Fix lints

6 files changed, 29 insertions, 35 deletions

diff --git a/synapse/api/auth.py b/synapse/api/auth.py
index 85dd71aac2..aa4ad9a506 100644
--- a/synapse/api/auth.py
+++ b/synapse/api/auth.py
@@ -30,12 +30,7 @@ from synapse.api.errors import (
 from synapse.appservice import ApplicationService
 from synapse.http import get_request_user_agent
 from synapse.http.site import SynapseRequest
-from synapse.logging.tracing import (
-    force_tracing,
-    get_active_span,
-    start_active_span,
-    SynapseTags,
-)
+from synapse.logging.tracing import force_tracing, get_active_span, start_active_span
 from synapse.storage.databases.main.registration import TokenLookupResult
 from synapse.types import Requester, UserID, create_requester
 
diff --git a/synapse/http/server.py b/synapse/http/server.py
index c12028c921..5b94e159d6 100644
--- a/synapse/http/server.py
+++ b/synapse/http/server.py
@@ -868,7 +868,7 @@ async def _async_write_json_to_request_in_thread(
     expensive.
     """
 
-    def encode(tracing_span: Optional["opentelemetry.trace.span.Span"]) -> bytes:
+    def encode(tracing_span: Optional["opentelemetry.trace.Span"]) -> bytes:
         # it might take a while for the threadpool to schedule us, so we write
         # opentracing logs once we actually get scheduled, so that we can see how
         # much that contributed.
diff --git a/synapse/http/site.py b/synapse/http/site.py
index bca7fba471..a82c23174a 100644
--- a/synapse/http/site.py
+++ b/synapse/http/site.py
@@ -87,7 +87,7 @@ class SynapseRequest(Request):
 
         # An opentracing span for this request. Will be closed when the request is
         # completely processed.
-        self._tracing_span: Optional["opentelemetry.trace.span.Span"] = None
+        self._tracing_span: Optional["opentelemetry.trace.Span"] = None
 
         # we can't yet create the logcontext, as we don't know the method.
         self.logcontext: Optional[LoggingContext] = None
@@ -164,7 +164,7 @@ class SynapseRequest(Request):
         # If there's no authenticated entity, it was the requester.
         self.logcontext.request.authenticated_entity = authenticated_entity or requester
 
-    def set_tracing_span(self, span: "opentelemetry.trace.span.Span") -> None:
+    def set_tracing_span(self, span: "opentelemetry.trace.Span") -> None:
         """attach an opentracing span to this request
 
         Doing so will cause the span to be closed when we finish processing the request
diff --git a/synapse/logging/tracing.py b/synapse/logging/tracing.py
index 734e94f6e0..cee4a9f36c 100644
--- a/synapse/logging/tracing.py
+++ b/synapse/logging/tracing.py
@@ -163,7 +163,6 @@ Gotchas
   with an active span?
 """
 import contextlib
-import enum
 import inspect
 import logging
 import re
@@ -299,12 +298,6 @@ _homeserver_whitelist: Optional[Pattern[str]] = None
 # Util methods
 
 
-class _Sentinel(enum.Enum):
-    # defining a sentinel in this way allows mypy to correctly handle the
-    # type of a dictionary lookup.
-    sentinel = object()
-
-
 P = ParamSpec("P")
 R = TypeVar("R")
 
@@ -405,6 +398,13 @@ def init_tracer(hs: "HomeServer") -> None:
         }
     )
 
+    # TODO: `force_tracing_for_users` is not compatible with OTEL samplers
+    # because you can only determine `opentelemetry.trace.TraceFlags.SAMPLED`
+    # and whether it uses a recording span when the span is created and we don't
+    # have enough information at that time (we can determine in
+    # `synapse/api/auth.py`). There isn't a way to change the trace flags after
+    # the fact so there is no way to programmatically force
+    # recording/tracing/sampling like there was in opentracing.
     sampler = opentelemetry.sdk.trace.sampling.ParentBasedTraceIdRatio(
         hs.config.tracing.sample_rate
     )
@@ -465,16 +465,16 @@ def whitelisted_homeserver(destination: str) -> bool:
 
 
 def use_span(
-    span: "opentelemetry.trace.span.Span",
+    span: "opentelemetry.trace.Span",
     end_on_exit: bool = True,
-) -> ContextManager["opentelemetry.trace.span.Span"]:
+) -> ContextManager["opentelemetry.trace.Span"]:
     if opentelemetry is None:
         return contextlib.nullcontext()  # type: ignore[unreachable]
 
     return opentelemetry.trace.use_span(span=span, end_on_exit=end_on_exit)
 
 
-def create_non_recording_span() -> "opentelemetry.trace.span.Span":
+def create_non_recording_span() -> "opentelemetry.trace.Span":
     """Create a no-op span that does not record or become part of a recorded trace"""
 
     return opentelemetry.trace.NonRecordingSpan(
@@ -495,7 +495,7 @@ def start_span(
     end_on_exit: bool = True,
     # For testing only
     tracer: Optional["opentelemetry.trace.Tracer"] = None,
-) -> "opentelemetry.trace.span.Span":
+) -> "opentelemetry.trace.Span":
     if opentelemetry is None:
         raise Exception("Not able to create span without opentelemetry installed.")
 
