I am using Logback in my application hosted on Websphere App Server. Logback is configured to log to System Out (and others are hesitant to change to a different file). The issue is that Websphere uses its own format for logging to System Out. Executing logger.debug("test") in my app yields:
[8/7/12 12:27:55:629 CDT] 0000003a SystemOut O DEBUG com.myapp... test
where everything up to the "O" is added by Websphere. The rest is from Logback
I have set up Logback to use the following pattern: %-5level %logger{36} - %msg%n so that I don't repeat timestamp and thread info which Websphere does on its own, but I am still annoyed that I can't fully customize the logging to System Out from within Logback.
I don't know a whole lot about logging best practices. Before, I have logged to separate files by web app, but for this project, I was told the System Out files are monitored by a third party and I should not change from using System Out. Is there any way to get around my issue given these requirements and tell Websphere not to mess with my System Out logging, or is the only solution to start logging to a different file? Thanks!
Your logback is configured to write messages to System.out. However, everything that is written to System.out is redirected by WebSphere and written to the SystemOut.log file with the same format as log messages produced by WebSphere, but with a severity indicator "O". It is not possible to change that.
Note that it is likely that the people who told you to use SystemOut.log actually meant that you should ensure that logging is done using WebSphere's log system so that messages are written with the correct category and severity and that log levels can be changed at runtime. Since WebSphere's log system is build on java.util.logging you should probably just replace logback by slf4j-jdk14 to satisfy their requirement.
I don't think you're going to be able to change the format. And if you could, it might break the current monitoring anyway.
I wonder if anyone would mind if you log to two loggers at the same time, SystemOut for the existing monitoring, and your own for a more readable format.
The problem is that Logback redirects the messages to console output instead of java.util.logging. Console output has no log levels and that's why WebSphere just writes "O".
We solved this by implementing a Logback appender that redirects logs to JUL (java.util.logging) instead. We convert Logback log levels to JUL levels (e.g. Logback "ERROR" is JUL "SEVERE").
We also wanted to use Websphere's trace options. If trace is enabled for a class/package pattern, you will see Logback DEBUG and TRACE messages in Websphere's trace.log. You can also check if the trace is enabled by calling Logback's isDebugEnabled() / isTraceEnabled().
See this answer with a full implementation:
https://stackoverflow.com/a/74386323/395879
Related
I'm using Sentry to log errors that occur in my code and every time I launch my application I see that Sentry logs information like
[main] INFO io.sentry.DefaultSentryClientFactory - Using an HTTPS connection to Sentry.
Is it possible to suppress this kind of logs?
I don't know which logging framework you are using but each of them offers a way to change the threshold for a specific package (or class), so you could just disable or raise it for io.sentry.DefaultSentryClientFactory. For example, here's one for log4j: https://stackoverflow.com/a/4973082/11958
PS: I work on sentry-java and I think those shouldn't be at the INFO level, honestly. I'll change that in a future release.
Following are the requirements,
multiple modules deployed on JBoss AS 7 with individual logging configuration using logback.xml.
all of them request exclusion of default logging-service provided by the Server, using jboss-deployment-structure.xml.
Following are observation,
log.debug statements get printed as INFO on Server log(server.log)
it's because root level of custom-logger(logback.xml) is set to DEBUG
Now questions,
How can I make, DEBUG statements generated by custom logging statement gets printed with appropriate log level?
Conversely, is it possible to get log level of Server without using it's logging service?
In other words, is it possible to achieve uniform log-level configuration across multiple modules that use custom-loggers?
I'm trying to essentially configure logging in three places, independently. Ideally, each component that is logging is fully unaware of the others. I'd like to use logback for this, as it seems to have some decent features and performance.
