close on closed channel

[campoy]

Currently running on a new issue, I assume due to the latest version of pilosa?

These are the logs

~/go/bin/gitbase server -v -d siva --host 0.0.0.0
DEBU[0000] registered database to catalog                db=
DEBU[0000] registered all available functions in catalog 
DEBU[0000] created index storage                        
DEBU[0000] registered pilosa index driver               
INFO[0000] squash tables rule is enabled                
panic: close of closed channel
goroutine 1 [running]:
github.com/src-d/gitbase/vendor/github.com/pilosa/pilosa.(*Holder).Open(0xc0002e19a0, 0x0, 0x0)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/github.com/pilosa/pilosa/holder.go:153 +0x2f1
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/index/pilosa.(*Driver).LoadAll(0xc0003ad580, 0x0, 0x0, 0x1139e66, 0xb, 0x0, 0x0, 0x0, 0x0, 0x0)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/index/pilosa/driver.go:155 +0x264
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql.(*IndexRegistry).LoadIndexes(0xc0002e1720, 0xc0002c8d50, 0x1, 0x1, 0x0, 0x0)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/index.go:215 +0x39d
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server%2ev0.(*Engine).Init(0xc0002c8d40, 0x1, 0x1)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/engine.go:99 +0x4c
github.com/src-d/gitbase/cmd/gitbase/command.(*Server).buildDatabase(0xc0001d0fd0, 0x0, 0x0)
        /home/francesc/go/src/github.com/src-d/gitbase/cmd/gitbase/command/server.go:201 +0x2b4
github.com/src-d/gitbase/cmd/gitbase/command.(*Server).Execute(0xc0001d0fd0, 0xc00015d320, 0x0, 0x6, 0x0, 0x0)
        /home/francesc/go/src/github.com/src-d/gitbase/cmd/gitbase/command/server.go:108 +0x60
github.com/src-d/gitbase/vendor/github.com/jessevdk/go-flags.(*Parser).ParseArgs(0xc00015d2c0, 0xc000194010, 0x6, 0x6, 0xc0002c8c20, 0x1, 0x2, 0xc000280510, 0xc000234500)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/github.com/jessevdk/go-flags/parser.go:316 +0x800
github.com/src-d/gitbase/vendor/github.com/jessevdk/go-flags.(*Parser).Parse(0xc00015d2c0, 0x1100a43, 0x7, 0x11c7713, 0x1c, 0x11c7713)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/github.com/jessevdk/go-flags/parser.go:186 +0x71
main.main()
        /home/francesc/go/src/github.com/src-d/gitbase/cmd/gitbase/main.go:51 +0x39d

[campoy]

After deleting the /var/lib/gitbase/index directory it started working again, so now I'm wondering whether the problem was a specific index that was corrupted.

[campoy]

After investigating a bit more it could be the case that this request caused a panic:

SELECT *
FROM (SELECT language, COUNT(repository_id) AS repository_count
      FROM   (SELECT DISTINCT
                r.repository_id,
                LANGUAGE(t.tree_entry_name, b.blob_content) AS language
              FROM   refs r
                      JOIN commits c ON r.commit_hash = c.commit_hash
                      JOIN commit_trees ct ON c.commit_hash = ct.commit_hash
                      JOIN tree_entries t ON ct.tree_hash = t.tree_hash
                      JOIN blobs b ON t.blob_hash = b.blob_hash
              WHERE  r.ref_name = 'HEAD') AS q1
      GROUP  BY language) AS q2
ORDER  BY repository_count DESC 

and that might have caused the corruption on the index.

The details on the crush under the details.

