我尝试在最新的 Java 11 上运行我的项目。一切正常,除了特定的文件记录器。日志记录在以前的 Java 版本(10、9、8)上工作正常,但在 Java 11 上不行。
在服务器运行期间,我只看到 1 个警告:
WARNING: sun.reflect.Reflection.getCallerClass is not supported. This will impact performance.
这是我的配置:
<Configuration>
<Appenders>
<RollingFile name="postgresDBLog" fileName="${sys:logs.folder}/postgres.log"
filePattern="${sys:logs.folder}/archive/postgres.log.%d{yyyy-MM-dd}">
<PatternLayout>
<pattern>%d{HH:mm:ss.SSS} - %msg%n</pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy/>
</Policies>
</RollingFile>
<RollingFile name="workersLog" fileName="${sys:logs.folder}/worker.log"
filePattern="${sys:logs.folder}/archive/worker.log.%d{yyyy-MM-dd}">
<PatternLayout>
<pattern>%d{HH:mm:ss.SSS} - %msg%n</pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy/>
</Policies>
</RollingFile>
<RollingFile name="statsLog" fileName="${sys:logs.folder}/stats.log"
filePattern="${sys:logs.folder}/archive/stats.log.%d{yyyy-MM-dd}">
<PatternLayout>
<pattern>%msg%n</pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy/>
</Policies>
</RollingFile>
<RollingFile name="userLog" fileName="${sys:logs.folder}/blynk.log"
filePattern="${sys:logs.folder}/archive/blynk.log.%d{yyyy-MM-dd}">
<PatternLayout>
<pattern>%d{HH:mm:ss.SSS} %-5level- %msg%n</pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy/>
</Policies>
</RollingFile>
</Appenders>
<Loggers>
<Logger name="cc.blynk.server.workers" level="debug" additivity="false">
<appender-ref ref="workersLog"/>
</Logger>
<Logger name="cc.blynk.server.workers.StatsWorker" level="debug" additivity="false">
<appender-ref ref="statsLog"/>
</Logger>
<Logger name="cc.blynk.server.db" level="debug" additivity="false">
<appender-ref ref="postgresDBLog"/>
</Logger>
<Logger name="com.zaxxer.hikari" level="OFF" additivity="false">
</Logger>
<Logger name="org.asynchttpclient.netty.channel" level="OFF" additivity="false" />
<!-- turn off netty errors in debug mode for native library loading
https://github.com/blynkkk/blynk-server/issues/751 -->
<Logger name="io.netty" level="INFO" additivity="false" />
<Root>
<AppenderRef ref="userLog"/>
</Root>
</Loggers>
</Configuration>
所有记录器,除了 userLog
工作正常。但是,userLog
是空的。
log4j2 version 2.11.1
Ubuntu 16.04.5 LTS
java version "11.0.1" 2018-10-16 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.1+13-LTS)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.1+13-LTS, mixed mode)
更新:
将 level="info"
添加到根级别可解决此问题。
<Root level="info">
<AppenderRef ref="userLog"/>
</Root>
但是,在我的项目中,我使用的代码基于属性文件设置日志级别。这是一个代码:
private static void changeLogLevel(String level) {
Level newLevel = Level.valueOf(level);
LoggerContext ctx = (LoggerContext) LogManager.getContext(false);
Configuration conf = ctx.getConfiguration();
conf.getLoggerConfig(LogManager.ROOT_LOGGER_NAME).setLevel(newLevel);
ctx.updateLoggers(conf);
}
这部分似乎不再适用于 Java 11。
最佳答案
如果有人在使用 Maven 并且在组装扁平 jar 时遇到同样的问题,这是我为解决同样的问题所做的:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.2.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>foo.bar.Generate</mainClass>
<manifestEntries>
<Multi-Release>true</Multi-Release>
</manifestEntries>
</transformer>
<transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
重要的部分是<Multi-Release>true</Multi-Release>
.
请注意,我现在用来更改记录器级别的 Java 代码是:
Configurator.setAllLevels("foo.bar", Level.DEBUG);
关于java - log4j2 与 Java 11 兼容吗?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53049346/