log4j

问题 I inherited a JBOSS 4.2.3.GA . ear project in which everything loads and runs fine if I build it with JDK 7u45, but fails to load & run early in the JBoss Bootstrap if I build it with any newer update of JDK 7 (e.g. 7u76, 7u79, 7u80). The JBOSS server itself runs on Java 1.7.0_45. The logged reason for the failure is a ClassNofFoundException for a class that is actually there (even for the failing .ear): log4j:ERROR Could not create the Layout. Reported error follows. java.lang

问题 I have seen a log once that looked like this. Not sure what logging framework generated it. 12:34:56 INFO blah ... previous line repeated 23 times 11:22:33 DEBUG blah Can this be done with log4j2? 回答1: The current version, Log4j 2.6.2, does not have this capability. I'm not sure how easy it would be to implement this, but I would definitely recommend that you raise a feature request for this on the Log4j 2 issue tracker. A similar request may already exist to suppress repeated stack traces,

问题 So I've been porting some of our services to use Logback over log4j and I've been using the log4j-over-slf4j jar to spoof log4j for our legacy dependencies. The only issue is log4j-over-slf4j doesn't implement many of the classes of log4j so I'm seeing a decent few class not found exceptions from dependent jars. How have people got around this? Is it enough to just put the nlog4j in your classpath instead of the log4j-over-slf4j jar? I haven't tested this last idea yet but I'm planning on it

问题 I have a java app running on elastic beanstalk, with the log rotation to S3 set up and working fine. However, I find that my catalina.out log file only exists for up to 15 minutes before rolling to a new file, which makes debugging problems on the same day more tedious (get gz from s3 and unzip, instead of just ssh-ing and reading the log file). Is there any way to configure this through tomcat/log4j or the elastic-beanstalk console? I believe it's an AWS thing, because we had the same app

问题 I'm trying to customize logging coming from com.datastax.driver for Cassandra and Apache Spark. These libraries output debug logs to console, and I would like to change it to error level. I tried to use log4j with .properties and .xml configuration and slf4j with .xml configuration. However, I could not override configuration from these libraries. I found many discussions and I tried everything many different options. My configuration looks like: log4j.xml <?xml version="1.0" encoding="UTF-8"

问题 There are many variations of logging that can be used in java. Most popular are the log4j and JDK logging. I am wondering what logging is used by JBoss Application Server 7.2 version by default? It is very hard to find the logger used by looking at the modules or configuartion files. I would aprreciate if somebody can help me in this regard. Thank you 回答1: Generally speaking, logging should be broken into two parts. A logging facade and a log manager. J.U.L. and log4j don't separate these

问题 I'm not sure if this is a follow-up or separate question to this one. There is some piece about LogStash that is not clicking. For that, I apologize for a related question. Still, I'm going out of my mind here. I have an app that writes logs to a file. Each log entry is a JSON object. An example of my .json file looks like the following: { "logger":"com.myApp.ClassName", "timestamp":"1456976539634", "level":"ERROR", "thread":"pool-3-thread-19", "message":"Danger. There was an error",

问题 I am trying to configure log4j for logging to database using JDBCAppender by referring to the below link. http://logging.apache.org/log4j/2.x/manual/appenders.html#JDBCAppender However I am getting the error "type GenericObjectPool does not take parameters". could some one please help me rectify this error? log4j2.xml <?xml version="1.0" encoding="UTF-8"?> <Configuration status="error"> <Appenders> <JDBC name="databaseAppender" tableName="LOGGING.APPLICATION_LOG"> <ConnectionFactory class=

问题 How do I implement log4j in a multi-module Maven project? Do I add a "log4j.properties" file to the src/main/resources directory of every submodule? If so, do I have to specify a different output file for each file appender? Or is there a way to have one overarching log4j.properties file for the whole project, without having a configuration nightmare. Which approach (many log4j.properties files versus one) is more common and better practice? Thanks for all feedback in advance. 回答1: It depends

问题 im already set the build path for log4j12-api-beta2.jar but it gives the following error please help me to solve this problem my code is follows java file: package com.sst.log4j; class Product { private int productId; private String productName; public int getProductId() { return productId; } public void setProductId(int productId) { this.productId = productId; } public String getProductName() { return productName; } public void setProductName(String productName) { this.productName =