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bcache's Issues

BCache + Linux Kernel 5.12 broken

I've been using bcache + btrfs for a while on two different machines with no issue, up to kernel 5.11.
After I've upgraded to kernel 5.12, I can't access the bcache device any more.

I guess there is something to do with this.

> uname -a 
Linux Zerver 5.12.0-1-MANJARO #1 SMP PREEMPT Mon Apr 26 22:09:28 UTC 2021 x86_64 GNU/Linux

> lsblk 
NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda           8:0    0   3.6T  0 disk 
├─sda1        8:1    0   512M  0 part 
├─sda2        8:2    0    40G  0 part 
└─sda3        8:3    0   3.6T  0 part /backup
sdb           8:16   0 931.5G  0 disk 
└─sdb1        8:17   0 931.5G  0 part 
  └─bcache0 254:0    0 931.5G  0 disk /hdd
sdc           8:32   0 238.5G  0 disk 
├─sdc1        8:33   0   150G  0 part /
├─sdc2        8:34   0    99M  0 part /boot/efi
├─sdc3        8:35   0  75.4G  0 part 
│ └─bcache0 254:0    0 931.5G  0 disk /hdd
└─sdc4        8:36   0  12.8G  0 part [SWAP]

dmesg | grep -i bcache
[   19.927658] bcache: register_bdev() registered backing device sdb1
[   20.187699] bcache: bch_journal_replay() journal replay done, 167 keys in 6 entries, seq 1294607
[   20.235498] bcache: bch_cached_dev_attach() Caching sdb1 as bcache0 on set c37f21c6-5f1d-4bd3-9fb0-5181a4908e08
[   20.235544] bcache: register_cache() registered cache device sdc3
[   20.312354] BTRFS: device label Data devid 1 transid 78169 /dev/bcache0 scanned by systemd-udevd (360)
[   20.329275] BTRFS info (device bcache0): enabling auto defrag
[   20.329279] BTRFS info (device bcache0): disk space caching is enabled
[   20.329280] BTRFS info (device bcache0): has skinny extents
[   22.940838] BTRFS info (device bcache0): enabling ssd optimizations
[15167.365514]  cached_dev_cache_miss+0xf7/0x2f0 [bcache]
[15167.365536]  cache_lookup_fn+0x13a/0x310 [bcache]
[15167.365549]  ? bch_data_invalidate+0x190/0x190 [bcache]
[15167.365562]  bch_btree_map_keys_recurse+0x9f/0x1a0 [bcache]
[15167.365575]  ? bch_data_invalidate+0x190/0x190 [bcache]
[15167.365588]  bch_btree_map_keys_recurse+0x11a/0x1a0 [bcache]
[15167.365600]  bch_btree_map_keys+0x1cb/0x1f0 [bcache]
[15167.365612]  ? bch_data_invalidate+0x190/0x190 [bcache]
[15167.365625]  cache_lookup+0xa1/0x160 [bcache]
[15167.365645]  cached_dev_submit_bio+0x9c1/0xd30 [bcache]
[15167.365944] Modules linked in: udp_diag tcp_diag inet_diag xt_nat xt_tcpudp veth xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xt_addrtype iptable_filter iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 br_netfilter bridge stp llc hid_logitech_hidpp joydev mousedev hid_logitech_dj usbhid snd_hda_codec_hdmi rfkill intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel vfat fat iTCO_wdt intel_pmc_bxt mxm_wmi intel_wmi_thunderbolt overlay iTCO_vendor_support kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel crypto_simd cryptd btrfs rapl intel_cstate snd_hda_codec_realtek intel_uncore snd_hda_codec_generic blake2b_generic ledtrig_audio xor bcache raid6_pq snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi pcspkr snd_hda_codec libcrc32c crc64 snd_hda_core snd_hwdep snd_pcm snd_timer snd mei_me i2c_i801 lpc_ich i2c_smbus e1000e mei soundcore wmi mac_hid tcp_bbr uinput nvidia_drm(POE) nvidia_modeset(POE)
[15167.366003]  drm_kms_helper cec drm agpgart syscopyarea sysfillrect sysimgblt fb_sys_fops nvidia(POE) ipmi_devintf ipmi_msghandler vboxnetflt(OE) vboxnetadp(OE) vboxdrv(OE) crypto_user fuse ip_tables x_tables ext4 crc32c_generic crc16 mbcache jbd2 crc32c_intel xhci_pci

> dmesg | grep -i btrfs
[   20.089833] Btrfs loaded, crc32c=crc32c-intel, zoned=yes
[   20.090760] BTRFS: device label Backup devid 1 transid 6286 /dev/sda3 scanned by systemd-udevd (343)
[   20.263819] BTRFS info (device sda3): enabling auto defrag
[   20.263826] BTRFS info (device sda3): disk space caching is enabled
[   20.263827] BTRFS info (device sda3): has skinny extents
[   20.312354] BTRFS: device label Data devid 1 transid 78169 /dev/bcache0 scanned by systemd-udevd (360)
[   20.329275] BTRFS info (device bcache0): enabling auto defrag
[   20.329279] BTRFS info (device bcache0): disk space caching is enabled
[   20.329280] BTRFS info (device bcache0): has skinny extents
[   22.940838] BTRFS info (device bcache0): enabling ssd optimizations
[15167.365673]  btrfs_map_bio+0x19b/0x4b0 [btrfs]
[15167.365731]  btrfs_submit_data_bio+0xbd/0x210 [btrfs]
[15167.365768]  submit_one_bio+0x44/0x70 [btrfs]
[15167.365809]  extent_readahead+0x3b4/0x3e0 [btrfs]
[15167.365944] Modules linked in: udp_diag tcp_diag inet_diag xt_nat xt_tcpudp veth xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xt_addrtype iptable_filter iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 br_netfilter bridge stp llc hid_logitech_hidpp joydev mousedev hid_logitech_dj usbhid snd_hda_codec_hdmi rfkill intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel vfat fat iTCO_wdt intel_pmc_bxt mxm_wmi intel_wmi_thunderbolt overlay iTCO_vendor_support kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel crypto_simd cryptd btrfs rapl intel_cstate snd_hda_codec_realtek intel_uncore snd_hda_codec_generic blake2b_generic ledtrig_audio xor bcache raid6_pq snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi pcspkr snd_hda_codec libcrc32c crc64 snd_hda_core snd_hwdep snd_pcm snd_timer snd mei_me i2c_i801 lpc_ich i2c_smbus e1000e mei soundcore wmi mac_hid tcp_bbr uinput nvidia_drm(POE) nvidia_modeset(POE)

Delete key in underlying cache when calling Delete API

When calling Delete API we currently only mark it as delete, not delete the key from underlying cache.

The reason is that i'm still not sure when is the safe time to delete it.

Consider this example situation, when we have three nodes:

  • Node 2 has network issue, make it unreachable by the others
  • Node 1 delete they key A
  • Node 1 broadcasts the change
  • Node 3 got the change

What happens to node 2 when it become reachable again, will it see the change? Will mesh handle it for us?

If we only marked it as deleted, the state will be kept by node 1 & node 3, and it will reach eventual consistency (to node 2) as promised by mesh library that used by bcache.

integration test: concurrent map iteration and map write

The integration test is supposed to be not thread safe, but there is intermittent unexpected concurrent map access there.
Should do further check about this, make sure it is not from bcache

log

$ export GO111MODULE="auto"
travis_time:end:05ebcc60:start=1555427327851098711,finish=1555427327932732509,duration=81633798
�[0K$ gimme version
v1.5.3
$ go version
go version go1.11.9 linux/amd64
travis_fold:start:go.env
�[0K$ go env
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/travis/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/travis/gopath"
GOPROXY=""
GORACE=""
GOROOT="/home/travis/.gimme/versions/go1.11.9.linux.amd64"
GOTMPDIR=""
GOTOOLDIR="/home/travis/.gimme/versions/go1.11.9.linux.amd64/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build023390760=/tmp/go-build -gno-record-gcc-switches"
travis_fold:end:go.env
�[0Ktravis_fold:start:install
�[0Ktravis_time:start:2d70d67c
�[0K$ go get -v -t
github.com/hashicorp/golang-lru (download)
github.com/json-iterator/go (download)
github.com/modern-go/concurrent (download)
github.com/modern-go/reflect2 (download)
github.com/weaveworks/mesh (download)
Fetching https://golang.org/x/crypto/nacl/box?go-get=1
Parsing meta tags from https://golang.org/x/crypto/nacl/box?go-get=1 (status code 200)
get "golang.org/x/crypto/nacl/box": found meta tag get.metaImport{Prefix:"golang.org/x/crypto", VCS:"git", RepoRoot:"https://go.googlesource.com/crypto"} at https://golang.org/x/crypto/nacl/box?go-get=1
get "golang.org/x/crypto/nacl/box": verifying non-authoritative meta tag
Fetching https://golang.org/x/crypto?go-get=1
Parsing meta tags from https://golang.org/x/crypto?go-get=1 (status code 200)
golang.org/x/crypto (download)
Fetching https://golang.org/x/crypto/nacl/secretbox?go-get=1
Parsing meta tags from https://golang.org/x/crypto/nacl/secretbox?go-get=1 (status code 200)
get "golang.org/x/crypto/nacl/secretbox": found meta tag get.metaImport{Prefix:"golang.org/x/crypto", VCS:"git", RepoRoot:"https://go.googlesource.com/crypto"} at https://golang.org/x/crypto/nacl/secretbox?go-get=1
get "golang.org/x/crypto/nacl/secretbox": verifying non-authoritative meta tag
Fetching https://golang.org/x/sync/singleflight?go-get=1
Parsing meta tags from https://golang.org/x/sync/singleflight?go-get=1 (status code 200)
get "golang.org/x/sync/singleflight": found meta tag get.metaImport{Prefix:"golang.org/x/sync", VCS:"git", RepoRoot:"https://go.googlesource.com/sync"} at https://golang.org/x/sync/singleflight?go-get=1
get "golang.org/x/sync/singleflight": verifying non-authoritative meta tag
Fetching https://golang.org/x/sync?go-get=1
Parsing meta tags from https://golang.org/x/sync?go-get=1 (status code 200)
golang.org/x/sync (download)
github.com/sirupsen/logrus (download)
Fetching https://golang.org/x/sys/unix?go-get=1
Parsing meta tags from https://golang.org/x/sys/unix?go-get=1 (status code 200)
get "golang.org/x/sys/unix": found meta tag get.metaImport{Prefix:"golang.org/x/sys", VCS:"git", RepoRoot:"https://go.googlesource.com/sys"} at https://golang.org/x/sys/unix?go-get=1
get "golang.org/x/sys/unix": verifying non-authoritative meta tag
Fetching https://golang.org/x/sys?go-get=1
Parsing meta tags from https://golang.org/x/sys?go-get=1 (status code 200)
golang.org/x/sys (download)
github.com/stretchr/testify (download)
github.com/hashicorp/golang-lru/simplelru
github.com/hashicorp/golang-lru
github.com/modern-go/concurrent
github.com/modern-go/reflect2
golang.org/x/crypto/curve25519
golang.org/x/crypto/internal/subtle
golang.org/x/crypto/poly1305
golang.org/x/crypto/salsa20/salsa
golang.org/x/crypto/nacl/secretbox
golang.org/x/crypto/nacl/box
github.com/weaveworks/mesh
github.com/json-iterator/go
golang.org/x/sync/singleflight
github.com/iwanbk/bcache
travis_time:end:2d70d67c:start=1555427328004585270,finish=1555427336379863770,duration=8375278500
�[0Ktravis_fold:end:install
�[0Ktravis_time:start:091201e1
�[0K$ go build
travis_time:end:091201e1:start=1555427336384722777,finish=1555427336502743696,duration=118020919
�[0K�[32;1mThe command "go build" exited with 0.�[0m

