fatal error: runtime: out of memory

runtime stack:
runtime.throw(0x85b7b0, 0x16)
    /opt/go/src/runtime/panic.go:566 +0x95
runtime.sysMap(0xc488810000, 0x100000, 0x7fab601e5100, 0xddbc18)
    /opt/go/src/runtime/mem_linux.go:219 +0x1d0
runtime.(*mheap).sysAlloc(0xdc2960, 0x100000, 0x7fab00000001)
    /opt/go/src/runtime/malloc.go:407 +0x37a
runtime.(*mheap).grow(0xdc2960, 0x51, 0x0)
    /opt/go/src/runtime/mheap.go:726 +0x62
runtime.(*mheap).allocSpanLocked(0xdc2960, 0x51, 0x2000)
    /opt/go/src/runtime/mheap.go:630 +0x4f2
runtime.(*mheap).alloc_m(0xdc2960, 0x51, 0x7f0100000000, 0x416a39)
    /opt/go/src/runtime/mheap.go:515 +0xe0
runtime.(*mheap).alloc.func1()
    /opt/go/src/runtime/mheap.go:579 +0x4b
runtime.systemstack(0x7fab60cfedd8)
    /opt/go/src/runtime/asm_amd64.s:314 +0xab
runtime.(*mheap).alloc(0xdc2960, 0x51, 0x10100000000, 0x2b)
    /opt/go/src/runtime/mheap.go:580 +0x73
runtime.largeAlloc(0xa0508, 0x7fab63cfc001, 0xc40000002b)
    /opt/go/src/runtime/malloc.go:774 +0x93
runtime.mallocgc.func1()
    /opt/go/src/runtime/malloc.go:669 +0x3e
runtime.systemstack(0xc42001a000)
    /opt/go/src/runtime/asm_amd64.s:298 +0x79
runtime.mstart()
    /opt/go/src/runtime/proc.go:1079

goroutine 1 [running]:
runtime.systemstack_switch()
    /opt/go/src/runtime/asm_amd64.s:252 fp=0xc422f6d430 sp=0xc422f6d428
runtime.mallocgc(0xa0508, 0x7fbaa0, 0x1, 0xa)
    /opt/go/src/runtime/malloc.go:670 +0x903 fp=0xc422f6d4d0 sp=0xc422f6d430
runtime.newobject(0x7fbaa0, 0xa)
    /opt/go/src/runtime/malloc.go:785 +0x38 fp=0xc422f6d500 sp=0xc422f6d4d0
compress/flate.NewWriter(0xda3860, 0xc441238da8, 0xffffffffffffffff, 0xa, 0xa, 0x0)
    /opt/go/src/compress/flate/deflate.go:660 +0x31 fp=0xc422f6d548 sp=0xc422f6d500
compress/gzip.(*Writer).Write(0xc422319290, 0xc4887ac000, 0xa2, 0x1000, 0x7fab63cfc000, 0xc42225cc2b, 0xc4887ac000)
    /opt/go/src/compress/gzip/gzip.go:190 +0x2c4 fp=0xc422f6d598 sp=0xc422f6d548
github.com/mongodb/mongo-tools/mongodump.(*wrappedWriteCloser).Write(0xc42225cc40, 0xc4887ac000, 0xa2, 0x1000, 0x0, 0xc422319290, 0xc4200c4400)
    <autogenerated>:1 +0x6b fp=0xc422f6d5e0 sp=0xc422f6d598
github.com/mongodb/mongo-tools/mongodump.(*realMetadataFile).Write(0xc421849620, 0xc4887ac000, 0xa2, 0x1000, 0x53b2d6, 0xc4887ac000, 0xc487351200)
    <autogenerated>:32 +0x6b fp=0xc422f6d628 sp=0xc422f6d5e0
bufio.(*Writer).flush(0xc422f6d968, 0xa2, 0x0)
    /opt/go/src/bufio/bufio.go:563 +0x75 fp=0xc422f6d688 sp=0xc422f6d628
bufio.(*Writer).Flush(0xc422f6d968, 0xc487351200, 0xa2)
    /opt/go/src/bufio/bufio.go:552 +0x2b fp=0xc422f6d6b0 sp=0xc422f6d688
github.com/mongodb/mongo-tools/mongodump.(*MongoDump).dumpMetadata(0xc4200ec140, 0xc4208e8880, 0x0, 0x0)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/.gopath/src/github.com/mongodb/mongo-tools/mongodump/metadata_dump.go:102 +0xd6a fp=0xc422f6d9b8 sp=0xc422f6d6b0
github.com/mongodb/mongo-tools/mongodump.(*MongoDump).DumpMetadata(0xc4200ec140, 0x8686ec, 0x36)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/.gopath/src/github.com/mongodb/mongo-tools/mongodump/mongodump.go:730 +0xa4 fp=0xc422f6da00 sp=0xc422f6d9b8
github.com/mongodb/mongo-tools/mongodump.(*MongoDump).Dump(0xc4200ec140, 0x0, 0x0)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/.gopath/src/github.com/mongodb/mongo-tools/mongodump/mongodump.go:301 +0x2e1 fp=0xc422f6dd50 sp=0xc422f6da00
main.main()
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/mongodump/main/mongodump.go:63 +0x311 fp=0xc422f6ded8 sp=0xc422f6dd50
runtime.main()
    /opt/go/src/runtime/proc.go:183 +0x1f4 fp=0xc422f6df30 sp=0xc422f6ded8
runtime.goexit()
    /opt/go/src/runtime/asm_amd64.s:2086 +0x1 fp=0xc422f6df38 sp=0xc422f6df30

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
    /opt/go/src/runtime/asm_amd64.s:2086 +0x1

goroutine 5 [syscall]:
os/signal.signal_recv(0x0)
    /opt/go/src/runtime/sigqueue.go:116 +0x157
os/signal.loop()
    /opt/go/src/os/signal/signal_unix.go:22 +0x22
created by os/signal.init.1
    /opt/go/src/os/signal/signal_unix.go:28 +0x41

goroutine 19 [select]:
gopkg.in/mgo%2ev2.(*mongoCluster).syncServersLoop(0xc4200d0100)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/gopkg.in/mgo.v2/cluster.go:394 +0x3b3
created by gopkg.in/mgo%2ev2.newCluster
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/gopkg.in/mgo.v2/cluster.go:78 +0x194

goroutine 23 [sleep]:
time.Sleep(0x37e11d600)
    /opt/go/src/runtime/time.go:59 +0xe1
gopkg.in/mgo%2ev2.(*mongoServer).pinger(0xc4200e41c0, 0xc4200d4b01)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/gopkg.in/mgo.v2/server.go:301 +0x286
created by gopkg.in/mgo%2ev2.newServer
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/gopkg.in/mgo.v2/server.go:89 +0x15f

goroutine 16 [IO wait]:
net.runtime_pollWait(0x7fab63ca4f28, 0x72, 0x4)
    /opt/go/src/runtime/netpoll.go:160 +0x59
net.(*pollDesc).wait(0xc4200543e0, 0x72, 0xc420033bd0, 0xc42000e1c0)
    /opt/go/src/net/fd_poll_runtime.go:73 +0x38
net.(*pollDesc).waitRead(0xc4200543e0, 0xda4920, 0xc42000e1c0)
    /opt/go/src/net/fd_poll_runtime.go:78 +0x34
net.(*netFD).Read(0xc420054380, 0xc420140000, 0x4000, 0x4000, 0x0, 0xda4920, 0xc42000e1c0)
    /opt/go/src/net/fd_unix.go:243 +0x1a1
net.(*conn).Read(0xc420026148, 0xc420140000, 0x4000, 0x4000, 0x0, 0x0, 0x0)
    /opt/go/src/net/net.go:173 +0x70
github.com/spacemonkeygo/openssl.(*readBio).ReadFromOnce(0xc4200d2ed0, 0x7fab63ca5010, 0xc420026148, 0x0, 0x0, 0x0)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/github.com/spacemonkeygo/openssl/bio.go:298 +0x137
github.com/spacemonkeygo/openssl.(*Conn).fillInputBuffer(0xc4200173b0, 0xa0c908, 0xc4200173b0)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/github.com/spacemonkeygo/openssl/conn.go:214 +0x6d
github.com/spacemonkeygo/openssl.(*Conn).getErrorHandler.func3(0x0, 0x0)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/github.com/spacemonkeygo/openssl/conn.go:257 +0x87
github.com/spacemonkeygo/openssl.(*Conn).handleError(0xc4200173b0, 0xc42225c860, 0x24, 0x24)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/github.com/spacemonkeygo/openssl/conn.go:294 +0x2c
github.com/spacemonkeygo/openssl.(*Conn).Read(0xc4200173b0, 0xc4200dbad0, 0x24, 0x24, 0xc400000000, 0x0, 0x0)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/github.com/spacemonkeygo/openssl/conn.go:485 +0xd8
gopkg.in/mgo%2ev2.fill(0xda9b00, 0xc4200173b0, 0xc4200dbad0, 0x24, 0x24, 0x0, 0x143)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/gopkg.in/mgo.v2/socket.go:535 +0x53
gopkg.in/mgo%2ev2.(*mongoSocket).readLoop(0xc4200c22a0)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/gopkg.in/mgo.v2/socket.go:551 +0x125
created by gopkg.in/mgo%2ev2.newSocket
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/gopkg.in/mgo.v2/socket.go:194 +0x278

goroutine 48 [IO wait]:
net.runtime_pollWait(0x7fab63ca4da8, 0x72, 0x5)
    /opt/go/src/runtime/netpoll.go:160 +0x59
net.(*pollDesc).wait(0xc4200546f0, 0x72, 0xc420039bd0, 0xc42000e1c0)
    /opt/go/src/net/fd_poll_runtime.go:73 +0x38
net.(*pollDesc).waitRead(0xc4200546f0, 0xda4920, 0xc42000e1c0)
    /opt/go/src/net/fd_poll_runtime.go:78 +0x34
net.(*netFD).Read(0xc420054690, 0xc420176000, 0x4000, 0x4000, 0x0, 0xda4920, 0xc42000e1c0)
    /opt/go/src/net/fd_unix.go:243 +0x1a1
net.(*conn).Read(0xc4200261d0, 0xc420176000, 0x4000, 0x4000, 0x0, 0x0, 0x0)
    /opt/go/src/net/net.go:173 +0x70
github.com/spacemonkeygo/openssl.(*readBio).ReadFromOnce(0xc4200d3560, 0x7fab63ca5010, 0xc4200261d0, 0x0, 0x0, 0x0)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/github.com/spacemonkeygo/openssl/bio.go:298 +0x137
github.com/spacemonkeygo/openssl.(*Conn).fillInputBuffer(0xc420017450, 0xa0c908, 0xc420017450)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/github.com/spacemonkeygo/openssl/conn.go:214 +0x6d
github.com/spacemonkeygo/openssl.(*Conn).getErrorHandler.func3(0x0, 0x0)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/github.com/spacemonkeygo/openssl/conn.go:257 +0x87
github.com/spacemonkeygo/openssl.(*Conn).handleError(0xc420017450, 0xc4226c7000, 0x24, 0x24)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/github.com/spacemonkeygo/openssl/conn.go:294 +0x2c
github.com/spacemonkeygo/openssl.(*Conn).Read(0xc420017450, 0xc4200d3680, 0x24, 0x24, 0xc400000000, 0x0, 0x0)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/github.com/spacemonkeygo/openssl/conn.go:485 +0xd8
gopkg.in/mgo%2ev2.fill(0xda9b00, 0xc420017450, 0xc4200d3680, 0x24, 0x24, 0x0, 0x11)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/gopkg.in/mgo.v2/socket.go:535 +0x53
gopkg.in/mgo%2ev2.(*mongoSocket).readLoop(0xc4200c27e0)
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/gopkg.in/mgo.v2/socket.go:551 +0x125
created by gopkg.in/mgo%2ev2.newSocket
    /data/mci/a14c5558b74628cd270022f09d97a509/src/mongo-tools/vendor/src/gopkg.in/mgo.v2/socket.go:194 +0x278