ERROR - org.apache.flume.source.NetcatSource.start(NetcatSource.java:169)_unable to bind to socket. exception follows.-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_44584876/article/details/110520047

博客主要讲述了启动flume时出现报错的情况，报错原因是端口号被占用。解决方法为杀死进程94865后再次启动。此外，还给出了可能出现其他报错原因的参考链接。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

报错信息：

启动 flume 时报错

2020-11-17 07:10:20,430 (lifecycleSupervisor-1-2) [ERROR - org.apache.flume.source.NetcatSource.start(NetcatSource.java:169)] Unable to bind to socket. Exception follows.
java.net.BindException: 地址已在使用
        at sun.nio.ch.Net.listen(Native Method)
        at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:224)
        at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
        at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:67)
        at org.apache.flume.source.NetcatSource.start(NetcatSource.java:164)
        at org.apache.flume.source.EventDrivenSourceRunner.start(EventDrivenSourceRunner.java:44)
        at org.apache.flume.lifecycle.LifecycleSupervisor$MonitorRunnable.run(LifecycleSupervisor.java:249)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
2020-11-17 07:10:20,431 (lifecycleSupervisor-1-2) [INFO - org.apache.flume.source.NetcatSource.stop(NetcatSource.java:197)] Source stopping
2020-11-17 07:10:20,431 (lifecycleSupervisor-1-2) [ERROR - org.apache.flume.lifecycle.LifecycleSupervisor$MonitorRunnable.run(LifecycleSupervisor.java:251)] Unable to start EventDrivenSourceRunner: { source:org.apache.flume.source.NetcatSource{name:r1,state:STOP} } - Exception follows.
org.apache.flume.FlumeException: java.net.BindException: 地址已在使用
        at org.apache.flume.source.NetcatSource.start(NetcatSource.java:171)
        at org.apache.flume.source.EventDrivenSourceRunner.start(EventDrivenSourceRunner.java:44)
        at org.apache.flume.lifecycle.LifecycleSupervisor$MonitorRunnable.run(LifecycleSupervisor.java:249)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.BindException: 地址已在使用
        at sun.nio.ch.Net.listen(Native Method)
        at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:224)
        at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
        at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:67)
        at org.apache.flume.source.NetcatSource.start(NetcatSource.java:164)
        ... 9 more

报错原因：

端口号44444被占用

在这里插入图片描述

解决方法：

杀死进程 94865

[root@node01 flume]# netstat -alnp | grep 44444
tcp        0      0 0.0.0.0:44444               0.0.0.0:*                   LISTEN      94865/nc            
tcp        0      0 192.168.10.131:44444        192.168.10.132:60154        ESTABLISHED 94865/nc            
[root@node01 flume]# kill -9 94865
[root@node01 flume]# netstat -alnp | grep 44444
tcp        0      0 192.168.10.131:44444        192.168.10.132:60154        FIN_WAIT2   -

再次启动即可

可能还会出现报错的原因：

https://blog.youkuaiyun.com/weixin_44584876/article/details/110424816
https://blog.youkuaiyun.com/weixin_44584876/article/details/110422801