For a spring-boot application I’m trying to set up a log4j2 logger that will write the logs into a few sperate files, but the logs are only written to the console, I’ve checked my user_dir to make sure I’m not looking in the wrong location as well. This is the code that should write the test…
Tag: log4j2
reduce the internal log level for Log4j2 (with Kafka Appender)
I’m using Log4j2 (v2.17.2) to send information directly to kafka, and am using XML to create the configuration (as many articles mention that XML can handle a lot more configuration options – properties do not). The issue that I have is that my console is filled to the brim with irrelevant INFO lo…
Unable to send the logs to Splunk Enterprise local using log4j2
I’m using log4j2 and splunk within java to send logs into my Splunk Enterprise HEC (HTTP Event Collector) Splunk Enterprise is running in my local machine. I’m doing all log4j2 configuration programmatically. (I know this is not the correct way to do this but I’m still doing this for learnin…
create a custom log4j2 rolling file appender
I want to create a custom log4j2 rolling file appender. I need to create this custom appender because I want to wrap the file name with current thread name. We are trying to migrate log4j 1.x to recent log4j2 version and previously we had used DailyRollingFileAppender to log all activities of our application.…
Why are log4j classes loaded by two class loaders?
I have a maven project for an application, which I run in a WildFly server. The project has log4j dependencies: I would like to get the LoggerContext like this: However, this results in ClassCastException: After some debugging, I have discovered that the problem is that the class LoggerContext is loaded via t…
How to set log4j 2.x output path after reading in log4j.xml
Say I have an appender defined in the log4j.xml file below. How could I change the value “/home/logs/oarm_log.txt” to a different value that comes from a string found in the actual Java code so that the code determines where to output the .txt file? Answer Though your best go-to resource for this …
Detecting Apache Log4j vulnerability presence in gradle transitive dependencies
There is a recent vulnerability in log4j https://nvd.nist.gov/vuln/detail/CVE-2021-44228 which has criticality score of 10 How to check the presence of Log4j vulnerable versions in gradle so that it would list all the dependencies including the transitive dependencies? Answer We can use To list the dependency…
Log4j vulnerability – Is Log4j 1.2.17 vulnerable (was unable to find any JNDI code in source)?
With regard to the Log4j JNDI remote code execution vulnerability that has been identified CVE-2021-44228 – (also see references) – I wondered if Log4j-v1.2 is also impacted, but the closest I got from source code review is the JMS-Appender. The question is, while the posts on the Internet indicat…
Can I skip/omit a log4j2 configurationFile that doesn’t exist to fall back to an existing one?
I am running log4j2 logging in a java application with not the most flexibility in setup. We have an existing log4j2.xml configuration file in the classpath of our application that exists within an executable jar. I can modify the jar but not what calls it or is outside of it (I don’t control the enviro…
LOG4J2 RollingFile Appender not writing to file
I’m trying to configure log4j2 by code but my RollingFile and my custom plugin”JTxtLogAppender” not working. The problem with the RollingFile is that the log file is created but it not writing to the file, neither to my custom plugin, but output to console is working. Here my code: Answer Be…