PH12578: IBM EXPLORER FOR Z/OS 14.0 THREADPOOL SERVER JVM FALLS BACK TO *TIMEOUT* STATE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• IBM Explorer for z/OS 14.0 Thread Pool server JVM('s) falls
  back to *timeout* state before being killed
  
  SYSLOG D shows one or more messages:
  BPXM023I (RSED1) 398
  ProcessId(16778758) Memory Usage (11%) Clients(10) Order(2)
  *timeout*
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: 01.All z/os Explorer and IDz users           *
  *                 02.All zExpl and IDz users                   *
  *                 03.All zExpl and IDz users                   *
  *                 04.All IDz and zExpl users                   *
  *                 05.All z/OS Explorer 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.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.                    *
  *                      03.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.                              *
  *                      04.TLS 1 and 1.1 is no longer           *
  *                         considered secure, so in RSE we      *
  *                         will disable them by default         *
  *                      05.Due to zOS 2.4 announcement, we      *
  *                         need to have RSE adding support for  *
  *                         TLS 1.3                              *
  ****************************************************************
  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.A timeout thread pool is hardly considered for next
     connection request; its message pipe might also be out of
     sync.
  03.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.
  04.TLS 1 and 1.1 is no longer considered secure, so in RSE we
     will disable them by default
  05.Due to zOS 2.4 announcement, we need to have RSE adding
     support for TLS 1.3
  

Problem conclusion

• 01.Fixed the feklogs script bug
  02.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.
  03.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.
  04.Updated the corresponding rse environment variables
  05.Added TLS 1.3 support, it can be used once supported Java is
     installed.
  

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:

  UI65846

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
  FEKDSI   FEKEESX0 FEKFASIZ FEKFBLD  FEKFCIPH FEKFCLIE FEKFCMOD
  FEKFCMPR FEKFCMSG FEKFCOMM FEKFCOPY FEKFCOR6 FEKFCORE FEKFDBGM
  FEKFDIR  FEKFDIR6 FEKFDIVP FEKFDST0 FEKFDST1 FEKFDST2 FEKFENVF
  FEKFENVI FEKFENVP FEKFENVR FEKFENVS FEKFEPL  FEKFICUL FEKFISPF
  FEKFIVP0 FEKFIVPA FEKFIVPD FEKFIVPI FEKFIVPJ FEKFIVPT FEKFJESM
  FEKFJESU FEKFJVM  FEKFLDSI FEKFLDSL FEKFLEOP FEKFLOGS FEKFLPTH
  FEKFMAI6 FEKFMAIN FEKFMINE FEKFMINS FEKFNTCE FEKFOMVS FEKFPATT
  FEKFPRDS FEKFPTC  FEKFRIVP FEKFRMSG FEKFRSES FEKFRSRV FEKFSCMD
  FEKFSEND FEKFSSL  FEKFSTUP FEKFT000 FEKFT001 FEKFT002 FEKFT003
  FEKFT004 FEKFT005 FEKFT006 FEKFT007 FEKFT008 FEKFT009 FEKFT010
  FEKFT011 FEKFT012 FEKFT013 FEKFT014 FEKFT015 FEKFT016 FEKFT017
  FEKFT018 FEKFT019 FEKFT020 FEKFT021 FEKFT022 FEKFT023 FEKFT024
  FEKFTIVP FEKFTRKS FEKFTSO  FEKFUTIL FEKFVERS FEKFXITA FEKFXITL
  FEKFZME  FEKFZMF  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

• R300 PSY UI65846

     UP19/10/22 P F910

Fix is available

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