log4j

Is there any log library for C? (like log4j for C) [closed]

由 假如想象 提交于 2019-12-09 08:30:37
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last year . I've been working in Java for a long time, and I've been accostumed to use the log4j library for logs. It's a wonderful, and now that I'm moving to C I'd like to find if there is a similar library for logs in this language. 回答1: So far I know of the following libraries for logging: log4c, sclog4c, syslog, zlog.

How to set log4j property file?

由 北城余情 提交于 2019-12-09 08:21:57
问题 I have an Eclipse Java Project which uses log4j. I can't set the log4j configuration file to be accessed by file path. I have to export and run the project in a jar. Here is how i trying: public class Wita { static Logger logger; public static void main(String[] args) { System.setProperty("log4j.configuration", new File("").getCanonicalPath()+File.separatorChar+"resources"+File.separatorChar+"log4j.xml" ); // System.out.println( System.getProperty("log4j.configuration") ); logger = Logger

Is Log4j isDebugEnabled() necessary before using logger.debug()? [duplicate]

由 依然范特西╮ 提交于 2019-12-09 07:43:21
问题 This question already has answers here : Is there a need to do a if(log.isDebugEnabled()) { … } check? [duplicate] (5 answers) Closed 4 years ago . When I was going through some code, I noticed the use of logger as follows, if(logger.isDebugEnabled()) logger.debug("Something.."); But in some codes, I observed like this. logger.debug("Something.."); When I looked at the source of log4j, in the debug() method of Logger itself if(logger.isDebugEnabled()) was checked. Then why do we need this

Parsing JSON in Logstash

由 独自空忆成欢 提交于 2019-12-09 07:03:10
问题 I have some log files generated by Log4J2. I am outputting the logs into a .json file using the JSONLayout in the log4j2.xml configuration file. My JSONLayout is defined like this: <JSONLayout complete="false"></JSONLayout> As logs get entered into the log file on my machine, they are appended, one-after-another, and look like this in logs.log: { "logger":"com.mycompany.myLogger", "timestamp":"1396792374326", "level":"ERROR", "thread":"pool-2-thread-2", "message":"System: unable to perform

Embed Apache ZooKeeper in Jetty generates Debug log message

由 陌路散爱 提交于 2019-12-09 06:55:24
I am using Jetty 8 and ZooKeeper 3.4.5. When I connect to ZooKeeper, jetty keep generating DEBUG level message. How to suppress it? 16:54:56.757 [main-SendThread(127.0.0.1:2181)] DEBUG o.a.z.client.ZooKeeperSaslClient - Could not retrieve login configuration: java.lang.SecurityException: Unable to locate a login configuration 16:54:56.758 [main-SendThread(127.0.0.1:2181)] DEBUG o.a.z.client.ZooKeeperSaslClient - Could not retrieve login configuration: java.lang.SecurityException: Unable to locate a login configuration 16:54:56.758 [main-SendThread(127.0.0.1:2181)] DEBUG o.a.z.client

How to use log4j's FileAppenders asynchronously?

由 不问归期 提交于 2019-12-09 04:44:59
问题 I work on a low-latency trading application. We'd like to increase the amount of lof4j logging that we write to file, whilst minimising the impact on our end-to-end processing time. What is the recommended way of doing this? I think FileAppender.append is synchronous, so we need to do something a bit smarter than that.... 回答1: Yes, the appenders are synchronous. You want something like this: http://www.spartanjava.com/2009/asynchronous-logging-with-log4j/ 回答2: bear in mind that AsyncAppender

Exception in thread “main” java.lang.NoSuchMethodError: org.slf4j.impl.StaticLoggerBinder.getSingleton()Lorg/slf4j/impl/StaticLoggerBinder

由 醉酒当歌 提交于 2019-12-09 03:21:22
问题 My local environment: OSX 10.9.2, java1.6 I use java api to connect hbase and maven to manage my project, I added Hbase-0.94.17 and Hadoop-core-1.0.4 into pom.xml, when I ran my .java program to connect Hbase I got the following error: SLF4J: slf4j-api 1.6.x (or later) is incompatible with this binding. SLF4J: Your binding is version 1.5.5 or earlier. SLF4J: Upgrade your binding to version 1.6.x. Exception in thread "main" java.lang.NoSuchMethodError: org.slf4j.impl.StaticLoggerBinder

How do I redirect a javaw.exe console output to a log file?

由 早过忘川 提交于 2019-12-09 02:49:05
问题 I am wanting to start my Java program from a batch file. This is the script I want to use to start the app but the problem is that I am not able to get the console output to redirect to a log file. Can anyone offer any hints without having to edit any code, and by using Java command line options or something? @echo off set TASK=MyApp TITLE %TASK% start javaw.exe -cp .;Server.jar;Util.jar com.manage.Program %1 > log.log 2>&1 taskkill /T /FI "WINDOWTITLE eq %TASK%" So, the above works, and

Log4j JDBCAppender to log stacktraces

由 允我心安 提交于 2019-12-09 01:28:35
问题 Using org.apache.log4j.jdbc.JDBCAppender , how can I get stracktraces logged with warn and error into the PatternLayout . I'm logging like logger.warn("warning description", e); logger.error("error description", e); I get the String descriptions into the table, but the Throwable's stacktrace is now where. Is there another parameter that I can access via the PatternLayout . Currently I am using "INSERT INTO app_logs (app, log_date, log_level, location, loc, message) VALUES ('my-apps-name', '%d

Different log files for multiple threads using log4j2

由 橙三吉。 提交于 2019-12-09 01:06:12
问题 I am running a Java application in which I am invoking multiple threads, each with some unique names. Now I want to create multiple log files for each of them and the name of the log files should be as the thread names. Is this possible using log4j2. Please help me write log4j2 configuration files. Thank you in advance. 回答1: This can be done with the RoutingAppender. The FAQ page has a good example config. 回答2: I agree a RoutingAppender is the way to go. I initially used the routing appender
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