Hotspot crash

[Volker Simonis]

Hi Steve,

unfortunately I was quite busy today so I just looked at the crash.

I agree that the warning are annoying and we will switch them off if
we will be not running with -XX:+Verbose.
But as far as I can see, they are basically harmless. The appear
because we've switched on compressed pointers by default on AIX and
whtat happens is that at startup the VM tries to find some "good"
addresses for the allocation of the heap. If this doesn't succeed (and
that's what the warnings basically say) that's no real problem. As I
said, it's annoying and we will switch them off. Until then you can
use the switch "-XX:-UseCompressedOops" to switch compressed pointers
off manually.

Regarding the actual error I'm a little bit confused. In that special
code the VM is actually only calling the bare os "malloc" functions
which seems to be unable to allocoate native memory. Does the VM fail
reproducible with this error? I saw in the hs_err.log file that the
machine is under high load:

load average:20.07 17.96 17.18

and the swap memory is nearly exhausted:


  physical total : 32212254720
  physical free  : 5296439296
  swap total     : 536870912
  swap free      : 483180544

while the machine still has 5 GB of free ram. Maybe, at the point
where malloc was called there where other processes running which used
additional memory?

Would it be possible to carve out the javac command which leads to the
error (i.e."Compiling 733 files for BUILD_FULL_JAVAC")

Otherwise I'll try to reproduce it myself.

Regards,
Volker


On Sun, Feb 10, 2013 at 9:04 PM, Steve Poole <spoole at linux.vnet.ibm.com> wrote:
> hi guys - I'm getting a crash (basically native out of memory) when trying to build JDK8 on AIX with latest and greatest JDK7u build.
>
> I built the jdk7u one myself according to the published instructions on Volkers cr page.
>
> The crash and log are available here    (build log at http://cr.openjdk.java.net/~spoole/log.txt    crash at http://cr.openjdk.java.net/~spoole/hs_err_pid13369358.log )
>
> The machine has 30GB of memory and what with the amount of warnings showing up I'm assuming its a bug :-)
>
> Let me know if there is anything I can do to work around this (or if you need more info)   I'm trying to use the autoconf process for JDK8 and this my first major hurdle.   Any help would be appreciated!
>
> Thanks
>
> Steve