@@ -532,7 +532,7 @@ def start_active_span(
     end_on_exit: bool = True,
     # For testing only
     tracer: Optional["opentelemetry.trace.Tracer"] = None,
-) -> ContextManager["opentelemetry.trace.span.Span"]:
+) -> ContextManager["opentelemetry.trace.Span"]:
     if opentelemetry is None:
         return contextlib.nullcontext()  # type: ignore[unreachable]
 
@@ -566,7 +566,7 @@ def start_active_span_from_edu(
     operation_name: str,
     *,
     edu_content: Dict[str, Any],
-) -> ContextManager["opentelemetry.trace.span.Span"]:
+) -> ContextManager["opentelemetry.trace.Span"]:
     """
     Extracts a span context from an edu and uses it to start a new active span
 
@@ -589,14 +589,14 @@ def start_active_span_from_edu(
 
 # OpenTelemetry setters for attributes, logs, etc
 @only_if_tracing
-def get_active_span() -> Optional["opentelemetry.trace.span.Span"]:
+def get_active_span() -> Optional["opentelemetry.trace.Span"]:
     """Get the currently active span, if any"""
     return opentelemetry.trace.get_current_span()
 
 
 def get_span_context_from_context(
     context: "opentelemetry.context.context.Context",
-) -> Optional["opentelemetry.trace.span.SpanContext"]:
+) -> Optional["opentelemetry.trace.SpanContext"]:
     """Utility function to convert a `Context` to a `SpanContext`
 
     Based on https://github.com/open-telemetry/opentelemetry-python/blob/43288ca9a36144668797c11ca2654836ec8b5e99/opentelemetry-api/src/opentelemetry/trace/propagation/tracecontext.py#L99-L102
@@ -609,7 +609,7 @@ def get_span_context_from_context(
 
 
 def get_context_from_span(
-    span: "opentelemetry.trace.span.Span",
+    span: "opentelemetry.trace.Span",
 ) -> "opentelemetry.context.context.Context":
     # This doesn't affect the current context at all, it just converts a span
     # into `Context` object basically (bad name).
@@ -650,7 +650,7 @@ def log_kv(key_values: Dict[str, Any], timestamp: Optional[int] = None) -> None:
 
 
 @only_if_tracing
-def force_tracing(span: Optional["opentelemetry.trace.span.Span"] = None) -> None:
+def force_tracing(span: Optional["opentelemetry.trace.Span"] = None) -> None:
     """Force sampling for the active/given span and its children.
 
     Args:
@@ -661,7 +661,7 @@ def force_tracing(span: Optional["opentelemetry.trace.span.Span"] = None) -> Non
 
 
 def is_context_forced_tracing(
-    span_context: Optional["opentelemetry.shim.opentracing_shim.SpanContextShim"],
+    context: "opentelemetry.context.context.Context",
 ) -> bool:
     """Check if sampling has been force for the given span context."""
     # TODO
@@ -942,6 +942,7 @@ def trace_servlet(
             # with JsonResource).
             span.update_name(request.request_metrics.name)
 
-            span.set_attribute(
-                SynapseTags.REQUEST_TAG, request.request_metrics.start_context.tag
-            )
+            if request.request_metrics.start_context.tag is not None:
+                span.set_attribute(
+                    SynapseTags.REQUEST_TAG, request.request_metrics.start_context.tag
+                )
diff --git a/synapse/storage/controllers/persist_events.py b/synapse/storage/controllers/persist_events.py
index 756a73be2e..0c379814c3 100644
--- a/synapse/storage/controllers/persist_events.py
+++ b/synapse/storage/controllers/persist_events.py
@@ -273,8 +273,6 @@ class _EventPeristenceQueue(Generic[_PersistResult]):
                                 Link(span_context)
                                 for span_context in item.parent_tracing_span_contexts
                             ],
-                            # TODO: inherit_force_tracing
-                            inherit_force_tracing=True,
                         ) as span:
                             if span:
                                 item.tracing_span_context = span.get_span_context()
diff --git a/synapse/util/caches/response_cache.py b/synapse/util/caches/response_cache.py
index 3ea48a8551..1dd2d3e62e 100644
--- a/synapse/util/caches/response_cache.py
+++ b/synapse/util/caches/response_cache.py
@@ -78,7 +78,7 @@ class ResponseCacheEntry:
     easier to cache Failure results.
     """
 
-    tracing_span_context: Optional["opentelemetry.trace.span.SpanContext"]
+    tracing_span_context: Optional["opentelemetry.trace.SpanContext"]
     """The tracing span which generated/is generating the result"""
 
 
@@ -137,7 +137,7 @@ class ResponseCache(Generic[KV]):
         self,
         context: ResponseCacheContext[KV],
         deferred: "defer.Deferred[RV]",
-        tracing_span_context: Optional["opentelemetry.trace.span.SpanContext"],
+        tracing_span_context: Optional["opentelemetry.trace.SpanContext"],
     ) -> ResponseCacheEntry:
         """Set the entry for the given key to the given deferred.
 
@@ -230,7 +230,7 @@ class ResponseCache(Generic[KV]):
             if cache_context:
                 kwargs["cache_context"] = context
 
-            span_context: Optional["opentelemetry.trace.span.SpanContext"] = None
+            span_context: Optional["opentelemetry.trace.SpanContext"] = None
 
             async def cb() -> RV:
                 # NB it is important that we do not `await` before setting span_context!