Question about OpenJDK package for Fedora

[Jiri Vanek]

On 04/07/2017 06:18 PM, Nikolas Everett wrote:
> I'm sorry to contact you directly. I know that can be a pain but I'm not sure what to do. About a

Thats perfectly ok.

> month ago we started having trouble with the OpenJDK package on Fedora and it looks like
> <https://rpmfind.net/linux/RPM/fedora/updates/25/x86_64/j/java-1.8.0-openjdk-1.8.0.121-8.b14.fc25.x86_64.html>
> it is your baby. We're periodically seeing NullPointerExceptions in very strange places. Here
> <https://gist.github.com/nik9000/eb5598f988e4473e382dc6987f14fbd6> is an example of one of the
> exceptions and here
> <https://github.com/apache/lucene-solr/blob/releases/lucene-solr/6.4.2/lucene/memory/src/java/org/apache/lucene/index/memory/MemoryIndex.java#L528> is
> the line that through the exception. These happen all over the place, in Lucene, in Joda Time
> <https://stackoverflow.com/questions/43260652/why-would-a-stacktrace-point-to-a-closing-brace-in-java>,
> and other spots, all of which don't make a whole lot of sense.

Hm, I'm not much clever from that anyway.
>
> Do you have any hints on how to make a minimal reproduction for this? It only happens in Fedora and
> we think it started with the latest version of the package. The failures come about once a day on
> average but there is a lot of deviation.
>
> I've seen similar issues, but only on machines with broken hardware. We've replaced the hardware and
> still see the issue. And, again, it only happens on fedora and didn't show up until about a month ago.
>
> We don't see similar exceptions on the other distributions but with different line numbers. So it
> feels like something internal but we have no idea what and don't have the knowledge to figure it out.
>


Well, you wrote "month ago" and "latest packages" - that do not left much clue.  So first steps on 
your side will be:
  - pinpoint the exact version wehre it started to fail
    -  then we will move to search for exact patch which caused it
  - move this discussion to more public list. Lucene is one of the best OpenJDK consummers
    - As it looks like distribution specific, mor then upstream-sepcific, I would recommend IcedTea 
Distro List <distro-pkg-dev at openjdk.java.net> (cced)
    - But you, or any other Lucene representative must sign in.

Thanx!
   J.