Release the GIL when calling grpc_call_start_batch.
diff --git a/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi b/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi
index 0892215..2e02111 100644
--- a/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi
+++ b/src/python/grpcio/grpc/_cython/_cygrpc/call.pyx.pxi
@@ -30,9 +30,12 @@
tag, operations, self if retain_self else None)
batch_operation_tag.prepare()
cpython.Py_INCREF(batch_operation_tag)
- return grpc_call_start_batch(
+ cdef grpc_call_error error
+ with nogil:
+ error = grpc_call_start_batch(
self.c_call, batch_operation_tag.c_ops, batch_operation_tag.c_nops,
<cpython.PyObject *>batch_operation_tag, NULL)
+ return error
def start_client_batch(self, operations, tag):
# We don't reference this call in the operations tag because