A fix is available
APAR status
Closed as program error.
Error description
CICS getting Short on Storage issues when running web service requests with large files attached to them. CICS is using a disproportionate amount of storage from its EDSALIM in order to process such requests. If EDSALIM is not increased by at least 100M then CICS will go short on storage SOS and issue message DFHSM0133 CICS is under stress (short on storage above 16MB). Looking at the containers and channel sizes used for a 6.5M attachment we find : DFHAHC-V1 channel contains 3 large containers: DFHREQUEST Data length X'677C73' DFHPARSE-OUTPUT Data length X'678604' DFHWS-BODY Data length X'677BAD' (above approx 6.5M each ) and channel is approx 19.5M CICS trace show further getmains for channel related storage : SM trace entries for task 2203: L800W AP 4E00 APCR ENTRY EXPORT_ALL 1FC0C060,SIBUS,0100023C , 00000000 L800W SM 0301 SMGF ENTRY GETMAIN 13683C8,YES,00,CHANBUFF,TASK31 L800W SM 0301 SMGF ENTRY GETMAIN 00000042,13683C8,YES,RZSVDATA L800W RZ 0111 RZSO EXIT SEND_REQUEST/OK L800W AP 4E01 APCR EXIT EXPORT_ALL/OK L800W SM 0301 SMGF ENTRY GETMAIN 00000042,1368494,YES,RZSVAREA L800W SM 0301 SMGF ENTRY GETMAIN 00000042,1368B17,YES,RZISBUFF L800W SM 1206 SMPQ *EXC* Insufficient_storage_to_satisfy_request ALLOCATE_PAGEPOOL_STORAGE,1C444E30,1368B20 Each of these are for 19M and SOS can easily result.
Local fix
Raise CICS EDSALIM value.
Problem summary
**************************************************************** * USERS AFFECTED: * * All CICS users. * **************************************************************** * PROBLEM DESCRIPTION: * * DFHSM0133 when CICS is acting as a Web * * Services provider, and a SOAP request * * that contains a large attachment is * * received. * **************************************************************** * RECOMMENDATION: * * . * **************************************************************** When CICS is acting as a Web Services provider and is sent a SOAP message with a large attachment, a large amount of storage is required to handle the request. Some of the allocations can be a multiple of the attachment size. When a context switch occurs, requests stream processing is used to start a new task, and more storage is used. Some of this, for example a large RZSVDATA buffer, is retained even though the data has already been copied to new allocation. The combined requirements of multiple large contiguous areas of storage can result in CICS SOS Above. Additional keywords: SM0133 MSGDFHSM0133
Problem conclusion
DFHRZRS send processing has been changed to FREEMAIN superfluous storage areas before starting the new task.
Temporary fix
Comments
APAR Information
APAR number
PI64337
Reported component name
CICS TS Z/OS V5
Reported component ID
5655Y0400
Reported release
000
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-06-16
Closed date
2016-07-26
Last modified date
2016-09-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI39645
Modules/Macros
DFHRZDM DFHRZDUF DFHRZIX DFHRZLN DFHRZNR2 DFHRZRG2 DFHRZRM DFHRZRS1 DFHRZSO1 DFHRZSO DFHRZTA DFHRZTCX DFHRZTR1 DFHRZTRI DFHRZXM DFHZIS2
Fix information
Fixed component name
CICS TS Z/OS V5
Fixed component ID
5655Y0400
Applicable component levels
R000 PSY UI39645
UP16/08/05 P F608
Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.
[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSGMGV","label":"CICS Transaction Server"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"5.3","Edition":"","Line of Business":{"code":"LOB35","label":"Mainframe SW"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG19M","label":"APARs - z\/OS environment"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"5.3","Edition":"","Line of Business":{"code":"","label":""}}]
Document Information
Modified date:
02 September 2016