Assume the following setup:
MachineA: userA#
MachineB: userB#
I want to run my JAR on machine B:
When I run it like this:
java -jar myApplication.jar > /dev/null 2>&1 &
All goes well, and logs are being generated next to my jar file.
When I run it via ssh from machine A:
ssh userB#<ipB> "java -jar myApplication.jar > /dev/null 2>&1 &"
Application starts on machine B, but no log files are being generated.
Btw, the jar is a regular spring boot application using logback for logging.
Your application is being killed before it even has a chance to create a log file. It will probably work if you remove the final ampersand from your command:
ssh userB#<ipB> "java -jar myApplication.jar > /dev/null 2>&1"
With the ampersand present, the command is placed into the background. As the shell created by the ssh process has no foreground jobs it immediately closes the connection. When the connection is closed machine B kills all the command's child processes, including the Java application.
You could also use nohup to detach the java process, so that it doesn't get killed when the ssh connection closes. This has the added benefit that the application will continue to run even if your connection is interrupted:
ssh userB#<ipB> "nohup java -jar myApplication.jar > /dev/null 2>&1 < /dev/null &"
You might also find it helpful to check out screen and tmux.
OK, the application was running and the logs were being generated, just not where I had expected.
In myApplication configuration file, there was a property
logging.file=logs/myApplication.log
When I was starting my app via SSH, the folder from which was executed was /home/userB and not /home/userB/deployment/build.
For that reason, logs were not being generated in the same folder where the app was, but in userB's home folder.
The fix was to cd to specific folder, before starting the app.
So I'm deploying my Spring Boot application on an Ubuntu LTS Server. It is built with maven and running with embedded Tomcat.
I'm still new to the deployment process, what I did was:
Log into server via ssh
use scp to upload my_application.zip
unzip it in ssh
java -jar my_application.jar
Now all of that works perfectly fine and I've been using it like that for quiet some time. Now I have to make the Application to stay online and available after logging out of the shell.
I have read some documentation about running processes in background on Linux and I've tried it with nohup java -jar myApplication.jar &, with the screen command and with bg. All of them worked fine while I'm logged into the ssh.
Here comes my problem:
As soon as I end the ssh session the Web App is still available (so the process clearly didn't stop) but it just looks & behaves really weird.
CSS is not applied, JS does not work etc.
My guess would be that some paths or file system accesses are messed up, but I have no idea at all how that could origin from the ssh session.
(When I log back into ssh everything is working fine again)
Would be great if someone has a clue here
If your server has encrypted home directory, it will get re-encrypted once you log out and therefore your script will stop working. It does not have a lot of sense to have encrypted homes on servers so you can disable it.
Or just run the script from different directory and avoid working with files under home directory.
I think you should use systemd for this case.
Also You can add new system user for your app.
You can find more information here:
Spring Boot: 59.2.2 Installation as a systemd service
Ubuntu Wiki: Systemd For UpstartUsers
For example:
Create file myunit.service
[Unit]
Description=MySpringService
After=syslog.target
After=network.target
After=mysql.service
[Service]
Type=forking
PIDFile=/work/www/myunit/shared/tmp/pids/service.pid
WorkingDirectory=/work/www/myunit/current
User=myunit
Group=myunit
Environment=RACK_ENV=production
OOMScoreAdjust=-1000
ExecStart=/usr/local/bin/bundle exec service -C /work/www/myunit/shared/config/service.rb --daemon
ExecStop=/usr/local/bin/bundle exec service -S /work/www/myunit/shared/tmp/pids/service.state stop
ExecReload=/usr/local/bin/bundle exec service -S /work/www/myunit/shared/tmp/pids/service.state restart
TimeoutSec=300
[Install]
WantedBy=multi-user.target
Copy file to /etc/systemd/system/
Run:
systemctl enable myunit
systemctl start myunit
I'm getting the following error when I try to run a simple JSP program on Tomcat in Eclipse.
Several ports (8005, 8080, 8009) required by Tomcat v6.0 Server at localhost are already in use. The server may already be running in another process, or a system process may be using the port. To start this server you will need to stop the other process or change the port number(s).
How is this caused and how can I solve it?
You've another instance of Tomcat already running. You can confirm this by going to http://localhost:8080 in your webbrowser and check if you get the Tomcat default home page or a Tomcat-specific 404 error page. Both are equally valid evidence that Tomcat runs fine; if it didn't, then you would have gotten a browser specific HTTP connection timeout error message.
You need to shutdown it. Go to /bin subfolder of the Tomcat installation folder and execute the shutdown.bat (Windows) or shutdown.sh (Unix) script. If in vain, close Eclipse and then open the task manager and kill all java and/or javaw processes.
Or if you actually installed it as a Windows service for some reason (this is namely intented for production and is unhelpful when you're just developing), open the services manager (Start > Run > services.msc) and stop the Tomcat service. If necessary, uninstall the Windows service altogether. For development, just the ZIP file is sufficient.
Or if your actual intent is to run two instances of Tomcat simultaneously, then you have to configure the second instance to listen on different ports. Consult the Tomcat documentation for more detail.
kill $(ps -aef | grep java | grep apache | awk '{print $2}')
no need to restart Eclipse
if you get the above error, just enter this line in terminal
again start the tomcat in Eclipse.
works only in Linux based system ( Ubuntu ..etc )
If you are running on windows try this in the command line prompt:
netstat -ano
This will show all ports in use and the process id PID # of the process that is using that port.
Then Ctrl+Alt+Del and open Task Manager to see which process is that.
You can then choose either to close/stop it or configure your server to use another port.
To check if the new choosen port (let's say 8010) is available do this:
netstat -ano | grep 8010
If it does not return any lines then you are fine.
To change the port go to the Server view, open server.xml and change the port there.
Mine has this entry:
Connector port="8010" protocol="AJP/1.3" redirectPort="8443"
If you are on mac environment, here is what I did.
Find the process id running on this port from terminal, eg, 8080:
lsof -i :8080
and kill it:
kill -9 <PID>
Example:
You may see following result:
MacSys:bin krunal.$ lsof -i :8080
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 21347 krunal 52u IPv6 XXX 0t0 TCP *:http-xxx (LISTEN)
and kill it: (kill -9 21347)
Steps to free port which is already used to run tomcat server in Eclipse
For example , suppose 8080 port is used , we need to make free 8080 to run tomcat
Step 1:
C:\Users\username>netstat -o -n -a | findstr 0.0:8080
TCP 0.0.0.0:3000 0.0.0.0:0 LISTENING 3116
Now , we can see that LISTENING port is 3116 for 8080 ,
We need to kill 3116 now
Step 2:-
C:\Users\username>taskkill /F /PID 3116
Step 3:
Go to Eclipse and start Server , it will run
If you use Eclipse then double click on servers and double click on tomcat server then one file will open. In that file change HTTP port to some other port number and save(Ctrl+S) then again start the server.
If Eclipse says
Several ports (8005, 8080, 8009) required by Tomcat v6.0 Server at localhost are already in use
This error comes because tomcat may be running in background so first stop that server..follow the below details.
Solution is:
Open the "console" view (window->show view->Console)
Then stop the tomcat server.
Then open the "server" view and start the server it will work.
Thanks!
I have no another instance of Tomcat running ad no other process using "Tomcat port" (in my case, the 8088 port).
Eclipse send the same message on starting Tomcat:
....The server may already be running in another process, or a system process may be using the port. To start this server you will need to stop the other process or change the port number(s).
I solve the problem in this way:
go to bin of tomcat by prompt
launch startup.bat
launch shutdown.bat
start tomcat by Eclipse
What I did after reading all the suggested answer and as I know my port was already in use. I double clicked on Tomcat under the Servers tab in eclipse and it opened overview information and then find port information. Just changed conflicting port as mine was 8009 port (error mentioned during starting the server). I have changed it to 8008 and it works fine. Give a try if the changed port would not be in use server will start.