Here are the places from which I would like to log from and to:
Tomcat (7) should log to ${catalina_home}/logs/catalina.out, and should only log Tomcat events (deployments, server startup, etc)
A web application hosted in Tomcat should log to ${catalina_home}/logs/application.log, and should only log application things, like results of request validations or errors
A library that is included in the web application should log to ${catalina_home}/logs/library.log, and should only log things specific to that library, like time it takes to interact with some other web-service or library-specific errors
I know this is probably not the way it would work, but I would think I need to have a logback.xml file for each concern. Actually, I have created them and added to the classpath such that I get a "logback.xml occurs multiple times on the classpath" error.
I can see why I would need to consolidat my application and my library logback configuration to a single logback.xml file, but how would I keep the container logging config separate from the application+library logging config? Adding a logback config file to my application, as well as logback enabling Tomcat as described here, still yields a "multiple logback.xml" error. And, Chapter 9 of the logback user manual, which talks about separation of logging, doesn't really show how to separate the container and applications (just multiple applications), unless I am missing something there.
I'm running into a weird problem. I have a class that used to use Log4j, and I could do something like:
LOGGER.log(Level.SEVERE, "This is a message");
And I'd get output like this:
SEVERE: This is a message
I replaced it with an SLF4J logger for consistency with the rest of the application:
LOGGER.error("This is a message.");
But now it's logging at INFO level:
INFO: 2012-01-23 16:50:43,306 [http-thread-pool-8080(3)] ERROR com.mycompany.MyClass - This is a message
I was expecting this to be logged at ERROR level (SLF4J doesn't seem to have any levels above that).
Any idea what's going on? Is this the default? The application is fairly complicated, so I wouldn't be surprised if this was changed somewhere, but where would I find that to change it back?
I'm using Glassfish, in case that might be related.
you need to make your SLF4J use the Java Util Logging backend. That's what Glassfish uses internally. Since it's not using that, it's dumping to the console, and GF reports everything on the console as INFO.
So hook up the JUL adapter and you should be all good.
without configuration listing for logging it's only a guess. but I think the logging framework is probably misconfigured. slf4j logs at ERROR level:
ERROR com.mycompany.MyClass - This is a message
then this output is sent into console, which is redirected into general log file at INFO level by glassfish.
previous setup probably used glassfish logging directly inheriting its configuration. after switching to slf4j no config was found so everything is sent to console and then to server.log
I have a server I made in Java that needs to use a database, I chose HSQLDB.
So I have a lot of entries in my server like:
Logger.getLogger(getClass().getName()). severe or info ("Some important information");
When I run my server it goes to System.out which I think its the default configuration of java.util.logging?, so far its ok for me, and later I will make it go to a file ...
But, the problem is, when I start hsqldb it messes up with the default configuration and I can´t read my log entries on System.out anymore..
I already tried to change hsqldb.log_data=false, but it still messes up the default configuration.
Can someone help me??
I dont want to log hsqldb events, just my server ones.
Thanks
This issue was reported and fixed in the latest version 2.2.0 released today.
Basically, you set a system property hsqldb.reconfig_logging to the
string value false.
A system property is normally set with the -D option in the Java startup command for your application:
java -Dhsqldb.reconfig_logging=false ....
See below for details of the change:
http://sourceforge.net/tracker/?func=detail&aid=3195462&group_id=23316&atid=378131
In addition, when you use a fremework logger for your application, you should configure it directly to choose which levels of log to accept and which ones to ignore.
The hsqldb.applog setting does not affect framework logging and only controls the file log.
The hsqldb.log_data=false is for turning off internal data change logging and should not be used for normal databases. Its usage for bulk imports is explained in the Guide.
Try setting hsqldb.applog to 0, that shuts off application logging to the *.app.log file.
Start your server with a property pointing to the location of a dedicated properties file:
-Djava.util.logging.config.file=/location/of/your/hsqldblog.properties"
Which contains the following line to change Java logging for Hsqldb.
# Change hsqldb logging level
org.hsqldb.persist = WARNING
Side note, you can choose from the following levels:
SEVERE WARNING INFO CONFIG FINE FINER FINEST