PH18993: V32 INTERNAL DEFECTS FIX AND ENHANCEMENT

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• v32 internal defects fix and enhancement
  

Local fix

• n/a
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: 01.All z/os Explorer and IDz users           *
  *                 02.z/OS sysprog                              *
  *                 03.All IDz and zExpl users                   *
  *                 04.All z/OS Explorer and IDz users           *
  *                 05.All zExpl and IDz users                   *
  *                 06.All zExpl and IDz users                   *
  *                 07.All zExpl and IDz users                   *
  ****************************************************************
  * PROBLEM DESCRIPTION: 01.FEKLOGS do not concatenate           *
  *                         DSTORE_LOG_DIRECTORY with            *
  *                         userlog/dstorelog/$LOGNAME/ when it  *
  *                         is set to a value other than none    *
  *                      02.Conditionally initialize key         *
  *                         environment variables                *
  *                      03.TLS 1 and 1.1 is no longer           *
  *                         considered secure, so in RSE we      *
  *                         will disable them by default         *
  *                      04.Due to zOS 2.4 announcement, we      *
  *                         need to have RSE adding support for  *
  *                         TLS 1.3                              *
  *                      05.A change in DGRAM socket writing     *
  *                         and reading required to fix the      *
  *                         issue in logon message length        *
  *                         limitation has caused a side         *
  *                         effect, resulting the delay in the   *
  *                         reading end in the processing of     *
  *                         the message client listing           *
  *                         responses from the threadpool to     *
  *                         daemon.                              *
  *                      06.Thread pool process is marked as     *
  *                         timeout when it is stuck in a new    *
  *                         client connection request and        *
  *                         Daemon is time out while waiting     *
  *                         for its response.                    *
  *                      07.RSE is normally started up with      *
  *                         default _BPX_SHAREAS=YES             *
  *                         environment setting to optimize the  *
  *                         cost in spawning supported           *
  *                         processes by requesting the same     *
  *                         address space as parent. System      *
  *                         with the program /bin/sh, which is   *
  *                         used for ThreadPool creation,        *
  *                         having sticky bit unset would have   *
  *                         the created ThreadPool terminated    *
  *                         by SIGKILL (9) issued by Daemon      *
  *                         shortly after it is created or       *
  *                         after a client connection attempt.   *
  ****************************************************************
  01.When -DDSTORE_LOG_DIRECTORY is set, FEKLOGS fails to
     concatenate host server log and user log, as a result
     FEKLOGR will return ** INFO ** <user log path> does not
     exist, <user> has not used the product with return code 8.
     This is due to incorrect intermediate processing in the
     FEKLOGS rex script
  02.Enhancement to conditionally initialize key environment
     variables PATH, LIBPATH, CLASSPATH, and STEPLIB.
     Initialization can be prevented by defining environment
     variable RSE_NO_INIT before RSE startup, e.g.
     RSE_NO_INIT="PATH:STEPLIB"
  03.TLS 1 and 1.1 is no longer considered secure, so in RSE we
     will disable them by default
  04.Due to zOS 2.4 announcement, we need to have RSE adding
     support for TLS 1.3
  05.When the condition happens, the message receiving timing is
     unexpectedly. As a result, it may lead to an out-of-sync
     delay for other message flows using the same inter-process
     communication channel such as lock owner information queries
     required in opening a dataset member.
  06.A timeout thread pool is hardly considered for next
     connection request; its message pipe might also be out of
     sync.
  07.When ThreadPool is created within the same address space as
     that of Daemon, the ThreadPool would be terminated by
     SIGKILL issued by Daemon. _BPX_SHAREAS=YES setting is not in
     effect when the program file used in spawning has the sticky
     bit set. A system with a sticky-bit-on /bin/sh still creates
     the ThreadPool within its own address space. A system with a
     sticky-bit-off /bin/sh would have all ThreadPool created
     within the same address space as Daemon and would experience
     the SIGKILL problem shortly after it is started up.
  

Problem conclusion

• 01.Fixed the feklogs script bug as well as modifying ExistsUSS
     Access syscall rc code check from R_OK to F_OK
  02.Enhancement to conditionally initialize key environment
     variables
  03.Updated the corresponding rse environment variables
  04.Added TLS 1.3 support, it can be used once supported Java is
     installed.
  05.The additional msg length peeking while reading from a DGRAM
     socket might cause a failure in read-ready status of the
     socket in the next subsequent read. When the condition
     happens, the message receiving timing is unexpectedly. The
     change of msg length peeking is removed; the logon message
     upper bound has been increased as a replacement fix. Note
     that further investigation and change for socket
     communication would be needed for a much larger
     communication load as needed.
  06.The server module is updated to operate as a thread and drop
     a stuck connection request when informed by Daemon on the
     timeout. In the next configurable-interval pinging request
     from Daemon, if the thread pool is able to respond, its
     timeout status is reset and it would be considered to be
     re-selected for the next connection request.
  07.It is a requirement that a ThreadPool must be created in an
     address space different from Daemon; otherwise, it would be
     terminated shortly after created. Furthermore, dataset lock
     owner information tracking based on ThreadPool address space
     id (ASID) unique indexing scheme. Daemon now creates
     ThreadPool with A _BPX_SHAREAS=NO in environment argument
     for in spawning call to have the ThreadPool created within
     its own address space regardless /bin/sh sticky bit setting.
  