Step 1: netstat -a -o -n and it will bring up a network list,search for the local address like 127.0.0.1:8080 and note the PID (eq 3624)
C:\>netstat -a -o -n
Step2 : taskkill /F /PID 3624 . Run this command to kill that process.
C:\>taskkill /F /PID 3624
link to post
On Windows use command for stopping the already running tomcat instance and try running it again in eclipse, it may work.
net stop tomcat7
Or you can change the port in server's XML if you just want to run on some other ports.
Easy way to solve your problem:
The server may already be running in another process, or a system process may be using the port. In order to kill that port, do the following:
1) Download TCPView(only 285kb) from following link.
http://technet.microsoft.com/en-in/sysinternals/bb897437.aspx
2) Extract folder and start TCPView application.
3) Right click on java.exe(because 8009,8005 ports are commonly used by java process) and select End Process option.
this would stop another process easily..
NOTE: Running TOMCATPATH/bin/shutdown.bat may not shutdown Tomcat when it contains some demon or unmanaged
threads. In such cases TCPView works fine without any issues.
I checked all the answers but informing only to kill PID.
In case if you have terminal access shared by all it will not help or maybe you do not have permission to kill PID.
In this case what you can do is:
Double click on server
Go to Overview and change ports in Ports like this:
If you are in Java EE prospective in Eclipse and trying to start the Tomcat Server in Eclipse in debug mode, then you will get such errors. You must switch to debug prospective in Eclipse. I have solved my problem like this.
Sometimes if the ports are not freed even after attempting shutdown.bat what #BalusC suggested,you can kill the javaw process. Do following steps :
Click on Start Menu and open "Windows powershell"
Right click before opening and select "Run as administrator"
Enter command ps. You may see a image as follows :
See the process number of process "javaw".The process number is the rightmost number in the columns, I have highlighted in the image process number of javaw for example.
Enter command kill . javaw is killed and now you must be able to run the program.
Here's one more option to try if none of the efforts above helped. You might be using Eclipse from a Shared Drive (for eg, H:). If so, move/copy it the entire Eclipse directory to C: and try again.
My Eclipse could not open ports for Tomcat server (with the above error), nor even connect to internet. I also tried another Tomcat plugin (Sysdeo) which failed to open the ports too.
These are the options I tried:
Check and Kill Other Tomcat Instances
In command prompt, netstat -ano and check if any other processes are using the conflicted ports.
Find the PID and kill it
Try starting the server again.
Change Tomcat Ports in Eclipse
In Eclipse Server tab, double click the Tomcat instance. This will open the configuration tab.
Under Ports, change the port numbers. (for eg, 18080).
Kill java.exe and javaw
In Task Manager, find and kill java.exe and javaw (see https://stackoverflow.com/a/25334782/4212710 and https://stackoverflow.com/a/26136890/4212710)
Try starting the server again.
See my other answer for Eclipse not connecting to Internet (https://stackoverflow.com/a/37246087/4212710).
For windows users:
Go to Task Manager directly with CTRL+SHIFT+ESC key combination.
Kill the "java.exe" processes by right clicking and selecting "End Task".
The simpler fix that works for me is deleting my current deployed webapps from tomcat through the "Server" tab. Once I remove them the problem goes away. Simply re-deploy your project by going on Run As > Run on Server.
The problem often arises when Apache Tomcat fails to terminate, properly, even though a shutdown instruction was sent. In my case, using Tomcat 8, this happens with annoying regularity. Luckily, you can use Windows PowerShell and the netstat command to create a simple script to kill the process.
The following PowerShell script will parse the output from netstat to find any process that is listening on 127.0.0.1:8005, extract its PID and then kill that process:
netstat -a -o -n `
| select -skip 4 `
| % {$a = $_ -split ' {3,}'; New-Object 'PSObject' -Property #{Original=$_;Fields=$a}} `
| ? {$_.Fields[1] -match '127\.0\.0\.1\:8005$'} `
| % {Write-Host "Killing PID" $_.Fields[4] "..."; taskkill /F /PID $_.Fields[4] }
If your server.xml configures Tomcat to use a different port or IP, edit the regular expression on the script's fourth line accordingly.
