Specifies which errors are logged to the Derby error log (typically the derby.log file). In test environments, use the setting derby.stream.error.logSeverityLevel=0 so that all problems are reported.
Errors that cause the statement to be rolled back, for example syntax errors and constraint violations.
Errors that cause the transaction to be rolled back, for example deadlocks.
Errors that cause the connection to be closed.
Errors that shut down the Derby system.
// send errors of level 30000 and higher to the log derby.stream.error.logSeverityLevel=30000
This property is static; if you change it while Derby is running, the change does not take effect until you reboot.