internal error occurred while trying to spawn the application

[Valen Onish]

Regularly (once in 3 days) I get this:

 An internal error occurred while trying to spawn the application. Exception type: Passenger::SystemException Error message: Cannot create a Unix socket pair: Cannot allocate memory (errno=12) Backtrace: in 'void Passenger::ApplicationPool2::SmartSpawner::startPreloader()' (SmartSpawner.h:205) in 'virtual Passenger::ApplicationPool2::SpawnObject Passenger::ApplicationPool2::SmartSpawner::spawn(const Passenger::ApplicationPool2::Options&)' (SmartSpawner.h:750) in 'void Passenger::ApplicationPool2::Group::spawnThreadRealMain(const SpawnerPtr&, const Passenger::ApplicationPool2::Options&, unsigned int)' (Implementation.cpp:1038)


I use ruby 2.1.5 and rails 4.2.0

Any ideas?

[Hongli Lai]

On Fri, May 15, 2015 at 5:16 PM, Valen Onish <valen...@gmail.com> wrote:
> Regularly (once in 3 days) I get this:
>
> An internal error occurred while trying to spawn the application. Exception
> type: Passenger::SystemException Error message: Cannot create a Unix socket
> pair: Cannot allocate memory (errno=12)

I'm guessing that at that point, your system is out of memory. Try
increasing your memory or swap space.

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[Valen Onish]

My ubuntu vps had 2Gb Ram and I’ve never seen 800mb exceeding usage.

Now I upgraded my vps to 4Gb, but after a couple days I’ve got the same error.

I’ve never got this error on passenger 4

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Thanks,                

[Daniel Knoppel]

Hi Valen,

You can run passenger-memory-stats, passenger-status to get more info on the memory behavior of passenger. It's important to know whether passenger is using the memory, your app, or something else on your vps.

If it happens every couple of days you should look e.g. at day 1 and then day 2 again to see if something is changing.

- Daniel