Details

francesc@instance-4:~$ cat ~/log
time="2018-10-05T01:38:32Z" level=debug msg="repository added" path=/home/francesc/repos/TypeScript
time="2018-10-05T01:38:32Z" level=debug msg="repository added" path=/home/francesc/repos/dotnet
time="2018-10-05T01:38:32Z" level=debug msg="repository added" path=/home/francesc/repos/vscode
time="2018-10-05T01:38:32Z" level=debug msg="registered database to catalog" db=
time="2018-10-05T01:38:32Z" level=debug msg="registered all available functions in catalog"
time="2018-10-05T01:38:32Z" level=debug msg="created index storage"
time="2018-10-05T01:38:32Z" level=debug msg="registered pilosa index driver"
time="2018-10-05T01:38:32Z" level=info msg="squash tables rule is enabled"
time="2018-10-05T01:38:32Z" level=info msg="server started and listening on 0.0.0.0:3306"
time="2018-10-05T01:38:38Z" level=info msg="NewConnection: client 1"
time="2018-10-05T01:38:38Z" level=debug msg="executing query" query="\nSELECT *\nFROM (SELECT language, COUNT(repository_id) AS repository_count\n      FROM   (SELECT DISTINCT\n                r.repository_id,\n                LANGUAGE(t.tree_entry_name, b.blob_content) AS language\n              FROM   refs r\n                      JOIN commits c ON r.commit_hash = c.commit_hash\n                      JOIN commit_trees ct ON c.commit_hash = ct.commit_hash\n                      JOIN tree_entries t ON ct.tree_hash = t.tree_hash\n                      JOIN blobs b ON t.blob_hash = b.blob_hash\n              WHERE  r.ref_name = 'HEAD') AS q1\n      GROUP  BY language) AS q2\nORDER  BY repository_count DESC \n"
fatal error: unexpected signal during runtime execution
[signal SIGSEGV: segmentation violation code=0x2 addr=0x7fd6871af000 pc=0x7fd68cdcce2f]
runtime stack:
runtime.throw(0x11eb922, 0x2a)
        /usr/local/go/src/runtime/panic.go:608 +0x72
runtime.sigpanic()
        /usr/local/go/src/runtime/signal_unix.go:374 +0x2f2
goroutine 79 [syscall]:
runtime.cgocall(0xe4f670, 0xc03cb92e48, 0x29)
        /usr/local/go/src/runtime/cgocall.go:128 +0x5e fp=0xc03cb92e10 sp=0xc03cb92dd8 pc=0x4078de
github.com/src-d/gitbase/vendor/github.com/moovweb/rubex._Cfunc_SearchOnigRegex(0xc00ca25800, 0x249000003cb, 0x0, 0x34832c0, 0x347f290, 0x34826b0, 0x0, 0xc01fe7fe80, 0xc02d8100f0, 0xc000000000)
        _cgo_gotypes.go:285 +0x50 fp=0xc03cb92e48 sp=0xc03cb92e10 pc=0x8a9ed0
github.com/src-d/gitbase/vendor/github.com/moovweb/rubex.(*Regexp).find.func1(0xc00ca25800, 0x249000003cb, 0x0, 0x34832c0, 0x347f290, 0x34826b0, 0x0, 0xc01fe7fe80, 0xc02d8100f0, 0xad95023600000244)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/github.com/moovweb/rubex/regex.go:178 +0x144 fp=0xc03cb92ea8 sp=0xc03cb92e48 pc=0x8afe64
github.com/src-d/gitbase/vendor/github.com/moovweb/rubex.(*Regexp).find(0xc0001a18b0, 0xc00ca25800, 0x3cb, 0x600, 0x3cb, 0x249, 0xc00ed23740, 0x6, 0x6)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/github.com/moovweb/rubex/regex.go:178 +0x130 fp=0xc03cb92f70 sp=0xc03cb92ea8 pc=0x8ab090
github.com/src-d/gitbase/vendor/github.com/moovweb/rubex.(*Regexp).findAll(0xc0001a18b0, 0xc00ca25800, 0x3cb, 0x600, 0x3cb, 0xc03cb93130, 0x8ace34, 0xc0001a1860)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/github.com/moovweb/rubex/regex.go:226 +0x1b7 fp=0xc03cb93030 sp=0xc03cb92f70 pc=0x8ab5b7
github.com/src-d/gitbase/vendor/github.com/moovweb/rubex.(*Regexp).FindAllSubmatch(0xc0001a18b0, 0xc00ca25800, 0x3cb, 0x600, 0xffffffffffffffff, 0xc03cb931e0, 0xc3b68f, 0xc0001a1860)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/github.com/moovweb/rubex/regex.go:398 +0x74 fp=0xc03cb93108 sp=0xc03cb93030 pc=0x8ace34
github.com/src-d/gitbase/vendor/gopkg.in/src-d/enry.v1/internal/tokenizer.extractAndReplaceSGML(0xc00ca25800, 0x3cb, 0x600, 0x32, 0x0, 0x0, 0x0, 0x0, 0x0)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/enry.v1/internal/tokenizer/tokenize.go:148 +0x6f fp=0xc03cb931f0 sp=0xc03cb93108 pc=0xc3be9f
