Closed as program error.
See Problem Summary.
APAR NUMBER: PJ40237 PRODUCT: z/TPF FUNCTIONAL AREA: TAPE I/O AND ERROR RECOVERY SHIPPED IN PUT: 10 ABSTRACT: 3590 channel-error recovery can exhaust system SWBs, causing a CTL-64C00 system error PACKAGE CONTENTS: Source Segments: (C) base/cp/cefe.cpy (C) base/cp/ceft.cpy (C) base/macro/dctirb.mac Object Only Binaries: None. Configuration Independent Binaries: None. Support Files: None. OTHER BINARIES TO BUILD: YES (C) <sys>/load/CPS0.so (C) <sys>/obj/cctape.o (C) os390/bin/amx1.pds (C) os390/bin/ppcp.pds (C) os390/bin/sadump.obj (C) os390/obj/amx1.o (C) os390/obj/ccmcdc.o (C) os390/obj/sadump.o (C) os390/obj/stpp.o COMMENTS: When an I/O interruption is received from a 3590 tape device indicating secondary status without primary status and one or more channel errors, control is eventually passed to routine CPMPNSTAT in segment CEFT of CP CSECT CCTAPE. If it is subsequently determined that the current interruption status must be merged with the status from the previous interruption, containing the primary status, control passes to BLDBASIRB. After merging the two interruptions, control is passed to routine LOCATECCW to re-process the merged interruption. However, since the logic prior to merging the two interruptions uses the current interruption status rather than the merged interruption status, it will again be determined that the two interruptions are to be merged, after which control is again passed to LOCATECCW, causing an infinite loop. As part of this processing, repeated executions of CXFRC macros will eventually cause the system to run out of SWBs, causing a CTL-64C00 catastrophic system error.
SOLUTION: The 3590 channel-error recovery routine in segment CEFT of CP CSECT CCTAPE has been modified to correctly merge primary- and secondary-status interruptions and continue processing, rather than returning to routine LOCATECCW to reprocess the merged interruption. COREQS: NO None. MIGRATION CONSIDERATIONS: NO None. BUILD COMMANDS AND INSTRUCTIONS: YES #maketpf commands for linux maketpf -f CPS0 cctape.o maketpf CPS0 link #maketpf commands for z/OS maketpf -f amx1 amx1.o maketpf -f ppcp ccmcdc.o stpp.o maketpf -f sadump sadump.o maketpf amx1 link maketpf ppcp link maketpf sadump link UPDATED INFORMATION UNITS: NO None. See your IBM representative if you need additional information. DOWNLOAD INSTRUCTIONS: http://www.ibm.com/software/htp/tpf/maint/maintztpf.html APAR URL: http://www.ibm.com/software/htp/tpf/ztpfmaint/put10/PJ40237.htm
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R110 PSY UP
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