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I'm on spacemacs develop, emacs version 27, OSX Mojave 10.14.

After adding the lsp layer and the snippet from the metals documentation here: to my .spacemacs file, treemacs will refuse to expand a directory and display its contents, giving the error "Creating pipe: too many open files"

My ulimit setting are:

$ ulimit -a
-t: cpu time (seconds)              unlimited
-f: file size (blocks)              unlimited
-d: data seg size (kbytes)          unlimited
-s: stack size (kbytes)             8192
-c: core file size (blocks)         0
-v: address space (kbytes)          unlimited
-l: locked-in-memory size (kbytes)  unlimited
-u: processes                       1418
-n: file descriptors                256

I suspect this is related to either metals or lsp-mode creating some large number of files in the compilation process. Though checking lsof:

$ lsof | grep -iE "sbt|ivy2" | wc -l   
    1585

doesn't show too many open files related to sbt or ivy.

Running list-buffers I show only 10-20 buffers; nothing unusual.

When this happens, I cannot even exit Emacs and have to kill -9 the process.

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