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From "Mamta A. Satoor (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-5051) Update the docs to include the additional information available in derby.log. This information will be useful from product supportability stand point
Date Fri, 18 Feb 2011 06:19:12 GMT
Update the docs to include the additional information available in derby.log. This information
will be useful from product supportability stand point
-----------------------------------------------------------------------------------------------------------------------------------------------------

                 Key: DERBY-5051
                 URL: https://issues.apache.org/jira/browse/DERBY-5051
             Project: Derby
          Issue Type: Improvement
          Components: Documentation
    Affects Versions: 10.8.0.0
            Reporter: Mamta A. Satoor


With DERBY-4853, we log additional information in derby.log to make it easier for the support
group to work with customer problems.

Following 2 additional properties will now always be put in derby.log (every time a database
is booted) 
user.dir 
derby.system.home 

user.dir is the system property which gives the user working directory. 

If the user has not specified derby,system.home, then Derby will look for optional derby.properties
file in user.dir . If user has provided derby.system.home, then the optional derby.properties
will be looked in derby.system.home rather than user.dir 

If user has not provided derby.system.home, then a sample of the 2 properties on derby.log
looks as follows on my machine 
user.dir=C:\p4clients\svnmain\client2\trunk\systest\out142 
derby.system.home=null 

If user has set derby.system.home to c:./temp, then a sample of the 2 properties on derby.log
looks as follows on my machine 
user.dir=C:\p4clients\svnmain\client2\trunk\systest\out142 
derby.system.home=c:/temp 

In addition to the above 2 properties, there can be following 3 optional properties in the
log (following the 2 properties mentioned above) 
derby.stream.error.file 
derby.stream.error.method 
derby.stream.error.field 

The above 3 properties provide a way to alter where error messages get logged rather than
tranditional derby.log file. In the absence of the above 3 optional properties, the location
of derby.log follows the same logic as derby.properties. But if the user has set any or all
of the 3 optional properties, then derby.log will not be in same location as derby.properties.
In the Derby code, derby.stream.error.file takes precedence over the other 2 properties and
derby.stream.error.method take precedence over the last property. 

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