4.7.1. Useful Loggers

Below is a list of framework loggers that can be useful for application troubleshooting.


If set to DEBUG, the EclipseLink ORM framework logs all its SQL statements together with their execution time. The logger is already defined in the standard logback.xml, so you have to only change its level. For example:

    <logger name="eclipselink.sql" level="DEBUG"/>

Example of a log output:

2018-09-21 12:48:18.583 DEBUG [http-nio-8080-exec-5/app-core/admin] com.haulmont.cuba.core.app.RdbmsStore - loadList: metaClass=sec$User, view=com.haulmont.cuba.security.entity.User/user.browse, query=select u from sec$User u, max=50
2018-09-21 12:48:18.586 DEBUG [http-nio-8080-exec-5/app-core/admin] eclipselink.sql - <t 891235430, conn 1084868057> SELECT t1.ID AS a1, t1.ACTIVE AS a2, t1.CHANGE_PASSWORD_AT_LOGON AS a3, t1.CREATE_TS AS a4, t1.CREATED_BY AS a5, t1.DELETE_TS AS a6, t1.DELETED_BY AS a7, t1.EMAIL AS a8, t1.FIRST_NAME AS a9, t1.IP_MASK AS a10, t1.LANGUAGE_ AS a11, t1.LAST_NAME AS a12, t1.LOGIN AS a13, t1.LOGIN_LC AS a14, t1.MIDDLE_NAME AS a15, t1.NAME AS a16, t1.PASSWORD AS a17, t1.POSITION_ AS a18, t1.TIME_ZONE AS a19, t1.TIME_ZONE_AUTO AS a20, t1.UPDATE_TS AS a21, t1.UPDATED_BY AS a22, t1.VERSION AS a23, t1.GROUP_ID AS a24, t0.ID AS a25, t0.DELETE_TS AS a26, t0.DELETED_BY AS a27, t0.NAME AS a28, t0.VERSION AS a29 FROM SEC_USER t1 LEFT OUTER JOIN SEC_GROUP t0 ON (t0.ID = t1.GROUP_ID) WHERE (t1.DELETE_TS IS NULL) LIMIT ? OFFSET ?
        bind => [50, 0]
2018-09-21 12:48:18.587 DEBUG [http-nio-8080-exec-5/app-core/admin] eclipselink.sql - <t 891235430, conn 1084868057> [1 ms] spent

If set to TRACE, the framework logs application properties defined in files and coming from application components when the server starts, which can help in case of startup problems.

Note that you should also set an appropriate appender to TRACE, because usually appenders are set to a higher threshold. For example:

    <appender name="File" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
    <logger name="com.haulmont.cuba.core.sys.AbstractWebAppContextLoader" level="TRACE"/>

Example of a log output:

2018-09-21 12:38:59.525 TRACE [localhost-startStop-1] com.haulmont.cuba.core.sys.AbstractWebAppContextLoader - AppProperties of the 'core' block: