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SpringBoot2.2.1 deployment on cloud server always cannot run report error "Web server failed to start. Port 9090 was already in use."

I am new to SpringBoot and java.I have build a SpringBoot2 app,I want to deploy it in a cloud server. I have specify that port in Application-online.properties like
server.port=9090 but when I use IDEA MAVEN clean and package command to build a jar then copy to cloud server.
I use
nohup java -jar -Dserver.port=9090 -Dspring.profiles.active=online ./mall-0.0.1-SNAPSHOT.jar > /root/imooc_mall/mall.log 2>&1
then quickly the program exit. the mall.log report :
***************************
APPLICATION FAILED TO START
***************************
Description:
Web server failed to start. Port 9090 was already in use.
Action:
Identify and stop the process that's listening on port 9090 or configure this application to listen on another port.
[06:25 23:31:32.595] [INFO] [org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor] - Shutting down ExecutorService 'applicationTaskExecutor'
Noticably, 9090 is the second port I use, before that I use 8081 meet same error. Just like whatever I use any port,it always in use. And I have confirm that the 9090 and 8081 is not in use use netstat -tulpn and lsof -i :8081/9090 . I don't know what's the problem.Hope someone can give some ideals.Thanks advance!
The Environment are Centos7 and SpringBoot2.2.1, Java1.8,and Tomcat is SpringBoot in-build version
Another thing is that I have successed in starting the springboot app at first,But I use kill -9 to stop the program. After that the above errors occurs and never success .I wonder if that have any bad effect on the question.
But I am sure the port is not in use.

I still use SpringBoot 2.2.1.But not package it with built-in Tomcat.Instead, I install Tomcat server on the server. And Packaging SpringBoot application as war package. And I finally successed in running the application.

Moskito inspect monitoring tool integration with Java web application issue

I have an issue setting up an rmi port on Apache Tomcat server
(set JAVA_OPTS=%JAVA_OPTS% -DlocalRmiRegistryPort=9401)
Here are the steps i have done and getting the error respectively.
Issue with MoSKito tool while configuring RMI port on Tomcat
I am also tried to configure MoSkito inspect on my java web application. as part of it, i have been trying to make RMI port using "set JAVA_OPTS=%JAVA_OPTS% -DlocalRmiRegistryPort=9401" on catalina.bat. there is no error as such but 9401 is not getting connected.
Steps followed:
1) My OS is Windows 7
2) I have installed Apache Tomcat v7
3) I have downloaded Moskito inspect .war file from http://www.moskito.org/download.html and
4) Installed Moskito inspect on my tomcat server, the MoSKito inspect web UI is loading good.
5) I have created a sample java web application and deployed on same tomcat server. and web application also working good.
6) Now i have taken step to configure RMI port 9041 using below command on \bin\catalina.bat file(since i am on Windows OS).
I have put the below command on top of the file in \bin\catalina.bat
set JAVA_OPTS=%JAVA_OPTS% -DlocalRmiRegistryPort=9401
7) and started tomcat server, and then opened Moskito application on browser and gone to Quick Connect option on and given localhost and rmi port 9401 to call remote invocation.
Its failed.... its always giving error as MoSKito encountered an error:
Cannot connect to localhost#localhost:9401, due: Can not resolve manually set reference. Server at localhost, port: 9401 is down or not properly configured
[net.anotheria.moskito.webui.util.APILookupUtility.findRemote(APILookupUtility.java:168), net.anotheria.moskito.webui.util.APILookupUtility.findRemote(APILookupUtility.java:142), net.anotheria.moskito.webui.util.APILookupUtility.getAdditionalFunctionalityAPI(APILookupUtility.java:113),
Q1: How to set -DlocalRmiRegistryPort=9401 on tomcat on Windows OS.
Q2: Once we set port, how to ensure port is set properly and its up and ready state for connection.
Q3: Once port is set properly, then how to set / configure specified java web application needs to be configured for MoSKito, since we could have more than one java web application on same tomcat server.
Please guide me, thank you :)

in order to be able to connect to a MoSKito monitored application you have to enable an agent that binds itself to port 9401 and answers your replies. To do so, you have to add a dependency to your pom (if you are using maven):
<!-- Enabling MoSKito Inspect Embedded -->
<dependency>
<groupId>net.anotheria</groupId>
<artifactId>moskito-inspect-remote</artifactId>
<version>${moskito.version}</version>
</dependency>
Please keep in mind that the current MoSKito version is 2.5.4
If you are using a servlet 3.0 compatible container (tomcat 7, jboss wildfly) you are done. If you are using an older container you may need to add following to your web.xml:
<listener>
<listener-class>net.anotheria.moskito.webui.embedded.StartMoSKitoInspectBackendForRemoteListener</listener-class>
</listener>
If you are using no container at all, you can start it manually:
net.anotheria.moskito.webui.embedded.StartMoSKitoInspectBackendForRemote.startMoSKitoInspectBackend()
Now for you questions:
Q1: via catalina.bat. You were doing it correctly.
Q2: if the agent is configured everything will work correctly.
Q3: You may want to check out step by step guide here:
http://blog.anotheria.net/msk/the-complete-moskito-integration-guide-step-1/
Regards
Leon

