Re: Off topic Increasing JVM heapsize is throwing errors

From: msanjeevk <sanjeevorcle_at_gmail.com>
Date: Thu, 7 Jan 2016 14:49:59 -0800
Message-ID: <CAJ2uQadEMdhdQSG36wcyco+oD6hsMykzq5-Dkpyad6SkxGidQw_at_mail.gmail.com>

Thats right -- something wrong with e-bus java.. I tried same command with OS version of java and it succeeded:

/usr/bin/java -server -verbose:gc -Xmx2048M -Xms2048M -XX:MaxPermSize=1024M -version
java version "1.6.0_36"
OpenJDK Runtime Environment (IcedTea6 1.13.8) (rhel-1.13.8.1.el6_7-x86_64) OpenJDK 64-Bit Server VM (build 23.25-b01, mixed mode)

I have logged case with oracle

Thanks,
Sanjeev.

On Thu, Jan 7, 2016 at 2:31 PM, <dimensional.dba_at_comcast.net> wrote:

> This is not a free memory problem.
> The error
> free(): invalid pointer: 0xf7758250
>
> represents the code calling the free() command to free previously
> allocated memory and the pointer stored in a memory variable points to
> memory that doesn't not exist, has already been freed or was not allocated
> by your application.
>
> Basically a bug with many potential causes.
>
> Since it appears to be Oracle apps, unless this is custom code I would
> open a support case with Oracle.
> If it is a custom app then troubleshooting will be a little harder but not
> impossible.
>
>
>
>
> ------------------------------
> *From: *"msanjeevk" <sanjeevorcle_at_gmail.com>
> *To: *"ORACLE-L" <oracle-l_at_freelists.org>
> *Sent: *Thursday, January 7, 2016 1:37:58 PM
> *Subject: *Off topic Increasing JVM heapsize is throwing errors
>
>
> All,
>
> e-business 12.1.2 env
> OS: Oracle Linux Server release 6.6
> Linux xyz 2.6.32-300.32.3.el6uek.x86_64 #1 SMP Thu Sep 27 10:39:05 PDT
> 2012 x86_64 x86_64 x86_64 GNU/Linux
>
> To address long garbage collection times and outofmemoryerrors trying to
> increase heapsize for JVM
>
> There is 13GB free on the box before running below command:
>
> top - 13:33:49 up 77 days, 4:33, 13 users, load average: 0.10, 0.08, 0.08
> Tasks: 291 total, 1 running, 290 sleeping, 0 stopped, 0 zombie
> Cpu(s): 0.5%us, 0.2%sy, 0.0%ni, 99.2%id, 0.0%wa, 0.0%hi, 0.0%si,
> 0.0%st
> Mem: 49559264k total, 36163844k used, *13395420k free*, 299616k buffers
> Swap: 18841520k total, 0k used, 18841520k free, 22636024k cached
>
> free
> total used *free *shared buffers
> cached
> Mem: 49559264 36167308 *13391956 *1364 299616
> 22639036
> -/+ buffers/cache: 13228656 36330608
> Swap: 18841520 0 18841520
>
> java -server -verbose:gc *-Xmx2048M -Xms2048M -XX:MaxPermSize=684M*
> -version
> java version "1.6.0_07"
> Java(TM) SE Runtime Environment (build 1.6.0_07-b06)
> Java HotSpot(TM) Server VM (build 10.0-b23, mixed mode)
>
> Even if we increase by 1M after this limit it throws errors:
>
> java -server -verbose:gc -Xmx2048M -Xms2048M -XX:MaxPermSize=685M -version
> Error occurred during initialization of VM
> Could not reserve enough space for object heap
> *** glibc detected ***
> /app/of1_dev/r12/apps/tech_st/10.1.3/appsutil/jdk/bin/java: free(): invalid
> pointer: 0xf7758250 ***
>
> wondering why it is failing when there is free RAM available.
>
> Thanks your your time.
>
> Regards,
> Sanjeev.
>
>

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Received on Thu Jan 07 2016 - 23:49:59 CET