[jira] [Updated] (LOG4J2-726) logging hang when PatternLayout's pattern has miss pattern

["Remko Popma (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LOG4J2-726?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Remko Popma updated LOG4J2-726:
-------------------------------

    Description: 

{code}
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
  <Appenders>
    <Console name="Console" target="SYSTEM_OUT">
      <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
    </Console>
  </Appenders>
  <Loggers>
    <Logger name="com.foo.Bar" level="trace" additivity="false">
      <AppenderRef ref="Console"/>
    </Logger>
    <Root level="error">
      <AppenderRef ref="Console"/>
    </Root>
  </Loggers>
</Configuration>
{code}

The above configuration syntax is correct. However, if one makes a mistake and instead writes:

{code}
<PatternLayout pattern="%d\{HH:mm:ss.SSS  [%t] %-5level %logger\{36\} - %msg%n"/>
{code}

Note the ommited character "\}" in the date pattern.

Run sample application.
This will hang log4j2 logging system.

sample source code:

{code}
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
 
public class HelloWorld {
    private static Logger logger = LogManager.getLogger("HelloWorld");
    public static void main(String[] args) {
        logger.info("Hello, World!");
    }
}
{code}

appear pattern configuration error or logging print miss pattern.




  was:


1.<?xml version="1.0" encoding="UTF-8"?>
2.<Configuration status="WARN">
3.  <Appenders>
4.    <Console name="Console" target="SYSTEM_OUT">
5.      <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
6.    </Console>
7.  </Appenders>
8.  <Loggers>
9.    <Logger name="com.foo.Bar" level="trace" additivity="false">
10.      <AppenderRef ref="Console"/>
11.    </Logger>
12.    <Root level="error">
13.      <AppenderRef ref="Console"/>
14.    </Root>
15.  </Loggers>
16.</Configuration>

correct configuration syntax.

5.      <PatternLayout pattern="%d{HH:mm:ss.SSS  [%t] %-5level %logger{36} - %msg%n"/>

write miss pattern 5 line. ommited character "}"

run sample application.
hang log4j2 logging system.

sample source blow.

import org.apache.logging.log4j.LogManager;
2.import org.apache.logging.log4j.Logger;
3. 
4.public class HelloWorld {
5.    private static Logger logger = LogManager.getLogger("HelloWorld");
6.    public static void main(String[] args) {
7.        logger.info("Hello, World!");
8.    }
9.}

appear pattern configuration error or logging print miss pattern.

















> logging hang when PatternLayout's pattern has miss pattern
> ----------------------------------------------------------
>
>                 Key: LOG4J2-726
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-726
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Configurators
>    Affects Versions: 2.0
>         Environment: windows 8.1 64bit
> java 1.7.0_55 64bit 
> log4j2 2.0
>            Reporter: moonumi
>
> {code}
> <?xml version="1.0" encoding="UTF-8"?>
> <Configuration status="WARN">
>   <Appenders>
>     <Console name="Console" target="SYSTEM_OUT">
>       <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
>     </Console>
>   </Appenders>
>   <Loggers>
>     <Logger name="com.foo.Bar" level="trace" additivity="false">
>       <AppenderRef ref="Console"/>
>     </Logger>
>     <Root level="error">
>       <AppenderRef ref="Console"/>
>     </Root>
>   </Loggers>
> </Configuration>
> {code}
> The above configuration syntax is correct. However, if one makes a mistake and instead writes:
> {code}
> <PatternLayout pattern="%d\{HH:mm:ss.SSS  [%t] %-5level %logger\{36\} - %msg%n"/>
> {code}
> Note the ommited character "\}" in the date pattern.
> Run sample application.
> This will hang log4j2 logging system.
> sample source code:
> {code}
> import org.apache.logging.log4j.LogManager;
> import org.apache.logging.log4j.Logger;
>  
> public class HelloWorld {
>     private static Logger logger = LogManager.getLogger("HelloWorld");
>     public static void main(String[] args) {
>         logger.info("Hello, World!");
>     }
> }
> {code}
> appear pattern configuration error or logging print miss pattern.



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