RFR: 8268165: AsyncLogging will crash if rotate() fails [v2]

[Xin Liu]

On Fri, 4 Jun 2021 21:08:23 GMT, Xin Liu <xliu at openjdk.org> wrote:

>> LogFileOutput::rotate() may leave _stream NULL because os::fopen() may return NULL due to space or inode limitations. AsyncLogWriter::write() calls LogFileOutput::write_blocking() without null check. Null check is added to prevent from crashing.
>
> Xin Liu has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:
> 
>  - Merge branch 'master' into JDK-8268165
>  - 8268165: AsyncLogging will crash if rotate() fails

hi, @YaSuenag, 
Could you take a look at this? It's an error-handling patch. 

thanks,
--lx

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PR: https://git.openjdk.java.net/jdk/pull/4332