Error cbbackup 'NoneType' object has no attribute 'error'

Hi, I have a big bucket and when I try to make a backup I receive this error:

[################### ] 96.3% (326192200/estimated 338729321 msgs)
bucket: bigData, msgs transferred…
: total | last | per sec
byte : 520080238875 | 520080238875 | 11840706.3
done
Exception in thread Thread-4 (most likely raised during interpreter shutdown):
Traceback (most recent call last):
File “/usr/lib/python2.7/threading.py”, line 801, in __bootstrap_inner
File “/opt/couchbase/lib/python/pump_dcp.py”, line 608, in run
<type ‘exceptions.AttributeError’>: ‘NoneType’ object has no attribute ‘error’

How can I solve the error?

Thanks,
Jacopo

Hi Jacopo,
Thanks for using our product.
I have some questions to ask you to get more information about your issue.
What is the operation system that you are running Couchbase Server? I see it is linux but what is the os name?
What Couchbase Server version you install in the server? What size of bucket quota and does its resident ratio 100% or lower?
Thanks