docker java rmi connectexception connection refused to hostmatlab dynamic property set method

docker java rmi connectexception connection refused to host

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And I have even created password and access file in the below location /opt/sonarsource/sonar/conf/jmxremote.password and even gave CHMOD 600 for password file as mentioned in Docs , But After that When I restart Sonarqube , It is giving me the below error, Error: Password file not readable: /opt/sonarsource/sonar/conf/jmxremote.password cycle the client until connected with a cooldown timer. I am trying to run a number of docker containers that connect to each other via java RMI. This is working as expected and able to connect from jmc, jconsole, jvisualvm: Thanks alot. Thu Mar 30 14:50:34 AZT 2017 JMXServerContoller.getJMXConnector() failed to return connection - Failed to retrieve RMIServer stub: javax.naming.NameNotFoundException: jmxrmi17983:9. ArcGIS Server 10.5 server starting but services failing to start Applies to: Oracle AutoVue Office - Version 21.0.0 and later . Does the order of validations and MAC with clear text matter? I am trying to Integrate monitoring Sonarqube with Datadaog, regarding that I have done the JMX integration part and updated the required details , I have followed the below urls. not the best plugin for building the image it seems to be having repeated entries or something have you tried this one? If you're going to use a single machine for it you'll need to launch both master and slave on it. Software Quality Assurance & Testing Meta. Thu Mar 30 14:50:34 AZT 2017:NodeAgent loaded plugin 'ConfigSynchronizer'. In 5e D&D and Grim Hollow, how does the Specter transformation affect a human PC in regards to the 'undead' characteristics and spells? connectException rebind Runtime.getRuntime().exec("rmiregistry 2020"); MyServer server = new MyServer(); Naming.rebind("//localhost:2020/RemoteDataPointHandler", server); rmi// localhost2020 / RemoteDataPointHandler 127.0.0.1 IP Please do not close this issue prematurely. Make sure the JVM is running and that you are using the correct protocol in the Service URL (service:jmx:rmi:///jndi/rmi://10.116.66.175:9090/jmxrmi). java.net.ConnectException: Connection refused: connect at sun.rmi.transport.tcp.TCPEndpoint.newSocket (TCPEndpoint.java:567) at sun.rmi.transport.tcp.TCPChannel.createConnection (TCPChannel.java:185) On the machine the JBoss server runs on check your /etc/hosts file. 1.8.0. I got the issue when I tried to start HTTP/FTP servers on ST Edge. Getting Error: "java.rmi.ConnectException: Connection refused" when Starting the AutoVue Server (Doc ID 753635.1) Last updated on MAY 20, 2021. Thu Mar 30 14:50:34 AZT 2017:NodeAgent loaded plugin 'LogFileLimiter'. The best answers are voted up and rise to the top, Not the answer you're looking for? Hi @eduyayo, many thanks for digging into this issue. Thanks to @Chris-Heald for making this a really quick and simple fix! By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. To learn more, see our tips on writing great answers. Thu Mar 30 14:50:33 AZT 2017:Start NodeAgent.start(). Generating points along line with specifying the origin of point generation in QGIS. import java.rmi.Remote; import java.rmi.RemoteException . This week, I tried to deployed another Edge server using . I've used jib plugin instead of fabric8 in branch https://github.com/MaurizioSodano/java.RMI.Docker/tree/bugfix/clientLocal, Using these configuration in docker-compose.yml, It doesn't work even in docker containers, Hi @bsorrentino, I've implemented the suggested stackOverlow solution in branch https://github.com/MaurizioSodano/java.RMI.Docker/tree/bugfix/rmiServerDocker, but it gives the same error when connecting from the host. In Jmeter I've built a test plan as follows: Username with value and Password with value. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. I have tried a number of variations of network_mode and passing localhost as an argument in the java command of the client to no success. But your's looks alot more clean. -Dcom.sun.management.jmxremote.ssl=false. vinodkumar4b9 (Vinodkumar4b9) February 12, 2021, 6:47am 5 Hi Tobias, Thanks for the details on this , May Be i guess there might be an issue regarding the owner as you said , let me check and get back to you on this. java.net.ConnectException: Connection refused: connect] A possible cause of this exception includes no JMX Connector Server running on the specified host and port combination. Registry registry = LocateRegistry.createRegistry(1024);Registry registry = LocateRegistry.createRegistry(1024); javaw.exermiregistry.exermi, , javasbinrmiregistry.exeJava, rmi, , "//localhost:2020/RemoteDataPointHandler", // Standard extensions get all permissions by default, "C:\\Users\\Durai\\workspace\\RMI\\src\\server\\server.policy". Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Apache Tomcat 6 plugin; Connection refused to host ERROR - VMware What differentiates living as mere roommates from living in a marriage-like relationship? Thu Mar 30 14:50:34 AZT 2017:NodeAgent loaded plugin 'ProcessMonitor'. jvm 1 | 2021.02.11 10:28:53 INFO app[o.s.a.SchedulerImpl] SonarQube is stopped. User without create permission can create a custom object from Managed package using Custom Rest API. This works outside of the docker containers (with sudo) but I get an java.rmi.ConnectException: Connection refused to host: localhost exception when running it in via docker-compose. How to access JMX interface in docker from outside? java -Dcom.sun.management.jmxremote.port=6001 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -jar /app.jar, 1st attempt to solve: You are ready to use Java Mission Control and start your JMC to monitor JMX Remotely and you are seeing: Reasons for java.net.ConnectException. status : ERROR JMeter Client/Server Remote Testing on Docker - Qiita Can you give me some clue, some idea about the reason of this error? Thank you very much for your support. Hi, my name is Alejandro and Im trying to perform some profiling using JCM or JVM tools (included in java jdk). (Ep. I think this suggests that my JMX port is active and working properly, but that when I execute JMX monitoring remotely (from machine 2) it looks like the JMX tool does not recognize the internal docker IP (172.17.0.85). Caused by: java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: Most likely you are not running your server with the right JVM parameters. Message (throw): RegistryManager: Bind failed. Connection Time and response Time In JMeter, Xmpp server connection is not establishing in jmeter, Jmeter: Unable to connect via SAML protocol, Embedded hyperlinks in a thesis or research paper, Image of minimal degree representation of quasisimple group unique up to conjugacy. AdminServer attempts to bind to the wrong IP Address [Solved] java.net.ConnectException: Connection refused Just to be sure to have done it properly, I summarize the steps here: And here I have my problem starting the container : WARNING: Could not connect to Log service. I also changed the SERVER TMP in usr/init_user_param.sh but that didn't work also after a server stop and start. Generating points along line with specifying the origin of point generation in QGIS. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Did the drapes in old theatres actually say "ASBESTOS" on them? (Socket.java:100)at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:25)at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:120)at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:499)at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:190)at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:174)at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:83)at org.jnp.server.NamingServer_Stub.lookup(Unknown Source)at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:365)at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:349), There is something wrong with your ip configuration.RMI thinks your server's ip address is 127.0.0.1You can check this by adding the following parameterto the java command in run.sh or run.bat(on the SERVER side ! Why am I getting the error "connection refused" with JMX rev2023.5.1.43405. jib-maven-plugin How to copy files from host to Docker container? Making statements based on opinion; back them up with references or personal experience. I'll look into this plugin and check if it works. if Not Is It ok if I mention Jmx.remoteauthenticate=false. You can not post a blank message. Connect and share knowledge within a single location that is structured and easy to search. i.e. Found I could get a valid connection for my localhost usecase by setting network_mode: host for all modules. How to use JConsole to monitor Java apps remotely? Datadog JMX Issue - SonarQube - Sonar Community Here's the thread where I discuss it in more detail: Re: Connection refused to host: 127.0.0.1, Re: changing '/etc/hosts' solved the problem [Connection ref, http://www.jboss.org/modules/bb/index.html?module=bb&op=viewtopic&t=. chmod 600 sets the file permissions to read/write only for the user that owns the file. Making statements based on opinion; back them up with references or personal experience. Is "I didn't think it was serious" usually a good defence against "duty to rescue"? jvm 1 | at sun.management.jmxremote.ConnectorBootstrap.checkPasswordFile(ConnectorBootstrap.java:567) . Any suggestions from the below logs of why the services might not be starting? Thu Mar 30 14:50:34 AZT 2017:Invoking beforeStart() for all observers. If you want to test the approach check out JMeter Distributed Testing Step-by-step guide. The stub then communicates with the remote object, via the same or another connection, to the same or another port. The log reads like somethings blocking access to RMI, which ArcGIS Server uses internally when publishing services. rev2023.5.1.43405. Also,. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Can you still use Commanders Strike if the only attack available to forego is an attack against an ally? Asking for help, clarification, or responding to other answers. By default RMI runs on port 1098, and should increment up if that port is in use. telnet 127.0.0.1 1099. java.rmi.server.hostname property can be set either in system.properties file (which lives under /bin folder of your JMeter installation) or passed directly to JMeter startup script via -D key as jmeter -Djava.rmi.server.hostname=10.20.30.40 This way you can specify interface to bind to. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, How to get a Docker container's IP address from the host, Docker: Copying files from Docker container to host. If so, how? How do I generate random integers within a specific range in Java? 1. java.net.ConnectException: Connection timed out: connect Docker: Copying files from Docker container to host. Not the answer you're looking for? This problem should be possible to overcome with the help of a custom RMI socket factory. I have tried a number of variations of network_mode and passing localhost as an argument in the java command of the client to no success Dockerfile of Server 1 I did a "telnet localhost 6969" and the port is open and firewall rules are also clear for access from both Hyperic Agent and Hyperic Server. Please support me on Patreon: https://www.patreon.com/roelvandepaarWith thanks & praise to God, and. Message (excp): Connection refused to host: hostname; nested exception is: I am getting a similar error in the service.log file(as given below). Mar 30, 2017 2:50:23 PM ClientCommunicatorAdmin restart, WARNING: Failed to restart: java.rmi.NoSuchObjectException: no such object in table, WARNING: Failed to restart: java.io.IOException: Failed to get a RMI stub: javax.naming.NameNotFoundException: jmxrmi, java.net.ConnectException: Connection refused, at java.net.PlainSocketImpl.socketConnect(Native Method), at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350), at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206), at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188), at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392), at java.net.Socket.connect(Socket.java:589), at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:117), at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:177), at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:304), at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611), at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446), at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863), at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:72), at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:214), at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:160), at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:136), at com.esri.arcgis.discovery.admin.util.HttpUtil.postToURL(HttpUtil.java:405), at com.esri.arcgis.discovery.admin.util.HttpUtil.postPropsToURL(HttpUtil.java:329), at com.esri.arcgis.discovery.admin.system.handlers.RestConfigManager$a.call(RestConfigManager$a.java:710), at java.util.concurrent.FutureTask.run(FutureTask.java:266), at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142), at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617), Service.log file contents (last 100 lines). If we had a video livestream of a clock being sent to Mars, what would we see? jvm 1 | at sun.management.Agent.startAgent(Agent.java:452) Connect and share knowledge within a single location that is structured and easy to search. application server was not connected before run configuration stop By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Not the answer you're looking for? container1 port 7777 > host port 7777 Asking for help, clarification, or responding to other answers. If you one just one host there is no need to use distributed testing. Are these quarters notes or just eighth notes? These are some scenarios to we need to consider for some JMX Docker Monitoring configuration: Local (192.168.1.10) --> Local Docker Service (192.168.1.10) [Local Container Spring Boot JMX Enabled]: xcolor: How to get the complementary color. This way you can specify interface to bind to. Error: Password file not readable: /opt/sonarsource/sonar/conf/jmxremote.password. See Apache JMeter Properties Customization Guide for more details on manipulating JMeter properties. java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: java.net.ConnectException: Connection refused: connect at sun.rmi.transport.tcp.TCPEndpoint.newSocket (TCPEndpoint.java:574) at sun.rmi.transport.tcp.TCPChannel.createConnection (TCPChannel.java:185) The Registry isn't running in the localhost. you will get a blank window waiting for your input. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. and my preferred: Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Thu Mar 30 14:50:33 AZT 2017:NodeAgent loaded observer 'ServerConfigObserver'. Can you please tell us what we are doing wrong here ? (Name of window being Telnet host). resolved my issue, Under Remote hosts and RMI configuration java.net.ConnectException: Connection refused (Connection refused)] The serverdiag seems to be OK with the warning of core services not starting. -Dcom.sun.management.jmxremote.rmi.port=9090 Identify blue/translucent jelly-like animal on beach. java.rmi.ConnectException: Connection refused to host: localhost I have tried several different configurations but i just cant get it working. That "random port" is an ephemeral https://en.wikipedia.org/wiki/Ephemeral_port usted as a socket for serving the client. java rmi127.0.1.1ip192.168 X - IT privacy statement. java.rmi.ConnectException: Connection refused to host: 172.17.0.85; nested exception is, java.net.ConnectException: Operation timed out, at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619). What do hollow blue circles with a dot mean on the World Map? Horizontal and vertical centering in xltabular. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Please contact me if anything is amiss at Roel D.OT VandePaar A.T gmail.com Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. instance_name : jmx_instance. ")); //Process process = Runtime.getRuntime().exec("C:\\Users\\Durai\\workspace\\RMI\\src\\server\\rmi_registry_start.bat"); "Server is connected and ready for operation. I ended up doing a bit more messy soluting with UnicastRemoteObject.exportObject(obj,port). Which reverse polarity protection is better and why? Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Connection refused to host: 127.0.0.1| JBoss.org Content Archive (Read By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Can corresponding author withdraw a paper after it has accepted without permission/acceptance of first author. Connect and share knowledge within a single location that is structured and easy to search. IDE launches Maven import in a separate java process and communicates with it using java RMI calls which work via local loopback interface ( localhost ). ". Since docker only allows connections to ports you have explicit linked to the host-machine, the initialization of the RMI-server side is happening, but the actual data-transfer from method-invokation is "blocked". Ive added the following properties to the glassfish JVM options: -Djava.rmi.server.hostname=10.116.66.175 sh /'jmeter file path'/jmeter-server -Djava.rmi.server.hostname='Slave machine IP . Issue is regarding the user which I have created those files. I know the port 9090 is open in server 10.116.66.175 because i can connect it by telnet. -Dcom.sun.management.jmxremote.local.only=false -Dcom.sun.management.jmxremote The service-error.log file indicates error in Java below. java.rmi.server.hostname - The IP address of the host machine where your Java application is running. I've checked out the branch, I've decompressed the tar file and the jar is inside a folder called maven. Find centralized, trusted content and collaborate around the technologies you use most. Maybe your executing a distributed test without setting up a master and slave where you should be executing single machine! Share add some util in the client waiting for the port to be open/available similar to this. Thu Mar 30 14:50:34 AZT 2017:Starting all plugins.arcgis, StartRMID - arg: -J-Djava.security.policy=file:////home/arcgis/server/framework/etc/rmid.policy, StartRMID - arg: -J-Dsun.rmi.activation.execPolicy=com.esri.arcgis.discovery.servicelib.impl.RMIDPolicyChecker, StartRMID - arg: -J-Djava.class.path=/home/arcgis/server/framework/lib/server/arcgis-servicelib.jar:/home/arcgis/server/framework/lib/server/arcgis-common.jar, StartRMID - arg: -J-Djava.rmi.server.useCodebaseOnly=true, Using GERONIMO_HOME: /home/arcgis/server/geronimo, Using ARCGIS_JAVA_HOME: /home/arcgis/server//framework/runtime/jre, Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0. The configuration looks like this: Note that when I run JMX monitoring from machine 2, it fails with a version of the following error (note: the same error occurs when I run jconsole, jvisualvm, jmxtrans, and node-jmx/npm:jmx): The stack trace upon failing looks something like the following for each of the JMX monitoring tools: Now the interesting part is when I run the same tools (jconsole, jvisualvm, jmxtrans, and node-jmx/npm:jmx) on the same machine that is running docker (machine 1 from above) the JMX monitoring works properly. Im using jconsole from jdk 1.8.0_40, container runs java 1.8.0_20. java.rmi.ConnectException: Connection refused to host: localhost in docker containers, When AI meets IP: Can artists sue AI imitators? I have tomcat image that I use port 7777 for jmx, I have 3 containers running. When IDE is unable to establish connection to a localhost this error occurs. -Dcom.sun.management.jmxremote.port=9090 And I feel There is no changes required regarding for compute Engine as you have mentioned There is no specific javaAdditionalOpts entry, simply amend sonar.ce.javaOpts, So I guess there was nothing I have done . java.rmi.ConnectException: Connection refused to host: <HOSTNAME>; nested exception is: java.net.ConnectException: Connection refused . I am trying to remotely monitor a JVM running in docker. docker0 Link encap:Ethernet HWaddr inet addr:172.17.42.1 