PM64118: ZFILE.EXISTS THROWS ZFILEEXCEPTION FOR A NONEXISTENT PDS DATASET NAME AND MEMBER INSTEAD OF RETURNING FALSE

APAR status

• Closed as program error.

Error description

• Error Message: Using JzOS build version 2.4.0 or later (shipped
  with Java 6.0.1 and Java 7), class ZFile method exists throws
  ZFileException
  For example:
  Exception in thread "main" com.ibm.jzos.ZFileException:
  //'A.B.C': fopen() failed;
  EDC5049I The specified file name could not be located.
  ; errno=49 errno2=0xc00b0641 last_op=50 errorCode=0x21708
  at com.ibm.jzos.ZFile.fopen(Native Method)
  at com.ibm.jzos.ZFile.doZFileOpen(ZFile.java:601)
  at com.ibm.jzos.ZFile.<init>(ZFile.java:464)
  at com.ibm.jzos.PdsDirectory.<init>(PdsDirectory.java:72)
  at com.ibm.jzos.ZFile.dsExists(ZFile.java:214)
  at com.ibm.jzos.ZFile.exists(ZFile.java:276)
  at JzOSTest.main(JzOSTest.java:7)
  .
  Stack Trace: EDC5049I The specified file name could not be
  located.
  ; errno=49 errno2=0xc00b0641 last_op=50 errorCode=0x21708
  at com.ibm.jzos.ZFile.fopen(Native Method)
  at com.ibm.jzos.ZFile.doZFileOpen(ZFile.java:601)
  at com.ibm.jzos.ZFile.<init>(ZFile.java:464)
  at com.ibm.jzos.PdsDirectory.<init>(PdsDirectory.java:72)
  at com.ibm.jzos.ZFile.dsExists(ZFile.java:214)
  at com.ibm.jzos.ZFile.exists(ZFile.java:276)
  at JzOSTest.main(JzOSTest.java:7)
  .
  

Local fix

Problem summary

• The problem is caused when calling ZFile.exists() on a PDS
  member with a nonexistent PDS and member name.
  

Problem conclusion

• This defect will be fixed in:
  7.0.0 SR3 (z/OS 31-bit)
  .
  JZOS is updated such that calling ZFile.exists() on a PDS member
  with a nonexistent PDS and member name will return false,
  instead of throwing a ZFileException.
  

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

  JAVA Z/OS 31

• Fixed component ID

  620700105

Applicable component levels

• R700 PSY

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