I’m staring at a git blame from three years ago and I want to scream. The coffee is cold. My eyes feel like they’ve been scrubbed with industrial-grade sandpaper. The sun is coming up, and for the third day in a row, I’m watching the kubectl get pods -A output scroll past like a digital … Read more
Stop Building “Go React” Apps Like It’s 2015 I once spent thirty-six hours straight in a windowless “war room” because of a single http.ResponseWriter that didn’t have its header set correctly. We were running a Go-based microservice that served a React dashboard for a Tier-1 telco. The React app was making thousands of concurrent requests … Read more
Sit down. Shut up. And look at this screen. I’ve spent thirty years in the trenches. I’ve written assembly for flight controllers where a single bit-flip meant a smoking crater in the desert. I’ve squeezed kernels into 4KB of ROM. I’ve spent weeks hunting down a single pointer alignment issue that only manifested at high … Read more
text [2024-05-14 03:14:22.891] [CRITICAL] [worker-72] Uncaught exception: ValueError: Input contains NaN, infinity or a value too large for dtype(‘float32’). [2024-05-14 03:14:22.892] [ERROR] [gunicorn.error] Worker (pid:1402) exited with code 1 [2024-05-14 03:14:23.001] [INFO] [k8s-event] Pod icarus-inference-v2-7f9db88f-xlk2j restarted. Reason: CrashLoopBackOff [2024-05-14 03:14:24.445] [CRITICAL] [upstream-proxy] 502 Bad Gateway – No healthy upstream hosts in cluster ‘icarus_service’ [2024-05-14 03:14:25.110] … Read more
INCIDENT LOG: 2024-05-14T03:14:22Z [03:14:22] Kubelet: Warning FailedScheduling – 0/12 nodes are available: 12 Insufficient memory. [03:15:01] Node-04: Kernel: [124098.44] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/kubepods/besteffort/pod-abc,task=node,pid=14221,uid=0 [03:15:01] Node-04: Kernel: Out of memory: Killed process 14221 (node) total-vm:4.2GB, anon-rss:1.8GB, file-rss:0B, shmem-rss:0B [03:16:45] PagerDuty: [CRITICAL] Production API – High Error Rate (98%) [03:17:10] me@workstation:~$ docker pull registry.internal/app:latest Error response from daemon: manifest for … Read more
INCIDENT REPORT: #882-BRAVO-TANGO TIMESTAMP: 2023-10-14 03:14:22 UTC STATUS: RESOLVED (After 72 hours of manual state recovery) SYSTEM: Real-time Analytics Ingestion Engine (The “Data-Sucker-9000”) PRIMARY ON-CALL: Senior SRE (Current Mood: Resignation Letter is drafted) 1. Incident Summary At 03:14 UTC, the primary ingestion cluster for our “Real-time Analytics Dashboard” didn’t just fail; it committed ritualistic suicide. … Read more
[2023-10-12 04:12:01] ALERT: Multiple failed SSH logins from 192.168.1.105 [2023-10-12 04:12:05] CRITICAL: Root access granted to ‘admin’ via deprecated TLS 1.0 [2023-10-12 04:12:10] SYSTEM: Database dump initiated… Look at that. Take a long, hard look at those three lines of logs. That is the sound of a multi-million dollar "unicorn" called CloudZest bleeding out on … Read more
text <— 2024-05-22 03:14:09.442 —> FATAL ERROR: Reached heap limit Allocation failed – JavaScript heap out of memory 1: 0x10505c668 node::Abort() [/usr/local/bin/node] 2: 0x10505c7e8 node::OnFatalError(char const, char const) [/usr/local/bin/node] 3: 0x1051f49a4 v8::Utils::ApiCheck(bool, char const, char const) [/usr/local/bin/node] 4: 0x105898330 v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate, char const, bool) [/usr/local/bin/node] 5: 0x105a563b8 v8::internal::Heap::FatalProcessOutOfMemory(char const) [/usr/local/bin/node] 6: 0x105a538e0 v8::internal::Heap::RecomputeLimits(v8::internal::GarbageCollector) [/usr/local/bin/node] 7: 0x105a6a1a4 … Read more
2024-10-24T03:14:07.821Z [ERROR] controller-runtime.manager.controller.pod-lifecycle-controller: Reconciler error {“error”: “failed to allocate IP from CIDR block 10.128.0.0/24: address already in use by peer-vpc-02-us-east-1”, “stacktrace”: “github.com/kubernetes-sigs/controller-runtime/pkg/internal/controller.(*Controller).reconcileHandler\n\t/go/pkg/mod/github.com/kubernetes-sigs/[email protected]/pkg/internal/controller/controller.go:329”} 2024-10-24T03:14:08.001Z [WARN] kubelet: Readiness probe failed: HTTP probe failed with statuscode: 503 for container “api-gateway” (pod “api-gateway-7f8d9b4c5-xk2m9_prod”) 2024-10-24T03:14:08.112Z [FATAL] kernel: [192837.441] Out of memory: Kill process 29384 (envoy) score 942 or sacrifice child … Read more
[2023-10-27 03:14:22,891] ERROR: [Worker-7] MainProcess: Uncaught exception: MemoryError File “/usr/local/lib/python3.11/site-packages/pandas/core/internals/blocks.py”, line 393, in grow_labels new_labels = np.empty(new_shape, dtype=labels.dtype) numpy.core._exceptions._ArrayMemoryError: Unable to allocate 14.2 GiB for an array with shape (1905421, 1000) and data type float64 File “/app/models/recommender.py”, line 142, in predict X_transformed = self.pipeline.transform(raw_data) File “/usr/local/lib/python3.11/site-packages/sklearn/pipeline.py”, line 549, in transform Xt = transform.transform(Xt) File “/usr/local/lib/python3.11/site-packages/sklearn/preprocessing/_encoders.py”, … Read more