Issue 1:
sometimes, you can get a large array of flakes due to oome errors.

+++ [0307 09:08:06] Building go targets for linux/amd64:
cmd/hyperkube
+++ [0307 09:08:27] Placing binaries
SUCCESS
Verifying ./hack/../hack/verify-flags-underscore.py
SUCCESS
+ ./hack/test-go.sh
Running tests for APIVersion: v1,extensions/v1beta1,metrics/v1alpha1 with etcdPrefix: registry
+++ [0307 09:08:51] Running tests without code coverage
# testmain
fatal error: runtime: out of memory

runtime stack:
runtime.throw(0x698ac0, 0x16)
/usr/local/go/src/runtime/panic.go:527 +0x90
runtime.sysMap(0xc82b8f0000, 0x1100000, 0x42f800, 0x7b0258)
/usr/local/go/src/runtime/mem_linux.go:203 +0x9b
runtime.mHeap_SysAlloc(0x791840, 0x1100000, 0x0)
/usr/local/go/src/runtime/malloc.go:426 +0x160
runtime.mHeap_Grow(0x791840, 0x880, 0x0)
/usr/local/go/src/runtime/mheap.go:628 +0x63
runtime.mHeap_AllocSpanLocked(0x791840, 0x880, 0x100)
/usr/local/go/src/runtime/mheap.go:532 +0x5f1
runtime.mHeap_Alloc_m(0x791840, 0x880, 0x100000000, 0xc800000001)
/usr/local/go/src/runtime/mheap.go:425 +0x1ac
runtime.mHeap_Alloc.func1()
/usr/local/go/src/runtime/mheap.go:484 +0x41
runtime.systemstack(0xc820095ee0)
/usr/local/go/src/runtime/asm_amd64.s:278 +0xab
runtime.mHeap_Alloc(0x791840, 0x880, 0x10100000000, 0x41348f)
/usr/local/go/src/runtime/mheap.go:485 +0x63
runtime.largeAlloc(0x1100000, 0x0, 0x0)
/usr/local/go/src/runtime/malloc.go:748 +0xb3
runtime.mallocgc.func3()
/usr/local/go/src/runtime/malloc.go:637 +0x33
runtime.systemstack(0xc8204e2c40)
/usr/local/go/src/runtime/asm_amd64.s:262 +0x79
runtime.mstart()
/usr/local/go/src/runtime/proc1.go:668

and

ok k8s.io/kubernetes/pkg/kubelet/qos 1.# testmain
fatal error: runtime: out of memory

runtime stack:
runtime.throw(0x698ac0, 0x16)
/usr/local/go/src/runtime/panic.go:527 +0x90
runtime.sysMap(0xc83c4f0000, 0x100000, 0x68b00, 0x7b0258)
/usr/local/go/src/runtime/mem_linux.go:203 +0x9b
runtime.mHeap_SysAlloc(0x791840, 0x100000, 0x0)
/usr/local/go/src/runtime/malloc.go:426 +0x160
runtime.mHeap_Grow(0x791840, 0x50, 0x0)
/usr/local/go/src/runtime/mheap.go:628 +0x63
runtime.mHeap_AllocSpanLocked(0x791840, 0x4b, 0x7fc647a6ad90)
/usr/local/go/src/runtime/mheap.go:532 +0x5f1
runtime.mHeap_Alloc_m(0x791840, 0x4b, 0x100000000, 0x7fc647a6ad90)
/usr/local/go/src/runtime/mheap.go:425 +0x1ac
runtime.mHeap_Alloc.func1()
/usr/local/go/src/runtime/mheap.go:484 +0x41
runtime.systemstack(0xc8204fdee0)
/usr/local/go/src/runtime/asm_amd64.s:278 +0xab
runtime.mHeap_Alloc(0x791840, 0x4b, 0x100000000, 0x7fc647a6adf0)
/usr/local/go/src/runtime/mheap.go:485 +0x63
runtime.largeAlloc(0x96000, 0x3, 0xc83c462000)
/usr/local/go/src/runtime/malloc.go:748 +0xb3
runtime.mallocgc.func3()
/usr/local/go/src/runtime/malloc.go:637 +0x33
runtime.systemstack(0xc820028000)
/usr/local/go/src/runtime/asm_amd64.s:262 +0x79
runtime.mstart()
/usr/local/go/src/runtime/proc1.go:668

goroutine 1 [running]:

and so on

Issue 2:
Project: kubernetes-jenkins-pull
Zone: us-central1-b
+++ [0307 10:43:30] Verifying Prerequisites....
+++ [0307 10:43:40] Building Docker image kube-build:build-8f5624d469.
+++ [0307 10:44:35] Running build command....
+++ [0307 10:44:36] Creating data container
Go version: go version go1.4.2 linux/amd64
+++ [0307 10:44:48] Multiple platforms requested and available 58G >= threshold 11G, building platforms in parallel
+++ [0307 10:44:48] Building go targets for linux/amd64
linux/arm in parallel (output will appear in a burst when complete):
cmd/kube-proxy
cmd/kube-apiserver
cmd/kube-controller-manager
cmd/kubelet
cmd/kubemark
cmd/hyperkube
cmd/linkcheck
plugin/cmd/kube-scheduler
+++ [0307 10:44:49] linux/amd64: go build started
go build github.com/coreos/go-semver/semver: /usr/src/go/pkg/tool/linux_amd64/6g: fork/exec /usr/src/go/pkg/tool/linux_amd64/6g: cannot allocate memory
!!! Error in /go/src/k8s.io/kubernetes/hack/lib/golang.sh:433
'go install "${goflags[@]:+${goflags[@]}}" -ldflags "${goldflags}" "${nonstatics[@]:+${nonstatics[@]}}"' exited with status 1
Call stack:
1: /go/src/k8s.io/kubernetes/hack/lib/golang.sh:433 kube::golang::build_binaries_for_platform(...)
2: /go/src/k8s.io/kubernetes/hack/lib/golang.sh:557 kube::golang::build_binaries(...)
3: hack/build-cross.sh:28 main(...)