, 20.0)
 
+  @retry(reraise=True, stop=stop_after_attempt(3))

Review Comment:
   does this test exercise any of the codepaths that you've touched? 



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