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應用程式無法啟動，聲稱“連接埠已在使用中”，但事實並非如此

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應用程式無法啟動，聲稱“連接埠已在使用中”，但事實並非如此

應用程式（apache storm）無法啟動拋出以下異常

2022-04-12 04:56:13.997 o.a.s.d.u.UIServer main [ERROR] Exception in UlServer 
java.io.I0Exception: Failed to bind to 0.0.0.0/0.0.0.0:8888 
at org.eclipsejettyserver.ServerConnector.openAcceptChannel(ServerConnectorjava346) ~[jetty-server-9.4.14.v20181114jan9.4.14.v20181114] 
at org.eclipsejetty.server.ServerConnector.open(ServerConnectorjava:308) ~[jetty-server-9.4.14.v20181114.jar:9.4.14.v20181114] 
at org.eclipsejetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnectorjava:80) ~[jetty-server-9.4.14.v20181114jar:9.4.14.v20181114] 
at org.eclipsejetty.server.ServerConnector.doStart(ServerConnectorjava:236) ~[jetty-server-9.4.14.v20181114jar.9.4.14-v20181114] 
at org.eclipsejetty.util.component.AbstractUfeCycle.start(AbstractlifeCyclejava:68) ~[jetty-util-9.4.14.v20181114jan9.4.14.v20181114] 
at org.eclipsejetty.server.Server.doStart(Serverjava:394) ~[jetty-server-9.4.14.v20181114.jar9.4.14.v20181114) 
at org.eclipsejetty.util.component.AbstractLifeCycle.start(AbstractlifeCyclejava:68) ~[jetty-util-9.4.14.v20181114jar.9.4.14.v20181114] 
at org.apache.storm.daemon.ui.U1Server.main(U1Serverjaval 79) [storm-webapp-2.2.0jar:2.2.0] 
Caused by: java.net-BindException: Address already in use 
at sun.nio.ch.Net.bindO(Native Method) ~[?:?] 
at sumnio.ch.Net.bind(Netjava:455) ~[?:?] 
at sun.nio.ch.Netbind(Netjava:447) ~[?:?] 
at sun.nio.chServerSocketChannelImpl.bind(ServerSocketChannellmpljava:227) ~[?:?] 
at sumnio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptorjava:80) ~[?:?] 
at org.eclipsejetty.server.ServerConnector.openAcceptChannel(ServerConnectorjava:342) ~[jetty-server-9.4.14.v20181114jan9.4.14.v20181114] 
... 7 more

雖然該連接埠是免費的，但我使用了多種工具（telnet、nc等netstat）來確保這一點。在另一台有另一個應用程式的伺服器上也發現了相同的行為，但JMV也基於
作業系統：RHEL 7.9

爪哇：11.0.12

答案1

嘗試檢查傳輸控制協定和UDP協定聽眾也是

netstat -plantu | grep 8888

您可以檢查已開啟的連接埠拉索夫也

lsof -i -P -n

輸出範例

root@machine:~# lsof -i -P -n
COMMAND     PID        USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
memcached   471    memcache   26u  IPv4   18741      0t0  TCP 127.0.0.1:11211 (LISTEN)
vsftpd      511        root    3u  IPv6   18621      0t0  TCP *:21 (LISTEN)
sshd        516        root    3u  IPv4   16971      0t0  TCP *:22 (LISTEN)
sshd        516        root    4u  IPv6   16980      0t0  TCP *:22 (LISTEN)
mysqld      831       mysql   21u  IPv6   20656      0t0  TCP *:33060 (LISTEN)
mysqld      831       mysql   26u  IPv4   17309      0t0  TCP *:3306 (LISTEN)
apache2   32378        root    4u  IPv6 4392606      0t0  TCP *:80 (LISTEN)
apache2   32378        root    6u  IPv6 4392610      0t0  TCP *:443 (LISTEN)
apache2   32396    www-data    4u  IPv6 4392606      0t0  TCP *:80 (LISTEN)
apache2   32396    www-data    6u  IPv6 4392610      0t0  TCP *:443 (LISTEN)
apache2   32397    www-data    4u  IPv6 4392606      0t0  TCP *:80 (LISTEN)
apache2   32397    www-data    6u  IPv6 4392610      0t0  TCP *:443 (LISTEN)

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