The first failure data capture (FFDC) log file saves information that is generated from a processing failure. These files are deleted after a maximum number of days has passed. The captured data is saved in a log file for analyzing the problem.
The first failure data capture (FFDC) feature
preserves the information that is generated from a processing failure and
returns control to the affected engines. The captured data is saved in a log
file for analyzing the problem. FFDC is intended primarily for use by IBM
Service. FFDC instantly collects events and errors that occur during the WebSphere
Application Server runtime. The information is captured as it occurs and is
written to a log file that can be analyzed by an IBM Service representative.
The first failure data capture (FFDC) feature preserves the
information that is generated from a processing failure and returns control
to the affected engines. The captured data is saved in a log file for analyzing
the problem. FFDC is intended primarily for use by IBM Service. FFDC instantly
collects events and errors that occur during the WebSphere Application Server
runtime. The information is captured as it occurs and is written to a log
file that can be analyzed by an IBM Service representative. The data is uniquely
identified for the servant region that produced the exception.
FFDC is intended primarily for use by IBM Service. FFDC instantly
collects events and errors that occur during the WebSphere Application Server
runtime. The information is captured as it occurs and is written to a log
file that can be analyzed by an IBM Service representative. The data is uniquely
identified for the servant region that produced the exception.
The log file purges in seven days by default. You can configure
the amount of days between purges if you are concerned about the amount of
disk space used by the FFDC log files.
The FFDC configuration properties files are located in the properties directory under the Application Server product installation. You must set the ExceptionFileMaximumAge property to the same value in all three files: ffdcRun.properties, ffdcStart.properties, and ffdcStop.properties. You can set the ExceptionFileMaximumAge property to configure the amount of days between purging the FFDC log files. The value of the ExceptionFileMaximumAge property must be a positive number. The FFDC feature does not affect the performance of the Application Server product.
The FFDC file management function removes
the FFDC log files that have reached the maximum age and generates a message
in the SystemOut.log file.
The FFDC
file management function removes the FFDC log files that have reached the
maximum age and generates a message in the SYSOUT of the server job log.
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