[XDCR] panic found in bixdcr job

./testrunner -i INI_FILE.ini get-cbcollect-info=True,get-coredumps=True,get-logs=False,stop-on-failure=False,get-coredumps=True,fail_on_errors=1,GROUP=ALL -t xdcr.biXDCR.bidirectional.load_with_failover,replicas=1,items=20000,ctopology=chain,rdirection=bidirection,update=C1-C2,delete=C1,failover=C2-C1,GROUP=P1

[2017-01-16 05:02:28,197] - [remote_util:2515] INFO - running command.raw on 172.23.105.212: zgrep -A 40 'panic:' "/opt/couchbase/var/lib/couchbase/logs"/goxdcr.log*
[2017-01-16 05:02:28,316] - [remote_util:2552] INFO - command executed successfully
[2017-01-16 05:02:28,316] - [xdcrnewbasetests:3147] INFO - panic: send on closed channel
[2017-01-16 05:02:28,317] - [xdcrnewbasetests:3147] INFO -
[2017-01-16 05:02:28,317] - [xdcrnewbasetests:3147] INFO - goroutine 3884 [running]:
[2017-01-16 05:02:28,317] - [xdcrnewbasetests:3147] INFO - runtime.gopanic(0x8fefc0, 0xc8209b06d0)
[2017-01-16 05:02:28,317] - [xdcrnewbasetests:3147] INFO - /home/couchbase/.cbdepscache/exploded/x86_64/go-1.5.2/go/src/runtime/panic.go:461 +0x3e6 fp=0xc8208c39f8 sp=0xc8208c3978
[2017-01-16 05:02:28,318] - [xdcrnewbasetests:3147] INFO - runtime.chansend(0x8ea8c0, 0xc82038fda0, 0xc8208c3b40, 0xa68901, 0x5babdf, 0xc820abb480)
[2017-01-16 05:02:28,318] - [xdcrnewbasetests:3147] INFO - /home/couchbase/.cbdepscache/exploded/x86_64/go-1.5.2/go/src/runtime/chan.go:155 +0x1b4 fp=0xc8208c3ac8 sp=0xc8208c39f8
[2017-01-16 05:02:28,318] - [xdcrnewbasetests:3147] INFO - runtime.chansend1(0x8ea8c0, 0xc82038fda0, 0xc8208c3b40)
[2017-01-16 05:02:28,318] - [xdcrnewbasetests:3147] INFO - /home/couchbase/.cbdepscache/exploded/x86_64/go-1.5.2/go/src/runtime/chan.go:92 +0x43 fp=0xc8208c3b00 sp=0xc8208c3ac8
[2017-01-16 05:02:28,318] - [xdcrnewbasetests:3147] INFO - github.com/couchbase/gomemcached/client.(*UprFeed).CloseStream(0xc82016efc0, 0x6fcd0000, 0x0, 0x0)
[2017-01-16 05:02:28,319] - [xdcrnewbasetests:3147] INFO - /home/couchbase/jenkins/workspace/couchbase-server-unix/godeps/src/github.com/couchbase/gomemcached/client/upr_feed.go:377 +0x38f fp=0xc8208c3b98 sp=0xc8208c3b00
[2017-01-16 05:02:28,319] - [xdcrnewbasetests:3147] INFO - github.com/couchbase/goxdcr/parts.(*DcpNozzle).closeUprStreams(0xc8202fa340, 0x0, 0x0)
[2017-01-16 05:02:28,319] - [xdcrnewbasetests:3147] INFO - /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/parts/dcp_nozzle.go:334 +0x418 fp=0xc8208c3df0 sp=0xc8208c3b98
[2017-01-16 05:02:28,319] - [xdcrnewbasetests:3147] INFO - github.com/couchbase/goxdcr/parts.(*DcpNozzle).Stop(0xc8202fa340, 0x0, 0x0)
[2017-01-16 05:02:28,319] - [xdcrnewbasetests:3147] INFO - /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/parts/dcp_nozzle.go:305 +0x204 fp=0xc8208c3f10 sp=0xc8208c3df0
[2017-01-16 05:02:28,319] - [xdcrnewbasetests:3147] INFO - github.com/couchbase/goxdcr/common.(Part).Stop-fm(0x0, 0x0)
[2017-01-16 05:02:28,319] - [xdcrnewbasetests:3147] INFO - /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/pipeline/generic_pipeline.go:303 +0x40 fp=0xc8208c3f40 sp=0xc8208c3f10
[2017-01-16 05:02:28,320] - [xdcrnewbasetests:3147] INFO - github.com/couchbase/goxdcr/simple_utils.ExecWithTimeout.func1(0xc8205d2ac0, 0xc8203d73e0)
