8044406: crash in G1BlockOffsetArray::forward_to_block_containing_addr_slow

[Mikael Gerdin]

Hi Phil,

On 2014-12-09 15:33, Phil Schwan wrote:
> G'day--
>
> We've been struggling with this crash for months, so it was with great
> excitement that I saw Poonam's patch in
> https://bugs.openjdk.java.net/browse/JDK-8044406

You might want to check out
http://hg.openjdk.java.net/jdk9/hs-gc/hotspot/rev/3d192acee119
and
http://hg.openjdk.java.net/jdk9/hs-gc/hotspot/rev/d4f303d3104c

/Mikael

>
> But alas, we're still hitting this crash -- essentially identical stack
> -- even with the patch applied (to 1.7).  I'd have commented on the bug,
> but don't have a login.
>
> I don't have STR, unfortunately, but we run thousands of tasks every day
> and a goodly percentage will crash in this way -- so it's very
> repeatable, if not exactly on-demand.
>
> I'm very highly motivated to assist in any way I can, if someone
> familiar with G1 wants to have a crack at diagnosing this.
>
> Cheers,
>
> -Phil