APAR status
Closed as canceled.
Error description
*************************************************************** * * * -SUBJECT OF INFO APAR- LAST UPDATE: 01/24/96 BCB for DCM * * CICS/ESA r4.1 customers using UPGRADE with NSR files * * * *************************************************************** +-------------------------------------------------------------+ | | | - DETAIL DISCUSSION OF PURPOSE FOR INFO APAR - | | With transaction isolation, an abend0c4 may occur in vsam | | when updating an NSR file that requires UPGRADE processing. | | When the UPGRADE table is released by an rpl request, vsam | | may continue processing another rpl under the same subspace.| | The abend0c4 may occur attempting to modify storage owned | | by that rpl when running under the same subspace. | | To circumvent this problem, LSR should be specified to | | ensure the synchronous only requests are made to vsam. | | | | | |-------------------------------------------------------------| | | | - ADDITIONAL REFERENCES - OW16189 | |-------------------------------------------------------------| | | | -TECHNICAL INFORMATION - | | NSR requests are asynchronous. We have found vsam may not | | always schedule an IRB (which runs under base space) to | | restart an asynchronous request when the UPGRADE table | | becomes free. Since vsam does not switch subspaces, an | | rpl may be resumed under the wrong subspace. When data is | | validly moved into the area owned by that task, the | | abend0c4 occurs because we are in the wrong subspace. | | This problem can also occur on VSAM datasets when an | | exclusive control error is encountered and VSAM needs to | | update the RPL message area (RPLERMSA) with the request that| | is causing the conflict. So, this problem can occur for | | tasks that do not have alternate index processing involved. | |-------------------------------------------------------------| | | | -IF THERE ARE ANY SUGGESTIONS TO IMPROVE THIS INFORMATIONAL | | APAR, PLEASE SUBMIT A PROBLEM RECORD TO CICS LEVEL 2 | | USING THE APPROPRIATE COMPONENT ID. | | | | WE APPRECIATE YOUR SUGGESTIONS. | | | |-------------------------------------------------------------| | | | KEYWORDS: CICS CICSINFO RALINFO | | | | **** CICS/OS/MVS/ESA **** | | DESCRIPTION COMPID FESN REL | | CICS/ESA 4.1.0 565501800 0566091 100 | | 410 R410 565514700 200 | | R510 R520 5697E9300 300 | | R530 R210 5655M1500 400 | | R400 R500 500 | |-------------------------------------------------------------| | END OF INFO | +-------------------------------------------------------------+ NOTE: Upgrade processing does not have to be active to receive ABEND0C4 in VSAM csects. For instance, users may experience ABEND0C4 in IDA019R4 when VSAM moves the record area into the RPLAREA (VSWAREA) with a MVCL when there is no alternate index or path processing. Abend0c4 IDA019RA PIC4 during MVC from RPL +24 ( RPLARG ) to PLHKEY. NSR ASYNCHRONOUS TRansaction ISOLATION = YES Note also that an abend may be seen in VSAM module IDA019RM, due to the same underlying problem of NSR and transaction isolation. Isolate transiso traniso. It should be emphasized that transaction isolation and NSR can result in this problem occurring. Use of TRANISO for only some transactions (that don't use NSR files) will not guarantee the problem will not be seen, since VSAM can still asynchronously process work for an ISOLATE(YES) task during work for an ISOLATE(NO) task. Additional Keywords: PM07304 IDA019L1 DFHFC0001 Abend0C4 at offset FFFF in DFHFCVR. FFFFFFFF
Local fix
Problem summary
Problem conclusion
Temporary fix
Comments
Close INFO APAR CAN
APAR Information
APAR number
II09208
Reported component name
PB LIB INFO ITE
Reported component ID
INFOPBLIB
Reported release
001
Status
CLOSED CAN
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
1996-01-24
Closed date
1996-01-24
Last modified date
2014-12-23
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Applicable component levels
[{"Business Unit":{"code":null,"label":null},"Product":{"code":"SG19O","label":"APARs - MVS environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"001","Edition":"","Line of Business":{"code":"","label":""}},{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEPEK","label":"Db2 for z\/OS"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"001","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]
Document Information
Modified date:
23 December 2014