Glassfish: There is no cluster named localhost in this domain

I am new to glassfish and java ee programming. I am using Netbeans. When I try to deploy my web application to glassfish server, my project output shows
The module has not been deployed.
And in the glassfish server log:
WARNING: There is no cluster named localhost in this domain.
SEVERE: There is no instance named localhost in this domain.
Any comment would be helpful. thanks guys.

In glassfish/domains folder is there a domain called domain1 (default name). if not you need to create a new domain. if there is one then make sure under glassfish/domains/domain1 a file domain.xml points to all instances of localhost

Remote debugging on Tomcat with Eclipse

I'm trying to initiate a remote debugging session on my PC with Eclipse & Tomcat.
I managed to run tomcat (not through eclipse) with the following params:
set JPDA_TRANSPORT=dt_socket
set JPDA_ADDRESS=5050
cataline jpda start
The server starts ok, this is the outcome:
Using CATALINA_BASE: "C:\Java\Tomcat"
Using CATALINA_HOME: "C:\Java\Tomcat"
Using CATALINA_TMPDIR: "C:\Java\Tomcat\temp"
Using JRE_HOME: "C:\Java\jdk1.6.0_27"
Using CLASSPATH: ...
Listening for transport dt_socket at address: 5050
...
...
INFO: Server startup in 12502 ms
Now, I opened eclipse, and loaded the relevant project.
I set a new debugging configuration using Remote Java Application with localhost and the right port. however when I run it, I get this error message:
Failed to connect to remote VM. Connection refused.
Connection refused: connect
Can't really understand where is the problem. this is all local inside the PC, so there shouldn't be any firewalls involved, can someone think of something ?

Found the solution. apparently the connection was made, but Eclipse & Tomcat don'tt show any notification or status regarding it.
Then, when you initiate the connection again, you get the error because you're already connected.
I think that a small notice, either from Eclipse, or from Tomcat would be nice.

Try adding the following debug options directly to the JVM startup by directly modifying the catalina startup script
-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5050

There could be problems when there are code mismatches between eclipse and tomcat. So when it matches the error will disappear

You can configure it in remote java application section in debug configuration.
For more details you can refer this link

Unable to deploy in Netbeans 6.7.1 and Glassfish v2.1.1

I am trying to deploy a simple WebService in Netbeans 6.7.1 and Glassfish v2.1.1 and am getting the following error. I am using GlassfishESBv2.2 and windows 7 machine. I have tried googling and implemented things as shown in
http://forums.netbeans.org/topic10055-0-asc-0.html . Still unable to deploy. Though the message says that application server is not started, from the Server tab , I am able to see a message which indicates Glassfish has started.Also , doing a netstat after trying to deploy returns this, which means that Glassfish is running.
C:>netstat -an | findstr "4848"
TCP 0.0.0.0:4848 0.0.0.0:0 LISTENING
I have been trying real hard to get this resolved. Any help is highly appreciated.
Error Message :
The Sun Java System Application Server could not start.
More information about the cause is in the Server log file.
Possible reasons include:
- IDE timeout: refresh the server node to see if it's running now.
- Port conflicts. (use netstat -a to detect possible port numbers already used by the operating system.)
- Incorrect server configuration (domain.xml to be corrected manually)
- Corrupted Deployed Applications preventing the server to start.(This can be seen in the server.log file. In this case, domain.xml needs to be modified).
- Invalid installation location.
C:\Users\xyz\Documents\NetBeansProjects\HWebService\nbproject\build-impl.xml:564: Deployment error:
The Sun Java System Application Server could not start.
More information about the cause is in the Server log file.
Possible reasons include:
- IDE timeout: refresh the server node to see if it's running now.
- Port conflicts. (use netstat -a to detect possible port numbers already used by the operating system.)
- Incorrect server configuration (domain.xml to be corrected manually)
- Corrupted Deployed Applications preventing the server to start.(This can be seen in the server.log file. In this case, domain.xml needs to be modified).
- Invalid installation location.
See the server log for details.
BUILD FAILED (total time: 29 seconds)

I've described the solution please visit here...
http://forums.netbeans.org/post-65058.html