我是水槽新手。我试图以“多合一”的形式在应用程序中启动它，但无法理解出了什么问题。能否请你帮忙？ 它无法连接到本地主机。 Source code
2018-10-28 23:57:59,757+0200] [INFO ] [AvroSink] (main:) Attempting to create Avro Rpc client.
[2018-10-28 23:57:59,777+0200] [WARN ] [NettyAvroRpcClient] (main:) Using default maxIOWorkers
[2018-10-28 23:58:01,057+0200] [WARN ] [AbstractRpcSink] (main:) Unable to create Rpc client using hostname: pc0039, port: 44444
org.apache.flume.FlumeException: NettyAvroRpcClient { host: pc0039, port: 44444 }: RPC connection error at org.apache.flume.api.NettyAvroRpcClient.connect(NettyAvroRpcClient.java:181)
at org.apache.flume.api.NettyAvroRpcClient.connect(NettyAvroRpcClient.java:120)
at org.apache.flume.api.NettyAvroRpcClient.configure(NettyAvroRpcClient.java:638)
at org.apache.flume.api.RpcClientFactory.getInstance(RpcClientFactory.java:90)
at org.apache.flume.sink.AvroSink.initializeRpcClient(AvroSink.java:127)
at org.apache.flume.sink.AbstractRpcSink.createConnection(AbstractRpcSink.java:210)
at org.apache.flume.sink.AbstractRpcSink.start(AbstractRpcSink.java:290)
at org.apache.flume.sink.DefaultSinkProcessor.start(DefaultSinkProcessor.java:45)
at org.apache.flume.SinkRunner.start(SinkRunner.java:79)
at org.apache.flume.agent.embedded.EmbeddedAgent.doStart(EmbeddedAgent.java:224)
at org.apache.flume.agent.embedded.EmbeddedAgent.start(EmbeddedAgent.java:127)
at com.com.test.flume.Program.createAgent(Program.java:97)
at com.com.test.flume.Program.main(Program.java:65)
Caused by: java.io.IOException: Error connecting to pc0039/192.168.0.103:44444
at org.apache.avro.ipc.NettyTransceiver.getChannel(NettyTransceiver.java:261)
at org.apache.avro.ipc.NettyTransceiver.<init>(NettyTransceiver.java:203)
at org.apache.avro.ipc.NettyTransceiver.<init>(NettyTransceiver.java:152)
at org.apache.flume.api.NettyAvroRpcClient.connect(NettyAvroRpcClient.java:169)
... 12 more
Caused by: java.net.ConnectException: Connection refused: no further information: pc0039/192.168.0.103:44444
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
at org.jboss.netty.channel.socket.nio.NioClientBoss.connect(NioClientBoss.java:152)
at org.jboss.netty.channel.socket.nio.NioClientBoss.processSelectedKeys(NioClientBoss.java:105)
at org.jboss.netty.channel.socket.nio.NioClientBoss.process(NioClientBoss.java:79)
at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:318)
at org.jboss.netty.channel.socket.nio.NioClientBoss.run(NioClientBoss.java:42)
at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)