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Re: excessive java precommit logging

Thanks Udi for bringing this up. I'm also for dropping INFO. It's just incredible verbose. More importantly, from my experience the INFO level doesn't help debugging problems, but it makes finding errors messages or warnings harder.

That said, here's what I do to search through the log:

1) curl <build_url>/consoleText | less

This is when I just want to quickly look for something.

2) curl <build_url>/consoleText > log.txt
   less log.txt

Here we store the log to a file first, then use 'less' or 'grep' to search it.

When in 'less', I use '/' to grep through the lines. Pressing 'n' or 'N' gets you forward and back in the search results.

That works pretty well, but I think we would do us a favor by dropping the log level. Shall we try it out?


On 19.12.18 23:27, Udi Meiri wrote:
The gradle scan doesn't pinpoint the error message, and it doesn't contain all the lines:

The logs might be useful, but usually not from passing tests. Doesn't gradle log output from failed tests by default?

On Wed, Dec 19, 2018 at 1:22 PM Thomas Weise <thw@xxxxxxxxxx <mailto:thw@xxxxxxxxxx>> wrote:

    I usually follow the download procedure outlined by Scott to look at the logs.

    These logs are big, but when there is a problem it is sometimes essential to
    have the extra output, especially for less frequent flakes.

    Reducing logs would then require the author to add extra logging to the PR
    (and attempt to reproduce), which is also not nice.


    On Wed, Dec 19, 2018 at 11:47 AM Scott Wegner <scott@xxxxxxxxxx
    <mailto:scott@xxxxxxxxxx>> wrote:

        I'm not sure what we lose by dropping the --info flag, but I generally
        worry about reducing log output since logs are the main resource for
        diagnosing Jenkins build errors.

        It seems the issue is that Chrome doesn't scale well to large log files.
        A few alternative solutions:

        1. Use the produced Build Scan (example: [1]) instead of the raw console
        log. The build scan is quite useful at pointing to what actually failed,
        and filtering log output for only that task.
        2. Instead of consoleFull, use consoleText ("View as plain text" link in
        Jenkins), which seems to be much easier on Chrome
        3. Download the consoleText output locally and use your favorite log
        viewer that can scale to large files.


        On Wed, Dec 19, 2018 at 10:42 AM Udi Meiri <ehudm@xxxxxxxxxx
        <mailto:ehudm@xxxxxxxxxx>> wrote:

            Hi all,
            I'd like to reduce precommit log sizes on Jenkins. For example:
            is 79M, which makes Chrome sluggish to use on it (tab is constantly
            using a whole cpu core).

            I know this might be controversial, but I'd like to propose to
            remove the --info flag from the gradlew command line.


        Got feedback?