| from typing import Optional, Set
|
| import grpc
|
| from tenacity import retry, stop_after_attempt, wait_exponential_jitter, retry_if_result
|
| from opentelemetry.trace import Span
|
|
|
|
|
| class RetryOnRpcErrorClientInterceptor(
|
| grpc.UnaryUnaryClientInterceptor, grpc.UnaryStreamClientInterceptor
|
| ):
|
| """
|
| A gRPC client interceptor that retries RPCs on specific status codes. By default, it retries on UNAVAILABLE and UNKNOWN status codes.
|
|
|
| This interceptor should be placed after the OpenTelemetry interceptor in the interceptor list.
|
| """
|
|
|
| max_attempts: int
|
| retryable_status_codes: Set[grpc.StatusCode]
|
|
|
| def __init__(
|
| self,
|
| max_attempts: int = 5,
|
| retryable_status_codes: Set[grpc.StatusCode] = set(
|
| [grpc.StatusCode.UNAVAILABLE, grpc.StatusCode.UNKNOWN]
|
| ),
|
| ) -> None:
|
| self.max_attempts = max_attempts
|
| self.retryable_status_codes = retryable_status_codes
|
|
|
| def _intercept_call(self, continuation, client_call_details, request_or_iterator):
|
| sleep_span: Optional[Span] = None
|
|
|
| def before_sleep(_):
|
| from chromadb.telemetry.opentelemetry import tracer
|
|
|
| nonlocal sleep_span
|
| if tracer is not None:
|
| sleep_span = tracer.start_span("Waiting to retry RPC")
|
|
|
| @retry(
|
| wait=wait_exponential_jitter(0.1, jitter=0.1),
|
| stop=stop_after_attempt(self.max_attempts),
|
| retry=retry_if_result(lambda x: x.code() in self.retryable_status_codes),
|
| before_sleep=before_sleep,
|
| )
|
| def wrapped(*args, **kwargs):
|
| nonlocal sleep_span
|
| if sleep_span is not None:
|
| sleep_span.end()
|
| sleep_span = None
|
| return continuation(*args, **kwargs)
|
|
|
| return wrapped(client_call_details, request_or_iterator)
|
|
|
| def intercept_unary_unary(self, continuation, client_call_details, request):
|
| return self._intercept_call(continuation, client_call_details, request)
|
|
|
| def intercept_unary_stream(self, continuation, client_call_details, request):
|
| return self._intercept_call(continuation, client_call_details, request)
|
|
|
| def intercept_stream_unary(
|
| self, continuation, client_call_details, request_iterator
|
| ):
|
| return self._intercept_call(continuation, client_call_details, request_iterator)
|
|
|
| def intercept_stream_stream(
|
| self, continuation, client_call_details, request_iterator
|
| ):
|
| return self._intercept_call(continuation, client_call_details, request_iterator)
|
|
|
