无法将log4j中的事件获取到flume中

cnwbcb6i  于 2021-06-03  发布在  Hadoop
关注(0)|答案(3)|浏览(287)

我试图通过使用log4j flume appender的flume将log4j 1x中的事件获取到hdfs中。创建了两个appender文件和flume。它适用于文件appender,但对于flume appender,程序只是挂起在eclipse中。flume工作正常,我可以使用avro客户端将消息发送到avro源,并在hdfs中查看消息。但是,它没有与log4j 1x集成。
我没有看到任何例外,除了下面的logout.out。

Batch size string = null
Using Netty bootstrap options: {tcpNoDelay=true, connectTimeoutMillis=20000}
Connecting to localhost/127.0.0.1:41414
[id: 0x52a00770] OPEN

从Flume控制台

2013-10-23 14:32:32,145 (pool-5-thread-1) [INFO - org.apache.avro.ipc.NettyServer$NettyServerAvroHandler.handleUpstream(NettyServer.java:171)] [id: 0x577cf6e4, /127.0.0.1:46037 => /127.0.0.1:41414] OPEN
2013-10-23 14:32:32,148 (pool-6-thread-1) [INFO - org.apache.avro.ipc.NettyServer$NettyServerAvroHandler.handleUpstream(NettyServer.java:171)] [id: 0x577cf6e4, /127.0.0.1:46037 => /127.0.0.1:41414] BOUND: /127.0.0.1:41414
2013-10-23 14:32:32,148 (pool-6-thread-1) [INFO - org.apache.avro.ipc.NettyServer$NettyServerAvroHandler.handleUpstream(NettyServer.java:171)] [id: 0x577cf6e4, /127.0.0.1:46037 => /127.0.0.1:41414] CONNECTED: /127.0.0.1:46037
2013-10-23 14:32:43,086 (pool-6-thread-1) [INFO - org.apache.avro.ipc.NettyServer$NettyServerAvroHandler.handleUpstream(NettyServer.java:171)] [id: 0x577cf6e4, /127.0.0.1:46037 :> /127.0.0.1:41414] DISCONNECTED
2013-10-23 14:32:43,096 (pool-6-thread-1) [INFO - org.apache.avro.ipc.NettyServer$NettyServerAvroHandler.handleUpstream(NettyServer.java:171)] [id: 0x577cf6e4, /127.0.0.1:46037 :> /127.0.0.1:41414] UNBOUND
2013-10-23 14:32:43,096 (pool-6-thread-1) [INFO - org.apache.avro.ipc.NettyServer$NettyServerAvroHandler.handleUpstream(NettyServer.java:171)] [id: 0x577cf6e4, /127.0.0.1:46037 :> /127.0.0.1:41414] CLOSED
2013-10-23 14:32:43,097 (pool-6-thread-1) [INFO - org.apache.avro.ipc.NettyServer$NettyServerAvroHandler.channelClosed(NettyServer.java:209)] Connection to /127.0.0.1:46037 disconnected.

如果有帮助的话,我确实在调试模式下运行了程序,当它挂起时,我执行了挂起并执行堆栈跟踪。试图查看代码,但不知道为什么程序挂起与flume appender。

Daemon Thread [Avro NettyTransceiver I/O Worker 1] (Suspended)  
Logger(Category).callAppenders(LoggingEvent) line: 205  
Logger(Category).forcedLog(String, Priority, Object, Throwable) line: 391  
Logger(Category).log(String, Priority, Object, Throwable) line: 856  
Log4jLoggerAdapter.debug(String) line: 209  
NettyTransceiver$NettyClientAvroHandler.handleUpstream(ChannelHandlerContext, ChannelEvent) line: 491  
DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline$DefaultChannelHandlerContext, ChannelEvent) line: 564  
DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(ChannelEvent) line: 792  
NettyTransportCodec$NettyFrameDecoder(SimpleChannelUpstreamHandler).channelBound(ChannelHandlerContext, ChannelStateEvent) line: 166  
NettyTransportCodec$NettyFrameDecoder(SimpleChannelUpstreamHandler).handleUpstream(ChannelHandlerContext, ChannelEvent) line: 98  
DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline$DefaultChannelHandlerContext, ChannelEvent) line: 564  
DefaultChannelPipeline.sendUpstream(ChannelEvent) line: 559  
Channels.fireChannelBound(Channel, SocketAddress) line: 199  
NioWorker$RegisterTask.run() line: 191  
NioWorker(AbstractNioWorker).processRegisterTaskQueue() line: 329  
NioWorker(AbstractNioWorker).run() line: 235  
NioWorker.run() line: 38  
DeadLockProofWorker$1.run() line: 42  
ThreadPoolExecutor.runWorker(ThreadPoolExecutor$Worker) line: 1145  
ThreadPoolExecutor$Worker.run() line: 615  
Thread.run() line: 744