github.com/src-d/gitbase/vendor/gopkg.in/src-d/enry.v1/internal/tokenizer.Tokenize(0xc00ca25800, 0x3cb, 0x600, 0x3, 0xc03cb93980, 0x0)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/enry.v1/internal/tokenizer/tokenize.go:19 +0x173 fp=0xc03cb93748 sp=0xc03cb931f0 pc=0xc3b2f3
github.com/src-d/gitbase/vendor/gopkg.in/src-d/enry%2ev1.(*classifier).Classify(0x221bee0, 0xc00ca25800, 0x3cb, 0x600, 0xc02877a630, 0xc00188d000, 0x3cb, 0xc00188d000)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/enry.v1/classifier.go:47 +0x25d fp=0xc03cb939d0 sp=0xc03cb93748 pc=0xcdb92d
github.com/src-d/gitbase/vendor/gopkg.in/src-d/enry%2ev1.GetLanguagesBySpecificClassifier(0xc00ca25800, 0x3cb, 0x600, 0xc0045cfc80, 0x2, 0x2, 0x1392360, 0x221bee0, 0x0, 0x0, ...)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/enry.v1/common.go:424 +0xf9 fp=0xc03cb93a38 sp=0xc03cb939d0 pc=0xcde3f9
github.com/src-d/gitbase/vendor/gopkg.in/src-d/enry%2ev1.GetLanguagesByClassifier(0xc03be81820, 0x18, 0xc00ca25800, 0x3cb, 0x600, 0xc0045cfc80, 0x2, 0x2, 0x0, 0x0, ...)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/enry.v1/common.go:414 +0xae fp=0xc03cb93aa0 sp=0xc03cb93a38 pc=0xcde2be
github.com/src-d/gitbase/vendor/gopkg.in/src-d/enry%2ev1.GetLanguages(0xc03be81820, 0x18, 0xc00ca25800, 0x3cb, 0x600, 0x8, 0xc02d810048, 0xc000b5c640)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/enry.v1/common.go:128 +0x158 fp=0xc03cb93b58 sp=0xc03cb93aa0 pc=0xcdc458
github.com/src-d/gitbase/vendor/gopkg.in/src-d/enry%2ev1.GetLanguage(0xc03be81820, 0x18, 0xc00ca25800, 0x3cb, 0x600, 0xd169a1eef46c2500, 0xc0045cfc00)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/enry.v1/common.go:38 +0x53 fp=0xc03cb93ba8 sp=0xc03cb93b58 pc=0xcdc2b3
github.com/src-d/gitbase/internal/function.(*Language).Eval(0xc000cb14c0, 0xc03383f200, 0xc00cc6d880, 0x1a, 0x1c, 0x0, 0x0, 0x0, 0x0)
        /home/francesc/go/src/github.com/src-d/gitbase/internal/function/language.go:152 +0x1c6 fp=0xc03cb93c80 sp=0xc03cb93ba8 pc=0xce56a6
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/expression.(*Alias).Eval(0xc000cb14e0, 0xc000cd4000, 0xc00cc6d880, 0x1a, 0x1c, 0xc029cc4770, 0x0, 0x1, 0x0)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/expression/alias.go:27 +0x5f fp=0xc03cb93cd8 sp=0xc03cb93c80 pc=0x8b106f
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.filterRow(0xc000cd4000, 0xc000cb1500, 0x2, 0x2, 0xc00cc6d880, 0x1a, 0x1c, 0xc000cc10e0, 0xc000174780, 0xc03cb93df8, ...)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/project.go:147 +0xd4 fp=0xc03cb93d90 sp=0xc03cb93cd8 pc=0x8d9094
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*iter).Next(0xc000d61860, 0xc000cc1140, 0xc000174780, 0xc03cb93e38, 0x4dfdec, 0xc000cc11a0)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/project.go:133 +0xc3 fp=0xc03cb93e00 sp=0xc03cb93d90 pc=0x8d8f03
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql.(*spanIter).Next(0xc000cca450, 0xc03cb93eac, 0x3, 0x2, 0x0, 0x0)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/session.go:194 +0x47 fp=0xc03cb93e68 sp=0xc03cb93e00 pc=0x79eba7
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*exchangeRowIter).iterPartition(0xc00015cd20, 0x13935c0, 0xc000cbd380)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/exchange.go:241 +0x251 fp=0xc03cb93f98 sp=0xc03cb93e68 pc=0x8ce6d1
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*exchangeRowIter).start.func1(0xc00015cd20, 0xc00048f8c0, 0x13935c0, 0xc000cbd380)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/exchange.go:168 +0x3f fp=0xc03cb93fc0 sp=0xc03cb93f98 pc=0x8e0c5f
runtime.goexit()
        /usr/local/go/src/runtime/asm_amd64.s:1333 +0x1 fp=0xc03cb93fc8 sp=0xc03cb93fc0 pc=0x45c9f1
created by github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*exchangeRowIter).start
