error while running build (npm start/ng test) - JavaScript heap out of memory exception (intermittent )

[amitagt007]

🐞 Bug report

Command (mark with an x)

• new
• [x ] build
• [x ] serve
• [ x] test
• e2e
• generate
• add
• update
• lint
• extract-i18n
• run
• config
• help
• version
• doc

Description

updated from angular 10 to 12 version. after that while running ng serve . ng test getting below error-

'FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory'

🔬 Minimal Reproduction

run npm start / ng test, getting the exception and build not successful. modified node config, still intermittently its coming

package config -
"scripts": {
"ng": "ng",
"start": "node --max_old_space_size=3000000 ./node_modules/@angular/cli/bin/ng serve --host 0.0.0.0 --disable-host-check",
"build": "node --max_old_space_size=3000000 ./node_modules/@angular/cli/bin/ng build",
"test": "node --max_old_space_size=3000000 ./node_modules/@angular/cli/bin/ng test",
"lint": "ng lint",
"e2e": "ng e2e",
"prettier-check": "npx prettier --check ."
},

🔥 Exception or Error

⠋ Generating browser application bundles (phase: sealing)...
<--- Last few GCs --->

[39208:0081C0A0]   200939 ms: Scavenge (reduce) 1004.7 (1021.9) -> 1003.9 (1022.9) MB, 2.9 / 0.0 ms  (average mu = 0.256, current mu = 0.179) allocation failure 
[39208:0081C0A0]   200979 ms: Scavenge (reduce) 1006.3 (1026.4) -> 1005.6 (1026.4) MB, 18.9 / 0.0 ms  (average mu = 0.256, current mu = 0.179) allocation failure 
[39208:0081C0A0]   201011 ms: Scavenge (reduce) 1008.1 (1025.1) -> 1007.5 (1026.1) MB, 9.5 / 0.0 ms  (average mu = 0.256, current mu = 0.179) allocation failure 


<--- JS stacktrace --->

FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory
 1: 01268689 v8::internal::Heap::PageFlagsAreConsistent+2169
 2: 0125E701 v8::internal::Heap::CollectGarbage+1985
 3: 0125CDB3 v8::internal::Heap::AllocateExternalBackingStore+1171

🌍 Your Environment

Angular - 12.0.0
Node -  v14.17.0
npm - 7.13.0

Anything else relevant?

[alan-agius4]

Duplicate of #20801

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