too many clang/gcc processes, system limit reached

[simonmichael]

Using Haskell extension 1.2.0 in VS Code 1.51.0 on mac catalina, I started getting fork: resource exhausted (Resource temporarily unavailable) in all terminals. ps showed that it had opened many clang (and some gcc) processes, eventually reaching the process limit. Restarting the Haskell LSP process fixed it.

pstree output: https://termbin.com/c9e4y

[jneira]

Hi, thanks for the bug report. Maybe restricting the number of jobs used by the chosen build tool (cabal or stack) could alliviate the situation, but not sure.
Could you share the project you are loading using vscode? And the output of executing haskell-language-server --debug in the project root directory?

[simonmichael]

@jneira, the project was https://github.com/simonmichael/hledger . Here's the start and end of the rather extensive debug output:

~/src/hledger$ '/Users/simon/Library/Application Support/Code/User/globalStorage/haskell.haskell/haskell-language-server-0.5.1-darwin-8.8.4' --debug
haskell-language-server version: 0.5.1.0 (GHC: 8.8.4) (PATH: /Users/simon/Library/Application Support/Code/User/globalStorage/haskell.haskell/haskell-language-server-0.5.1-darwin-8.8.4) (GIT hash: e3fe0e7546aa91e44cc56cfe8ec078a026cf533a)
(haskell-language-server)Ghcide setup tester in /Users/simon/src/hledger.
Report bugs at https://github.com/haskell/haskell-language-server/issues

Tool versions found on the $PATH
cabal:		3.2.0.0
stack:		2.5.1
ghc:		Not found


Step 1/4: Finding files to test in /Users/simon/src/hledger
Found 185 files

Step 2/4: Looking for hie.yaml files that control setup
Found 1 cradle

Step 3/4: Initializing the IDE

Step 4/4: Type checking the files
[INFO] Consulting the cradle for "hledger/Hledger/Cli/Commands/Prices.hs"
Output from setting up the cradle Cradle {cradleRootDir = "/Users/simon/src/hledger", cradleOptsProg = CradleAction: Stack}
> Configuring GHCi with the following packages: hledger
> /Users/simon/src/hledger/.stack-work/install/x86_64-osx/8f62da7b7cad69e634c0a25a3b801a1f8c286b667141babffa3e57e9e13dbc6e/8.8.4/pkgdb:/Users/simon/.stack/snapshots/x86_64-osx/8f62da7b7cad69e634c0a25a3b801a1f8c286b667141babffa3e57e9e13dbc6e/8.8.4/pkgdb:/Users/simon/.stack/programs/x86_64-osx/ghc-8.8.4/lib/ghc-8.8.4/package.conf.d
[INFO] Using interface files cache dir: /Users/simon/.cache/ghcide/main-95fde53906fdf23a574ca05087ba6737f0733453
[INFO] Making new HscEnv[main]
[INFO] Consulting the cradle for "hledger-ui/Hledger/UI/ErrorScreen.hs"
Output from setting up the cradle Cradle {cradleRootDir = "/Users/simon/src/hledger", cradleOptsProg = CradleAction: Stack}
> Using main module: 1. Package `hledger-ui' component hledger-ui:exe:hledger-ui with main-is file: /Users/simon/src/hledger/hledger-ui/hledger-ui.hs
> Building all executables for `hledger-ui' once. After a successful build of all of them, only specified executables will be rebuilt.
> hledger-ui> configure (exe)
> Configuring hledger-ui-1.19.99...
> hledger-ui> initial-build-steps (exe)
> The following GHC options are incompatible with GHCi and have not been passed to it: -threaded
> Configuring GHCi with the following packages: hledger-ui
> /Users/simon/src/hledger/.stack-work/install/x86_64-osx/8f62da7b7cad69e634c0a25a3b801a1f8c286b667141babffa3e57e9e13dbc6e/8.8.4/pkgdb:/Users/simon/.stack/snapshots/x86_64-osx/8f62da7b7cad69e634c0a25a3b801a1f8c286b667141babffa3e57e9e13dbc6e/8.8.4/pkgdb:/Users/simon/.stack/programs/x86_64-osx/ghc-8.8.4/lib/ghc-8.8.4/package.conf.d
[INFO] Using interface files cache dir: /Users/simon/.cache/ghcide/main-cfc3abf79be44c0a0f343001c97103fc6b53f447
[INFO] Using interface files cache dir: /Users/simon/.cache/ghcide/main-cfc3abf79be44c0a0f343001c97103fc6b53f447
[INFO] Making new HscEnv[main,main]
[INFO] Consulting the cradle for "hledger/test/unittest.hs"
Output from setting up the cradle Cradle {cradleRootDir = "/Users/simon/src/hledger", cradleOptsProg = CradleAction: Stack}
> Using main module: 1. Package `hledger' component hledger:test:unittest with main-is file: /Users/simon/src/hledger/hledger/test/unittest.hs
> hledger> configure (lib + test)
> Configuring hledger-1.19.99...
> hledger> initial-build-steps (lib + test)
> hledger> Test running disabled by --no-run-tests flag.
> Completed 2 action(s).
> Configuring GHCi with the following packages: hledger
> /Users/simon/src/hledger/.stack-work/install/x86_64-osx/8f62da7b7cad69e634c0a25a3b801a1f8c286b667141babffa3e57e9e13dbc6e/8.8.4/pkgdb:/Users/simon/.stack/snapshots/x86_64-osx/8f62da7b7cad69e634c0a25a3b801a1f8c286b667141babffa3e57e9e13dbc6e/8.8.4/pkgdb:/Users/simon/.stack/programs/x86_64-osx/ghc-8.8.4/lib/ghc-8.8.4/package.conf.d
[INFO] Using interface files cache dir: /Users/simon/.cache/ghcide/main-1acedf47c7f9803cd16f51684ef1ef20fb2a295f
[INFO] Using interface files cache dir: /Users/simon/.cache/ghcide/main-1acedf47c7f9803cd16f51684ef1ef20fb2a295f
[INFO] Using interface files cache dir: /Users/simon/.cache/ghcide/main-1acedf47c7f9803cd16f51684ef1ef20fb2a295f
[INFO] Making new HscEnv[main,main,main]
[INFO] Consulting the cradle for "hledger/Setup.hs"
...
Completed (123 files worked, 62 files failed)

[jneira]

I think this one has the same root cause as #500
There are more useful info (logs, etc) from @fosskers

[michaelpj]

Closing as old and no reports