Finally, I should point out that the situation is better on Linux because you can instruct Tomcat to save its PID to a file at startup-time and use a switch to force the shutdown, later - the shutdown script for 'nix systems already features the ability to kill the process and the sleuth-work with netstat is not required.
If the above issue occurs in Windows 7 or 10 based OS, the problem occurs because Tomcat is running as Windows Service. To stop Tomcat running as Windows Services, Open Windows Control Panel. Find the service "Apache Tomcat" and Stop it.
The Another way is to kill the process running on port 8080 using cmd.
Open cmd running it as administrator.
C:\users\username>netstat -o -n -a|findstr 0.0:8080
TCP 0.0.0.0:8080 0.0.0.0:0 LISTENING 2160.
The above 2160 is process id of process running on port 8080 and kill that process using the following command
C:\users\username>taskkill /F /PID 2160
Go to IDE and start Server, it will run
It may be because you are not stopping your tomcat service properly. To do that, Open your task manager there you can see a javaw.exe service. First stop that service. Now restart your tomcat it works fine.
In my case, it was giving me the error: Port 8005 required by Tomcat v8.0 Server at localhost is already in use
I changed 8005 port in apache-tomcat-8.0.39\conf\server.xml but changes were not getting reflected. Then I did these changes from eclipse. by double clicking server and modifying the port from 8005 to 8006 and it works.
Before putting 8006 I checked in windows shell if this port is available or not. By executing following command:
netstat -a -o -n | findstr 8006
I face the same problem and after searching the answer as shown below:
1. open Monitor Tomcat as shown below:
Simply press stop as shown in below picure:
Finally it works with me after many trials and suggested solutions.
Best Regards,
Kerelos Mikhail
On Eclipse make a raw delete of Tomcat configuration folder under project "Servers".
I tried it as last hope and it worked.
In case of windows, I experienced a new stuff...
stopping tomcat from /bin folder will immediately not releasing the port 8080. It takes around 5-10 mins to release the port. After 10 mins again if i try to run my project
Run-> Run on server .. it allows to run.
I'm unsure whether my understanding is correct!
Refer to the following blog "how to kill tomcat without have to restart your computer"
http://stanicblog.blogspot.fr/2012/01/how-to-kill-apache-tomcat-without.html
Hope this will help someone in the future.
It occurs when others in the project are also using the same port numbers as you are using!
double click tomcat server, change port numbers to anything 8585 or whatever. The code will now begin to run!
How to kill a windows service using PID -
open command prompt and type netstat -ano
find the PID of the ports which are in used, in this case, it will be 8080, 8005,8009. Let's say PID of these ports are 5760.
Now Type taskkill /f /pid 5760
it will close the PID and ports will be available for use. Now you can start tomcat as normal by Windows services or by eclipse itself.
Thanks
kill a Windows service that's stuck on stopping or starting
Several ports (8005, 8080, 8009) required by Tomcat vX.X Server at localhost are already in use
To check whether another instance of Tomcat already running or some other process is using the ports you can use:
netstat -b -a in command prompt for windows. This lists the ports in use and gives you the executable that's using each one. You need to be in the admin group to do this.
You might get something like this:
TCP 192.168.0.1:8009 192.168.0.1:0 LISTENING 196 [Tomcat7.exe]
TCP 192.168.0.1:8080 192.168.0.1:0 LISTENING 196 [Tomcat7.exe]
TCP 192.168.0.1:8005 192.168.0.1:0 LISTENING 196 [Tomcat7.exe]
Open task manager Ctrl+Shift+Esc, and kill Tomcat7.exe or any other process using these ports.
Your Tomcat is probably running already. That's why you have got an error. I've had the same problem before. I solved it very simply:
Restart your computer
Open Eclipse
Run your Tomcat
That's all.