Is there a way to disable Spring boot logs and print only the logs which i give in the program using logger.info or logger.debug statements. I mean i want only the log statements which i had given in the program to be logged and nothing else. I use the default logging system given by spring boot. If required i can change to log4j or log4j2 as well. Using spring-boot version 1.2.7.
In other way, putting forward , like logging.level.org.springframework can be used to log spring related logs ,is there a way like logging.level.applicationlevel to get application(Java logger statement) logs alone
You can configure your logging in your application.properties like below:
logging.level.com.myapp.packagename=INFO
logging.level.org.springframework=ERROR
INFO means it will print logging of classes in your package and all sub package at INFO/ERROR/WARN level, while for spring related classes only print if there are ERROR level logging.
You can configure logging properties as follows:
logging.level.* = ERROR
logging.level.package_name=DEBUG
Example:
logging.level.com.example.controller=DEBUG
So classes under com.example.controller package will be logged, others only on error will be logged.
I hope this helped!!
Related
I am running a spring boot application. for logging purpose we have used spring logback.
there is spring-logback.xml file where we define log level more likely at package level.
is there a way to group logger (may be at feature level) and package names are not same as feature name , which can have common configuration. more like instead of changing each class log level of feature . changing log level at feature which changes log level of all linked/grouped loggers.
Spring support grouping in configuration properties rather than in logback-spring.xml
for more info
https://docs.spring.io/spring-boot/docs/2.1.1.RELEASE/reference/html/boot-features-logging.html#boot-features-custom-log-groups
I add hibernate-validator(6.0.9.Final) to my spring (not spring boot) maven project and work perfectly, but cause lot of(~3000 row) DEBUG log. How to off this log?
I tried these, but didn't work:
logging.level.org.hibernate=info
log4j.logger.org.hibernate=info
The log level of Hibernate Validator is (obviously) not DEBUG by default so you must have something in your application classpath setting the log level to DEBUG.
Hibernate Validator is using JBoss Logging which uses log4j under the hood so log4j.logger.org.hibernate.validator=info in your log4j.properties should work.
But considering it shouldn't have been set to DEBUG in the first place, I'm wondering if you have something in your classpath overriding your log configuration.
I suspect either you or a dependency have enabled DEBUG logging for org.hibernate to see the queries or something similar and this is this setting you should find and remove.
Set the log4j properties as
log4j.logger.org.hibernate.validator=info
also set the show_sql =false to avoid the query printing on the console.
I am building an application (Spring Boot 1.4.2) where i would like to offer an administrator the option to enable syslog but i want to avoid him/her having to manually edit any config files - in this case logstash-spring.xml.
Therefore i am trying to understand how i can achieve using a logback-spring.xml file as a baseline (e.g. define file based log options, levels etc. - settings i dont want the administrator to change) and on top of that provide a functionality at runtime where an administrator can add or change a syslog appender.
I have listed what i see as requirements:
The changes made to the Logger should be persisted after the Spring Boot application is restarted.
Ideally the syslog server info (name, port) are kept in my persistence layer (H2, hibernate) but i am not sure if that is possible as i guess the logging framework is being injected prior to my persistence layer?
The syslog appender that i want to add should be referenced by root logger so that all the packages i have configured logging for would go to syslog (not sure if this is just "how it works per default")
Also i dont know if i could simply treat logback-spring.xml as a regular XML object and use for example JAXB to manipulate that file and use the autoscan feature of Logback to simply read in the new changes?
I have played around with defining a Logger #Bean:
#Bean
public Logger logger() {
LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
// excluded implementation
}
This is being picked up by Spring Boot but that brings me to the 2 items i have listed above that i dont know how or where i would store the syslog server information the administrator would provide.
UPDATE:
I wrote the following which meets the 3 requirements above however i would appreciate any feedback on the actual implementation as i am very new to Spring and Java.
GitHub repository with implementation - spring-boot-logback-syslog
I managed to use the example i posted in my Github repo in my designated application and with that i am answering my own questions based on the implementation in that repo.
Please refer to the README for full details on how it was implemented.
UPDATE: As part of Spring Boot 1.5.1 there is an actuator that can set the logging level during runtime: Production Ready Loggers
Not necessarily 100% related to this topic but this was one of the requirements i had for the implementation as well as changing syslog related settings.
I have a Spring boot application which use logback.xml for logging configurations.I am looking for options to dynamically change log level.
For instance if I have deployed an app with loglevel as ERROR,Let say I want to change this to INFO but I don't want to redeploy/restart my JVM.
Is there any possibility we can configure logback.xml like config server to achieve this
You can configure Logback to Automatically reloading configuration file upon modification
Yes, this is quite possible. Expose a rest endpoint where you supply the className and log level. With slf4j you can get the LoggerContext and change the level.
LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
context.getLogger(className).setLevel(Level.valueOf(level));
Apache Commons logging and others have similar features.
If you are using spring cloud then you can have this in your yml file
logging:
level:
root: INFO
Then you can change it and refresh the configuration using actuator refresh to fetch new configuration changes no need to restart the service.
Also if you need some sort of UI to do this stuff you can explore the Spring-cloud-dashboard It is pretty cool and uses the features from the actuator to do and show you a lot of stuff not only changing log levels.
I'm confused as to how the errors are logged without me implicitly catching them and logging out the error. All that I've done is put a log4j.xml file in my project defining appenders and now the logs catch and log everything from the frameworks.
If I say, try to query in Hibernate and the query fails, or I try to open a file that doesn't exist, or I get a null pointer exception, if the log4j.xml file defines a log file, and the error level is set correctly, then the error will be captured there?
How does my spring web app capture errors that I didn't catch and log? Is this a result of apache commons logging?
Or is this some magic that log4j knows how to deal with - catch stream to the console etc?
Any info appreciated.
From spring official documentation:
The nice thing about commons-logging is that you don't need anything else to make your application work. It has a runtime discovery algorithm that looks for other logging frameworks in well known places on the classpath and uses one that it thinks is appropriate (or you can tell it which one if you need to). If nothing else is available you get pretty nice looking logs just from the JDK (java.util.logging or JUL for short). You should find that your Spring application works and logs happily to the console out of the box in most situations, and that's important.
To make Log4j work with the default JCL dependency (commons-logging)
all you need to do is put Log4j on the classpath, and provide it with
a configuration file (log4j.properties or log4j.xml in the root of the
classpath).
Take a look for a complete explanation: http://static.springsource.org/spring/docs/3.0.x/reference/overview.html#d0e743