travis_time:start:01f7757e
�[0K$ go test -race -coverprofile=coverage.txt -covermode=atomic
PASS
coverage: 49.5% of statements
ok  	github.com/iwanbk/bcache	1.031s
travis_time:end:01f7757e:start=1555427336508045718,finish=1555427346309279719,duration=9801234001
�[0K�[32;1mThe command "go test -race -coverprofile=coverage.txt -covermode=atomic" exited with 0.�[0m

travis_time:start:00be5070
�[0K$ go test -tags integration -coverprofile=coverage.txt -covermode=atomic
fatal error: concurrent map iteration and map write

goroutine 29 [running]:
runtime.throw(0x884cd0, 0x26)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/runtime/panic.go:608 +0x72 fp=0xc00018f918 sp=0xc00018f8e8 pc=0x42db62
runtime.mapiternext(0xc000272b40)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/runtime/map.go:790 +0x525 fp=0xc00018f9a0 sp=0xc00018f918 pc=0x410555
reflect.mapiternext(0xc000272b40)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/runtime/map.go:1277 +0x2b fp=0xc00018f9b8 sp=0xc00018f9a0 pc=0x4113fb
github.com/modern-go/reflect2.(*UnsafeMapIterator).UnsafeNext(0xc0002c7340, 0x0, 0x40)
	/home/travis/gopath/src/github.com/modern-go/reflect2/unsafe_map.go:136 +0x41 fp=0xc00018f9e0 sp=0xc00018f9b8 pc=0x60e441
github.com/json-iterator/go.(*sortKeysMapEncoder).Encode(0xc0001bec30, 0xc000155550, 0xc00012f320)
	/home/travis/gopath/src/github.com/json-iterator/go/reflect_map.go:293 +0x1b2 fp=0xc00018fb40 sp=0xc00018f9e0 pc=0x6594b2
github.com/json-iterator/go.(*structFieldEncoder).Encode(0xc0001becf0, 0xc000155530, 0xc00012f320)
	/home/travis/gopath/src/github.com/json-iterator/go/reflect_struct_encoder.go:110 +0x7b fp=0xc00018fbc8 sp=0xc00018fb40 pc=0x667bcb
github.com/json-iterator/go.(*structEncoder).Encode(0xc0001bed50, 0xc000155530, 0xc00012f320)
	/home/travis/gopath/src/github.com/json-iterator/go/reflect_struct_encoder.go:158 +0x2c9 fp=0xc00018fc78 sp=0xc00018fbc8 pc=0x668179
github.com/json-iterator/go.(*OptionalEncoder).Encode(0xc000139830, 0xc00027e348, 0xc00012f320)
	/home/travis/gopath/src/github.com/json-iterator/go/reflect_optional.go:74 +0xe9 fp=0xc00018fcc8 sp=0xc00018fc78 pc=0x65ea59
github.com/json-iterator/go.(*onePtrEncoder).Encode(0xc000139840, 0xc000155530, 0xc00012f320)
	/home/travis/gopath/src/github.com/json-iterator/go/reflect.go:214 +0x68 fp=0xc00018fcf0 sp=0xc00018fcc8 pc=0x650b48
github.com/json-iterator/go.(*Stream).WriteVal(0xc00012f320, 0x8165a0, 0xc000155530)
	/home/travis/gopath/src/github.com/json-iterator/go/reflect.go:93 +0x118 fp=0xc00018fd50 sp=0xc00018fcf0 pc=0x64faf8
github.com/json-iterator/go.(*frozenConfig).Marshal(0xc0000ae1e0, 0x8165a0, 0xc000155530, 0x0, 0x0, 0x0, 0x0, 0x0)
	/home/travis/gopath/src/github.com/json-iterator/go/config.go:299 +0xac fp=0xc00018fdc0 sp=0xc00018fd50 pc=0x6461fc
github.com/json-iterator/go.API.Marshal-fm(0x8165a0, 0xc000155530, 0xc000155530, 0xc000144cf0, 0xc0000dd380, 0xc0000dd380, 0x0)
	/home/travis/gopath/src/github.com/iwanbk/bcache/json.go:7 +0x43 fp=0xc00018fe10 sp=0xc00018fdc0 pc=0x7927e3
github.com/iwanbk/bcache.(*message).Encode(0xc000155530, 0x0, 0x0, 0x0)
	/home/travis/gopath/src/github.com/iwanbk/bcache/message.go:67 +0xa0 fp=0xc00018fe80 sp=0xc00018fe10 pc=0x788790
github.com/weaveworks/mesh.(*gossipSender).deliver(0xc000132320, 0xc000158060, 0x3, 0x1, 0x1)
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:144 +0x88 fp=0xc00018fef0 sp=0xc00018fe80 pc=0x5ed778
github.com/weaveworks/mesh.(*gossipSender).run(0xc000132320, 0xc000158060, 0xc000158240, 0xc0001582a0)
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:105 +0x1c5 fp=0xc00018ffc0 sp=0xc00018fef0 pc=0x5ed6a5
runtime.goexit()
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc00018ffc8 sp=0xc00018ffc0 pc=0x45ce71
created by github.com/weaveworks/mesh.newGossipSender
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:94 +0x118

goroutine 1 [chan receive]:
testing.(*T).Run(0xc0000d4200, 0x87ac92, 0xf, 0x890528, 0x47c7b6)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/testing/testing.go:879 +0x383
testing.runTests.func1(0xc0000d4100)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/testing/testing.go:1119 +0x78
testing.tRunner(0xc0000d4100, 0xc0000a1da0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/testing/testing.go:827 +0xbf
testing.runTests(0xc00000d240, 0xbd1ae0, 0xb, 0xb, 0x40d55f)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/testing/testing.go:1117 +0x2aa
testing.(*M).Run(0xc000122000, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/testing/testing.go:1034 +0x165
main.main()
	_testmain.go:124 +0x205

goroutine 5 [chan receive]:
github.com/iwanbk/bcache.(*peer).Delete(0xc000075fc0, 0xc000026c80, 0x5, 0x1595fcf156964cf2, 0xbf2599e7ef77d6f2)
	/home/travis/gopath/src/github.com/iwanbk/bcache/peer.go:142 +0xf9
github.com/iwanbk/bcache.(*Bcache).Delete(0xc00012c040, 0xc000026c80, 0x5)
	/home/travis/gopath/src/github.com/iwanbk/bcache/bcache.go:128 +0xbb
github.com/iwanbk/bcache.TestIntegration(0xc0000d4200)
	/home/travis/gopath/src/github.com/iwanbk/bcache/bcache_test.go:108 +0xbd1
testing.tRunner(0xc0000d4200, 0x890528)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/testing/testing.go:827 +0xbf
created by testing.(*T).Run
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/testing/testing.go:878 +0x35c

goroutine 6 [select]:
github.com/weaveworks/mesh.(*localPeer).actorLoop(0xc0000e6990, 0xc000076480)
	/home/travis/gopath/src/github.com/weaveworks/mesh/local_peer.go:141 +0xcf
created by github.com/weaveworks/mesh.newLocalPeer
	/home/travis/gopath/src/github.com/weaveworks/mesh/local_peer.go:31 +0x105

goroutine 7 [select]:
github.com/weaveworks/mesh.(*routes).run(0xc000122100, 0xc0000765a0, 0xc000030600, 0xc000030660)
	/home/travis/gopath/src/github.com/weaveworks/mesh/routes.go:177 +0xfb
created by github.com/weaveworks/mesh.newRoutes
	/home/travis/gopath/src/github.com/weaveworks/mesh/routes.go:44 +0x2e9

goroutine 8 [select]:
github.com/weaveworks/mesh.(*connectionMaker).queryLoop(0xc0000c49a0, 0xc000076600)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection_maker.go:226 +0x107
created by github.com/weaveworks/mesh.newConnectionMaker
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection_maker.go:75 +0x148

