Logback 过滤器不过滤消息

Question

我使用下面的过滤器进行了以下设置，希望过滤某些消息。然而，这些消息无论如何都会进入日志。
事实上，错误日志仅包含过滤器中指定的 WARN 或 ERROR 消息，但其他过滤不起作用。

我不明白这是怎么回事？

<appender name="ROOT_ERROR_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>${LOG_HOME}/main-error.log</file>
    <filter class="logging.LogbackCustomFilter" />
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
      <!-- daily rollover -->
      <fileNamePattern>${LOG_HOME}/main-error-%d{yyyy-MM-dd}.%i.log</fileNamePattern>
      <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
          <!-- or whenever the file size reaches 1GB -->
        <maxFileSize>1GB</maxFileSize>
      </timeBasedFileNamingAndTriggeringPolicy>
      <!-- keep 7 days' worth of history -->
      <maxHistory>7</maxHistory>
    </rollingPolicy>
    <encoder>
        <pattern>%date %-5level [%thread] - [%logger] - %msg%n</pattern>
    </encoder>
</appender>

<root level="DEBUG">
    <appender-ref ref="ROOT_FILE" />
    <appender-ref ref="ROOT_ERROR_FILE" />
</root>

日志过滤器 class:

package logging;

import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.filter.Filter;
import ch.qos.logback.core.spi.FilterReply;

public class LogbackCustomFilter extends Filter<ILoggingEvent> {

    private static final String closedChannelException = "ClosedChannelException";

    private static final String establishedConnectionWasAborted = "An established connection was aborted";

    private static final String connectionResetByPeer = "Connection reset by peer";

    private static final String brokenPipe = "Broken pipe";

    @Override
    public FilterReply decide(ILoggingEvent event) {
        if (event.getLevel().isGreaterOrEqual(Level.WARN)) {
            if (event.getMessage().contains(closedChannelException) ||
                    event.getMessage().contains(establishedConnectionWasAborted) ||
                    event.getMessage().contains(connectionResetByPeer) ||
                    event.getMessage().contains(brokenPipe)) {
                return FilterReply.DENY;
            } else {
                return FilterReply.NEUTRAL;
            }
        } else {
            return FilterReply.DENY;
        }
    }
}

无论如何，日志中充满了 "Connection reset by peer" 和 "Broken pipe" 消息，如下所示：

2018-03-05 21:05:09,933 WARN  [epollEventLoopGroup-2-6] - [io.netty.channel.DefaultChannelPipeline] - An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
io.netty.channel.unix.Errors$NativeIoException: syscall:read(..) failed: Connection reset by peer

或者这个：

2018-03-01 10:33:32,239 ERROR [epollEventLoopGroup-2-10] - [handler.duplex.ExceptionHandler] - channel unhandled exception
io.netty.channel.unix.Errors$NativeIoException: writevAddresses(..) failed: Connection reset by peer
    at io.netty.channel.unix.Errors.newIOException(Errors.java:117)
    at io.netty.channel.unix.Errors.ioResult(Errors.java:138)
    at io.netty.channel.unix.FileDescriptor.writevAddresses(FileDescriptor.java:156)
    at io.netty.channel.epoll.AbstractEpollStreamChannel.writeBytesMultiple(AbstractEpollStreamChannel.java:278)
    at io.netty.channel.epoll.AbstractEpollStreamChannel.doWriteMultiple(AbstractEpollStreamChannel.java:505)
    at io.netty.channel.epoll.AbstractEpollStreamChannel.doWrite(AbstractEpollStreamChannel.java:442)
    at io.netty.channel.AbstractChannel$AbstractUnsafe.flush0(AbstractChannel.java:934)
    at io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.epollOutReady(AbstractEpollChannel.java:555)
    at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:394)
    at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:304)
    at io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:858)
    at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:138)
    at java.lang.Thread.run(Thread.java:748)

Answer 1

在此处的示例消息中，event.getMessage() 将 return 仅记录第一行（例如 "An exceptionCaught() event was fired..." 或 "channel unhandled exception"）。

要深入了解有关以下异常的消息，请尝试 event.getThrowableProxy().getMessage() .

自然也经常不会有相关的异常 - 您还需要允许 event.getThrowableProxy() 为 null。

Logback 过滤器不过滤消息

Logback filter does not filter messages

filter

logback

netty