# Heap out of memory **URL:** \ **Category:** Serverless Framework\ **Tags:** aws\ **Created:** [July 31, 2017, 11:46am UTC](https://forum.serverless.com/t/heap-out-of-memory/2395 "2017-07-31T11:46:13Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![ChristopheBougere](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.serverless.com/christophebougere/32/989_2.png) [@ChristopheBougere](https://forum.serverless.com/u/ChristopheBougere)\ **Post date:** [July 31, 2017, 11:46am UTC](https://forum.serverless.com/t/heap-out-of-memory/2395/1 "2017-07-31T11:46:13Z")
Hi there, I am using xlsx ([https://www.npmjs.com/package/xlsx](https://www.npmjs.com/package/xlsx)) in order to parse a large .xls file (about 1Mb). I was able to do that previously in a lambda, and I’m trying to migrate everything to serverless. I am using serverless-offline with serverless-webpack to transpile from ES6 with async await to node 6. However, it seems that I have a “Javascript heap out of memory”… I also tried to increase the memory by running like this: `node --max-old-space-size=12000 ./node_modules/serverless/bin/serverless webpack invoke -f import -p src/functions/import/event.json` It does not change anything. Did anyone already encountered the same issue? What can I do? Thanks Here is the stacktrace: ``` <--- Last few GCs ---> 34509 ms: Mark-sweep 1341.7 (1395.0) -> 986.9 (1040.1) MB, 319.9 / 0 ms [allocation failure] [GC in old space requested]. 35147 ms: Mark-sweep 986.9 (1040.1) -> 986.9 (1040.1) MB, 638.4 / 0 ms [allocation failure] [GC in old space requested]. 35638 ms: Mark-sweep 986.9 (1040.1) -> 986.5 (1034.1) MB, 491.2 / 0 ms [last resort gc]. 35934 ms: Mark-sweep 986.5 (1034.1) -> 986.5 (1033.1) MB, 295.2 / 0 ms [last resort gc]. <--- JS stacktrace ---> ==== JS stack trace ========================================= Security context: 0x1a600d2c9e31 2: make_sector_list [/Users/myuser/path/to/my/pkg/node_modules/xlsx/xlsx.js:~1259] [pc=0x32a8c9e4023c] (this=0x1a600d2e15d9 ,sectors=0x330c67670d29 ,dir_start=414,fat_addrs=0x330c67670d09 ,ssz=512) 3: parse [/Users/myuser/path/to/my/pkg/node_modules/xlsx/xlsx.js:1090] [pc=0x32... FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of memory 1: node::Abort() [/Users/myuser/.nvm/versions/node/v6.3.1/bin/node] 2: node::FatalException(v8::Isolate*, v8::Local, v8::Local) [/Users/myuser/.nvm/versions/node/v6.3.1/bin/node] 3: v8::internal::V8::FatalProcessOutOfMemory(char const*, bool) [/Users/myuser/.nvm/versions/node/v6.3.1/bin/node] 4: v8::internal::Factory::NewUninitializedFixedArray(int) [/Users/myuser/.nvm/versions/node/v6.3.1/bin/node] 5: v8::internal::(anonymous namespace)::ElementsAccessorBase >::ConvertElementsWithCapacity(v8::internal::Handle, v8::internal::Handle, v8::internal::ElementsKind, unsigned int, unsigned int, unsigned int, int) [/Usmyuseruser/.nvm/versions/node/v6.3.1/bin/node] 6: v8::internal::(anonymous namespace)::ElementsAccessorBase >::GrowCapacityAndConvertImpl(v8::internal::Handle, unsigned int) myusers/myuser/.nvm/versions/node/v6.3.1/bin/node] 7: v8::internal::Runtime_GrowArrayElements(int, v8::internal::Object**, v8::internal::Isolate*) [/Users/myuser/.nvm/versions/node/v6.3.1/bin/node] 8: 0x32a8c8806338 [1] 9066 abort serverless webpack invoke -f import -p src/functions/import/event.json ``` ---
**Author:** ![ChristopheBougere](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.serverless.com/christophebougere/32/989_2.png) [@ChristopheBougere](https://forum.serverless.com/u/ChristopheBougere)\ **Post date:** [July 31, 2017, 11:56am UTC](https://forum.serverless.com/t/heap-out-of-memory/2395/2 "2017-07-31T11:56:48Z")
Note that sometimes the error is totally different (looks like a xlsx error, but I’m almost sure it’s still a memory issue, never had before). And also, sometimes, execution goes fine, and I have the expected result. Here is the second error I can have ``` Error in handler: TypeError: Cannot set property 'name' of undefined at parse (/Users/path/to/my/pkg/node_modules/xlsx/xlsx.js:1092:29) at Object.readSync [as read] (/Users/path/to/my/pkg/node_modules/xlsx/xlsx.js:1354:9) at readSync (/Users/path/to/my/pkg/node_modules/xlsx/xlsx.js:17412:34) at Object.readFileSync (/Users/path/to/my/pkg/node_modules/xlsx/xlsx.js:17430:9) at parseReport (/Users/path/to/my/pkg/.webpack/src/functions/import/index.js:816:23) at _callee$ (/Users/path/to/my/pkg/.webpack/src/functions/import/index.js:177:28) at tryCatch (/Users/path/to/my/pkg/node_modules/regenerator-runtime/runtime.js:65:40) at GeneratorFunctionPrototype.invoke [as _invoke] (/Users/path/to/my/pkg/node_modules/regenerator-runtime/runtime.js:303:22) at GeneratorFunctionPrototype.prototype.(anonymous function) [as next] (/Users/path/to/my/pkg/node_modules/regenerator-runtime/runtime.js:117:21) at step (/Users/path/to/my/pkg/node_modules/babel-runtime/helpers/asyncToGenerator.js:17:30) at /Users/path/to/my/pkg/node_modules/babel-runtime/helpers/asyncToGenerator.js:28:13 at run (/Users/path/to/my/pkg/node_modules/core-js/library/modules/es6.promise.js:87:22) at /Users/path/to/my/pkg/node_modules/core-js/library/modules/es6.promise.js:100:28 at flush (/Users/path/to/my/pkg/node_modules/core-js/library/modules/_microtask.js:18:9) at _combinedTickCallback (internal/process/next_tick.js:67:7) at process._tickDomainCallback (internal/process/next_tick.js:122:9) Type Error --------------------------------------------- Cannot set property 'name' of undefined For debugging logs, run again after setting the "SLS_DEBUG=*" environment variable. Get Support -------------------------------------------- Docs: docs.serverless.com Bugs: github.com/serverless/serverless/issues Forums: forum.serverless.com Chat: gitter.im/serverless/serverless Your Environment Information ----------------------------- OS: darwin Node Version: 6.3.1 Serverless Version: 1.18.0 ``` ---
**Author:** ![ChristopheBougere](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.serverless.com/christophebougere/32/989_2.png) [@ChristopheBougere](https://forum.serverless.com/u/ChristopheBougere)\ **Post date:** [August 1, 2017, 9:57am UTC](https://forum.serverless.com/t/heap-out-of-memory/2395/3 "2017-08-01T09:57:49Z")
Never mind, I thought it was linked to serverless because it didn’t happen before, but I also upgraded my node version. I found the issue (was retrieving a xlsx file with `http.get` via a `pipe`, and was trying to parse it on `request.on('end')` event instead of `pipe.on('finished')` so sometimes the file was not totally closed when I opened it…)