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Posted to log4j-dev@logging.apache.org by "Zilong Song (JIRA)" <ji...@apache.org> on 2016/09/05 04:00:24 UTC
[jira] [Issue Comment Deleted] (LOG4J2-1561) print expected mdc
info to each line of the exception stacktrace
[ https://issues.apache.org/jira/browse/LOG4J2-1561?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zilong Song updated LOG4J2-1561:
--------------------------------
Comment: was deleted
(was: Yes. The {{output}} block in *Description* I write above is just the output. Each line of the exception stack trace ends with an extra string {{1234567890}}. That is the expected output.)
> print expected mdc info to each line of the exception stacktrace
> ----------------------------------------------------------------
>
> Key: LOG4J2-1561
> URL: https://issues.apache.org/jira/browse/LOG4J2-1561
> Project: Log4j 2
> Issue Type: Improvement
> Components: Core
> Affects Versions: 2.6.2
> Environment: OS X EI Caption, Java 1.7
> Reporter: Zilong Song
> Priority: Minor
> Labels: features
> Fix For: 2.6.2
>
> Original Estimate: 12h
> Remaining Estimate: 12h
>
> In some applications we need to append certain MDC information to each line of logs for a certain process, so that we can easily distinguish them from other logs, and do further analysis. But currently this information cannot be appended to any line of the stack trace, so it's hard to get the lines of the stack trace from a textual log file with massive lines of logs. This issue will append this information to each line of the stack trace.
> An already known usage for this feature is that we can easily get all lines of log for a certain process when we set an ID before the process starts, including all lines of the stack trace.
> Following is the code and configuration, and the output of it.
> {code:java|title=Test.main()}
> public static void main(String[] args) {
> final Logger logger = LogManager.getRootLogger();
> ThreadContext.put("proc_id", "1234567890");
> Exception exception = new Exception("sample exception");
> logger.info("an exception is logged", exception);
> }
> {code}
> {code:xml|title=log4j2.xml|}
> <?xml version="1.0" encoding="UTF-8"?>
> <Configuration status="warn" name="live-im">
> <Appenders>
> <Console name="console-log" target="SYSTEM_OUT">
> <PatternLayout pattern="%d %p [%t] %C{2} (%F:%L) - %m %X{proc_id}%n%cEx{proc_id}"/>
> </Console>
> </Appenders>
> <Loggers>
> <Root level="all">
> <AppenderRef ref="console-log"/>
> </Root>
> </Loggers>
> </Configuration>
> {code}
> {code:title=output}
> 2016-09-03 22:56:56,721 INFO [main] pattern.Test (Test.java:17) - an exception is logged 1234567890
> java.lang.Exception: sample exception 1234567890
> at org.apache.logging.log4j.core.pattern.Test.main(Test.java:16) [classes/:?] 1234567890
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_91] 1234567890
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_91] 1234567890
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_91] 1234567890
> at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_91] 1234567890
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144) [idea_rt.jar:?] 1234567890
> {code}
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