It's a third party application generating huge amounts of log entries on our app server. Like this:
[03.03.10 15:21:57:250 CET] 00000180 FtpProtocolHa I org.slf4j.impl.JCLLoggerAdapter info Close connection : 10.227.10.10 - admin
[03.03.10 15:27:35:209 CET] 00000181 MinaFtpProtoc I org.slf4j.impl.JCLLoggerAdapter info [/10.227.10.10] CLOSED
++++
How do I turn this output from SLF4J off? I've looked in the .war file to find some configuration for SLF4J but nothing. Their website didn't help either.
slf4j is just a funnel to the actual log backend (here overriding jakarta commons logging), which is the one you must configure to get rid of a certain kind of messages. For logback this is the appropriate configuration snippet:
<!-- No Tomcat debug logs -->
<configuration>
...
<logger name="org.apache.catalina.core" level="OFF" />
...
</configuration>
For log4j it is very similar.
Alternatively, download http://www.slf4j.org/dist/slf4j-1.6.4.tar.gz, look in there for slf4j-nop-1.6.4.jar (this is the no-operation logger) and include this in your classpath. When the SLF4J classloader sees this (it looks to see what loggers are in the classpath that it can use), it should stop logging (once you've restarted the app).
At least this way you don't need to mess with the log configuration files...
slf4j is a logging facade for various logging frameworks. That output comes from the Apache Commons Loggin framework adapter, that turns to be another facade. Commons Logging Configuration.
Which logging back-end, e.g. logback, log4j, j.u.l., are you using? You need to configure the backend to filter those messages.
Moreover, the fact that the log messages point to "org.slf4j.impl.JCLLoggerAdapter" indicates that caller location inference is not working correctly. (It should mention the actual caller not JCLLoggerAdapter). This can happen if:
you are using an older version of SLF4J
or
the caller is using a slf4j-like wrapper or has its own homegrown logging API which does not infer caller location properly. See also a relevant SLF4J FAQ entry.
As stated by #sparkyspider answer, you can simply add the slf4j-nop library to your application.
If using Maven, add this to your pom.xml file:
<dependencies>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-nop</artifactId>
<version>1.7.36</version>
</dependency>
</dependencies>
If using Gradle, add this to your build.gradle[.kts] file:
dependencies {
implementation("org.slf4j:slf4j-nop:1.7.36")
}
Search for the following string: level="DEBUG" using your IDE.
You will find that text in a .xml file.
Go there and use level="INFO" instead of level="DEBUG".
The key value is not case-sensitive.
There can be something like:
<root level="info">
...
</root>
Related
I need to add to my logging.properties the line:
sun.net.www.protocol.http.HttpURLConnection.level = ALL
But this file is generated using log4j.xml, which is in xml format. And I'm not finding how to correctly format this property to xml to generate this line.
using log4j-1.2.8, JRE and JDK 1.8_181, Wildfly 10.1.0.Final
At first glance, you will not be able to configure the logging level for sun.net.www.protocol.http.HttpURLConnection using Log4j, no matter if you use properties or xml configuration files.
As you can see in the source code of the HttpURLConnection class, its logging is based in PlatformLogger, which in turn uses java.util.logging.
The PlatformLogger javadoc describes how it should be configured:
Platform logger provides an API for the JRE components to log
messages. This enables the runtime components to eliminate the
static dependency of the logging facility and also defers the
java.util.logging initialization until it is enabled.
In addition, the PlatformLogger API can be used if the logging
module does not exist.
If the logging facility is not enabled, the platform loggers
will output log messages per the default logging configuration
(see below). In this implementation, it does not log the
the stack frame information issuing the log message.
When the logging facility is enabled (at startup or runtime),
the java.util.logging.Logger will be created for each platform
logger and all log messages will be forwarded to the Logger
to handle.
Logging facility is "enabled" when one of the following
conditions is met:
a system property "java.util.logging.config.class" or
"java.util.logging.config.file" is set
java.util.logging.LogManager or java.util.logging.Logger
is referenced that will trigger the logging initialization.
Default logging configuration:
global logging level = INFO
handlers = java.util.logging.ConsoleHandler
java.util.logging.ConsoleHandler.level = INFO
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter
Basically, you need to configure the system property java.util.logging.config.file pointing to an appropriate properties file with the required properties:
handlers=java.util.logging.ConsoleHandler
java.util.logging.ConsoleHandler.level=INFO
sun.net.www.protocol.http.HttpURLConnection.level=ALL
Please, consider review this related SO question, it provides different examples and further information about how to do it.
As suggested in that question, you can use the system property javax.net.debug as well:
-Djavax.net.debug=all
If you want to integrate Log4j and java.util.logging, you can try using libraries like SLF4J and the corresponding bridges. This related SO question provides more information.
Remark: Since Log4j 1.2.8 is almost 20 years old, declared end-of-life 8 years ago and with several outstanding vulnerabilities, I don't believe you want to use it.
As you can see in jccampanero's answer, the HttpURLConnection class uses PlatformLogger for logging, which in Java 7 or 8 delegates all logging to java.util.logging.LogManager.
Several alternative implementations of java.util.logging.LogManager exist, but WildFly uses its own implementation called JBoss LogManager, which is the easiest to use. To modify your logging configuration, you just need to edit your server's configuration and add:
<subsystem xmlns="urn:jboss:domain:logging:3.0">
...
<logger category="sun.net.www.protocol.http.HttpURLConnection">
<level name="DEBUG"/>
</logger>
</subsystem>
(cf. documentation).
