I tried almost all internet and stackoverflow tips and no one didn't help me to open ports in Weblogic Server. My Weblogic server starts as windows service in windows server 2008 r2. In config.xml on the path
..user_projects\domains\%Any_app%\config\config.xml i added this string for each server in arguments -
<server-start>
<arguments>... -Xdebug -Xnoagent -Xrunjdwp:transport=dt_socket,address=1777,server=y,suspend=n ...
</arguments>
</server-start>
and i always check in cmd with netstate -a or telnet this port but it doesn't appear and doesn't work.
For the first, check your firewall - ensure that port is open.
Second, check config.xml again, then in administration console go to
Servers - Configuration - Listen Port - made modifications if needed.
Restart weblogic. Check if service is started, if not then modify windows service.
Read this article how to manage ports.
Change the port number with WLST, if it possible for you.
For me the solution was to edit regedit with my weblogic as win service. Path:HKEY_LOCAL_MACHINE/SYSTEM/services/%Name_of_service% and here u can edit settings
(add some strings in setting fields) and then restart machine with u server.
I'm trying to connect JVisualVM, running on my local machine, to a remote machine which is running a WildFly server (version 8.1.0, to be specific.)
I didn't configure the WildFly server myself, and I don't know who did, but I do know that I can log in as an administrative user from my local machine by pointing my browser at:
https://[ip address of the remote machine]:9443/console
Note that it's https, not ordinary http, and that the port for that has been set to 9443 (I think the default is 8080 or 9990 or something... IDK, I saw a lot of port numbers online. I have been explicitly told that http was disabled for this WildFly server).
I can SSH into the remote machine. I can navigate to the bin directory for WildFly and run jboss-client.sh. I have to connect on port 9999 (I think the default is 9990 for that?)
I copied the jboss-client.jar (under bin/client) to my local machine and ran JVisualVM from the command line like this:
.\jvisualvm.exe -cp:a C:\[path to]\jboss-client.jar
It launches fine. File > Add Remote Host: Then I entered the IP. OK. I right clicked on it under Remote in the tree and picked Add JMX Connection. I entered
service:jmx:http-remoting-jmx://[ip]:9999
I checked off that I wanted to use the security credentials and entered the username and password. Checked off to save the security credentials. Left "Do not require SSL Connection" unchecked. Hit OK. It immediately spat out the message
Cannot connect to admin#service:jmx:http-remoting-jmx://[ip]:9999 using service:jmx:http-remoting-jmx://[ip]:9999
I also tried the port 9443, 9990, and 8080 instead. None of those worked. I tried https instead of http in the protocol name. That also didn't work.
What am I missing? How is it that I can access the console, and connect with jboss-client.sh, but I can't use JVisualVM? Is there some log I can use somewhere to see what's wrong? Maybe someone can point out a configuration I've missed somewhere?
Not sure if it's important or not, but my local machine is running Windows 10 with JDK8 installed. The WildFly server is using Java 6 on CentOS 6.3.
You need to add the jboss-client.jar (or jboss-cli-client.jar) to the class path for JVisualVM. The library can be found in the bin/client directory of the WildFly install.
I used the following command to add the library to the class path.
jvisualvm --cp:a ~/servers/wildfly-10.0.0.Final/bin/client/jboss-client.jar
Then I used service:jmx:remote+http://[ip]:[port] and was able to connect.
I don't know if someone else is also (still) having the same issue (Wildfly10 on a remote machine where management console is available at 9443 with HTTPS). The following worked for me.
For ssh connections:
Starting jvisualvm with jboss-client.jar
jvisualvm --cp:a #JBOSS_HOME/bin/client/jboss-client.jar
Using the following connection string:
service:jmx:remote+https://remote-server:9443
NOTE: I used here remote+https
Provide username and password
Hope this helps.
you missed run jstatd command in remote host ,
this little program is RMI server that possible connection from client to remote host though you using jmx connection it used jmxrmi protocol for that connection .
so first in remote host create file name as security.policy with this contain :
grant codebase "file:${java.home}/../lib/tools.jar" {
permission java.security.AllPermission;
};
off course you must in file section for linux put explicit path and then of creation this file put it in bin directory of jdk.home
then you should run this command on remote host
$JAVA_HOME/bin/jstatd -J-Djava.security.policy=path of /security.policy -J-Djava.rmi.server.hostname=remote ip address -J-Djava.net.preferIPv4Stack=true
then you could connect to server off course with correct settings.