[2017-01-16 05:02:28,320] - [xdcrnewbasetests:3147] INFO - /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/simple_utils/simple_utils.go:43 +0x1d fp=0xc8208c3f80 sp=0xc8208c3f40
[2017-01-16 05:02:28,320] - [xdcrnewbasetests:3147] INFO - runtime.goexit()
[2017-01-16 05:02:28,320] - [xdcrnewbasetests:3147] INFO - /home/couchbase/.cbdepscache/exploded/x86_64/go-1.5.2/go/src/runtime/asm_amd64.s:1721 +0x1 fp=0xc8208c3f88 sp=0xc8208c3f80
[2017-01-16 05:02:28,320] - [xdcrnewbasetests:3147] INFO - created by github.com/couchbase/goxdcr/simple_utils.ExecWithTimeout
[2017-01-16 05:02:28,320] - [xdcrnewbasetests:3147] INFO - /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/simple_utils/simple_utils.go:45 +0x7e
[2017-01-16 05:02:28,320] - [xdcrnewbasetests:3147] INFO -
[2017-01-16 05:02:28,320] - [xdcrnewbasetests:3147] INFO - goroutine 1 [chan receive]:
[2017-01-16 05:02:28,321] - [xdcrnewbasetests:3147] INFO - runtime.gopark(0xbe8560, 0xc82015a178, 0xac6d50, 0xc, 0x17, 0x3)
[2017-01-16 05:02:28,321] - [xdcrnewbasetests:3147] INFO - /home/couchbase/.cbdepscache/exploded/x86_64/go-1.5.2/go/src/runtime/proc.go:185 +0x163 fp=0xc8203e9a88 sp=0xc8203e9a60
[2017-01-16 05:02:28,321] - [xdcrnewbasetests:3147] INFO - runtime.goparkunlock(0xc82015a178, 0xac6d50, 0xc, 0xc82015d317, 0x3)
[2017-01-16 05:02:28,321] - [xdcrnewbasetests:3147] INFO - /home/couchbase/.cbdepscache/exploded/x86_64/go-1.5.2/go/src/runtime/proc.go:191 +0x54 fp=0xc8203e9ac0 sp=0xc8203e9a88
[2017-01-16 05:02:28,321] - [xdcrnewbasetests:3147] INFO - runtime.chanrecv(0x8eada0, 0xc82015a120, 0x0, 0x1, 0x7f070e7d0000)
[2017-01-16 05:02:28,321] - [xdcrnewbasetests:3147] INFO - /home/couchbase/.cbdepscache/exploded/x86_64/go-1.5.2/go/src/runtime/chan.go:448 +0x472 fp=0xc8203e9b80 sp=0xc8203e9ac0
[2017-01-16 05:02:28,321] - [xdcrnewbasetests:3147] INFO - runtime.chanrecv1(0x8eada0, 0xc82015a120, 0x0)
[2017-01-16 05:02:28,321] - [xdcrnewbasetests:3147] INFO - /home/couchbase/.cbdepscache/exploded/x86_64/go-1.5.2/go/src/runtime/chan.go:349 +0x2b fp=0xc8203e9bb0 sp=0xc8203e9b80
[2017-01-16 05:02:28,321] - [xdcrnewbasetests:3147] INFO - main.main()
[2017-01-16 05:02:28,321] - [xdcrnewbasetests:3147] INFO - /home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/goxdcr/main/main.go:172 +0x1c23 fp=0xc8203e9f60 sp=0xc8203e9bb0
[2017-01-16 05:02:28,321] - [xdcrnewbasetests:3147] INFO - runtime.main()
[2017-01-16 05:02:28,321] - [xdcrnewbasetests:3147] INFO - /home/couchbase/.cbdepscache/exploded/x86_64/go-1.5.2/go/src/runtime/proc.go:111 +0x2b0 fp=0xc8203e9fb0 sp=0xc8203e9f60
[2017-01-16 05:02:28,322] - [xdcrnewbasetests:3147] INFO - runtime.goexit()
[2017-01-16 05:02:28,322] - [xdcrnewbasetests:3147] INFO - /home/couchbase/.cbdepscache/exploded/x86_64/go-1.5.2/go/src/runtime/asm_amd64.s:1721 +0x1 fp=0xc8203e9fb8 sp=0xc8203e9fb0
[2017-01-16 05:02:28,322] - [xdcrnewbasetests:3147] INFO -
[2017-01-16 05:02:28,322] - [xdcrnewbasetests:3147] INFO - goroutine 17 [syscall, locked to thread]:
[2017-01-16 05:02:28,420] - [remote_util:181] INFO - connecting to 172.23.105.212 with username:root password:couchbase ssh_key: