Фатальный недостаток Node.js
- 1. Фатальный недостаток Node.js Алексей Охрименко - IPONWEB
- 6. 99.9%
- 9. const http = require('http'); const hostname = '127.0.0.1'; const port = 3000; const server = http.createServer((req, res) => { res.statusCode = 200; res.setHeader('Content-Type', 'text/plain'); res.end('Hello Worldn'); }); server.listen(port, hostname, () => { console.log(`Server running at http://${hostname}:${port}/`); });
- 13. process.on('uncaughtException', (err) => { console.log(`Caught exception: ${err}`); });
- 14. process.on('uncaughtException', (err) => { console.log(`Caught exception: ${err}`); }); async / await
- 15. process.on('uncaughtException', (err) => { console.log(`Caught exception: ${err}`); }); async / await promise
- 16. process.on('uncaughtException', (err) => { console.log(`Caught exception: ${err}`); }); async / await promise замыкания
- 17. process.on('uncaughtException', (err) => { console.log(`Caught exception: ${err}`); }); async / await promise замыкания stacktraces
- 20. process.on('uncaughtException', (err) => { console.log(`Caught exception: ${err}`); }); ???
- 21. После uncaughtException • Immediate Shutdown • Graceful Shutdown
- 22. Immediate Shutdown (убиться сразу)
- 23. Immediate Shutdown (убиться сразу)
- 24. Immediate Shutdown (убиться сразу) 500 500 500
- 25. Immediate Shutdown (убиться сразу) 500 200 200 10 секунд подождать
- 26. Graceful Shutdown (убиться красиво)
- 27. Graceful Shutdown (убиться красиво)
- 28. Graceful Shutdown (убиться красиво)
- 29. 5 лет спустя
- 30. Graceful Shutdown (убиться красиво) 200 200
- 31. Graceful Shutdown (убиться красиво) 200 200
- 32. Graceful Shutdown (убиться красиво) 200 200 10 секунд уже потрачено 500
- 33. process.on('uncaughtException', (err) => { console.log(`Caught exception: ${err}`); }); ???
- 36. https://github.com/mattinsler/longjohn Uncaught Error: foo at f (index.html:24:23) ---------------------------------------- at setTimeout at onload (index.html:28:40)
- 37. Uncaught Error: foo at USER_NAME_MASHA (index.html:24:23) ---------------------------------------- at setTimeout at onload (index.html:28:40)
- 38. Uncaught Error: foo at USER_NAME_MASHA (index.html:24:23) ---------------------------------------- at setTimeout at onload (index.html:28:40) rename function 1000 callbacks 10 callbacks
- 39. Clusters
- 40. Clusters
- 41. Clusters
- 42. Clusters
- 43. Clusters
- 44. Domains
- 45. Domains
- 48. Для Async-Hooks - все ресурс (объект)
- 54. new Promise((res, rej) => {}) init before after destroy
- 55. async_hooks.createHook({ init, before, after, destroy })
- 59. setTimeout(() => { setTimeout(() => {}) }) AsyncID: 0 AsyncID: 0
- 60. setTimeout(() => { setTimeout(() => {}) }) AsyncID: 1 AsyncID: 0
- 61. setTimeout(() => { setTimeout(() => {}) }) AsyncID: 1 AsyncID: 1
- 62. setTimeout(() => { setTimeout(() => {}) }) AsyncID: 1 AsyncID: 2
- 63. setTimeout(() => { setTimeout(() => {}) }) AsyncID: 1 AsyncID: 2 TriggerID: 1
- 64. setTimeout(() => { setTimeout(() => {}) }) AsyncID: 1 AsyncID: 2 TriggerID: 1
- 65. TCPWRAP(2): trigger: 1 execution: 1 TickObject(3): trigger: 2 execution: 1 before: 3 Timeout(4): trigger: 3 execution: 3 TIMERWRAP(5): trigger: 3 execution: 3 after: 3 destroy: 3 before: 5 before: 4 TTYWRAP(6): trigger: 4 execution: 4 SIGNALWRAP(7): trigger: 4 execution: 4 TTYWRAP(8): trigger: 4 execution: 4 >>> 4 TickObject(9): trigger: 4 execution: 4 after: 4 after: 5 before: 9 after: 9 destroy: 4 destroy: 9 destroy: 5
- 67. LISP (time travel debugger)
- 69. Zone Zone.current.fork({}).run(function () { Zone.current.inTheZone = true; setTimeout(someCallback, 0); }); function someCallback() { console.log(Zone.current.inTheZone); } setTimeout(someCallback, 0);
- 70. Zone Zone.current.fork({}).run(function () { Zone.current.inTheZone = true; setTimeout(someCallback, 0); }); function someCallback() { console.log(Zone.current.inTheZone); } setTimeout(someCallback, 0);
- 71. Zone Zone.current.fork({}).run(function () { Zone.current.inTheZone = true; setTimeout(someCallback, 0); }); function someCallback() { console.log(Zone.current.inTheZone); } setTimeout(someCallback, 0);
- 72. Zone Zone.current.fork({}).run(function () { Zone.current.inTheZone = true; setTimeout(someCallback, 0); }); function someCallback() { console.log(Zone.current.inTheZone);TRUE } setTimeout(someCallback, 0);
- 73. Zone Zone.current.fork({}).run(function () { Zone.current.inTheZone = true; setTimeout(someCallback, 0); }); function someCallback() { console.log(Zone.current.inTheZone); } setTimeout(someCallback, 0);
- 74. Zone Zone.current.fork({}).run(function () { Zone.current.inTheZone = true; setTimeout(someCallback, 0); }); function someCallback() { console.log(Zone.current.inTheZone);FALSE } setTimeout(someCallback, 0);
- 75. А что делать простым смертным?