RFR 8244105: JDK 11.0.7 -Xlog gc issue with file path if not exist

[dmytro sheyko]

Hi,

I think it would be very convenient for app developers if JVM were able to
create intermediate directories to gc.log file if they do not exist.

I.e.
  $ if [ -f logs/gc.log ]; then echo "log file exists"; else echo "log file
does not exist"; fi
  log file does not exist

  $ if [ -d logs ]; then echo "log directory exists"; else echo "log
directory does not exist"; fi
  log directory does not exist

  $ java -Xlog:"gc*:file=logs/gc.log" -version
  ...

  $ if [ -d logs ]; then echo "log directory exists"; else echo "log
directory does not exist"; fi
  log directory exists

  $ if [ -f logs/gc.log ]; then echo "log file exists"; else echo "log file
does not exist"; fi
  log file exists

Thanks,
Dmytro

On Fri, May 8, 2020 at 8:31 PM Harold Seigel <harold.seigel at oracle.com>
wrote:

> Hi,
>
> Please review this fix for JDK-8244105.  The fix continues program
> execution even when specified logging options are invalid.  Previously,
> invalid logging options terminated the program.  Now, a warning is issued.
> For example:
>
> > java -Xlog:"gc*:file=/dont/exist" -version
> [0.001s][error][logging] Error opening log file '/dont/exist': No such
> file or directory
> [0.001s][error][logging] Initialization of output 'file=/dont/exist' using
> options '(null)' failed.
> Java HotSpot(TM) 64-Bit Server VM warning: Invalid -Xlog option
> '-Xlog:gc*:file=/dont/exist', see error log for details.
>
> java version "15-internal" 2020-09-15
> Java(TM) SE Runtime Environment (fastdebug build
> 15-internal+0-2020-05-08-1313404.hseigel.bug8244105)
> Java HotSpot(TM) 64-Bit Server VM (fastdebug build
> 15-internal+0-2020-05-08-1313404.hseigel.bug8244105, mixed mode, sharing)
>
> Open Webrev:
> http://cr.openjdk.java.net/~hseigel/bug_8244105/webrev/index.html
>
> JBS Bug:  https://bugs.openjdk.java.net/browse/JDK-8244105
>
> The fix was regression tested by running Mach5 tiers 1 and 2 tests and
> builds on Linux-x64, Solaris, Windows, and Mac OS X and by running Mach5
> tiers 3-5 tests on Linux-x64.
>
> Thanks, Harold
>
>
>
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