goroutine 9 [runnable]:
github.com/iwanbk/bcache.(*message).mergeComplete(0xc0001558f0, 0xc000155980, 0x0, 0x0)
	/home/travis/gopath/src/github.com/iwanbk/bcache/message.go:90 +0x27a
github.com/iwanbk/bcache.(*message).Merge(0xc0001558f0, 0x8e3c60, 0xc000155980, 0xc00027a458, 0xc000132601)
	/home/travis/gopath/src/github.com/iwanbk/bcache/message.go:76 +0x5a
github.com/weaveworks/mesh.(*gossipSender).Broadcast(0xc0001326e0, 0x1, 0x8e3c60, 0xc000155980)
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:199 +0xd0
github.com/weaveworks/mesh.(*gossipChannel).relayBroadcast(0xc00012c000, 0x1, 0x8e3c60, 0xc000155980)
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip_channel.go:110 +0x162
github.com/weaveworks/mesh.(*gossipChannel).GossipBroadcast(0xc00012c000, 0x8e3c60, 0xc000155980)
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip_channel.go:83 +0x4f
github.com/iwanbk/bcache.(*peer).broadcast(0xc000075fc0, 0xc000155980)
	/home/travis/gopath/src/github.com/iwanbk/bcache/peer.go:165 +0x75
github.com/iwanbk/bcache.(*peer).Delete.func1()
	/home/travis/gopath/src/github.com/iwanbk/bcache/peer.go:139 +0x207
github.com/iwanbk/bcache.(*peer).loop(0xc000075fc0)
	/home/travis/gopath/src/github.com/iwanbk/bcache/peer.go:154 +0x5b
created by github.com/iwanbk/bcache.newPeer
	/home/travis/gopath/src/github.com/iwanbk/bcache/peer.go:30 +0x151

goroutine 10 [IO wait]:
internal/poll.runtime_pollWait(0x7f9111d08f00, 0x72, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/runtime/netpoll.go:173 +0x66
internal/poll.(*pollDesc).wait(0xc000122298, 0x72, 0xc000142000, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_poll_runtime.go:85 +0x9a
internal/poll.(*pollDesc).waitRead(0xc000122298, 0xffffffffffffff00, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Accept(0xc000122280, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_unix.go:384 +0x1a0
net.(*netFD).accept(0xc000122280, 0x35a4e900, 0xed447e70e, 0xbd75a0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/fd_unix.go:238 +0x42
net.(*TCPListener).accept(0xc00000e730, 0xbd75a0, 0x29b92700, 0xed447e70e)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/tcpsock_posix.go:139 +0x2e
net.(*TCPListener).AcceptTCP(0xc00000e730, 0xc000134e18, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/tcpsock.go:247 +0x47
github.com/weaveworks/mesh.(*Router).listenTCP.func1(0xc00000e730, 0xc0000dca90)
	/home/travis/gopath/src/github.com/weaveworks/mesh/router.go:113 +0x59
created by github.com/weaveworks/mesh.(*Router).listenTCP
	/home/travis/gopath/src/github.com/weaveworks/mesh/router.go:110 +0x152

goroutine 11 [select]:
github.com/weaveworks/mesh.(*localPeer).actorLoop(0xc0000e6db0, 0xc000076780)
	/home/travis/gopath/src/github.com/weaveworks/mesh/local_peer.go:141 +0xcf
created by github.com/weaveworks/mesh.newLocalPeer
	/home/travis/gopath/src/github.com/weaveworks/mesh/local_peer.go:31 +0x105

goroutine 12 [select]:
github.com/weaveworks/mesh.(*routes).run(0xc000122380, 0xc0000768a0, 0xc000030780, 0xc0000307e0)
	/home/travis/gopath/src/github.com/weaveworks/mesh/routes.go:177 +0xfb
created by github.com/weaveworks/mesh.newRoutes
	/home/travis/gopath/src/github.com/weaveworks/mesh/routes.go:44 +0x2e9

goroutine 13 [select]:
github.com/weaveworks/mesh.(*connectionMaker).queryLoop(0xc0000c4a10, 0xc000076900)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection_maker.go:226 +0x107
created by github.com/weaveworks/mesh.newConnectionMaker
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection_maker.go:75 +0x148

goroutine 14 [select]:
github.com/iwanbk/bcache.(*peer).loop(0xc00012c0c0)
	/home/travis/gopath/src/github.com/iwanbk/bcache/peer.go:152 +0xef
created by github.com/iwanbk/bcache.newPeer
	/home/travis/gopath/src/github.com/iwanbk/bcache/peer.go:30 +0x151

goroutine 15 [IO wait]:
internal/poll.runtime_pollWait(0x7f9111d08e30, 0x72, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/runtime/netpoll.go:173 +0x66
internal/poll.(*pollDesc).wait(0xc000122498, 0x72, 0xc000142000, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_poll_runtime.go:85 +0x9a
internal/poll.(*pollDesc).waitRead(0xc000122498, 0xffffffffffffff00, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Accept(0xc000122480, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_unix.go:384 +0x1a0
net.(*netFD).accept(0xc000122480, 0x2faf0800, 0xed447e70e, 0xbd75a0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/fd_unix.go:238 +0x42
net.(*TCPListener).accept(0xc00000e748, 0xbd75a0, 0x29b92700, 0xed447e70e)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/tcpsock_posix.go:139 +0x2e
net.(*TCPListener).AcceptTCP(0xc00000e748, 0xc000135ab8, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/tcpsock.go:247 +0x47
github.com/weaveworks/mesh.(*Router).listenTCP.func1(0xc00000e748, 0xc0000dcc30)
	/home/travis/gopath/src/github.com/weaveworks/mesh/router.go:113 +0x59
created by github.com/weaveworks/mesh.(*Router).listenTCP
	/home/travis/gopath/src/github.com/weaveworks/mesh/router.go:110 +0x152

