log4j2如何禁用“日期：”查找-log4j引发异常

Question

编辑似乎不可能在此刻归档一个问题。

我正在apache camel应用程序中使用log4j2。在骆驼中，可以通过这种方式配置文件名“？filename=${date：now：yyyymmdd-hhmmss}id.${id}.gz”

2014-11-24 11:29:19,218 ERROR Invalid date format: "now:yyyyMMdd-HHmmss", using default java.lang.IllegalArgumentExcepti
on: Illegal pattern character 'n'
        at java.text.SimpleDateFormat.compile(Unknown Source)
        at java.text.SimpleDateFormat.initialize(Unknown Source)
        at java.text.SimpleDateFormat.<init>(Unknown Source)
        at java.text.SimpleDateFormat.<init>(Unknown Source)
        at org.apache.logging.log4j.core.lookup.DateLookup.formatDate(DateLookup.java:60)
        at org.apache.logging.log4j.core.lookup.DateLookup.lookup(DateLookup.java:53)
        at org.apache.logging.log4j.core.lookup.Interpolator.lookup(Interpolator.java:144)
        at org.apache.logging.log4j.core.lookup.StrSubstitutor.resolveVariable(StrSubstitutor.java:1008)
        at org.apache.logging.log4j.core.lookup.StrSubstitutor.substitute(StrSubstitutor.java:926)
        at org.apache.logging.log4j.core.lookup.StrSubstitutor.substitute(StrSubstitutor.java:816)
        at org.apache.logging.log4j.core.lookup.StrSubstitutor.replace(StrSubstitutor.java:385)
        at org.apache.logging.log4j.core.pattern.MessagePatternConverter.format(MessagePatternConverter.java:71)
        at org.apache.logging.log4j.core.pattern.PatternFormatter.format(PatternFormatter.java:36)
        at org.apache.logging.log4j.core.layout.PatternLayout.toSerializable(PatternLayout.java:189)
        at org.apache.logging.log4j.core.layout.PatternLayout.toSerializable(PatternLayout.java:53)
        at org.apache.logging.log4j.core.layout.AbstractStringLayout.toByteArray(AbstractStringLayout.java:52)
        at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(AbstractOutputStreamAppender.java:
104)
        at org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:97)
        at org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:428)
        at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:407)
        at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:365)
        at org.apache.logging.log4j.core.Logger.logMessage(Logger.java:112)
        at org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:1347)
        at org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:1312)
        at org.apache.logging.slf4j.Log4jLogger.debug(Log4jLogger.java:132)
        at org.apache.camel.util.IntrospectionSupport.setProperty(IntrospectionSupport.java:518)
        at org.apache.camel.util.IntrospectionSupport.setProperty(IntrospectionSupport.java:570)
        at org.apache.camel.util.IntrospectionSupport.setProperties(IntrospectionSupport.java:454)
        at org.apache.camel.util.EndpointHelper.setProperties(EndpointHelper.java:249)
        at org.apache.camel.impl.DefaultComponent.setProperties(DefaultComponent.java:272)
        at org.apache.camel.component.file.GenericFileComponent.createEndpoint(GenericFileComponent.java:67)
        at org.apache.camel.component.file.GenericFileComponent.createEndpoint(GenericFileComponent.java:37)
        at org.apache.camel.impl.DefaultComponent.createEndpoint(DefaultComponent.java:123)
        at org.apache.camel.impl.DefaultCamelContext.getEndpoint(DefaultCamelContext.java:514)
        at org.apache.camel.impl.DefaultCamelContext.getEndpoint(DefaultCamelContext.java:547)

编辑，非常容易在测试中重现：

public class LogTest {

    private Logger log = LoggerFactory.getLogger(LogTest.class);

    @Test
    public void test() {
        log.info("${date:now:buhu}");

    }
}

它对美元{date：}至关重要--只有“data：now”起作用。所以这个问题完全独立于camel，但是camel使用了${date：...}几件事的模式。这里有一个重现问题的简单路线--异常将在骆驼设置阶段抛出--不需要测试代码--日志级别必须是“debug”！：

public class LogTest extends CamelTestSupport{

    private Logger log = LoggerFactory.getLogger(LogTest.class);

    @Test
    public void test() {
        //log.info("${date:now:yyyyMMdd-HHmmss}");

    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {

            @Override
            public void configure() throws Exception {
                from("direct:a").to("file:./?fileName=${date:now:yyyyMMdd-HHmmss}ID.${id}.gz");
            }
        };
    }

}

Answer 1

这个问题在2.7版本的log4j2中得到了修复。

解决方案是升级到该版本（或更高版本），并在pattern属性中添加选项“{nolookups}”到%msg。

%msg{nolookups}

例如：

<PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level %class{1} %L %M %t - %msg{nolookups}%n%xEx%n" />