Eclipse Error Failed to connect to remote VM

Question

I   m getting the following error when I start Debug from the Eclipse IDE       Message     Failed to connect to remote VM  Connection Refused      What could be the reason

User · Answer

I tried several things mentioned here  but the below method worked for me   Go to Debug Console of Eclipse  where you will find the name of the process which is already existing there  Right click on that process and select  Terminate and Remove   this will terminate the process  Now try initiating the process again and it will work

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If you need to debug an application working on Tomcat  make sure that your Tomcat-folder bin startup bat  if using windows  contains the following lines   set JPDA TRANSPORT  dt socket  set JPDA ADDRESS 8000  call   EXECUTABLE   jpda start  CMD LINE ARGS

User · Answer

The following worked for me  edit the last line of tomcat startup sh from  exec   PRGDIR    EXECUTABLE  start         to  export JPDA ADDRESS 8000 export JPDA TRANSPORT dt socket   exec   PRGDIR    EXECUTABLE  jpda start

User · Answer

I solved it setting in Eclipse    Windows -- gt  Preferences -- gt  Java -- gt  Debug -- gt  Debugger timeout  10000   Before I had set  Debugger timeout  3000  and I had problems with timeout

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I get this error for Weblogic after i installed Quicktime and removing QTJava zip from classpath solves the problem   https   blogs oracle com adfjdev entry java jre7 lib ext qtjava

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Uninstall and install again ADT android plugin

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I had the problem with Tomcat running on Ubuntu  The issue was selinux was enabled and for some reason it would not let Eclipse connect to the debugging port  Disabling selinux or putting it in permissive mode solved the issue for me

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I had and solved this problem by disconnecting from all remote Java applications in the debug window perspective and restarting Eclipse  I could connect again after doing so

User · Answer

Create setenv bat file in nib folder of Tomcat  Add SET JPDA ADDRESS   8787   Override the jpda port Open cmd  go to bin folder of Tomcat and Start tomcat using catalina jpda start Set up a debug point on eclipse Next compile your project  Check localhost 8080   Deploy the war or jar under webapps folder and this must deploy war on Tomcat  Then send the request  the debug point will get hit NOTE   Don t edit catalina bat file  make changes in setenv bat file

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Increase the memory value of the properties   MEM PERM SIZE 64BIT MEM MAX PERM SIZE 64BIT   in setDomainEnv cmd file from  weblogic home  user projects domains your domain bin

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Possible Cause for this error    Your Remote Java Application is not running    Check your Host and Port  many times these entries are not correct    Firewall not allowing access to your remote port    You can also check this how to guide on eclipse remote debugging for more details

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If you are using windows os then replace line in tomcat configuration Tomcat6 bin startup bat   Replace  call   EXECUTABLE   start  CMD LINE ARGS    with  call   EXECUTABLE   jpda start  CMD LINE ARGS

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Remove your proxy from eclipse   Go to network Connections within General Preferences   Windows -  Preferences   and set  Active Provider  to  Direct     Reboot your Eclipse after that

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If you are using Jboss   change in the file jboss7 1 1 bin standalone conf bat the line   rem set  JAVA OPTS  JAVA OPTS  -Xrunjdwp transport dt socket address 8787 server y suspend n    to   set  JAVA OPTS  JAVA OPTS  -Xrunjdwp transport dt socket address 8787 server y suspend n

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Another possibility is that the debug agent is binding to the wrong network interface    I ve just seen this when trying to debug a Windows 10 JVM inside a VirtualBox VM  and I m trying to connect from Eclipse running on the VirtualBox host  In my case  the agent only bound to the 127 0 0 1 interface   To fix  you can qualify the address including the IP of the interface you want to bind to  For example   java -agentlib jdwp transport dt socket server y address 192 168 0 5 8000 suspend n  lt other arguments gt

