Rtags does not automatically reindex files

[cheshire]

Please mark appropriate

• [*] rtags (rdm/rc/rp)
• Emacs Lisp
  • ac-rtags.el
  • company-rtags.el
  • helm-rtags.el
  • flycheck-rtags.el
  • ivy-rtags.el
  • rtags.el

Problem description

When I change the file (either using VIM or just touch) it does not get reindex:
no corresponding lines appear in rtags.log.
If I run rc --check-reindex MyFile.cpp, then it says "Dirtied one file" and actually does reindex it.
If I run rc -s watchedpaths I do see the folder my file is in under filemanager|source|dependency.

Expected behavior

Automatic reindexing upon filesystem changes.

Actual behavior

No reindexing

Environment

• Your operating system:
  OS X

• LLVM/Clang version:
  4.0.1

[cheshire]

Or am I supposed to start rdm with --watch-system-paths?

[cheshire]

Reindexing does properly trigger when I type rc -x

[Andersbakken]

How are you starting rdm? The check-reindex stuff should only be necessary when you run rdm with --no-filesystem-watcher Can you run rdm -v -v (This will produce a lot of output) if you're indexing large files and see what happens when you touch a file. Anders

…

On Thu, Sep 7, 2017 at 1:31 PM, George Karpenkov ***@***.***> wrote: Reindexing does properly trigger when I type rc -x — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#1052 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAEdSpn0MOxf0A-vQ7hPE9V7bd9bMtP_ks5sgFKfgaJpZM4PQVVa> .

[cheshire]

@Andersbakken tracked it down to be an error with a limit to the number of opened file descriptors on mac.
RDM prints:

2017-09-11 14:36 rdm[36406] (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-22)

Apparently, it's a common issue, e.g. cf. nodejs/node-v0.x-archive#5463

Raising my ulimit did not help.

[cheshire]

I have about 7000 files in my project, but running ulimit -n 10000 did not seem to stop the crash from happening.

[cheshire]

@Andersbakken would be great if rtags could figure out / could be configured to use fswatch with a directory, and not with individual filename.
Using individual filenames seems to bound to have problems with projects with 10k+ files.

[casch-at]

Closing as the initial problem was due to the file system watcher limit. Please open a new issue for any feature requests or/and issues left. Thanks!