PI76878: ZWAS LE ESTAE EXTENSION BBORLEXT UPDATE TO SUPPRESS DUMPS FOR PGM CHECKS OF TYPE PIC 7 / 0C7 WITH DXC CODE OF X'00' / 0X00

Fixes are available

APAR status

Closed as program error.

Error description

An optimization for the JIT Compiler in Java 8 for DAA
(Data Access Acceleration, to access data in the COBOL Binary
Coded Decimal (BCD) format) can emit code which makes use of
hardware instructions designed to handle data in the BCD format.
If these instructions encounter data that is not in BCD format
the instruction will generate a Data Exception, interrupt code
is 0c7 with a DXC code of x'00' / 0x00.
DXC code 00 -> Decimal-operand data exception
In a WebSphere environment on z/OS this causes the WebSphere
provided LE Extension Routine BBORLEXT to take a SVC Dump.
Dump title is:
DUMP TITLE=COMPON=WEBSPHERE Z/OS,  COMPID=5655I3500,
ISSUER=BBORLEXT,ABEND IN (MODULE NAME NOT KNOWN)
Dump analysis would show the pgm check in JIT Compiled code
(Use jdmpview command "info jitm" to dump the addresses in
memory for the compiled code).
The method involved will either be, or will have inlined, method
com/ibm/dataaccess/DecimalData.convertPackedDecimalToLong
The failing instruction will most likely be a EX pointing to
a ZAP. Please open a PMR for help with analysis is you are
not sure if this APAR applies to your specific case.
This APAR is taken to suppress the dump for this case.
Expected operation is that control returns to the JVM signal
handler, operation continues and an IllegalArgumentException
is thrown.

Local fix

Switch -Xjit:disableIntrinsics causes the JIT to not emit
the instructions used for DAA.


After setting -Xjit:disableIntrinsics you should
clear the Shared Class Cache with clearClassCache.sh for the
server involved, otherwise an AOT compiled version of the DAA
code with the DAA instructions might still be used.

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server V8.5 and V9.0 for z/OS               *
****************************************************************
* PROBLEM DESCRIPTION: A dump of a abend 0c7 reason code       *
*                      00000000 is encountered when running    *
*                      WebSphere Application Server for z/OS.  *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Dump of a ABEND0C7/ABENDS0C7 reason code 00000000 is taken by
bborlext because application data was encountered that is not
in BCD format. bborlext should not take a dump because in Java
8 the JIT generates instructions like ZeroAndAdd that will
abend when bad data is encountered. The abend tells them there
was bad data and their signal handler gets control to go back
to the program with an appropriate exception.

Problem conclusion

Updated bborlext to not dump when an abend 0c7 reason code
00000000 occurs.

APAR PI76878 is currently targeted for inclusion in Fix Packs
8.5.5.12 and 9.0.0.5 of WebSphere Application Server.

Please refer to the Recommended Updates page for delivery
information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

In addition, please refer to URL:
http://www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
for Fix Pack PTF information.

Temporary fix

Comments

APAR Information

APAR number
PI76878
Reported component name
WEBSPHERE FOR Z
Reported component ID
5655I3500
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2017-02-20
Closed date
2017-04-26
Last modified date
2017-05-02

APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name
WEBSPHERE FOR Z
Fixed component ID
5655I3500

Applicable component levels

R850 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"850","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
04 May 2022

Tips

PI76878: ZWAS LE ESTAE EXTENSION BBORLEXT UPDATE TO SUPPRESS DUMPS FOR PGM CHECKS OF TYPE PIC 7 / 0C7 WITH DXC CODE OF X'00' / 0X00

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R850 PSY

Document Information

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