December 2011 - logback-user

DBAppender - can I use my own tables?
by Nadia Kunkov 23 Dec '11

23 Dec '11

Hello everyone - I wanted to use the logback DBAppender but in the documentation it says that it logs to a set of 3 specific tables. Is it possible to change the tables and use some other ones? Nadia

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logback console appender slow on windows xp
by Peter Kullmann 22 Dec '11

22 Dec '11

Hi, we had a problem with the performance of our application and it boiled down to very bad performance of the console appender when there is no console (in particular on windows xp). You can see the whole context of the issue here: http://www.eclipse.org/forums/index.php/m/768740/#msg_768740 Here's the conclusion and the code for my experiments: package testlogback; import java.io.FileWriter; import java.io.IOException; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class Main { public static void main(String[] args) throws IOException { Logger logger = LoggerFactory .getLogger("chapters.introduction.HelloWorld1"); long start = System.currentTimeMillis(); for (int i = 0; i < 10000; i++) { logger.debug("Hello world."); } long end = System.currentTimeMillis(); FileWriter fileWriter = new FileWriter("logbacktest.out"); fileWriter.write("Time: " + (end - start) + "\n"); fileWriter.close(); System.out.println("Time: " + (end - start)); } } On my windows box it prints out "Time: 140" when started as "java -jar testlogback.jar". If I start "javaw -jar testlogback.jar" it uses 100% CPU for about 20 seconds (for effectively doing nothing). This is the case for Sun ire 6 and 7 on windows xp. On windows 7 the situation is better: javaw uses only about 7 seconds (which is still too much, I guess). Best regards, Peter

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Maven error installing logback
by Scott Miller 22 Dec '11

22 Dec '11

I am using the introduction in the documentation as my guide. I am new to Maven and logback. When I run mvn install I get one test error. It is testAppendAccessEvent(ch.qos.logback.access.db.DBAppenderTest) How can I fix this to complete Maven install? Scott

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Re: [logback-user] logback - no applicable action - using the example from chapter 4
by Nadia Kunkov 21 Dec '11

21 Dec '11

Please, disregard my question... I was using the wrong type of the File Appender... Thank you Nadia ------------------------------------------------------------------------------------ Hello, Trying the logback file appender and all went well until I created the Rolling and Triggering policies. I'm following the examples in Chapter 4, so not sure how can this be wrong. The errors and the logback.xml are below: 16:13:23,158 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@25:78 - no applicable action for [rollingPolicy], current pattern is [[configuration][appender][rollingPolicy]] 16:13:23,158 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@26:24 - no applicable action for [fileNamePattern], current pattern is [[configuration][appender][rollingPolicy][fileNamePattern]] 16:13:23,159 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@27:17 - no applicable action for [minIndex], current pattern is [[configuration][appender][rollingPolicy][minIndex]] 16:13:23,159 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@28:17 - no applicable action for [maxIndex], current pattern is [[configuration][appender][rollingPolicy][maxIndex]] 16:13:23,159 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@31:85 - no applicable action for [triggeringPolicy], current pattern is [[configuration][appender][triggeringPolicy]] 16:13:23,160 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@32:20 - no applicable action for [maxFileSize], current pattern is [[configuration][appender][triggeringPolicy][maxFileSize]] <configuration> <contextName>Test</contextName> <appender name="FILE" class="ch.qos.logback.core.FileAppender"> <file>${JBOSS_HOME}/server/default/log/myApp.log</file> <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy"> <fileNamePattern>myApp.%i.log</fileNamePattern> <minIndex>1</minIndex> <maxIndex>5</maxIndex> </rollingPolicy> <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy"> <maxFileSize>1KB</maxFileSize> </triggeringPolicy> <encoder> <pattern>%date %contextName %level [%thread] %logger{36} [%file:%line] %msg%n</pattern> </encoder> </appender> <logger name="com.test.logback" level="DEBUG" /> <root level="debug"> <appender-ref ref="FILE" /> <appender-ref ref="STDOUT" /> </root> </configuration> Nadia

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logback - no applicable action - using the example from chapter 4
by Nadia Kunkov 21 Dec '11