User · Answer

David Citron is right -- if localhost is not resolving properly  it can cause this problem   Here s how to test   If it works when your PC is not connected to the net  no WiFi  no network cables    If it does work under those conditions  then it may be that you need to make sure that addresses are resolving to localhost properly  The messages that DDMS and adb exe use for debugging and communicating to the VM must properly resolve to localhost on your PC    Yes  it s odd that other commands using DDMS  amp  adb work just fine but debugging doesn t   Seems that something in DDMS or adb needs to be standardized so they all work under the same conditions    If you need to make sure that things are resolving to localhost properly   1  Make sure that this line is in your  Windows System32 drivers etc hosts  file   127 0 0 1  localhost    you can have any amount of whitespace between  127 0 0 1  and  localhost    And -- as David Citron suggested -- make sure that the hosts file is valid and doesn t have cruft or errors in it   2   If that doesn t work  then you may need to also add your PC s IPv4 address to the hosts file  and resolve it to localhost   You can find out the IPv4 address for your machine with the ipconfig command    If  for example  your machine s IPv4 address is 192 168 1 100 then you d add the line    192 168 1 100  localhost   to your hosts file    You can add it below the  127 0 0 1  localhost  line in the file    You can verify that adb  and your emulator if you re running one  is listening on ports by using the netstat -b command   Note that you need admin privileges for the -b option  I open a command window using  Run as Administrator

User · Answer

I am using jboss so solution to your problem was restart   service jboss-portal restart

User · Answer

Have you setup the remote VM to accept connections     java -Xdebug -Xrunjdwp server y transport dt socket address 10000 suspend n yourServer   Is there a firewall in the way   Are you specifying the correct host   port    Are you connected to a VPN

User · Answer

The solution that worked for me is weird    Simply remove the all the break points  Restart tomcat in debug mode  using catalina sh jpda start  Now try to connect and it worked

User · Answer

Our development image only has the Tomcat service installation on it  so setting the environment variables  etc   didn t have any effect   If you need to do this through the Tomcat Windows service  there are a few things you ll need to be aware of    David Citron s comment was the last bit that I needed to get my connection working   The hosts file on our machines has localhost commented out  it s supposedly resolved through the DNS  but that doesn t work for the debug connection    I uncommented it and was able to connect  If user access control is turned on  you ll need to use your admin credentials to access the services control panel or the Tomcat monitor app or whatever you re using to toggle the server state   The monitor app  documented here  is probably the best  because you can both edit the server settings for the debug options and start and stop the server  I thought that perhaps you would need to run Eclipse as an administrator to be able to terminate the Tomcat process  but you don t   Once you have that remote attachment  you re able to work with the service up to termination

User · Answer

Use 0 0 0 0 for addresses to be able to connect form any remote machine i e    -Xdebug -Xrunjdwp transport dt socket address 0 0 0 0 8000 server y suspend y

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I ve encountered like this in Hybris    Check your port in Resource Monitor   Network  Check if other service is using your port     1 2 If yes  then you need to change your properties in project properties  1 3 Change your address  any available address  In my case  I changed from 8000 to 8080  then save   java -Xdebug -Xrunjdwp server y transport dt socket address 8080 suspend n yourServer    In your console  rebuild your ant using command  ant all  Then debug again  using the command  hybrisserver bat debug

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In my case i turn Windows Firewall off   1- Open Windows Firewall by clicking the Start button Picture of the Start button  and then clicking Control Panel  In the search box  type firewall  and then click Windows Firewall   2- Click Turn Windows Firewall on or off   Administrator permission required If you re prompted for an administrator password or confirmation  type the password or provide confirmation   3- Click Turn off Windows Firewall  not recommended  under each network location that you want to stop trying to protect  and then click OK  Was this page helpful   Some times you need also    To stop all Vpn client services  fortiClient  vpn Client      To stop Antivirus Firewall   exemple Kaspersky    Configuration    Anti-Hacker

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I ll add one more possible solution  if you re running this on a virtual machine  vmware  etc     some other process on the host or other VM could already have the port you re trying to connect with   Either stop that other process or choose another port

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NOTE  For glassfish Server login via admin console -  Configurations -  server-config -  JVM-settings    Remember to check Enable checkbox for Debug  Now Note the address  this address will be used in port of eclipse Remote Java Application Debug Check the snap shot in glassfish server here

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add to your run script   export JPDA ADDRESS 8787 export JPDA TRANSPORT dt socket export JPDA HOST localhost  JAVA OPTS  JAVA OPTS -Xms128m -Xmx512m -Dsun rmi dgc client gcInterval 3600000 JAVA OPTS  JAVA OPTS -Dsun rmi dgc server gcInterval 3600000 JAVA OPTS -Xdebug -Xnoagent -Xrunjdwp transport  JPDA TRANSPORT address  JPDA ADDRESS server y suspend n  JAVA OPTS

[java] Eclipse Error: "Failed to connect to remote VM"

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