webpack ... Killed error ... 137 (Out of memory)

[JasonKleban]

I have a new Ubuntu 20 on rpi 3b+ all the way updated. This might not be a moonfire-nvr related issue at all, but I'll log it anyway since I can't find any great matches elsewhere. Following guide/install-manual.md, looks like an out-of-memory issue in the webpack step? Possibly a bad loop? cargo stuff works fine and is probably more aggressive, if I had to guess.

yarn build
yarn run v1.22.4
webpack --mode production --config webpack/prod.config.js
Killed
error Command failed with exit code 137.

I didn't try the scripted install yet. I tried upgrading all dependencies to latest with yarn, no change.

[scottlamb]

I've never seen that before but I haven't tried running yarn build on a 1 GiB machine in a while. Two ideas:

• use zram
• just build it on another machine and copy it over. Unlike the moonfire-nvr binary, none of the JavaScript/HTML/etc. files in the ui-dist directory are architecture- or OS-specific. So "cross-compiling" is trivial; you just build it somewhere else and copy it over.

[scottlamb]

I'm pleasantly surprised the cargo command completed. I've definitely hit errors with it before on a 1 GiB machine.

[scottlamb]

I just tried it on my Raspberry Pi 2 (currently running Ubuntu 19.10) and hit the same problem. yarn build worked after I ran these commands:

sudo apt install zram-config
sudo systemctl start zram-config

YMMV.

I also noticed that (without zram-config) a build completed at revision 88fe6e5. I think the favicons-webpack-plugin thing in the next revision (45abeb2) is pretty intensive. I might get rid of it; it's not even producing the right output for me on my NUC setup for some reason. Some of the svg paths aren't scaled properly or something so I can't actually see the full camera shape in the circle.

[JasonKleban]

With those two commands I was unsuccessful with the same error. I will try to verify that zram is really enabled and/or try zswap ...

Update:

I think I was mistaken before too about cargo test - rerunning, or rerunning after cargo clean it is failing after sitting here for a long time:

Compiling moonfire-nvr v0.1.0 (/home/ubuntu/repos/moonfire-nvr)
Building [=====================================================> ] 349/350: moonfire-nvr(bin)

Ultimate printout:

...
   Compiling moonfire-nvr v0.1.0 (/home/ubuntu/repos/moonfire-nvr)
error: linking with `cc` failed: exit code: 1
  |
  = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-L" "/home/ubuntu/.rustup/toolchains/stable-aarch64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-gnu/lib" "/home/ubuntu/repos/moonfire-nvr/target/debug/deps/moonfire_nvr-d6b13864861fa9ed.11egqo4j2d0bob4p.rcgu.o
...
  = note: collect2: fatal error: ld terminated with signal 9 [Killed]
          compilation terminated.

[JasonKleban]

sudo apt install zram-config didn't have the same outcome as the instructions based here: https://github.com/StuartIanNaylor/zram-config (for example, there was no /etc/ztab file from apt, among other differences).

With the /etc/ztab updated away from the defaults as shown in the zram-config readme, yarn build finally worked on-board (284 seconds). And cargo test (261 seconds - but this speed is probably from resuming partially successful runs previously) with all tests passing. cargo build --release (72 minutes)