Tomcat is running but 8080 port is not responding
Solution 1
First step is to run telnet localhost 8080 when logged in locally. Then type in something like
GET /
and you should get HTML back. If that doesn't work, then tomcat is not really running properly or is not listening on port 8080. If that works but when trying from outside, make sure that you have the correct ip address. Try with ip address first. If ip address works, perhaps your mydomain.com doesn't resolve to it. If ip is correct (the same one you are ssh'ing to) and it still doesn' work, then you are probably running firewall which doesn't allow 8080 through. Changing firewall configuration requires root access.
Solution 2
The problem for me was that my Tomcat started listening to IPv6 ONLY. Putting it here in case somebody else finds out the same thing.
I was able to get proper responses with
curl -g -6 "http://[::1]:8080/"
But not with localhost.
To fix this, I removed address
attribute from conf/server.xml:
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" URIEncoding="UTF-8" />
address="0.0.0.0" />
and restarted and it bound to IPv4 again. I know it should be other way around, but this was what fixed it for me. OS was Ubuntu.
Solution 3
Try to list out using following command on linux terminal TCP IP and port reference to the application like "java" as below.
[root@h5 ~]# netstat -ltnp | grep java -i --colour
tcp 0 0 10.15.11.20:9990 0.0.0.0:* LISTEN 1626/java
tcp 0 0 10.15.11.20:8080 0.0.0.0:* LISTEN 1626/java
tcp 0 0 10.15.11.20:8443 0.0.0.0:* LISTEN 1626/java
Further first you need to check the open ports at the firewall.
firewall-cmd --list-ports
If it is turn on and port is not there please allow the relevant port 8080 as below.
firewall-cmd --permanent --zone=public --add-port=8080
firewall-cmd --reload
Solution 4
On CentOs I had to open the firewall manually
sudo firewall-cmd --zone=public --add-port=7999/tcp --permanent
sudo firewall-cmd --reload
Not sure how, but if Docker was running a container on the same port, it would automatically open the firewall and so was throwing me off
Ulises Layera
Updated on December 24, 2021Comments
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Ulises Layera over 2 years
I have installed sun
jdk 1.6 x64
and tomcat in a linux x64 machine through ssh, I don't have root privileges so I installed both in my home dir.I managed to successful run tomcat but if I try to enter mydomain.com:8080 there's no answer from the server.
With this command:
netstat -atnp|grep LISTEN
I checked the port and it is LISTENING
Dec 18, 2011 5:11:20 PM org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /home2/fiegmund/jdk1.6.0_25/jre/lib/amd64/server:/home2/fiegmund/jdk1.6.0_25/jre/lib/amd64:/home2/fiegmund/jdk1.6.0_25/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib Dec 18, 2011 5:11:21 PM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["http-bio-8080"] Dec 18, 2011 5:11:21 PM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["ajp-bio-8009"] Dec 18, 2011 5:11:21 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 2015 ms Dec 18, 2011 5:11:21 PM org.apache.catalina.core.StandardService startInternal INFO: Starting service Catalina Dec 18, 2011 5:11:21 PM org.apache.catalina.core.StandardEngine startInternal INFO: Starting Servlet Engine: Apache Tomcat/7.0.23 Dec 18, 2011 5:11:21 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /home2/fiegmund/apache-tomcat-7.0.23/webapps/docs Dec 18, 2011 5:11:24 PM org.apache.catalina.util.SessionIdGenerator createSecureRandom INFO: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [1,869] milliseconds. Dec 18, 2011 5:11:24 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /home2/fiegmund/apache-tomcat-7.0.23/webapps/manager Dec 18, 2011 5:11:24 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /home2/fiegmund/apache-tomcat-7.0.23/webapps/ROOT Dec 18, 2011 5:11:24 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /home2/fiegmund/apache-tomcat-7.0.23/webapps/examples Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://java.sun.com/jstl/core is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://java.sun.com/jstl/sql_rt is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/sql is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://java.sun.com/jstl/core_rt is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/core is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/functions is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://java.sun.com/jstl/fmt is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://jakarta.apache.org/taglibs/standard/permittedTaglibs is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://java.sun.com/jstl/xml is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://jakarta.apache.org/taglibs/standard/scriptfree is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://java.sun.com/jstl/fmt_rt is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/fmt is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/xml is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://java.sun.com/jstl/xml_rt is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.TaglibUriRule body INFO: TLD skipped. URI: http://java.sun.com/jstl/sql is already defined Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.HostConfig deployDirectory INFO: Deploying web application directory /home2/fiegmund/apache-tomcat-7.0.23/webapps/host-manager Dec 18, 2011 5:11:25 PM org.apache.coyote.AbstractProtocol start INFO: Starting ProtocolHandler ["http-bio-8080"] Dec 18, 2011 5:11:25 PM org.apache.coyote.AbstractProtocol start INFO: Starting ProtocolHandler ["ajp-bio-8009"] Dec 18, 2011 5:11:25 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 4582 ms>
Any ideas that what is the problem?
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Ulises Layera over 12 yearsi forgot to tell that the server have already installed Apache http Server using port 80. Anyway, i tried with: lwp-request localhost:8080 and i got the html of apache tomcat...
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Tobia almost 8 yearsI checked ports with netstat, and I got :::8080 and 0.0.0.0:8080. Telnetting GET / it doesn't reply at all. I have good logs from web app startup. What should I check?
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milosmns over 6 yearsThis is not an IDE problem. OP clearly states that it's a Linux server with SSH access.
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sametcodes about 5 yearsyou saved my day!
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pawello2222 over 3 yearsLink-only answers are discouraged, please include the most important code in your answer.