goroutine 16 [select]:
github.com/weaveworks/mesh.(*localPeer).actorLoop(0xc0000e7200, 0xc000076a20)
	/home/travis/gopath/src/github.com/weaveworks/mesh/local_peer.go:141 +0xcf
created by github.com/weaveworks/mesh.newLocalPeer
	/home/travis/gopath/src/github.com/weaveworks/mesh/local_peer.go:31 +0x105

goroutine 34 [select]:
github.com/weaveworks/mesh.(*routes).run(0xc000122580, 0xc000076b40, 0xc000030900, 0xc000030960)
	/home/travis/gopath/src/github.com/weaveworks/mesh/routes.go:177 +0xfb
created by github.com/weaveworks/mesh.newRoutes
	/home/travis/gopath/src/github.com/weaveworks/mesh/routes.go:44 +0x2e9

goroutine 35 [select]:
github.com/weaveworks/mesh.(*connectionMaker).queryLoop(0xc0000c4a80, 0xc000076ba0)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection_maker.go:226 +0x107
created by github.com/weaveworks/mesh.newConnectionMaker
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection_maker.go:75 +0x148

goroutine 36 [select]:
github.com/iwanbk/bcache.(*peer).loop(0xc00012c1c0)
	/home/travis/gopath/src/github.com/iwanbk/bcache/peer.go:152 +0xef
created by github.com/iwanbk/bcache.newPeer
	/home/travis/gopath/src/github.com/iwanbk/bcache/peer.go:30 +0x151

goroutine 37 [IO wait]:
internal/poll.runtime_pollWait(0x7f9111d08d60, 0x72, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/runtime/netpoll.go:173 +0x66
internal/poll.(*pollDesc).wait(0xc000122698, 0x72, 0xc0001f5300, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_poll_runtime.go:85 +0x9a
internal/poll.(*pollDesc).waitRead(0xc000122698, 0xffffffffffffff00, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Accept(0xc000122680, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_unix.go:384 +0x1a0
net.(*netFD).accept(0xc000122680, 0x2faf0800, 0xed447e70e, 0xbd75a0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/fd_unix.go:238 +0x42
net.(*TCPListener).accept(0xc00000e760, 0xbd75a0, 0x29b92700, 0xed447e70e)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/tcpsock_posix.go:139 +0x2e
net.(*TCPListener).AcceptTCP(0xc00000e760, 0xc00027e088, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/tcpsock.go:247 +0x47
github.com/weaveworks/mesh.(*Router).listenTCP.func1(0xc00000e760, 0xc0000dcea0)
	/home/travis/gopath/src/github.com/weaveworks/mesh/router.go:113 +0x59
created by github.com/weaveworks/mesh.(*Router).listenTCP
	/home/travis/gopath/src/github.com/weaveworks/mesh/router.go:110 +0x152

goroutine 22 [select]:
github.com/weaveworks/mesh.(*LocalConnection).actorLoop(0xc00015e0a0, 0xc00012e780, 0xc00015e0a0, 0x8e2060)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:354 +0x292
github.com/weaveworks/mesh.(*LocalConnection).run(0xc00015e0a0, 0xc00012e780, 0xc000158060, 0xc000051f01)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:256 +0x752
created by github.com/weaveworks/mesh.startLocalConnection
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:99 +0x1fe

goroutine 20 [select]:
github.com/weaveworks/mesh.(*LocalConnection).actorLoop(0xc00015e000, 0xc00012e6c0, 0xc00015e000, 0x8e2060)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:354 +0x292
github.com/weaveworks/mesh.(*LocalConnection).run(0xc00015e000, 0xc00012e6c0, 0xc000158000, 0x1)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:256 +0x752
created by github.com/weaveworks/mesh.startLocalConnection
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:99 +0x1fe

goroutine 28 [select]:
github.com/weaveworks/mesh.(*gossipSender).run(0xc0001322d0, 0xc000158060, 0xc000158180, 0xc0001581e0)
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:101 +0xeb
created by github.com/weaveworks/mesh.newGossipSender
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:94 +0x118

goroutine 30 [IO wait]:
internal/poll.runtime_pollWait(0x7f9111d08bc0, 0x72, 0xc000217d10)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/runtime/netpoll.go:173 +0x66
internal/poll.(*pollDesc).wait(0xc00014c098, 0x72, 0xffffffffffffff00, 0x8e2da0, 0xb9d4f0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_poll_runtime.go:85 +0x9a
internal/poll.(*pollDesc).waitRead(0xc00014c098, 0xc0002c4100, 0x4, 0x4)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Read(0xc00014c080, 0xc0002c4180, 0x4, 0x4, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_unix.go:169 +0x179
net.(*netFD).Read(0xc00014c080, 0xc0002c4180, 0x4, 0x4, 0xc000132200, 0xc000217e10, 0xc000217e50)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/fd_unix.go:202 +0x4f
net.(*conn).Read(0xc000134010, 0xc0002c4180, 0x4, 0x4, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/net.go:177 +0x68
io.ReadAtLeast(0x8e2220, 0xc000134010, 0xc0002c4180, 0x4, 0x4, 0x4, 0x7d73e0, 0x1, 0xc0002c4180)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/io/io.go:310 +0x88
io.ReadFull(0x8e2220, 0xc000134010, 0xc0002c4180, 0x4, 0x4, 0x4, 0xc000217f38, 0x3c)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/io/io.go:329 +0x58
github.com/weaveworks/mesh.(*lengthPrefixTCPReceiver).Receive(0xc000138310, 0x0, 0x0, 0xfec, 0xfec, 0x0)
	/home/travis/gopath/src/github.com/weaveworks/mesh/protocol_crypto.go:168 +0x96
github.com/weaveworks/mesh.(*LocalConnection).receiveTCP(0xc00015e0a0, 0x8e2060, 0xc000138310)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:420 +0x56
created by github.com/weaveworks/mesh.(*LocalConnection).run
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:247 +0x734

