log4j

问题 I have a Maven GWT project. I included Hibernate and HSQLDB as persistence layer. Running the unit tests is fine, but when it try to run the server component, logging does not work and so I am blind to the errors on the server side. The errors I encouter are: [ERROR] log4j:ERROR A "org.apache.log4j.RollingFileAppender" object is not assig nable to a "org.apache.log4j.Appender" variable. [ERROR] log4j:ERROR The class "org.apache.log4j.Appender" was loaded by [ERROR] log4j:ERROR [sun.misc

问题 I'm just working on an application where I gotta maintain logs based on size, and I have done so as below code snippet, what I was expecting was after every 10MB, a new log roller say Mylog.1.log, Mylog.2.log and so on will be created, unfortunately its not happening. Though it creates Mylog.1.log, post that its removing Mylog.1.log and creating Mylog.2.log, this is not expected behaviour. <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd"> <log4j

问题 I have the following maven dependency in my pom file: <!-- depends on slf4j-api, log4j --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.6.4</version> </dependency> When I deploy the project into tomcat, I am getting the error message: SEVERE: Exception sending context destroyed event to listener instance of class org.springframework.web.context.ContextLoaderListener java.lang.ExceptionInInitializerError at org.springframework.web.context

问题 I'm currently submitting Storm topologies programatically via my Java application by using the following command: Nimbus.Client client = NimbusClient.getConfiguredClient(stormConfigProvider.getStormConfig()).getClient(); client.submitTopology( this.topologyID.toString(), stormJarManager.getRemoteJarLocation(), JSONValue.toJSONString(stormConfigProvider.getStormConfig()), topology ); In my scenario, I have two kinds of topologies. Testing topologies and production topologies. For both kind of

问题 I have many log files and I have a few log4j configurations (different ConversionPattern formats for file appenders). I would like to write a script/test which is able to group log files by a ConversionPattern which was used to write a file. The bit I'm missing is how to implement something like: boolean logToPatternMatcher.matches(String conversionPattern, String logFileEntry) Is it possible with Log4j API? The above method should return true for a given: String conversionPattern = "%d

问题 I am using SLF4J with Log4J for logging. So far I am using the log4j configuration from xml file. How I can turn on/off logging at runtime. e.g. a web service turns on/off logs, so I will not have too much logs and will enable only for debugging purpose. Thanks. 回答1: log4j logger levels can be changed at runtime. Change the log4j logging level to error, so that all the debug and info statements will no be logged. If the application is restarted the logger level will be changed to the one

问题 In a grails application I want to decorate each logs with custom data. The current need is simply to prepends the current user name to the log message I've some idea about how to resolve this issue: - Adding custom field to log4j patternLayout - Using groovy's meta-class facilities to intercept each log call and modify the message content I just want to have something easy to understand and to maintain: this is a very low priority feature so I don't want spending too much time messing around

问题 How can I configure Solr logs to get sent to Azure Application Insights? I see can use a Log4J appender. https://docs.microsoft.com/en-us/azure/application-insights/app-insights-java-trace-logs Solr is an open source project, and I don't compile it myself, I just use the distribution. How can I drop in Application Insights/Log4J appender, without recompiling having installed the SDK? I just want to configure the logs to get sent to application insghts, for effectively a 3rd party application.

问题 I was trying to find out how to use JMSQueueAppender but there were no proper instructions on how to do the same. After bit trial and error, i was able to configure the JMSQueueAppender using log4j (with my own JMSQueueAppender class). Below is the configuration in log4j.properties file. log4j.rootLogger=INFO, stdout, jms ## Be sure that ActiveMQ messages are not logged to 'jms' appender log4j.logger.org.apache.activemq=INFO, stdout log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j

问题 I am trying to run a standalone java program using log4j, but receiving below while debugging (with no log4j related logs on console): log= {Logger@1343} "java.lang.Class:ERROR in 18b4aac2" Can someone please suggest what is wrong here? The code is as below: import org.apache.logging.log4j.LogManager; import org.apache.logging.log4j.core.Logger; import java.io.IOException; import java.sql.SQLException; public class log4jExample { static org.apache.logging.log4j.Logger log = LogManager