Bcast:0.0.0.0 Mask:255.255.0.0, UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1, RX packets:6787941 errors:0 dropped:0 overruns:0 frame:0, TX packets:4875190 errors:0 dropped:0 overruns:0 carrier:0, RX bytes:1907319636 (1.9 GB) TX bytes:639691630 (639.6 MB). Why are players required to record the moves in World Championship Classical games? -Dcom.sun.management.jmxremote.authenticate=false Why don't we use the 7805 for car phone chargers? Using java args: "Connection refused" when syncing Maven project in 2021.1 : java.rmi java -Dcom.sun.management.jmxremote.port=6001 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -jar /app.jar, Or thru docker compose expose port 6001 (it does not matter if the external host port is the same or not): ArcGIS Server 10.5 server starting but services fa init_user_param.sh but that didn't work also after a server stop and start. Ubuntu won't accept my choice of password. Is this done in the jmeter.properties file? I suppose that exist some IP incompatibility or something like this. Datadog, the leading service for cloud-scale monitoring. **], JMX port trying to expose for our docker container 6001. New replies are no longer allowed. java.rmi.ConnectException: Connection refused to host: -Dcom.sun.management.jmxremote.ssl=false 2. http://enterprise.arcgis.com/en/server/latest/install/linux/ports-used-by-arcgis-server.htm. if you have created this file with another user account and set the permissions this file becomes unreadable for everyone else, including the user that runs sonarqube. It fails when running the server from the docker container and the client from the host machine trying to connect to the server. The ArcGIS Server version is 10.4.1 for Windows. I'm learning and will appreciate any help. Which was the first Sci-Fi story to predict obnoxious "robo calls"? java.rmi.ConnectException: Connection refused to host: 172.17..85; nested exception is. Writing log message to console. Is applying the Ramp up period mandatory while doing load testing with huge load? I've found that changing the network_mode to host in the server container and adding the naming -Djava.rmi.server.hostname=192.168.99.100 in the server start script allows me to connect from the host machine. 3rd attempt to solve: Then you have no more options BUT this parameter is going to help us -Dcom.sun.management.jmxremote.rmi.port=6001 , start your JMC to monitor JMX Remotely and you are seeing: java -Dcom.sun.management.jmxremote=true -Dcom.sun.management.jmxremote.port=6001 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=192.168.1.108 -Dcom.sun.management.jmxremote.rmi.port=6001 -jar /app.jar. Would My Planets Blue Sun Kill Earth-Life? The IP address that the AdminServer is attempting to bind to is not valid when working remote from the office location. This answer would have been gold yesterday. To learn more, see our tips on writing great answers. It works as expected when running on two containers (server and client) running on the same host. Jconsole will usually connect initially, after warning about insecure connection, then becomes disconnected immediately. jvm 1 | 2021.02.11 10:28:53 INFO app[o.s.a.SchedulerImpl] Process [es] is stopped I have built my first test plan in Jmeter, but when I run it I get an error: So my question is, do I need to set my java.rmi.server.hostname property at the server? jvm 1 | 2021.02.11 10:28:53 INFO app[o.s.a.SchedulerImpl] Process [web] is stopped containerr3 port 7777>host port 32789. How do I read / convert an InputStream into a String in Java? java.net.ConnectException: Connection timed out: connect Could not connect to 10.116.66.175:9090. Does the order of validations and MAC with clear text matter? If ArcGIS Server is going to continue to be unavailable, remove the machine from the site.. The agent auto detected Tomat and I've also added it from the Dashboard. sounds like a configuration problem, or something related to the way datadog is trying to access the jmx metrics to me. i started the server successfully with C:\Documents and Settings\benedict\workspace\RMIDemo\bin>java -cp C:/"Documents and settings". I've created a new branch bugfix/clientLocalConnection implementing your suggestions. -Dcom.sun.management.jmxremote.authenticate=false need to force quite jconsole. is the owner of this file the same one that is running sonarqube? . System.out.println("server alive"); Unable to connect to the server container from the host client #1 - Github Your client code is trying to use TCP/IP to connect to your server. java.rmi.server.hostnameClientIPIP $ . That error message is ->. What are the differences between a HashMap and a Hashtable in Java? java.io.IOExceptionRMIjavax.naming.ServiceUnavailableException [java.rmi.ConnectExceptionlocalhostjava.net.ConnectException] What do hollow blue circles with a dot mean on the World Map? Can I use an 11 watt LED bulb in a lamp rated for 8.6 watts maximum? The service.log seems OK.

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docker java rmi connectexception connection refused to host