21 Dec '11

Hello, Trying the logback file appender and all went well until I created the Rolling and Triggering policies. I'm following the examples in Chapter 4, so not sure how can this be wrong. The errors and the logback.xml are below: 16:13:23,158 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@25:78 - no applicable action for [rollingPolicy], current pattern is [[configuration][appender][rollingPolicy]] 16:13:23,158 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@26:24 - no applicable action for [fileNamePattern], current pattern is [[configuration][appender][rollingPolicy][fileNamePattern]] 16:13:23,159 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@27:17 - no applicable action for [minIndex], current pattern is [[configuration][appender][rollingPolicy][minIndex]] 16:13:23,159 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@28:17 - no applicable action for [maxIndex], current pattern is [[configuration][appender][rollingPolicy][maxIndex]] 16:13:23,159 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@31:85 - no applicable action for [triggeringPolicy], current pattern is [[configuration][appender][triggeringPolicy]] 16:13:23,160 |-ERROR in ch.qos.logback.core.joran.spi.Interpreter@32:20 - no applicable action for [maxFileSize], current pattern is [[configuration][appender][triggeringPolicy][maxFileSize]] <configuration> <contextName>Test</contextName> <appender name="FILE" class="ch.qos.logback.core.FileAppender"> <file>${JBOSS_HOME}/server/default/log/myApp.log</file> <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy"> <fileNamePattern>myApp.%i.log</fileNamePattern> <minIndex>1</minIndex> <maxIndex>5</maxIndex> </rollingPolicy> <triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy"> <maxFileSize>1KB</maxFileSize> </triggeringPolicy> <encoder> <pattern>%date %contextName %level [%thread] %logger{36} [%file:%line] %msg%n</pattern> </encoder> </appender> <logger name="com.test.logback" level="DEBUG" /> <root level="debug"> <appender-ref ref="FILE" /> <appender-ref ref="STDOUT" /> </root> </configuration> Nadia

1 0

Prudent mode logging to NFS-mounted file
by ThomasSchuessler2＠Eaton.com 21 Dec '11

21 Dec '11

We seem to be losing quite a few log records in a clustered web application writing to an NFS-mounted file with the configuration shown below. We are running logback-1.0.0. Any suggestions? <appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender"> <append>true</append> <prudend>true</prudend> <encoder> <pattern>%d ${HOSTNAME} [%t] %-5p %c - {%marker} %m%n</pattern> </encoder> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <maxHistory>10</maxHistory> <fileNamePattern>/xxx/log-%d.log</fileNamePattern> </rollingPolicy> </appender> --------------------------------------------------------------------------

2 1

log rollover using %d multiple times in file name pattern?
by Thomas Corte 21 Dec '11

21 Dec '11

Hello, I'm trying to configure a log rollover with logs being *rolled daily* and put into a directory named "yyyy-MM", i.e. one folder for each *month* containing that month's logs. I'm using the following appender config: <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>app.log</file> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  <fileNamePattern%d{yyyy-MM}/app.%d{yyyy-MM-dd}.log</fileNamePattern> </rollingPolicy> <encoder> <pattern>%d{"yyyy-MM-dd HH:mm:ss,SSS"} [%thread] %-5level %logger{36} - %msg%n%xEx</pattern> </encoder> </appender> However, it seems as if the current logback implementation merely considers the first %d specification, which leads to a log rotation only once per month instead of the desired once per day frequency. I figure this is because via %d, the log rotation frequency and the file name pattern are somewhat tied together and seemingly can't be specified independently. Is there any way to achieve what I'm trying to do without writing custom code? Best regards, Thomas -- Thomas Corte Thomas.Corte(a)knipp.de

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logback database appender
by Nadia Kunkov 20 Dec '11

20 Dec '11

Quick question - does logback database appender work only with the 3 pre-defined tables? I would like to log to my own tables that have different structure. Is it possible to do? Thanks so much! Nadia

1 0

Some logback-access questions
by Mike Wartes 20 Dec '11

20 Dec '11

Hello, I've been trying out the logback-access module as a potential replacement for Tomcat's AccessLogValve. I've run into a couple of issues that I'm wondering if anyone can help with. 1. It doesn't look like logback-access has the ability to print the query string like the %q value of Tomcat's AccessLogValve does. Am I missing something, or are there any workarounds? Unfortunately this is actually a dealbreaker for me if I can't make it work, since I need to have query strings in my access logs. 2. This one isn't a dealbreaker, but I'd like to configure one access log per webapp in my Tomcat container instead of one access log for all webapps. My first thought was that it'd be simple enough to configure the LogbackValve under each webapp's Context instead of under the Host element like the documentation suggests. However, I got stuck because of the way the LogbackValve is looking up its configuration file. I can't put the logback-access file in the container's conf directory because I want separate configuration per webapp. I also can't specify a relative path to the right webapp's folder because it can be in different places in different environments (the webapp files might not be in the container's folder at all). If I could look the configuration file up on the classpath I think that'd be pretty ideal, but from what I can tell it doesn't seem like that's possible. Any suggestions? I'm loving logback-classic and was excited to see that there is a module for access logs as well, but for the time being I think I may have to go back to the AccessLogValve. Thanks in advance.

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starting with log back
by Nadia Kunkov 20 Dec '11

20 Dec '11

Hello, I'm trying to start off with logback but I'm having some silly problems. In the chapter2 it states: First, copy logback-audit/audit-server-generator/ folder which ships with logback-audit to a directory of your choice I can't find this generator in the distribution.... Also, I don't use maven - I use ant. Is there a quick way to set this up with Ant? Appreciate your help! Nadia

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