logging

问题 Logback supports using an async appender with the class ch.qos.Logback.classic.AsyncAppender and according to the documentation, this will reduce the logging overhead on the application. So, why not just make it the default out of the box. What usecases are better served by using a sync appender. One problem I can see with the Async appender is that the log messages will not be chronological. Are there any other such limitations? 回答1: The AsyncAppender acts as a dispatcher to another appender

问题 I am using a third party library (cannot modify it) that uses for logging system.out.println statements. The output shows fine in the console but I am not able to retrieve those information in the catalina[...].log file? Is it possible to send those to log4j? 回答1: System.out.println() prints out to stdout. Therefore, if you want to see these statements in a log file, you can just redirect stdout where you want it in the Tomcat startup script. 回答2: When running Tomcat on unixes, the console

问题 I am trying to implement a simple log using Nlog Refresh 1.0 for a class Library project. It seems nlog does not create a logfile when it's instantiated from within a dll. Is there some other way around this ? my config file looks like this: <nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" throwExceptions="true"> <targets> <target name="file" xsi:type="File" fileName="${basedir}/nlog.txt" /> <target name="console" xsi:type=

问题 I have a situation in which I want to print all the exception caught in catch block using logger. try { File file = new File("C:\\className").mkdir(); fh = new FileHandler("C:\\className\\className.log"); logger.addHandler(fh); logger.setUseParentHandlers(false); SimpleFormatter formatter = new SimpleFormatter(); fh.setFormatter(formatter); } catch (Exception e) { logger.info(e); } i got the error logger cannot be applied to java.io.Exception... My concern is if I do so many thing in try

问题 I want to store logs of pods in kubernetes at one place. i.e output of kubectl logs podname I referred this question Kubernetes basic pod logging which gives me successfully logs for counter...How to modify this args attribute in spec to get output of kubectl logs podname stored in file at one place? Here is my pod.yaml i created but not able to see any file at location /tmp/logs/ apiVersion: v1 kind: Service metadata: name: spring-boot-demo-pricing spec: ports: - name: spring-boot-pricing

问题 While using Eclipse > Run as Junit Test or the play command line, only the errors are logged to the console. How to show warning, info, and debug messages generated during Junit tests ? app/controllers/Application.java package controllers; import play.*; import play.mvc.*; public class Application extends Controller { public static Result index() { Logger.trace("**** Logger.isTraceEnabled = " + Logger.isTraceEnabled()+ " *****"); Logger.debug("**** Logger.isDebugEnabled = " + Logger

问题 I would like to start off a python process and log subprocess error messages to the logging object of the parent script. I would ideally like to unify the log streams into one file. Can I somehow access the output stream of the logging class? One solution I know of is to use proc log for logging. As described in the answer below, I could read from the proc.stdin and stderr, but I'd have duplicate logging headers. I wonder if there is a way to pass the file descriptor underlying the logging

问题 I would like to start off a python process and log subprocess error messages to the logging object of the parent script. I would ideally like to unify the log streams into one file. Can I somehow access the output stream of the logging class? One solution I know of is to use proc log for logging. As described in the answer below, I could read from the proc.stdin and stderr, but I'd have duplicate logging headers. I wonder if there is a way to pass the file descriptor underlying the logging

问题 I have a windows service that writes out log file entries to an XML log file. I maintain a handle to the log file while the service is operational, and close, flush and dispose of it when the service is stopped. The file write operations are by the service only, and I have the filestream open in FileAccess.ReadWrite while sharing is set to FileShare.Read. I would like to be able to open and view this file with an XmlRead() call by another application, but I get an error stating the file is

问题 Can't find any input plugin for Relational Databases in Logstash Documentation. What is the best approach to import data from one Relational Database Table with logstash? Is to connect Elastic Search directly to the database using JDBC? 回答1: You'll need to use JDBC River (https://github.com/jprante/elasticsearch-river-jdbc) for loading JDBC data into elastic search (or write your own code to do it). It looks like there are several JIRAs open requesting JDBC loading in Logstash, but they haven