Unable to create socket at port 4560 for localhost

[AsharSi]

While starting the CloudStack environment, I'm getting an issue after starting the management server with command

mvn -pl :cloud-client-ui jetty:run

Here below is the error log details for socket not created

2025-03-02 05:09:28,196 main ERROR TcpSocketManager (TCP:localhost:4560) caught exception and will continue: java.io.IOException: Unable to create socket for localhost at port 4560 using ip address 127.0.0.1 and port 4560
	at org.apache.logging.log4j.core.net.TcpSocketManager$TcpSocketManagerFactory.createSocket(TcpSocketManager.java:509)
	at org.apache.logging.log4j.core.net.TcpSocketManager$TcpSocketManagerFactory.createManager(TcpSocketManager.java:478)
	at org.apache.logging.log4j.core.net.TcpSocketManager$TcpSocketManagerFactory.createManager(TcpSocketManager.java:459)
	at org.apache.logging.log4j.core.appender.AbstractManager.getManager(AbstractManager.java:144)
	at org.apache.logging.log4j.core.appender.OutputStreamManager.getManager(OutputStreamManager.java:100)
	at org.apache.logging.log4j.core.net.TcpSocketManager.getSocketManager(TcpSocketManager.java:202)
	at org.apache.logging.log4j.core.appender.SocketAppender.createSocketManager(SocketAppender.java:497)
	at org.apache.logging.log4j.core.appender.SyslogAppender$Builder.build(SyslogAppender.java:151)
	at org.apache.logging.log4j.core.appender.SyslogAppender$Builder.build(SyslogAppender.java:50)

	... 86 more

2025-03-02 05:09:28,207 main ERROR appenders Appenders has no parameter that matches element properties

in same log similar error log is shown

2025-03-02 05:09:48,325 main ERROR An exception occurred processing Appender SYSLOG org.apache.logging.log4j.core.appender.AppenderLoggingException: Error writing to TCP:localhost:4560: socket not available
	at org.apache.logging.log4j.core.net.TcpSocketManager.write(TcpSocketManager.java:214)
	at org.apache.logging.log4j.core.appender.OutputStreamManager.write(OutputStreamManager.java:190)
	at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.writeByteArrayToManager(AbstractOutputStreamAppender.java:224)
	at org.apache.logging.log4j.core.appender.SocketAppender.directEncodeEvent(SocketAppender.java:513)
	at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.tryAppend(AbstractOutputStreamAppender.java:208)
	at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(AbstractOutputStreamAppender.java:199)
	at org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:161)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:134)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:125)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:89)
	at org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:683)
	at org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:641)
	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:624)
	at org.apache.logging.log4j.core.config.LoggerConfig.logParent(LoggerConfig.java:674)
	at org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:643)
	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:624)
	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:560)
	at org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:82)
	at org.apache.logging.log4j.core.Logger.log(Logger.java:162)

In the end I got Jetty Server started with same error multiple times

INFO] Initializing Spring root WebApplicationContext
[INFO] Started o.e.j.m.p.JettyWebAppContext@6af447b6{/client,file:///home/asharsi/programming/cloudstack/client/target/classes/META-INF/webapp/,AVAILABLE}{file:///home/asharsi/programming/cloudstack/client/target/classes/META-INF/webapp/}
[INFO] Started ServerConnector@62d4a67e{HTTP/1.1, (http/1.1)}{0.0.0.0:8080}
[INFO] Started @43379ms
[INFO] Started Jetty Server
2025-03-02 05:10:00,324 Cluster-Notification-1 ERROR Unable to write to stream TCP:localhost:4560 for appender SYSLOG org.apache.logging.log4j.core.appender.AppenderLoggingException: Error writing to TCP:localhost:4560: socket not available
	at org.apache.logging.log4j.core.net.TcpSocketManager.write(TcpSocketManager.java:214)
	at org.apache.logging.log4j.core.appender.OutputStreamManager.write(OutputStreamManager.java:190)
	at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.writeByteArrayToManager(AbstractOutputStreamAppender.java:224)
	at org.apache.logging.log4j.core.appender.SocketAppender.directEncodeEvent(SocketAppender.java:513)
	at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.tryAppend(AbstractOutputStreamAppender.java:208)
	at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(AbstractOutputStreamAppender.java:199)
	at org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:161)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:134)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:125)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:89)
	at org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:683)
	at org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:641)
	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:624)
	at org.apache.logging.log4j.core.config.LoggerConfig.logParent(LoggerConfig.java:674)
	at org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:643)
	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:624)
	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:560)
	at org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:82)
	at org.apache.logging.log4j.core.Logger.log(Logger.java:162)

I visited http://localhost:8080 and got this response

During the Installation I followed the INSTALL.md guide for setting up the project.

Any idea what could be causing this issue or how to debug further?

[DaanHoogland]

@AsharSi , can you reach http://localhost:8080/client ?

You can check your logging configuration to see why the port 4560 is being opened (do you have a rogue log4j config in your path?

[AsharSi]

The management server starts successfully on http://localhost:8080/client, and I was able to build the UI.

From the logs, it seems socket is trying to internally create on localhost:4560 for logging, but the socket is not being created

I verified that, when the management server starts, port 4560 remains inactive. In case if system is blocking, used this command to allow any connections

sudo ufw allow 4560/tcp

but this did not resolve the issue.

Is there a configuration setting in log4j-cloud.xml that I should check?

[DaanHoogland]

Yes @AsharSi , the logging library is trying to write logging to that port.

two solutions:

1. make sure there is a syslog listening on that port
2. remove the syslog appender "SYSLOG" and "ALERTSYSLOG" from the configuration.

neither is necessary for a functioning system.