Re: Unexpected JVM crash, assistance requested

On 12 Nov 2018, at 18:00, java400-l-request@xxxxxxxxxxxx wrote:

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Today's Topics:

1. RE: JDBC with Kerberos authentication? (Justin Taylor)
2. Unexpected JVM crash, assistance requested (Matt Pryor)
3. Re: Unexpected JVM crash, assistance requested (David Gibbs)
4. Domino HTTPJVMMaxHeapSize (Rob Berendt)


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message: 1
date: Mon, 12 Nov 2018 13:47:29 +0000
from: Justin Taylor <JUSTIN@xxxxxxxxxxxxx>
subject: RE: JDBC with Kerberos authentication?

For posterity, here's my working sample https://github.com/Justin-E-Taylor/jt400_kerberos.

Thanks



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message: 2
date: Mon, 12 Nov 2018 16:16:36 +0000
from: Matt Pryor <pryor@xxxxxxxxxxxxxxxxxxxxxxxxxx>
subject: Unexpected JVM crash, assistance requested

Hi there

JVM specifics below:

java version "1.8.0_181"


Java(TM) SE Runtime Environment (build 8.0.5.20 -
pap3280sr5fp20-20180802_01(SR5 FP20))

IBM J9 VM (build 2.9, JRE 1.8.0 OS/400 ppc-32-Bit 20180731_393394 (JIT
enabled, AOT enabled)


The JVM appears to crash with the following entry in the job log:


Message . . . . : Object domain or storage protection error for
offset
X'00000000024941E0' in object QJVACMDSRVTLXDRIVER
907159.
Cause . . . . . : A program tried to use a blocked instruction, access
a
system domain object, or make invalid use of a protected page. The
violation
type is 3. The violation type indicates the type of error: 1-Object
domain
violation. 2-Test Pointer Target Addressability (TESTPTA) violation.
3-Read

protection error.

Has anyone experienced anything similar or able to point to any
suggestions? Please let me know any other information I can provide.

Many thanks


--
Matt Pryor
Software Developer

The International Presence Group of Companies
EMAIL: pryor@xxxxxxxxxxxxxxx
URL: www.International-presence.com


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message: 3
date: Mon, 12 Nov 2018 10:25:19 -0600
from: David Gibbs <david@xxxxxxxxxxxx>
subject: Re: Unexpected JVM crash, assistance requested

On 11/12/2018 10:16 AM, Matt Pryor wrote:
Message . . . . : Object domain or storage protection error for
offset X'00000000024941E0' in object QJVACMDSRVTLXDRIVER 907159.
Cause . . . . . : A program tried to use a blocked instruction,
access a system domain object, or make invalid use of a protected
page. The violation type is 3. The violation type indicates the type
of error: 1-Object

What OS version?

david

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message: 4
date: Mon, 12 Nov 2018 11:25:53 -0500
from: Rob Berendt <rob@xxxxxxxxx>
subject: Domino HTTPJVMMaxHeapSize

I have a Java question about Domino.
I have a notes.ini setting which works differently on one lpar than on
another. I can understand the possibilities: Memory differences, etc.

From the case:

<snip>
The default for os400 is 1G for all defaults so it is not clear on why we
got a 256 meg setting, the only way that could happen is if
HTTPJVMMaxHeapSize does not exist or cannot be found and the other JVM
setting for the Agent manager is set JavaMaxHeapSize=256, then
HTTPJVMMaxHeapSize will be set to the JavaMaxHeapSize.
This setting is not touched if it already exists, if the setting does not
exist it will be initialized to something (either the default of 1 gig or
if JavaMaxHeapSize.is present then the value specified by JavaMaxHeapSize.
With regard to the 4G setting failing, the reason for that is the JVM will
try and allocate the heap (4g) at startup, if it cannot allocate that much
memory then one will get a too large setting, the possibility is that the
OS400 JVM may be limited to 2 gig heap, one could try and specify 2148M
(instead of 2048) and see if that works, if that works then the issue will
be the JVM could not allocate a 4G heap.
</snip>

Both lpars are IBM i 7.3 at same PTF levels.
Both are Power 9's. One is on a 41A and the other is on a 42A. The 42A
works at 4G, the 41A only works at 2G. Both lpars are setup for Domino.
QCTLSBSD = QBASE.

DSPSYSSTS

42A:
Sys Pool Reserved Max ------DB------- ----Non-DB-----
Pool Size M Size M Act Faults Pages Faults Pages
1 2217.94 1148.35 +++++ .0 .0 .0 .0
2 28467.86 12.14 393 .0 .0 .0 4.2
3 1645.16 .00 82 .0 .0 2.4 2.6
4 81.02 .00 5 .0 .0 .0 .0

41A:
System Pool Reserved Max -------DB------- -----Non-DB-----
Pool Size (M) Size (M) Active Faults Pages Faults Pages
1 8102.97 1184.71 +++++ .0 .0 .0 .0
2 19086.12 16.43 373 .0 .0 .0 .0
3 4898.78 .00 163 .0 .0 4.0 5.2
4 324.11 .00 5 .0 .0 .0 .0

Is there some other Java setting I am missing?


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com




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