bugGNU Parallel - Bugs: bug #63486, parallel: Error: Argument list too...


bug #63486: parallel: Error: Argument list too long error

Submitter:  None
Submitted:  Thu 08 Dec 2022 09:05:03 AM UTC
Category:  None Severity:  3 - Normal
Item Group:  None Status:  Postponed
Privacy:  Public Assigned to:  tange
Open/Closed:  Open
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Tue 07 Mar 2023 05:01:44 PM UTC, comment #3: 

It is really this bug that blocks it:


Ole Tange <tange>
Group administrator
Fri 09 Dec 2022 03:12:43 PM UTC, comment #2: 

Thanks for your reply.

I do use --env/--session when possible but still it becomes too much of a burden when there are many environment items. env_parallel usually "just works" but this too long error is the one thing I have pain dealing with. I'm very glad to hear there is possibility of fixing this limitation. I hope that it gets implemented!

Fri 09 Dec 2022 11:57:35 AM UTC, comment #1: 

The problem is covered in:

The workaround is to use --env or --session.

When you get it working, please file a report on how 'man env_parallel' could be updated so it would cover your solution.

The long term solution would be to make the receiving process a perl process that reads from STDIN. This means the environment is not limited by execve. It makes it harder to implement --pipe, but not impossible. So while I have a working design in my head, getting it actually implemented is harder.

But it is good to know that there are people who are hit by the limit and who would benefit from this.

Thu 08 Dec 2022 09:05:03 AM UTC, original submission:  

I've been using env_parallel for a while now and it is great piece of software but the biggest issue with it is the Command line too long/Argument list too long error. I've read everything online and the only way I saw that could maybe fix it requires some hacky modification of the Linux kernel.

Is there really nothing else that can be done about it? Is there a way you can use some other internal function instead of IPC::open3 and prevent invoking execve which seems to be the issue? I've tried some workarounds in terms of feeding input or using --env to get around this but it isn't always possible to work around.

Thanks for all your great work.



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    Date Changed by Updated Field Previous Value => Replaced by
    2023-03-07 tange StatusNone Postponed
        Assigned toNone tange

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