Azure Functions
An Azure service that provides an event-driven serverless compute platform.
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Worker was unable to load function HttpTrigger: 'UNKNOWN: unknown error, lstat 'C:\home''
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(278.4, 28.000000000000004%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ECC%3C/text%3E%3C/svg%3E)
Chehui Chou
15
Reputation points
My Function App had been working nicely for day, but this morning it suddenly stopped working. I checked Application Insights, but all I got was a whole bunch of HTTP 500 errors and exceptions that showed the following messages:
Exception while executing function: Functions.HttpTrigger Result: Failure
Exception: Worker was unable to load function HttpTrigger: 'UNKNOWN: unknown error, lstat 'C:\home''
Stack: Error: Worker was unable to load function HttpTrigger: 'UNKNOWN: unknown error, lstat 'C:\home''
at Object.realpathSync (node:fs:2552:7)
at toRealPath (node:internal/modules/cjs/loader:441:13)
at Module._findPath (node:internal/modules/cjs/loader:584:24)
at Module._resolveFilename (node:internal/modules/cjs/loader:981:27)
at Module._load (node:internal/modules/cjs/loader:841:27)
at Module.require (node:internal/modules/cjs/loader:1061:19)
at Object.apply (C:\Program Files (x86)\SiteExtensions\Functions\4.17.3\workers\node\dist\src\worker-bundle.js:2:42034)
at require (node:internal/modules/cjs/helpers:103:18)
at C:\Program Files (x86)\SiteExtensions\Functions\4.17.3\workers\node\dist\src\worker-bundle.js:2:39984
at Generator.next (
{count} votes
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(275.2, 33%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMM%3C/text%3E%3C/svg%3E)
MughundhanRaveendran-MSFT 12,486 Reputation points2023-04-17T12:56:11.6833333+00:00 @Chehui Chou Are you still facing this issue?how frequently are you seeing this issue?
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Chehui Chou 15 Reputation points
2023-04-22T20:38:57.9233333+00:00 @MughundhanRaveendran-MSFT Not anymore. After a while after I posted this question, the problem disappeared even though I had done nothing in particular.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(230.39999999999998, 10%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ET%3C/text%3E%3C/svg%3E)
Teodor 0 Reputation points2023-07-31T15:07:55.6533333+00:00 Hi All,
One of our apps experienced a similar issue one week ago. We attempted to start the execution of an Azure Orchestartor Function via HTTP, and request failed (500 HTTP code) with the following exception being logged:
Exception: Worker was unable to load function HTTPStarter: 'UNKNOWN: unknown error, lstat 'C:\home'' Stack: Error: Worker was unable to load function HTTPStarter: 'UNKNOWN: unknown error, lstat 'C:\home'' at Object.realpathSync (node:fs:2503:7) at toRealPath (node:internal/modules/cjs/loader:394:13) at Function.Module._findPath (node:internal/modules/cjs/loader:537:24) at Function.Module._resolveFilename (node:internal/modules/cjs/loader:919:27) at Function.Module._load (node:internal/modules/cjs/loader:778:27) at Module.require (node:internal/modules/cjs/loader:1005:19) at Object.apply (C:\Program Files (x86)\SiteExtensions\Functions\4.23.0\workers\node\dist\src\worker-bundle.js:2:44135) at require (node:internal/modules/cjs/helpers:102:18) at C:\Program Files (x86)\SiteExtensions\Functions\4.23.0\workers\node\dist\src\worker-bundle.js:2:41616 at Generator.next (<anonymous>)Function had worked like a charm for >12 months and issue did not replicate afterwards. A cause/fix would be highly appreciated.
Kind Regards,
Teodor
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