Я пытаюсь получить события из Log4J 1x в HDFS через Flume, используя приложение Log4J Flume. Создал два приложения FILE и flume. Это работает для приложения FILE, но с приложением flume программа просто зависает в Eclipse. Flume работает правильно, я могу отправлять сообщения на источник avro с помощью клиента avro и видеть сообщения в HDFS. Но он не интегрируется с Log4J 1x.
Я не вижу никаких исключений, кроме приведенного ниже в log.out.
Batch size string = null
Using Netty bootstrap options: {tcpNoDelay=true, connectTimeoutMillis=20000}
Connecting to localhost/127.0.0.1:41414
[id: 0x52a00770] OPEN
и из консоли Flume
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$NettyServerAvroHandler.channelClosed(NettyServer.java:209)] Connection to /127.0.0.1:46037 disconnected.
Если это поможет, я запустил программу в режиме отладки, а когда она зависла, я сделал приостановку и взял трассировку стека. Пытался заглянуть в код, но не уверен, почему программа зависает с приложением flume.
Daemon Thread [Avro NettyTransceiver I/O Worker 1] (Suspended)
Logger(Category).callAppenders(LoggingEvent) line: 205
Logger(Category).forcedLog(String, Priority, Object, Throwable) line: 391
Logger(Category).log(String, Priority, Object, Throwable) line: 856
Log4jLoggerAdapter.debug(String) line: 209
NettyTransceiver$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$Worker.run() line: 615
Thread.run() line: 744
Вот программа на Java
import java.io.IOException;
import java.sql.SQLException;
import org.apache.log4j.Logger;
public class log4jExample {
static Logger log = Logger.getRootLogger();
public static void main(String[] args) throws IOException, SQLException {
log.debug("Hello this is an debug message");
}
}
Вот log4j.properties
# Define the root logger with appender file
log = /home/vm4learning/WorkSpace/BigData/Log4J-Example/log
log4j.rootLogger = DEBUG, FILE, flume
# Define the file appender
log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=${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
Вот зависимости в Eclipse
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
Вот содержимое flume.conf
# 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
Как обойти эту проблему?
