Ts-node: JS Heap out of memory

[jameshmread]

When i'm using ts-node on a node project. When a child process reaches 1.5Gb in memory usage, the program begins to crawl and then crashes due to being out of memory.

I am passing the flag "start": "ts-node --max_old_space_size=8192 ./src/index.ts",
However the limit still applies.
Error Here:

<--- Last few GCs --->

[10280:000002B2CAF2C420] 279290 ms: Mark-sweep 1005.6 (1554.0) -> 1005.4 (1554.5) MB, 181.8 / 0.0 ms allocation failure GC in old space requested
[10280:000002B2CAF2C420] 279464 ms: Mark-sweep 1005.4 (1554.5) -> 1005.3 (1512.5) MB, 173.2 / 0.0 ms last resort GC in old space requested
[10280:000002B2CAF2C420] 279646 ms: Mark-sweep 1005.3 (1512.5) -> 1005.3 (1501.5) MB, 182.4 / 0.0 ms last resort GC in old space requested

<--- JS stacktrace --->

==== JS stack trace =========================================

Security context: 00000147144254D9
1: _parseMappings(aka SourceMapConsumer_parseMappings) [C:\git\ProfessorX\node_modules\ts-node\node_modulessource-map\libsource-map-consumer.js:~468] [pc=000000F626AF5288](this=0000033C3DBB7739 ,aStr=0000033C3DBB6AB1 )
2: get [C:\git\ProfessorX\node...

FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of memory
1: node::DecodeWrite
2: node_module_register
3: v8::internal::FatalProcessOutOfMemory
4: v8::internal::FatalProcessOutOfMemory
5: v8::internal::Factory::NewFixedArray
6: v8::internal::HashTable::IsKey
7: v8::internal::HashTable::IsKey
8: v8::internal::StringTable::LookupString
9: v8::internal::StringTable::LookupString
10: v8::internal::SourcePositionTableIterator::Advance
11: v8::internal::SourcePositionTableIterator::Advance
12: 000000F6269843C1

Dependencies

"dependencies": { "JSONStream": "^1.3.2", "node-progress-3": "^0.4.3", "typescript": "^2.7.2" }, "devDependencies": { "@types/chai": "^4.1.2", "@types/mocha": "^2.2.48", "@types/node": "^6.0.103", "chai": "^4.1.2", "codelyzer": "^4.2.1", "mocha": "^4.1.0", "ts-mockito": "^2.3.0", "ts-node": "4.1.0", "tslint": "^5.9.1", "typings": "^2.1.1" },
Thanks

[blakeembrey]

Unfortunately I'm going to close this as won't fix since passing node.js flags are no longer supported on master (see https://github.com/TypeStrong/ts-node/releases/tag/v5.0.0). You can use node --max_old_space_size=8192 -r ts-node/register ./src/index.ts on both versions though.

[jameshmread]

Fantastic, fixes my issue!! Thanks!

Although. When I have child processes using the silent flag. They crash when they reach 250mb with no errors?

[blakeembrey]

You could check the node.js issue tracker, crashes in this process are probably out of scope for me in ts-node and I wouldn't be sure where to start to help you, sorry.

[bjg2]

How do I specify ts-node args with node --max_old_space_size=8192 -r ts-node/register ./src/index.ts? I need to provide it with --project...

And even without that I get Error: Cannot find module 'ts-node/register'? Whats the correct way to start ts-node with not-default --max_old_space_size?

[krzysztof-raciniewski]

How do I specify ts-node args with node --max_old_space_size=8192 -r ts-node/register ./src/index.ts? I need to provide it with --project...

And even without that I get Error: Cannot find module 'ts-node/register'? Whats the correct way to start ts-node with not-default --max_old_space_size?

I have the sam problem. I don't know how to pass --project parameter with node --max_old_space_size=8192 -r ts-node/register ./src/index.ts. Can anyone help?

[matomesc]

@krzysztof-raciniewski use environment variables to configure ts-node - you want to set a value for TS_NODE_PROJECT (https://github.com/TypeStrong/ts-node#cli-and-programmatic-options)

[sgentile]

@krzysztof-raciniewski use environment variables to configure ts-node - you want to set a value for TS_NODE_PROJECT (https://github.com/TypeStrong/ts-node#cli-and-programmatic-options)

I'm not sure I follow - ie. I'm using this

"ts-server": "NODE_PATH=/.src ts-node --max_old_space_size=8192 -r tsconfig-paths/register src/index.ts",

getting an ARG_UNKNOWN_OPTION error

[sgentile]

@krzysztof-raciniewski use environment variables to configure ts-node - you want to set a value for TS_NODE_PROJECT (https://github.com/TypeStrong/ts-node#cli-and-programmatic-options)

like this?

"ts-node": {
        "maxOldSpaceSize": 8196
    },

it's not clear how to pass a value and the cli doesn't confirm it's applied

[jameshmread]

@krzysztof-raciniewski use environment variables to configure ts-node - you want to set a value for TS_NODE_PROJECT (https://github.com/TypeStrong/ts-node#cli-and-programmatic-options)

like this?

"ts-node": {
        "maxOldSpaceSize": 8196
    },

it's not clear how to pass a value and the cli doesn't confirm it's applied

No. It's done like the above in your first comment. Which option is giving you the error? Could you include the trace?

[sgentile]

I need to set maxOldSpaceSize (topic of thread)

What is environmental variable for that - this is very unclear.

On Fri, Jan 29, 2021 at 9:27 AM James Read [e-mail] wrote:

@krzysztof-raciniewski https://github.com/krzysztof-raciniewski use
environment variables to configure ts-node - you want to set a value for
TS_NODE_PROJECT (
https://github.com/TypeStrong/ts-node#cli-and-programmatic-options)

like this?

"ts-node": {
"maxOldSpaceSize": 8196
},

it's not clear how to pass a value and the cli doesn't confirm it's applied

No. It's done like the above in your first comment. Which option is giving
you the error? Could you include the trace?

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[blakeembrey]

TS node does not support these as CLI arguments because it was difficult to maintain as a wrapper to node.js. The preferred way is using node.js directly (e.g. node --max_old_space_size=8192 --require ts-node/register) or via node.js provided CLI flags (e.g. NODE_OPTIONS='--max_old_space_size=8192'), both are documented in https://nodejs.org/api/cli.html#cli_command_line_options.

What @jameshmread is saying should work for you, you can use the node --max_old_space_size=8192 --require ts-node/register approach and set options for TS Node using environment variables (defined in https://github.com/TypeStrong/ts-node#cli-and-programmatic-options). For example, TS_NODE_PROJECT=... node -r ts-node/register. You can also set ts-node options in your tsconfig.json like above, but you can't use it to set node.js options.