# derby.stream.error.field

#### Function

Specifies a static field that references a stream to which the error log is written. The field is specified using the fully qualified name of the class, then a dot (.) and then the field name. The field must be public and static. Its type can be either java.io.OutputStream or java.io.Writer.

The field is accessed once at Derby boot time, and the value is used until Derby is rebooted. If the field is null, the error stream defaults to the system error stream (java.lang.System.err).

If the field does not exist or is inaccessible, the error stream defaults to the system error stream. Derby will not call the close() method of the object obtained from the field.

#### Default

None.

#### Example

    derby.stream.error.field=java.lang.System.err

#### Scope

system-wide

#### Dynamic or static

This property is static; if you change it while Derby is running, the change does not take effect until you reboot.

Parent topic: Derby properties
Related reference
derby.authentication.builtin.algorithm
derby.authentication.ldap.searchAuthDN
derby.authentication.ldap.searchAuthPW
derby.authentication.ldap.searchBase
derby.authentication.ldap.searchFilter
derby.authentication.provider
derby.authentication.server
derby.connection.requireAuthentication
derby.database.defaultConnectionMode
derby.database.forceDatabaseLock
derby.database.fullAccessUsers
derby.database.noAutoBoot
derby.database.propertiesOnly
derby.database.readOnlyAccessUsers
derby.database.sqlAuthorization
derby.infolog.append
derby.jdbc.xaTransactionTimeout
derby.language.logQueryPlan
derby.language.logStatementText
derby.locks.deadlockTimeout
derby.locks.deadlockTrace
derby.locks.escalationThreshold
derby.locks.monitor
derby.locks.waitTimeout
derby.replication.logBufferSize
derby.replication.maxLogShippingInterval
derby.replication.minLogShippingInterval
derby.replication.verbose
derby.storage.initialPages
derby.storage.minimumRecordSize
derby.storage.pageCacheSize
derby.storage.pageReservedSpace
derby.storage.pageSize
derby.storage.rowLocking
derby.storage.tempDirectory
derby.stream.error.file
derby.stream.error.method
derby.stream.error.logSeverityLevel
derby.system.bootAll
derby.system.durability
derby.system.home
derby.user.UserName