AttributeError: 'NoneType' object has no attribute 'tell'

I’m using 4.0.1 version. Exceptions are raised from elasticapm.transport.base.queued_data_size

Here is last trace.

        if f:
            # return size of the underlying BytesIO object if it is compressed
            return f.fileobj.tell() if hasattr(f, "fileobj") else f.tell()
        return 0

[beniwohli]

@rafaelsierra can you open a new issue with this? As far as I can tell, this seems unrelated.

[axw]

GzipFile.fileobj will be set to None when the GzipFile is closed, which is done by Transport.flush. I suspect that the flush timer thread is kicking in between self.queued_data.write and queue_size = self.queued_data_size inside Transport.queue.

I think if you move queue_size = self.queued_data_size up inside the with self._queue_lock this can be avoided. The Transport.queue_data_size property method should probably also account for fileobj possibly being None.