这是java程序

import java.io.IOException;
import java.sql.SQLException;
import org.apache.log4j.Logger;
public class log4jExample {
    static Logger log = Logger.getRootLogger();
    public static void main(String[] args) throws IOException, SQLException {
       log.debug("Hello this is an debug message");
    }
}

这是log4j属性


# Define the root logger with appender file

log = /home/vm4learning/WorkSpace/BigData/Log4J-Example/log
log4j.rootLogger = DEBUG, FILE, flume

# Define the file appender

log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=${log}/log.out
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.conversionPattern=%m%n

# Define the flume appender

log4j.appender.flume = org.apache.flume.clients.log4jappender.Log4jAppender
log4j.appender.flume.Hostname = localhost
log4j.appender.flume.Port = 41414
log4j.appender.flume.UnsafeMode = false
log4j.appender.flume.layout=org.apache.log4j.PatternLayout
log4j.appender.flume.layout.ConversionPattern=%m%n

以下是eclipse中的依赖项

flume-ng-log4jappender-1.4.0.jar
log4j-1.2.17.jar
flume-ng-sdk-1.4.0.jar
avro-1.7.3.jar
netty-3.4.0.Final.jar
avro-ipc-1.7.3.jar
slf4j-api-1.6.1.jar
slf4j-log4j12-1.6.1.jar

这是flume.conf的内容


# Tell agent1 which ones we want to activate.

agent1.channels = ch1
agent1.sources = avro-source1
agent1.sinks = hdfs-sink1

# Define a memory channel called ch1 on agent1

agent1.channels.ch1.type = memory

# Define an Avro source called avro-source1 on agent1 and tell it

# to bind to 0.0.0.0:41414. Connect it to channel ch1.

agent1.sources.avro-source1.type = avro
agent1.sources.avro-source1.bind = 0.0.0.0
agent1.sources.avro-source1.port = 41414

# Define a logger sink that simply logs all events it receives

# and connect it to the other end of the same channel.

agent1.sinks.hdfs-sink1.type = hdfs
agent1.sinks.hdfs-sink1.hdfs.path = hdfs://localhost:9000/flume/events/

agent1.sinks.hdfs-sink1.channel = ch1
agent1.sources.avro-source1.channels = ch1

如何避开这个问题?

pes8fvy9

pes8fvy91#

我曾经在log4j中使用flume appender时遇到过类似的问题。每当我试图示例化logger对象时,程序就会挂起。我记得问题是类路径中没有所有必需的库,一旦我添加了它们,它就可以正常工作了。
我建议你先从迈克·珀西的简单例子开始。尽管pom.xml创建了一个包含所有依赖项的jar,但编辑它以将依赖jar文件复制到另一个目录给了我以下列表:

avro-1.7.4.jar
avro-ipc-1.7.4.jar
commons-codec-1.3.jar
commons-collections-3.2.1.jar
commons-compress-1.4.1.jar
commons-lang-2.5.jar
commons-logging-1.1.1.jar
flume-ng-log4jappender-1.4.0-cdh4.5.0.jar
flume-ng-sdk-1.4.0-cdh4.5.0.jar
hamcrest-core-1.1.jar
httpclient-4.0.1.jar
httpcore-4.0.1.jar
jackson-core-asl-1.8.8.jar
jackson-mapper-asl-1.8.8.jar
jetty-6.1.26.jar
jetty-util-6.1.26.jar
junit-4.10.jar
libthrift-0.7.0.jar
log4j-1.2.16.jar
netty-3.5.0.Final.jar
paranamer-2.3.jar
slf4j-api-1.7.2.jar
slf4j-jdk14-1.7.2.jar
snappy-java-1.0.4.1.jar
velocity-1.7.jar
xz-1.0.jar

其中的一些库(比如junit)可能不是必需的,但是我建议首先使用所有这些库,看看是否可以让示例正常工作,然后再尝试确定所需的最小集合。

ggazkfy8

ggazkfy82#

我也遇到过类似的问题,解决方法是:
将log4j.properties根记录器从debug更改为info级别。
但我不知道Flume里发生了什么。我正在试着调试它。如果有人知道,告诉我~~

shstlldc

shstlldc3#

我猜你是想通过flume记录flume的事件。我在其他appender中看到过这个问题,但在log4j1中没有。
我会考虑修改log4j.properties以排除flume、netty和avro事件,看看是否可以修复它。

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