Include jboss-cli-client.jar and jboss-client.jar under \lib\visualvm\platform\lib and restart jvisualvm to pickup new jars.
I created a small web application.if i deployed its work but if try to run application it show
the port 8888 appears to be in use(perhaps by another lanch),do you still to contine with this lanch? i clicked yes
but show the error
Could not open the requested socket: Address already in use: bind
Try overriding --address and/or --port.
The problem is what it is stating.
You are facing this issue because of the following:
Either the port 8888 is in use by some other application and not previous launch. This is less likely.
This condition is more likely and it is because you have already launched the application once i.e. via the Run as Web Application. And it is still running. In your Eclipse, visit the Window-> Show View -> Console. And in the Console window, you will find one or more previous instances running. Please stop that.
There are some instances where the solution suggested by Romin will not work because the option to stop the process does not present itself in the console.
In these cases, you can probably find out which process ID is using the port and then kill that process.
For example, on a mac, this worked for me:
😈 >lsof -i tcp:8888
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 25866 alexryan 60u IPv6 0x96e9c26778f105e1 0t0 TCP localhost:ddi-tcp-1 (LISTEN)
😈 >kill 25866
😈 >lsof -i tcp:8888
😈 >
The port number 8888 is in use means that port already been activated. do one thing go to servicees option of control panel set the server start option from automatic to manual. Then your apps will get run. else you can stop the server from your eclipse env stop option.
I have a Java application which is running as non root mode.
My App will create a TFTP server (using apache commons tftp). TFTP server is bind to port 69(Default TFTP port). When running the app from IDE everything works fine since the IDE running as root. But if the app is run from other user i get the error
java.net.BindException: Permission denied
It is clear that for non root user i can not open the port. Is there a workaround for this issue?
For binding on Linux of ports less that 1024 you need to application to run a root. There is no way around this. If you need to do this you have you run as root. sudo might be the command to look into.
BTW - Running your IDE as root is not a very good idea.
To resolve this issue. You can use setuid() and setfid() system calls. So that you can temporarily elevate the permissions and then drop the permission back to user permissions.
In my Case, this problem happened in Solaris 11 OS. I added privileges to user to use the ports under 1024.
https://technicalsanctuary.wordpress.com/2014/06/03/allowing-a-user-to-use-ports-under-1024-on-solaris-11/
Some times whenever I restart the application, which is built on
Java
Struts
Mysql and Jboss 4.05 Version
I get the error as Address already in use: JVM_Bind
Only fix that i know is to restart the machine and try again, it will work.
Else Some times I do Ctrl-Alt-Del and Stop all the process related to Java, some times this also works.
But what is the exact reason and how can we prevent this problem ?
Address already in use: JVM_Bind
means that some other application is already listening on the port your current application is trying to bind.
what you need to do is, either change the port for your current application or better; just find out the already running application and kill it.
on Linux you can find the application pid by using,
netstat -tulpn
In windows this scenario happens when Eclipse crashes without a clean shutdown it will have the local Jetty or Tomcat server keep running.
When you reopen Eclipse and try to start server again this will lead to the "Address already in use: JVM_Bind"
You can solve this by opening Task Manager and find the javaw.exe process and ending it.
Then you can restart the server on Eclipse.
On windows, in an elevated cmd/ps
net stop winnat
then
net start winnat
Resets the windows' NAT service and that removes faulty listeners.
This method works for most 'cannot listen on this port' errors, like as in Docker, JVM etc.
I usually come across this when the port which the server (I use JBoss) is already in use
Usual suspects
Apache Http Server => turn down the service if working in windows.
IIS => stop the ISS using
Skype =>yea I got skype attaching itself to port 80
To change the port to which JBoss 4.2.x binds itself go to:
"C:\jboss4.2.2\server\default\deploy\jboss-web.deployer\server.xml"
here default is the instance of the server
change the port here :
<Connector port="8080"
address="${jboss.bind.address}" >
In the above example the port is bound to 8080
Open command line and type: netstat -a -o -n or tasklist to see currently running processes.
Find port that related to Java and type: taskkill /F /PID <your PID number>.
