PH32053: IBM DEVELOPER FOR Z SYSTEMS (IDZ) MENU MANGER FAILED WITH RC=20.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• IBM Developer for z Systems - IDz - v14.2.1
  Menu Manger failed with RC=20 when input some parameters value.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: 1. Server running early version of java 11   *
  *                 2. The server got affected.                  *
  *                 3. fekfdivp tool                             *
  *                 4. All RSE users using TSO interactive       *
  *                 gateway and keepAlive option off, invoking   *
  *                 TSO interactive command.                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: 1. The pipe count of the ThreadPool     *
  *                      keeps increasing when running under     *
  *                      the early version of Java 11.           *
  *                      When the pipe count (account for the    *
  *                      total fd cound of the process)          *
  *                      reaches the process limit, the          *
  *                      operation would fail.                   *
  *                      The issue does not exist in Java 8.     *
  *                      Its Process pipe is automatically       *
  *                      closed when the Process is done.        *
  *                      Another issue that with a heavy load    *
  *                      ThreadPool especially during user       *
  *                      logging off, concurrent access issue    *
  *                      in cleaning up the existing command     *
  *                      miner threads could stop the cleanup    *
  *                      abruptly and may cause left over        *
  *                      resource.                               *
  *                      2. Minimum supported ZOS level for      *
  *                      Java 1.8 is 2.2                         *
  *                      3. New printf call was flagged as       *
  *                      having possibility of buffer overflow.  *
  *                      4. With TSO interactive gateway, when   *
  *                      issuing an TSO interactive command      *
  *                      and entering input, users may           *
  *                      experience a failure with TSO gateway   *
  *                      RC 20.                                  *
  ****************************************************************
  1. There is a change in Process instance creation and
  termination in Java 11. The stdout-in-err pipes of a created
  Process must be closed explicitly or through a stream wrapper;
  otherwise, it will cause a leak. Destroying the process also
  helps.
  RSED ThreadPool leaks Process pipes through the usage of Java
  API  ProcessBuilder and Runtime exec API to create Process
  used in its operation.
  2. Native code for JMON, ZOS, and MVS servers should be
  compiled with OS target ZOSV2R2
  3. printf was known to have a buffer overflow with %s argument.
  4. When keepAlive option off, there might be a out of sync to
  keep the invoking TSO interactive command and the input
  entering step in the same TSO session, leading to the RC 20
  error.
  

Problem conclusion

• 1. - Due to the change in Java behavior around the Process
  pipe management in Java 11, RSED leaks Process pipe during its
  lifetime causing failure in its operation.
  Issue has been reported to Java team and awaiting for
  resolution in Java JDK.
  A work-around as to explicitly close a Process' pipe when done
  was introduced.
  - The common holder of a connection's command miner threads
  should be synchronized during cleanup or adding operation.
  2. Update build script with compile OS target set to ZOSV2R2
  3. The scan result is actually a noise as printf was used with
  argument constructed internally having bounded message.
  But introduce the alternative of sprintf and puts anyway,
  avoiding marking it as noise.
  4. To adjust the timing of the keepAliveThread's pinging
  execution for an interactive command in waiting input mode.
  Recalculate the wait (sleep) time for the pinging so that it
  could happen on time to keep the session valid w.r.t RSE CEA
  TSO processor and gateway client session timeout.
  It is to synchronize and keep alive the session to be used for
  both command issuing and input entering step when the RSE host
  is not running with the CEATSO keep alive option.
  

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:

  UI90162

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 FEKFDBG  FEKFDBG6 FEKFDBGM FEKFDIR  FEKFDIR6 FEKFDIVP
  FEKFDST0 FEKFDST1 FEKFDST2 FEKFENVF FEKFENVI FEKFENVP FEKFENVR
  FEKFENVS FEKFEPL  FEKFERRF FEKFGDGE FEKFICUL FEKFISPF FEKFIVP0
  FEKFIVPA FEKFIVPD FEKFIVPI FEKFIVPJ FEKFIVPT FEKFJESM FEKFJESU
  FEKFJLIC FEKFJSON 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 FEKFT006 FEKFT007 FEKFT008
  FEKFT009 FEKFT010 FEKFT011 FEKFT012 FEKFT013 FEKFT014 FEKFT015
  FEKFT016 FEKFT017 FEKFT018 FEKFT019 FEKFT020 FEKFT021 FEKFT022
  FEKFT023 FEKFT024 FEKFT025 FEKFT026 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  FEKLOCKA 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   HUHFCOR6 HUHFCORE
  

Fix information

• Fixed component name

  EXP FOR Z/OS HO

• Fixed component ID

  5655EXP23

Applicable component levels

• R320 PSY UI90162

     UP23/01/28 P F301

Fix is available

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