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/exchange.go:167 +0x10d
goroutine 1 [IO wait]:
internal/poll.runtime_pollWait(0x7fd68e2cff00, 0x72, 0x0)
        /usr/local/go/src/runtime/netpoll.go:173 +0x66
internal/poll.(*pollDesc).wait(0xc000bcc198, 0x72, 0xc00015a000, 0x0, 0x0)
        /usr/local/go/src/internal/poll/fd_poll_runtime.go:85 +0x9a
internal/poll.(*pollDesc).waitRead(0xc000bcc198, 0xffffffffffffff00, 0x0, 0x0)
        /usr/local/go/src/internal/poll/fd_poll_runtime.go:90 +0x3d
internal/poll.(*FD).Accept(0xc000bcc180, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0)
        /usr/local/go/src/internal/poll/fd_unix.go:384 +0x1a0
net.(*netFD).accept(0xc000bcc180, 0xc000bb2120, 0x44e208, 0x21920d5d0f86)
        /usr/local/go/src/net/fd_unix.go:238 +0x42
net.(*TCPListener).accept(0xc000bb2110, 0xc000bb1ad8, 0xc000bb1ae0, 0x38)
        /usr/local/go/src/net/tcpsock_posix.go:139 +0x2e
net.(*TCPListener).Accept(0xc000bb2110, 0x120a228, 0xc000bcc200, 0x13abac0, 0xc000bb2120)
        /usr/local/go/src/net/tcpsock.go:260 +0x47
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-vitess.v1/mysql.(*Listener).Accept(0xc000bcc200)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-vitess.v1/mysql/server.go:207 +0x10e
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/server.(*Server).Start(0xc000bb2118, 0x25, 0xc000bb1ce0)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/server/server.go:72 +0x2e
github.com/src-d/gitbase/cmd/gitbase/command.(*Server).Execute(0xc0001bb1e0, 0xc000b5c780, 0x0, 0x6, 0x0, 0x0)
        /home/francesc/go/src/github.com/src-d/gitbase/cmd/gitbase/command/server.go:166 +0x551
github.com/src-d/gitbase/vendor/github.com/jessevdk/go-flags.(*Parser).ParseArgs(0xc000b5c720, 0xc00003a080, 0x6, 0x6, 0xc000be0470, 0x1, 0x2, 0xc000248510, 0xc00021cf00)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/github.com/jessevdk/go-flags/parser.go:316 +0x800
github.com/src-d/gitbase/vendor/github.com/jessevdk/go-flags.(*Parser).Parse(0xc000b5c720, 0x1100a43, 0x7, 0x11c7713, 0x1c, 0x11c7713)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/github.com/jessevdk/go-flags/parser.go:186 +0x71
main.main()
        /home/francesc/go/src/github.com/src-d/gitbase/cmd/gitbase/main.go:51 +0x39d
goroutine 5 [chan receive]:
github.com/src-d/gitbase/vendor/github.com/golang/glog.(*loggingT).flushDaemon(0x221eba0)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/github.com/golang/glog/glog.go:882 +0x8b
created by github.com/src-d/gitbase/vendor/github.com/golang/glog.init.0
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/github.com/golang/glog/glog.go:410 +0x203
goroutine 7 [syscall]:
os/signal.signal_recv(0x0)
        /usr/local/go/src/runtime/sigqueue.go:139 +0x9c
os/signal.loop()
        /usr/local/go/src/os/signal/signal_unix.go:23 +0x22
created by os/signal.init.0
        /usr/local/go/src/os/signal/signal_unix.go:29 +0x41
goroutine 76 [select]:
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*exchangeRowIter).Next(0xc00015cd20, 0xc000cc1230, 0xcfc33600732fdd5, 0xc006040408, 0x1, 0x0)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/exchange.go:261 +0xdf
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*distinctIter).Next(0xc000cc41c0, 0xc0218a1120, 0x2, 0x2, 0x0, 0x0)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/distinct.go:84 +0x48
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql.(*spanIter).Next(0xc000cc1260, 0x20, 0xc00023e000, 0x5af8d9754af00000, 0x20, 0xc000c2d668)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/session.go:194 +0x47
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*trackedRowIter).Next(0xc000cc41e0, 0x1, 0x13aa200, 0xc000cbc350, 0xc0218a1120, 0x2)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/process.go:101 +0x37