goroutine 31 [select]:
github.com/weaveworks/mesh.(*gossipSender).run(0xc0001324b0, 0xc000158000, 0xc000158540, 0xc0001585a0)
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:101 +0xeb
created by github.com/weaveworks/mesh.newGossipSender
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:94 +0x118

goroutine 32 [select]:
github.com/weaveworks/mesh.(*gossipSender).run(0xc000132500, 0xc000158000, 0xc000158600, 0xc000158660)
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:101 +0xeb
created by github.com/weaveworks/mesh.newGossipSender
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:94 +0x118

goroutine 33 [IO wait]:
internal/poll.runtime_pollWait(0x7f9111d08c90, 0x72, 0xc0001e3d10)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/runtime/netpoll.go:173 +0x66
internal/poll.(*pollDesc).wait(0xc00014c018, 0x72, 0xffffffffffffff00, 0x8e2da0, 0xb9d4f0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_poll_runtime.go:85 +0x9a
internal/poll.(*pollDesc).waitRead(0xc00014c018, 0xc000250f00, 0x4, 0x4)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Read(0xc00014c000, 0xc000250f5c, 0x4, 0x4, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_unix.go:169 +0x179
net.(*netFD).Read(0xc00014c000, 0xc000250f5c, 0x4, 0x4, 0xc000132100, 0xc0001e3e10, 0xc0001e3e50)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/fd_unix.go:202 +0x4f
net.(*conn).Read(0xc000134008, 0xc000250f5c, 0x4, 0x4, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/net.go:177 +0x68
io.ReadAtLeast(0x8e2220, 0xc000134008, 0xc000250f5c, 0x4, 0x4, 0x4, 0x7d73e0, 0x1, 0xc000250f5c)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/io/io.go:310 +0x88
io.ReadFull(0x8e2220, 0xc000134008, 0xc000250f5c, 0x4, 0x4, 0x4, 0xc0001e3f38, 0x3c)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/io/io.go:329 +0x58
github.com/weaveworks/mesh.(*lengthPrefixTCPReceiver).Receive(0xc000138100, 0x0, 0x0, 0x1a3, 0x1a3, 0x0)
	/home/travis/gopath/src/github.com/weaveworks/mesh/protocol_crypto.go:168 +0x96
github.com/weaveworks/mesh.(*LocalConnection).receiveTCP(0xc00015e000, 0x8e2060, 0xc000138100)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:420 +0x56
created by github.com/weaveworks/mesh.(*LocalConnection).run
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:247 +0x734

goroutine 53 [select]:
github.com/weaveworks/mesh.(*LocalConnection).actorLoop(0xc00015ea00, 0xc00021a420, 0xc00015ea00, 0x8e2060)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:354 +0x292
github.com/weaveworks/mesh.(*LocalConnection).run(0xc00015ea00, 0xc00021a420, 0xc000158b40, 0xc00005ff01)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:256 +0x752
created by github.com/weaveworks/mesh.startLocalConnection
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:99 +0x1fe

goroutine 51 [select]:
github.com/weaveworks/mesh.(*LocalConnection).actorLoop(0xc00015e960, 0xc00021a360, 0xc00015e960, 0x8e2060)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:354 +0x292
github.com/weaveworks/mesh.(*LocalConnection).run(0xc00015e960, 0xc00021a360, 0xc000158ae0, 0x1)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:256 +0x752
created by github.com/weaveworks/mesh.startLocalConnection
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:99 +0x1fe

goroutine 59 [runnable]:
github.com/weaveworks/mesh.(*gossipSender).run(0xc0001326e0, 0xc000158b40, 0xc000158c60, 0xc000158cc0)
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:101 +0xeb
created by github.com/weaveworks/mesh.newGossipSender
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:94 +0x118

goroutine 60 [select]:
github.com/weaveworks/mesh.(*gossipSender).run(0xc000132730, 0xc000158b40, 0xc000158d20, 0xc000158d80)
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:101 +0xeb
created by github.com/weaveworks/mesh.newGossipSender
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:94 +0x118

