RE: Unexpected JVM crash, assistance requested (Gan Zhang)

Matt:

I forgot to mention that if you have the MGTools installed on your system,
then option 10 on that menu will just about automate sending things to IBM.

To get MG Tools (if you don't already have them) see:

http://www-01.ibm.com/support/docview.wss?uid=nas8N1011297

MGTools is one of the most important diagnostic tools out there. It helps
IBM figure out what's going on and as you use them a little, you can assist
yourself as well.

If the tools are already on the system check for updates (menu option 13)
and follow the prompts. It can automatically download and update the tools
on the system. (with proper authority of course)


--
Jim Oberholtzer
Agile Technology Architects

-----Original Message-----
From: JAVA400-L <java400-l-bounces@xxxxxxxxxxxx> On Behalf Of Matt Pryor
Sent: Monday, November 19, 2018 9:05 AM
To: java400-l@xxxxxxxxxxxx
Subject: Re: Unexpected JVM crash, assistance requested (Gan Zhang)

Dear Mr Zhang

Thanks for your reply.

1) Please advise how we should raise a PMR with your team. Is there an email
address we should write to or a website we should visit?
2) The javacore and core dumps total over 2Gb in size, do you have an FTP
site we can upload them to?
3) I'm not sure what 4700 0012 vlogs are, or how to obtain them - please
could you explain.

Thanks and regards
Matt

2. Re: Unexpected JVM crash, assistance requested (Gan Zhang)

Looks like you are using the latest Java 80 on your system. I would
suggest you open a PMR to my team for further investigation.

thanks.From

the stack , looks like it's an issue from JIT component. For this
kind of
crash , we usually need "javacore", "core" dumps together with the 4700
0012 vlogs collected. thx.

Best regards.

____________________________________________________________________________
________________

Gavin, Zhang Gan --
[1]

https://w3-connections.ibm.com/profiles/html/profileView.do?key=d77158d7-c5c
d-4e6e-a90d-23dddc9cbaba&lang=en

IBM i PASE(AIX)/J9(Java SDK) Tech/Team Lead,
Email: zhanggan@xxxxxxxxxx
Phone: +86-10-82452719
Address: 1/F, 28, ZhongGuanCun Software Park, No.8 Dong Bei Wang West
Road, Haidian District, Beijing P.R.China 100193
J9 on i:
[2]
https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki
/IBM%20i%20Technology%20Updates/page/Java%20on%20IBM%20i



----- Original message -----
From: Matt Pryor <pryor@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Sent by: "JAVA400-L" <java400-l-bounces@xxxxxxxxxxxx>
To: java400-l@xxxxxxxxxxxx
Cc:
Subject: Re: Unexpected JVM crash, assistance requested
Date: Thu, Nov 15, 2018 10:58 PM

Hi there

After another JVM crash yesterday we've found some more information

in

std
err:

Assertion failed at /afs/

rchland.ibm.com/usr8/j9/src/rebuilt/jdk80/64bit/sr5fp20.v7r3/jre/lib/ppc64/c
ompressedrefs/compiler/../omr/c

ompiler/codegen/OMRTreeEvaluator.cpp:348: false
VMState: 0x0005ff04
badILOp BadILOp cannot be evaluated
compiling

com/internationalpresence/impscloudgateway/util/AS400LogHandler.flush()V
at
level: hot
assumeDontCallMeDirectlyImpl(const char*,int,const char*,const
char*,char*,bool)+0x4d0
TR::fatal_assertion(const char*,int,const char*,const
char*,...)+0x40

OMR::TreeEvaluator::badILOpEvaluator(TR::Node*,TR::CodeGenerator*)+0x4c
OMR::CodeGenerator::evaluate(TR::Node*)+0x510
J9::CodeGenerator::doInstructionSelection()+0x4ed8

OMR::CodeGenPhase::performInstructionSelectionPhase(TR::CodeGenerator*,TR::C
odeGenPhase*)+0x5c0

OMR::CodeGenPhase::performAll()+0x2b4
OMR::CodeGenerator::generateCode()+0x484
OMR::Compilation::compile()+0x2188

TR::CompilationInfoPerThreadBase::compile(J9VMThread*,TR::Compilation*,TR_Re
solvedMethod*,TR_J9VMBase&,TR_OptimizationPlan*,const

TR
::SegmentAllocator&)+0x161c

TR::CompilationInfoPerThreadBase::wrappedCompile(J9PortLibrary*,void*)+0x1cd
4

omrsig_protect+0x5a8


TR::CompilationInfoPerThreadBase::compile(J9VMThread*,TR_MethodToBeCom
piled*,J9::J9SegmentProvider&)+0x774

TR::CompilationInfoPerThread::processEntry(TR_MethodToBeCompiled&,J9::J9Segm
entProvider&)+0x854

TR::CompilationInfoPerThread::processEntries()+0x7f8

protectedCompilationThreadProc(J9PortLibrary*,TR::CompilationInfoPerThread*)
+0x4e0

omrsig_protect+0x5a8
compilationThreadProc(void*)+0x5b8
thread_wrapper+0x254
_pthread_body+0x138
+0x0
The assert subroutine failed: 0, file /afs/

rchland.ibm.com/usr8/j9/src/rebuilt/jdk80/64bit/sr5fp20.v7r3/jre/lib/ppc64/c
ompressedrefs

/compiler/../omr/compiler/infra/Assert.cpp, line 72
JVMDUMP039I Processing dump event "abort", detail "" at 2018/11/15
07:41:09
- please wait.
JVMDUMP032I JVM requested System dump using
'//core.20181115.074109.435449.0001.dmp' in response to an event
JVMDUMP010I System dump written to
//core.20181115.074109.435449.0001.dmp
JVMDUMP032I JVM requested Java dump using
'//javacore.20181115.074109.435449.0002.txt' in response to an event
JVMDUMP010I Java dump written to
//javacore.20181115.074109.435449.0002.txt
JVMDUMP032I JVM requested Snap dump using
'//Snap.20181115.074109.435449.0003.trc' in response to an event
JVMDUMP010I Snap dump written to
//Snap.20181115.074109.435449.0003.trc
JVMDUMP007I JVM Requesting JIT dump using
'//jitdump.20181115.074109.435449.0004.dmp'
#JITDUMP: vmThread=000000003000EF00 Crashed while printing out
current
IL.JVMDUMP010I JIT dump written to //jitdump.20181115.074109
.435449.0004.dmp
JVMDUMP013I Processed dump event "abort", detail "".

Does this help pinpoint the cause?

Thanks
Matt

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