Sending Luigi failure to Sentry

gistfile1.py

import os
import sys
import luigi
from raven import Client

client = Client()

# Define your Luigi tasks here

@luigi.Task.event_handler(luigi.Event.FAILURE)
def send_failure_to_sentry(task, exception):
    client.captureException(exc_info=sys.exc_info(),
                            extra={
                                "os_pid": os.getpid(),
                                "task": {
                                    "id": task.task_id,
                                    "family": task.task_family
                                },
                                "param": {
                                    "args": task.param_args,
                                    "kwargs": task.param_kwargs
                                }
                            },
                            culprit=task)

Any ideas how to capture exception from hadoop map-reduce tasks?
I can use decorator for every mapper or reducer. I am looking for simpler way.