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql.(*spanIter).Next(0xc000cc1290, 0xc007b0a000, 0x2, 0x2, 0xc000cb7040, 0x2)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/session.go:194 +0x47
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*groupByGroupingIter).compute(0xc000255f80, 0x1, 0x7fd68e32b000)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/group_by.go:262 +0x229
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*groupByGroupingIter).Next(0xc000255f80, 0x203000, 0xfce620, 0xc000cc12f0, 0x13976e0, 0x18)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/group_by.go:246 +0x165
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql.(*spanIter).Next(0xc000cc12c0, 0x2241430, 0x20, 0x30, 0x203000, 0x203000)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/session.go:194 +0x47
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*iter).Next(0xc000cc4200, 0x8, 0x1021a40, 0xc000cc4240, 0x1397601, 0x20)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/project.go:129 +0x38
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql.(*spanIter).Next(0xc000cc12f0, 0x13aebc0, 0xc000cab9b0, 0x41051f, 0xc000cc4240, 0x20)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/session.go:194 +0x47
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*trackedRowIter).Next(0xc000cc4220, 0x18, 0xc000cc4240, 0x0, 0x8, 0xc000cc1320)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/process.go:101 +0x37
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql.(*spanIter).Next(0xc000cc1320, 0xc00004a070, 0xc00004a000, 0xc000caba00, 0x8c4d53, 0x8)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/session.go:194 +0x47
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*sortIter).computeSortedRows(0xc000cc2440, 0x41051f, 0xc000bb7a90)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/sort.go:202 +0x6c
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*sortIter).Next(0xc000cc2440, 0xc000cabab0, 0x410da8, 0x48, 0x48, 0xc000bb7a90)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/sort.go:180 +0xbe
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql.(*spanIter).Next(0xc000cc1350, 0x2, 0xc000cabb20, 0x410da8, 0x50, 0x103d9c0)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/session.go:194 +0x47
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*trackedRowIter).Next(0xc000cc4240, 0xc000bb7a90, 0x2, 0xc000cbd370, 0x2, 0x2)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/process.go:101 +0x37
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/server.(*Handler).ComQuery(0xc000b74c20, 0xc000bd8270, 0xc000bde000, 0x279, 0xc000b74d20, 0x279, 0x2241430)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/server/handler.go:107 +0x1dd
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-vitess.v1/mysql.(*Listener).handle(0xc000bcc200, 0x13abac0, 0xc000bb2120, 0x1, 0xbee5ce0796588490, 0x178fd3c46, 0x221e860)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-vitess.v1/mysql/server.go:417 +0x1a3c
created by github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-vitess.v1/mysql.(*Listener).Accept
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-vitess.v1/mysql/server.go:221 +0xf4
goroutine 77 [semacquire]:
sync.runtime_Semacquire(0xc00048f8c8)
        /usr/local/go/src/runtime/sema.go:56 +0x39
sync.(*WaitGroup).Wait(0xc00048f8c0)
        /usr/local/go/src/sync/waitgroup.go:130 +0x64
github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*exchangeRowIter).start(0xc00015cd20)
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/exchange.go:161 +0x23a
created by github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan.(*exchangeRowIter).Next
        /home/francesc/go/src/github.com/src-d/gitbase/vendor/gopkg.in/src-d/go-mysql-server.v0/sql/plan/exchange.go:258 +0x220

[jfontan]

The fix is in go-mysql-server. Updating it should fix the problem. I leave this open until it's updated.