Added possibility not to forward _make_packet errors (#187)

Signed-off-by: Victor Gavro <vgavro@gmail.com>
Co-authored-by: Inada Naoki <songofacandy@gmail.com>

fluent/sender.py

@@ -52,6 +52,8 @@ def __init__(
         buffer_overflow_handler=None,
         nanosecond_precision=False,
         msgpack_kwargs=None,
+        *,
+        forward_packet_error=True,
         **kwargs,
     ):
         """
@@ -65,6 +67,7 @@ def __init__(
         self.verbose = verbose
         self.buffer_overflow_handler = buffer_overflow_handler
         self.nanosecond_precision = nanosecond_precision
+        self.forward_packet_error = forward_packet_error
         self.msgpack_kwargs = {} if msgpack_kwargs is None else msgpack_kwargs
 
         self.socket = None
@@ -81,11 +84,11 @@ def emit(self, label, data):
         return self.emit_with_time(label, cur_time, data)
 
     def emit_with_time(self, label, timestamp, data):
-        if self.nanosecond_precision and isinstance(timestamp, float):
-            timestamp = EventTime(timestamp)
         try:
             bytes_ = self._make_packet(label, timestamp, data)
         except Exception as e:
+            if not self.forward_packet_error:
+                raise
             self.last_error = e
             bytes_ = self._make_packet(
                 label,
@@ -129,6 +132,8 @@ def _make_packet(self, label, timestamp, data):
             tag = ".".join((self.tag, label)) if self.tag else label
         else:
             tag = self.tag
+        if self.nanosecond_precision and isinstance(timestamp, float):
+            timestamp = EventTime(timestamp)
         packet = (tag, timestamp, data)
         if self.verbose:
             print(packet)