panic found in fts - ubuntu longevity

panic: send on closed channel

goroutine 12 [running]:

panic(0xbf6540, 0xc430217d10)

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/panic.go:531 +0x1cf fp=0xc43c55fe18 sp=0xc43c55fd80

runtime.chansend(0xba8920, 0xc42208c240, 0xc43c55ff30, 0x1, 0x88d627, 0x0)

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/chan.go:180 +0x8f1 fp=0xc43c55fec8 sp=0xc43c55fe18

runtime.chansend1(0xba8920, 0xc42208c240, 0xc43c55ff30)

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/chan.go:113 +0x4d fp=0xc43c55ff08 sp=0xc43c55fec8

github.com/blevesearch/bleve/index.AnalysisWorker(0xc42007e960, 0xc42007e9c0)

	/home/couchbase/jenkins/workspace/couchbase-server-unix/godeps/src/github.com/blevesearch/bleve/index/analysis.go:80 +0x127 fp=0xc43c55ffd0 sp=0xc43c55ff08

runtime.goexit()

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/asm_amd64.s:2197 +0x1 fp=0xc43c55ffd8 sp=0xc43c55ffd0

created by github.com/blevesearch/bleve/index.NewAnalysisQueue

	/home/couchbase/jenkins/workspace/couchbase-server-unix/godeps/src/github.com/blevesearch/bleve/index/analysis.go:67 +0xdf

goroutine 1 [chan receive, 4425 minutes]:

runtime.gopark(0xd21c68, 0xc420137618, 0xcf107f, 0xc, 0xc420137517, 0x3)

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/proc.go:271 +0x13a fp=0xc420325b68 sp=0xc420325b38

runtime.goparkunlock(0xc420137618, 0xcf107f, 0xc, 0x17, 0x3)

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/proc.go:277 +0x5e fp=0xc420325ba8 sp=0xc420325b68

runtime.chanrecv(0xba99e0, 0xc4201375c0, 0x0, 0x7ffd23929501, 0xc)

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/chan.go:513 +0x371 fp=0xc420325c48 sp=0xc420325ba8

runtime.chanrecv1(0xba99e0, 0xc4201375c0, 0x0)

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/chan.go:395 +0x35 fp=0xc420325c80 sp=0xc420325c48

main.main()

	/home/couchbase/jenkins/workspace/couchbase-server-unix/goproj/src/github.com/couchbase/cbft/cmd/cbft/main.go:226 +0x111b fp=0xc420325f88 sp=0xc420325c80

runtime.main()

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/proc.go:185 +0x20a fp=0xc420325fe0 sp=0xc420325f88

runtime.goexit()

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/asm_amd64.s:2197 +0x1 fp=0xc420325fe8 sp=0xc420325fe0

goroutine 17 [syscall, 4425 minutes, locked to thread]:

runtime.goexit()

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/asm_amd64.s:2197 +0x1 fp=0xc42004afe8 sp=0xc42004afe0

goroutine 2 [force gc (idle), 4412 minutes]:

runtime.gopark(0xd21c68, 0x1274910, 0xcf395c, 0xf, 0x62112c9b0b1b14, 0x1)

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/proc.go:271 +0x13a fp=0xc420038768 sp=0xc420038738

runtime.goparkunlock(0x1274910, 0xcf395c, 0xf, 0xc420000114, 0x1)

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/proc.go:277 +0x5e fp=0xc4200387a8 sp=0xc420038768

runtime.forcegchelper()

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/proc.go:226 +0x9e fp=0xc4200387e0 sp=0xc4200387a8

runtime.goexit()

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/asm_amd64.s:2197 +0x1 fp=0xc4200387e8 sp=0xc4200387e0

created by runtime.init.4

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/proc.go:215 +0x35

goroutine 3 [GC sweep wait]:

runtime.gopark(0xd21c68, 0x1274b40, 0xcf1a4b, 0xd, 0x456314, 0x1)

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/proc.go:271 +0x13a fp=0xc420038f58 sp=0xc420038f28

runtime.goparkunlock(0x1274b40, 0xcf1a4b, 0xd, 0x14, 0x1)

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/proc.go:277 +0x5e fp=0xc420038f98 sp=0xc420038f58

runtime.bgsweep(0xc420066000)

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/mgcsweep.go:72 +0x12e fp=0xc420038fd8 sp=0xc420038f98

runtime.goexit()

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/asm_amd64.s:2197 +0x1 fp=0xc420038fe0 sp=0xc420038fd8

created by runtime.gcenable

	/home/couchbase/.cbdepscache/exploded/x86_64/go-1.8.3/go/src/runtime/mgc.go:212 +0x61