Click Enter.
Is it possible that MySql listening on the same port as JBoss?
Is there a port number given in the error message - something like Address already in use: JVM_Bind:8080
You can change the port in JBoss server.xml to test this.
For the sake of completeness as many may fall in this SO for other reasons than OP's question, here is another info that saved my day :
TL;DR;
Check that the port you want to open is not reserved (even though no application has opened it)
On windows :
netsh interface ipv4 show excludedportrange protocol=tcp
Explanation :
At least on windows, another possible cause for the java.net.BindException: Address already in use: JVM_Bind is that the operating system has "reserved" the port.
If you use the commands from other answer in this topic, they will tell you that no application is listening to the port, yet you cannot open it.
Some windows update like this one reserves range port that can then no longer be claimed by processes.
Though not explicit on the port that can no longer be opened, the update note mentions a command that can help troubleshooting the issue :
netsh interface ipv4 show excludedportrange protocol=tcp
this will yield a list of port range that are blocked :
Protocol tcp Port Exclusion Ranges
Start Port End Port
---------- --------
5357 5357
49709 49808
49809 49908
49909 50008
50009 50108
50109 50208
50280 50379
* - Administered port exclusions.
The quick answer on how to prevent it is that you most likely need to stop JBoss before starting it again.
You should be able to call the "Terminate" button in the Console view to shutdown the server.
That error means that the you are trying to create a new ServerSocket on a port already in use by another ServerSocket. So try to make your application closing all sockets and connections you know about and be sure your application is completely terminated. Also check if there is another proces you launched by your program.
It can be also caused by double definition of port 8080 in ..\tomcat\conf\server.xml :
<Connector port="8080"
enableLookups="false" redirectPort="8443" debug="0"/>
<Connector port="8080"
enableLookups="false" address="127.0.0.1" maxParameterCount="30000"/>
please try following options for JVM binding exception:
start and stop the server. and check the server process ids and kill and stop the server.
go to control panel->administrative tool-> service-> check all server and stop all the servers and then start your own server.
change the Browser which your using. for example if
your using IE ,change it to Mozilla firefox.
I was having this problem too. For me, I couldn't start/stop openfire (it said it was stopped, but everything was still running)
sudo /etc/init.d/openfire stop
sudo /etc/init.d/openfire start
Also, restarting apache did not help either
sudo /etc/init.d/apache2 restart
The errors were inside:
/opt/openfire/logs/stderror.log
Error creating server listener on port 5269: Address already in use
Error creating server listener on port 5222: Address already in use
The way I fixed this, I had to actually turn off the server inside the admin area for my host.
I had the same on Windows. My solution was to get which port the debug wants to connect to. (In IntelliJ a red rectangle already giving the info: "Error running Tomcat: Unable to open debugger port (127.0.0.1:XXXXX): ... Already in use...")
Let's say XXXXX is the port number.
Then i searched for the problem and the PID in a cmd window:
netstat -ano | find "CLOSE_WAIT" | find ":XXXXX"
I got the PID number as the last number in the result line. (Let's say YYYY)
Finally:
TASKKILL /PID YYYY
An extra info: Winscp logged out meanwhile, probably it was causing my problem. :)
This recently happen to me when enabling JMX on two running tomcat service within Eclipse. I mistakenly put the same port for each server.
Simply give each jmx remote a different port
Server 1
-Dcom.sun.management.jmxremote.port=9000
Server 2
-Dcom.sun.management.jmxremote.port=9001
You can try deleting the Team Server credentials, most likely those will include some kind of port in the server column.
Like https://wathever.visualstudio.com:443
Go to Windows/Preferences
expand Team then Team Foundation Server
go to Credentials and remove whichever is there.
On Mac, even when I'd search with netstat, no processes were binding to that port, but I'd still get the "Address already in use" Bind exception.
In this case, going into
Safari -> Preferences -> Privacy -> Manage Website Data... -> finding "localhost" -> Remove
fixes the problem, if there really is no process running with that port. It seems Safari's web cache maintains a reference to the port somehow, and removing that cache frees up the port.
Sometimes, I use lsof -i:8080 and I get nothing back, no pid. Well something has to be taking place. If this is your case, it could be docker. By using docker ps you can check if you have any old dockers lying around and kill them. This could be the culprit for a port already in use error.