goroutine 61 [IO wait]:
internal/poll.runtime_pollWait(0x7f9111d08a20, 0x72, 0xc000267d10)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/runtime/netpoll.go:173 +0x66
internal/poll.(*pollDesc).wait(0xc000205a98, 0x72, 0xffffffffffffff00, 0x8e2da0, 0xb9d4f0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_poll_runtime.go:85 +0x9a
internal/poll.(*pollDesc).waitRead(0xc000205a98, 0xc000250800, 0x4, 0x4)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Read(0xc000205a80, 0xc0002508c0, 0x4, 0x4, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_unix.go:169 +0x179
net.(*netFD).Read(0xc000205a80, 0xc0002508c0, 0x4, 0x4, 0xc000132100, 0xc000267e10, 0xc000267e50)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/fd_unix.go:202 +0x4f
net.(*conn).Read(0xc000134e18, 0xc0002508c0, 0x4, 0x4, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/net.go:177 +0x68
io.ReadAtLeast(0x8e2220, 0xc000134e18, 0xc0002508c0, 0x4, 0x4, 0x4, 0x7d73e0, 0x1, 0xc0002508c0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/io/io.go:310 +0x88
io.ReadFull(0x8e2220, 0xc000134e18, 0xc0002508c0, 0x4, 0x4, 0x4, 0xc000267f38, 0x3c)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/io/io.go:329 +0x58
github.com/weaveworks/mesh.(*lengthPrefixTCPReceiver).Receive(0xc0001fdd20, 0x0, 0x0, 0x2b, 0x2b, 0x0)
	/home/travis/gopath/src/github.com/weaveworks/mesh/protocol_crypto.go:168 +0x96
github.com/weaveworks/mesh.(*LocalConnection).receiveTCP(0xc00015ea00, 0x8e2060, 0xc0001fdd20)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:420 +0x56
created by github.com/weaveworks/mesh.(*LocalConnection).run
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:247 +0x734

goroutine 63 [select]:
github.com/weaveworks/mesh.(*gossipSender).run(0xc000132870, 0xc000158ae0, 0xc0001590e0, 0xc000159140)
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:101 +0xeb
created by github.com/weaveworks/mesh.newGossipSender
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:94 +0x118

goroutine 64 [select]:
github.com/weaveworks/mesh.(*gossipSender).run(0xc0001328c0, 0xc000158ae0, 0xc0001591a0, 0xc000159200)
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:101 +0xeb
created by github.com/weaveworks/mesh.newGossipSender
	/home/travis/gopath/src/github.com/weaveworks/mesh/gossip.go:94 +0x118

goroutine 65 [IO wait]:
internal/poll.runtime_pollWait(0x7f9111d08af0, 0x72, 0xc000237d10)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/runtime/netpoll.go:173 +0x66
internal/poll.(*pollDesc).wait(0xc000205a18, 0x72, 0xffffffffffffff00, 0x8e2da0, 0xb9d4f0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_poll_runtime.go:85 +0x9a
internal/poll.(*pollDesc).waitRead(0xc000205a18, 0xc0002c4c00, 0x4, 0x4)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Read(0xc000205a00, 0xc0002c4c58, 0x4, 0x4, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/internal/poll/fd_unix.go:169 +0x179
net.(*netFD).Read(0xc000205a00, 0xc0002c4c58, 0x4, 0x4, 0xc000132200, 0xc000237e10, 0xc000237e50)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/fd_unix.go:202 +0x4f
net.(*conn).Read(0xc000134e10, 0xc0002c4c58, 0x4, 0x4, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/net/net.go:177 +0x68
io.ReadAtLeast(0x8e2220, 0xc000134e10, 0xc0002c4c58, 0x4, 0x4, 0x4, 0x7d73e0, 0x1, 0xc0002c4c58)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/io/io.go:310 +0x88
io.ReadFull(0x8e2220, 0xc000134e10, 0xc0002c4c58, 0x4, 0x4, 0x4, 0xc000237f38, 0x3c)
	/home/travis/.gimme/versions/go1.11.9.linux.amd64/src/io/io.go:329 +0x58
github.com/weaveworks/mesh.(*lengthPrefixTCPReceiver).Receive(0xc0001fdc10, 0x0, 0x0, 0xfec, 0xfec, 0x0)
	/home/travis/gopath/src/github.com/weaveworks/mesh/protocol_crypto.go:168 +0x96
github.com/weaveworks/mesh.(*LocalConnection).receiveTCP(0xc00015e960, 0x8e2060, 0xc0001fdc10)
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:420 +0x56
created by github.com/weaveworks/mesh.(*LocalConnection).run
	/home/travis/gopath/src/github.com/weaveworks/mesh/connection.go:247 +0x734
exit status 2
FAIL	github.com/iwanbk/bcache	6.019s
travis_time:end:00be5070:start=1555427346315028359,finish=1555427358937196900,duration=12622168541
�[0K�[31;1mThe command "go test -tags integration -coverprofile=coverage.txt -covermode=atomic" exited with 1.�[0m



Done. Your build exited with 1.

Scaling limits and full examples?

Hello,

I have been investigating distributed KV libraries for a P2P project that will basically spread out a database across many hundreds of noes.

I look at Groupcache but then came across your work and am wondering how well it scales?

Also, are there any full examples that I can compile and run to set up a small cluster to test?

Thanks

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