I want to use Log4J2 API, but I want all logs to be processed by java.util.logging (which will use Tomcat implementation). For example it's possible with SLF4J and slf4j-jdk14 library. Is it possible with Log4J2? I've found log4j-jul library, but it seems to work the other way: JUL API will be redirected to Log4J implementation.
I'm aware that it's possible to replace Tomcat logging subsystem with Log4J2, but it seems a fragile solution to me.
Why do you consider using Log4j 2 to handle the logging as fragile? Have you seen http://logging.apache.org/log4j/2.x/log4j-appserver/index.html?
No, Log4j does not provide a bridge to route logging to java.util.logging. You can route the Log4j 2 API to SLF4J and then route that to java.util.logging.
I am trying to view sql statements that go through my application's SQL Server JDBC connector. We are using mssql-jdbc. The app uses slf4j as the logging facade and the current implementation is Logback.
According to their documentation the JDBC driver uses Java Util logging. As such I have added the bridge for SLF4J to my pom.xml file as follows:
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jul-to-slf4j</artifactId>
</dependency>
I have also added an appender using the Microsoft documentation that looks like this:
<logger name="com.microsoft.sqlserver.jdbc.Statement" level="FINER" additivity="false">
<appender-ref ref="CONSOLE"/>
</logger>
However, no logging statements are ever seen. I have tried many different ways to configure the appender. Any help is appreciated.
NOTE: These SO questions answer the generic question of redirecting a java.util logging app to logback, but it is not working for this JDBC driver:
Send/redirect/route java.util.logging.Logger (JUL) to Logback using SLF4J?
How to make java.util.logging send logs to Logback?
I'm trying to disable request level logging by the AWS Java SDK with Tomcat 8 on Linux. It's a fresh installation of tomcat 8 and my test servlet (which works) just prints to standard out, which by default goes to /var/log/tomcat8/catalina.out.
I'd like to disable the request level logging like - Sending Request... by the AWS SDK, so I've tried adding the following to my logging config at /usr/share/tomcat8/conf/logging.properties:
log4j.logger.com.amazonaws = WARN
log4j.logger.org.apache.http.wire = WARN
log4j.logger.com.amazonaws.request = WARN
...like the docs say here, but it's still doing the verbose logging. My tomcat startup information shows that the logging.properties file is being used:
org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=/usr/share/tomcat8/conf/logging.properties
Is there anything else I need to do to?
If you are using Logback, instead of Log4J or Java14 logging, put the following in logback.xml:
<configuration>
...
<logger name="org.apache.http.wire" level="WARN"/>
<logger name="com.amazonaws" level="WARN"/>
...
To specify an external logback.xml and using Spring Boot
-Dlogging.config="C:\logback\logback.xml"
or if you are not
-Dlogback.configurationFile=file:///C:/logback/logback.xml
Logback configuration via jvm argument
I had the same issue, none of the above helped actually.
Creating a logback.xml and putting it on classpath with below config fixed it:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<logger name="org.apache" level="ERROR" />
<logger name="httpclient" level="ERROR" />
</configuration>
Hope it helps the others.
"logging.properties" is the configuration file for Java Util Logging (JUL), witch is a different framework then Log4J. You can try to create a Log4J config file "log4j.properties" in the root of your classpath and insert the code from above: "log4j.logger.com.amazonaws = WARN" .
By Mark
Perhaps I should have been clearer: log4j is not required to control logging in the SDK. The SDK uses Apache Commons Logging, which is, as I already mentioned, an industry standard. Commons Logging is just a dispatch layer to an underlying logging implementation, so that customers can plug in any compliant logging framework and have it work. I used log4j in my examples because it's the one most commonly used, and therefore the most likely to be helpful in this public forum.
If your logging system works with Commons Logging, then you already know how to configure it. If it doesn't, then feel free to turn off Commons Logging altogether by passing the appropriate command-line argument to your JVM, as in my above response. If for some reason you can't change the java command line for your application, then you can use the following snippet in a Main class, to the same effect:
static {
System.setProperty("org.apache.commons.logging.Log",
"org.apache.commons.logging.impl.NoOpLog");
}
Again, to be absolutely clear: the SDK doesn't need log4j. Unfortunately, because all the underlying log implementations are configured differently, this means that we can't tell you exactly how to configure the logging unless we know which implementation your application uses. For that reason, we often use log4j syntax in our examples.
For more information about how Apache Commons Logging works and how to configure it, please read:
http://commons.apache.org/logging/guide.html
im new to webservices.i ran a sample webservice(Jboss5.0.1,jdk 6) from java client. i got this warning. but application runs properly.when i searched about this warning i came to know that we dont need to worry about this. but is there any way to hide this from log?
[StatelessBeanContext] EJBTHREE-1337: do not get WebServiceContext property from stateless bean context, it should already have been injected
Thanks in advance.
http://idevone.wordpress.com/2009/09/14/howto-suppress-ejbthree-1337-warning/:
The problem however is that the
warning clutters the log file and
makes debugging harder than needed. It
is easy to suppress it though and I
will show you how.
First, locate jboss-log4j.xml file which should be found under
${JBOSS_HOME}/server/default/conf. If you are using a runtime
configuration other than default, locate the file under configuration
that you actually use. This file is used to configure logging output
of the JBoss.
Inside the file search for “Limit categories” – you should find a list
of definitions. Edit it to look something like this:
<!-- ================ -->
<!-- Limit categories -->
<!-- ================ -->
<!-- Suppress EJBTHREE-1337 warning -->
<category name="org.jboss.ejb3.stateless.StatelessBeanContext">
<priority value="ERROR"/>
</category>
You are basically telling JBoss to suppress any WARN or lower messages
from the class that generates those warnings. Now just restart JBoss
and the warning should disappear.