Temporary fix

Comments

APAR Information

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

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

  UI66345

Modules/Macros

• FEJENF70 FEJJCNFG FEJJJCL  FEJJMON  FEJTSO   FEK1SMPE FEK2RCVE
  FEK3ALOC FEK4ZFS  FEK5MKD  FEK6DDEF FEK7APLY FEK8ACPT FEK@CERR
  FEK@CONE FEK@CONF FEK@CUST FEK@DEB  FEK@DESC FEK@FLOW FEK@GEN
  FEK@GENW FEK@ISPF FEK@IVP  FEK@IVPD FEK@IVPW FEK@JCN1 FEK@JCNE
  FEK@JESJ FEK@MAIN FEK@MIGO FEK@OPTE FEK@OPTG FEK@OPTN FEK@PRIM
  FEK@RSE1 FEK@RSEO FEK@STRT FEK@TAB1 FEK@TAB2 FEK@TAB3 FEK@WRK1
  FEK@WRK2 FEK@WRK3 FEK@WRK4 FEK@WRK5 FEKAPPCC FEKAPPCL FEKAPPCX
  FEKATTR  FEKDSI   FEKEESX0 FEKFASIZ FEKFATT1 FEKFBLD  FEKFCIPH
  FEKFCLIE FEKFCMOD FEKFCMPR FEKFCMSG FEKFCOMM FEKFCOPY FEKFCOR6
  FEKFCORE FEKFDBGM FEKFDIR  FEKFDIR6 FEKFDIVP FEKFDST0 FEKFDST1
  FEKFDST2 FEKFENVF FEKFENVI FEKFENVP FEKFENVR FEKFENVS FEKFEPL
  FEKFERRF FEKFICUL FEKFISPF FEKFIVP0 FEKFIVPA FEKFIVPD FEKFIVPI
  FEKFIVPJ FEKFIVPT FEKFJESM FEKFJESU FEKFJVM  FEKFLATR FEKFLDSI
  FEKFLDSL FEKFLEOP FEKFLOGS FEKFLPTH FEKFMAI6 FEKFMAIN FEKFMINE
  FEKFMNTL FEKFNTCE FEKFOMVS FEKFPATT FEKFPLUG FEKFPTC  FEKFRIVP
  FEKFRMSG FEKFRSES FEKFRSRV FEKFSCMD FEKFSEND FEKFSSL  FEKFSTUP
  FEKFT000 FEKFT001 FEKFT002 FEKFT003 FEKFT004 FEKFT005 FEKFTIVP
  FEKFTSO  FEKFUTIL FEKFVERS FEKFXITA FEKFXITL FEKFZOS  FEKHCONF
  FEKHCUST FEKHDEB  FEKHDESC FEKHFLOW FEKHGEN  FEKHISPF FEKHIVP
  FEKHIVPD FEKHJESJ FEKHMAIN FEKHMIGO FEKHOPTE FEKHOPTN FEKHPRIM
  FEKHRSE1 FEKHRSEO FEKHSTRT FEKHTAB1 FEKHTAB2 FEKINIT  FEKKEYS
  FEKLOGR  FEKLOGS  FEKM00   FEKM01   FEKM02   FEKMKDIR FEKMOUNT
  FEKMSGC  FEKMSGS  FEKRACF  FEKRSED  FEKSAPF  FEKSAPPL FEKSBPX
  FEKSCLAS FEKSCLOG FEKSCMD  FEKSCPYM FEKSCPYU FEKSDSN  FEKSENV
  FEKSETUP FEKSISPF FEKSJCFG FEKSJCMD FEKSJMON FEKSLPA  FEKSPROG
  FEKSPTKT FEKSRSED FEKSSERV FEKSSTC  FEKSSU   FEKSUSER FEKXCFGE
  FEKXCFGI FEKXCFGM FEKXCFGT FEKXMAIN FEKXML
  

Fix information

• Fixed component name

  EXP FOR Z/OS HO

• Fixed component ID

  5655EXP23

Applicable component levels

• R320 PSY UI66345

     UP19/11/19 P F911

Fix is available

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