IJ41552: OUTPUT REDIRECTION TO MVS DATASETS FAILS ON Z/OS

APAR status

• Closed as program error.

Error description

• Error Message: Output written to STDOUT/STDERR file descriptors
  when redirected to an MVS dataset are not written to the target
  dataset.
  .
  Stack Trace: n/a
  .
  Redirecting STDOUT/STDERR to an MVS dataset only works when
  output is written to the files using FILE* pointers. POSIX
  write() calls to the redirected STDOUT/STDERR file descriptors
  will not be cause bytes to be written to target dataset. This is
  z/OS Unix System Services limitation.
  

Local fix

• There is no known workaround with Java.
  

Problem summary

• The file stream support in LE abstracts to either an underlying
  Unix file (fd) or data set (DCB). If the STDOUT/STDERR streams
  are redirected to an MVS dataset, POSIX write() calls to the
  STDOUT/STDERR file descriptors will not be written to target
  dataset. This is a z/OS Unix System Services specific problem.
  

Problem conclusion

• Amend codebase to include additional support for writing using
  FILE* pointers in place of file descriptors. This feature is
  enabled when the system property
  -Dcom.ibm.writeToStandardOutputsUsingStreams=true is used.
  .
  This APAR will be fixed in the following Releases:
  .
  IBM Semeru Runtime Certified Edition
   11 11.0.16.0
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  maintenance can be found at:
   https://www.ibm.com/support/pages/java-sdk
  

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:

Fix information

• Fixed component name

  OPENJDK CLASS L

• Fixed component ID

  621800100

Applicable component levels