PI84885: EXCESSIVE FTP DEBUG TRACE MESSAGES NC0497 CONVERTMB

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• While FTPing a file using a multi byte character set
  (MBCS) and having an active FTP DEBUG trace for any options
  other than ACC or NONE the trace message
  NC0497 convertMB: ip inputbuffer isz inputbuffersize op
  outputbuffer osz outputbuffersize
  is generated.
  
  When many and or large files are transferred using MBCS this can
  result in an excessive amount of messages such that disk space
  to store the associated log messages may be depleted.
  
  The debug message NC0497 convertMB should not be generated for
  almost all FTP DEBUG trace options.
  

Local fix

• When FTPing a file using MBCS only enable FTP DEBUG trace
  options for a limited number of connections or a limited time.
  Disable FTP DEBUG tracing using option NONE.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users of the IBM Communications Server for z/OS Version  *
  * 2 Release 1 and 2: FTP                                       *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * When using MBCS encoding with any DEBUG trace (except ACC),  *
  * the ftp log is flooded with "NC0497 convertMB: ip            *
  * inputbuffer isz inputbuffersize op                           *
  * outputbuffer osz outputbuffersize" debug message.            *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply PTF.                                                   *
  ****************************************************************
  The problem can be summarized as follows -
  1. An FTP connection using MBCS encoding
  2. Enable any DEBUG trace option (other than ACC)
  3. Transfer a file
  4. The ftp log shows "NC0497 convertMB: ip inputbuffer isz
  inputbuffersize op outputbuffer osz outputbuffersize" debug
  message every time a piece of data is converted .
  The above message was of type error but was outside the error
  path. Enabling any DEBUG option (other than ACC), enables the
  error debug flag in FTP. Hence, this message was getting logged
  every time a piece of data was being converted whether there was
  an error or not.
  

Problem conclusion

• Changed the type of the DEBUG message from error to UTL.
  

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:

  UI49371 UI49373 UI49374

Modules/Macros

• EZAFTPNC
  

Fix information

• Fixed component name

  TCP/IP MVS

• Fixed component ID

  5655HAL00

Applicable component levels

• R210 PSY UI49371

     UP17/12/06 P F712

• R220 PSY UI49373

     UP17/12/06 P F712

• R230 PSY UI49374

     UP17/12/06 P F712

Fix is available

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