Intermittent:CBQError: host 172.23.121.127: ERROR:{u\'status\': u\'stopped\', u\'errors\': [{u\'msg\': u\'Panic: send on closed channel\', u\'code\': 5001}]

Test which fails:
./testrunner -i /tmp/n1ql_set1.ini gsi_type=forestdb,primary_indx_type=GSI,doc-per-day=6,standard_buckets=1 -t tuqquery.tuq_dml.DMLQueryTests.test_merge_delete_match_limit,skip_load=True

Error thrown:
======================================================================
ERROR: test_merge_delete_match_limit (tuqquery.tuq_dml.DMLQueryTests)
----------------------------------------------------------------------
Traceback (most recent call last):
File "pytests/tuqquery/tuq_dml.py", line 887, in test_merge_delete_match_limit
actual_result = self.run_cbq_query()
File "pytests/tuqquery/tuq.py", line 3361, in run_cbq_query
raise CBQError(result, server.ip)
CBQError: CBQError: host 172.23.121.127: ERROR:{u'status': u'stopped', u'errors': [

{u'msg': u'Panic: send on closed channel', u'code': 5001}

], u'results': [], u'metrics':

{u'elapsedTime': u'51.99891ms', u'executionTime': u'51.908062ms', u'resultSize': 0, u'resultCount': 0, u'errorCount': 1}

, u'requestID': u'bdb73426-dbed-4be2-b606-d93b49400be8', u'signature': None}

Attaching logs from vm.