Unable to open debugger port in IntelliJ

Question

Unable to open debugger port in intellij  The port number 9009 matches the one which has been set in the configuration file for the application    lt java-config debug-options  -Xdebug -Xrunjdwp transport dt socket server y suspend n address 9009  system-classpath    native-library-path-prefix  D  Project lib windows 64bit  classpath-suffix    gt       lt jvm-options gt -XX MaxPermSize 192m lt  jvm-options gt       lt jvm-options gt -client lt  jvm-options gt       lt jvm-options gt -XX  UnlockDiagnosticVMOptions lt  jvm-options gt       lt jvm-options gt -XX  LogVMOutput lt  jvm-options gt       lt jvm-options gt -XX LogFile   com sun aas instanceRoot  logs jvm log lt  jvm-options gt       lt jvm-options gt -Djava endorsed dirs   com sun aas installRoot  modules endorsed  path separator   com sun aas installRoot  lib endorsed lt  jvm-options gt       lt jvm-options gt -Djava security policy   com sun aas instanceRoot  config server policy lt  jvm-options gt       lt jvm-options gt -Djava security auth login config   com sun aas instanceRoot  config login conf lt  jvm-options gt       lt jvm-options gt -Dcom sun enterprise security httpsOutboundKeyAlias s1as lt  jvm-options gt       lt jvm-options gt -Djavax net ssl keyStore   com sun aas instanceRoot  config keystore jks lt  jvm-options gt       lt jvm-options gt -Djavax net ssl trustStore   com sun aas instanceRoot  config cacerts jks lt  jvm-options gt       lt jvm-options gt -Djava ext dirs   com sun aas javaRoot  lib ext  path separator   com sun aas javaRoot  jre lib ext  path separator   com sun aas instanceRoot  lib ext lt  jvm-options gt       lt jvm-options gt -Djdbc drivers org apache derby jdbc ClientDriver lt  jvm-options gt       lt jvm-options gt -DANTLR USE DIRECT CLASS LOADING true lt  jvm-options gt       lt jvm-options gt -Dcom sun enterprise config config environment factory class com sun enterprise config serverbeans AppserverConfigEnvironmentFactory lt  jvm-options gt       lt jvm-options gt -Dosgi shell telnet port 4766 lt  jvm-options gt       lt jvm-options gt -Dosgi shell telnet maxconn 1 lt  jvm-options gt       lt jvm-options gt -Dosgi shell telnet ip 127 0 0 1 lt  jvm-options gt       lt jvm-options gt -Dfelix fileinstall dir   com sun aas installRoot  modules autostart  lt  jvm-options gt       lt jvm-options gt -Dfelix fileinstall poll 5000 lt  jvm-options gt       lt jvm-options gt -Dfelix fileinstall debug 1 lt  jvm-options gt       lt jvm-options gt -Dfelix fileinstall bundles new start true lt  jvm-options gt       lt jvm-options gt -Dorg glassfish web rfc2109 cookie names enforced false lt  jvm-options gt       lt jvm-options gt -XX NewRatio 2 lt  jvm-options gt       lt jvm-options gt -Xmx2048m lt  jvm-options gt     lt  java-config gt    Configuration in IntelliJ     When I try and enable the remote debugging in for this application it comes up with the following error

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I had the same issue  I just have to remove the HTTP protocol from the URL  That s it    I hope it works for you

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Add the following parameter debug-enabled  true  to this line in the glassfish configuration  Example    lt java-config  debug-options  -Xdebug -Xrunjdwp transport dt socket server y suspend n address 9009  debug-enabled  true    system-classpath    native-library-path-prefix  D  Project lib windows 64bit  classpath-suffix    gt    Start and stop the glassfish domain or service which was using this configuration

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This error can happen Tomcat is already running   So make sure Tomcat isn t running in the background if you ve asked Intellij to start it up   default     Also  check the full output window for more errors   As a more useful error may have preceded this one   as was the case with my configuration just now

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Merely hitting the debug icon again fixed my problem in a few seconds

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Answer is pretty simple  I also faced the problem finally I got perfect solution  Create Debug Create Remote debug with following configuration Firstly run by debug  It gives you waitng for socket 5005 then run with remote debug

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Run your Spring Boot application with the given command to enable debugging on port 6006 while the server is up on port 8090   mvn spring-boot run -Drun jvmArguments  -Xdebug -Xrunjdwp transport dt socket server y suspend y address 6006  -Dserver port 8090

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Try to connect with telnet    if it connects then it shows below    telnet 10 238 136 165 9999 Trying 10 238 136 165    Connected to 10 238 136 165  Escape character is       Connection closed by foreign host   If port is not available  either because someone else is already connected to it or the port is not open etc  then it shows something like it shows like below     telnet 10 238 136 165 9999 Trying 10 238 136 165    telnet  connect to address 10 238 136 165  Connection refused telnet  Unable to connect to remote host  So I think one needs to see whether    the application is property listening to port or not  or someone else has already connected to it   Also try to connect on that m c itself first like   telnet localhost 9999

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You may have to change the debugger port if your port is already used by another program  To do so    Run Edit Configurations Startup Connection tab Debug Change the port here     Or  maybe in other versions    Run Edit Configurations Remote   Remote debug in the list on the left Configuration tab  Settings section Port  change the port here

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For me  the problem was that catalina sh didnt have execute permissions  The  Unable to open debugger port in intellij  message appeared in Intellij  but it sort of masked the  could not execute catalina sh  error that appeared in the logs immediately prior

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I once have this problem too  My solution is to work around this problem by kill the application which is using the port  Here is a article to teach us how to check which application is using which port  find it and kill close it

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This one worked for me-- If the issue still persists  in case you are not using a glassFish server   then close your JIdea and stop the server  This will disable the ports connectivity  Then start your server and JIdea  this will start fresh connectivity with the ports  resolving the issue

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I had the same problem and this solution also did the trick for me  Provide the IP 127 0 0 1 in the Intellij Debug configuration instead of the host name  localhost   in case you re using this hostname

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Set the MAVEN OPTS  It should work     export MAVEN OPTS  -Xdebug -Xnoagent -Djava compiler NONE -Xrunjdwp transport dt socket address 4000 server y suspend n   mvn spring-boot run  -Dserver port 8090

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In glassfish domains domain1 config domain xml set before start server     x000D   x000D         lt java-config classpath-suffix    debug-options  -agentlib jdwp transport dt socket address 9009 server y suspend n  java-home  C  Program Files Java jdk1 8 0 162  debug-enabled  true  system-classpath    gt  x000D   x000D   x000D    or set debug-enabled  true  server y suspend n in http   localhost 4848 common index jsf    In current Idea 2018 - Server Run Configuration - Debug - Port - address

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I m hoping your problem has been solved by now   If not  try this     It looks like you have server y for both your app and IDEA   IDEA should probably be server n   Also  the  IDEA  client should have an address that includes both the host name and the port  e g   address 127 0 0 1 9009

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You must set CHMOD  x  execute for   sh or   bat files   For example  I am using macOS  cd  Users donhuvy Documents tools apache-tomcat-9 0 12 bin sudo chmod  x   sh   Then IntelliJ IDEA  and Apache Tomcat running or debugging just good

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Your Service  Application might already be running  In Search enter Services and you will get list of services  Stop yours and then try again

[java] Unable to open debugger port in IntelliJ

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