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?
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.
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.
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.
kill $(ps -aef | grep java | grep apache | awk '{print $2}')
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
netstat -ano
and check if any other processes are using the conflicted ports.Change Tomcat Ports in Eclipse
Kill java.exe and javaw
See my other answer for Eclipse not connecting to Internet (https://stackoverflow.com/a/37246087/4212710).
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.
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.
How to kill a windows service using PID -
netstat -ano
taskkill /f /pid 5760
Thanks
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:
Thanks!
Sometimes if the ports are not freed even after attempting shutdown.bat what @BalusC suggested,you can kill the javaw process. Do following steps :
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.
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!
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.
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.
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.
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
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
On Eclipse make a raw delete of Tomcat configuration folder under project "Servers". I tried it as last hope and it worked.
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!
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
)
Easiest solution
Single line command for killing multiple ports:
kill $(lsof -t -i:8005,8080,8009) // 8005, 8080 and 8009 are the ports to be freed.
In windows OS do right click on task bar-->start task manager-->process then check java.exe or javaw is running if it is running,then click on it and do end process then restart your tom cat server.
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
All of above do not work for me.
What I found was click the Details button.
Then following the Multiple contexts with the same path error running web service in Eclipse using Tomcat
Removed the duplicated line then I got an another error.
The server cannot be started because one or more of the ports are invalid. Open the server editor and correct the invalid ports.
Following Can't start tomcatv9.0 in Eclipse
Then it works.
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".
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:
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:
That's all.
Macbook solution:
Step 1: stop the server running Java :
Open Activity Monitor by going to Applications > Utilities > Activity Monitor. Or simple press CMD + Spacebar and start typing Activity Monitor. Look for process running Java and kill it by giving the following command in Terminal
kill -STOP <PID>
where PID is the process ID of the Java process as displayed in the Activity Monitor. Do it a couple of times and close and reopen Activity Monitor to check Java isn't running.
Step 2: change the port :
right-click on the server in Eclipse and click 'Open'. Change port number from 8080 to 8081 or something greater in value.
This should hopefully start your server.
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"
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.
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.
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.
Source: Stackoverflow.com