I am a newbie in Java, and I am trying to develop a web application.
I have Windows 7 32 bit. I have installed Java 7 and set the path and classpath as well. After that I installed Tomcat 7.
When I try to open tomcat home page using URL localhost:8080, it does not open and Tomcat stops automatically.
Please help me.
Make sure no other application using port 8080 before starting tomcat. If that's not the problem please paste tomcat log.
If you want to change tomcat's default port, go to tomcat folder and open conf folder, in which you can see server.xml. In that file you can see something like <Connector port= . Change the port value and start tomcat.
If you started tomcat through eclipse, It can be solved in different ways too.
Method 1:
Right click on server --> Properties
click on Switch location and apply.
Method2:
Double click in the server in eclipse.
Change Server location to Use tomcat installation(takes control of tomcat installation).
Your issue is not with port 8080, but with port 8005. Port 8005 is the shutdown port for Tomcat.
Rather than trying to figure out what is using port 8005, it may just be easier to edit TOMCAT_DIR/conf/server.xml and change the shutdown port to 8006
<Server port="8006" shutdown="SHUTDOWN">
For *Unix based systems, you can check the ports used by a particular application by issueing the following command in the terminal
[~/.]$ netstat -tuplen
You will get the list of all the ports that are being currently held and used by their respective process ID's
For windows user, type netstat -anin command prompt to see ports that are listening, this may come handy.
1) Using Terminal (On Linux), go to the apache-tomcat-directory/bin folder.
2) Type ./catalina.sh start
3) To stop Tomcat, type ./catalina.sh stop from the bin folder. For some reason ./startup.sh doesn't work sometimes.
For mac users
First Try : go to activity monitor -> search for java and kill the instance then restart the server and try.
Second Try:
Check log file for any errors under tomcat logs folder.
Use below command to check tomcat logs in terminal
tail -f {tomcatpath}/logs/catalina.out
Third Try:
Check if node or other apps using the same port. Use below command to check which app listening to a specific port. You will see list of apps with pid in second column.
lsof -i :8080 | grep LISTEN
Kill the process using below command
sudo kill -9 pid
If you are using eclipse to start the server then check for the server location being used and the deployment path:
In my case changing this to Tomcat installation instead of workspace metadata worked for me.
My issue has solved.I was getting log as below.
SEVERE: StandardServer.await: create[localhost:8005]:
java.net.BindException: Cannot assign requested address: JVM_Bind
My tomcat server was automatically stopping when I tried to open tomcat homepage with
URL.
So I just made some changes in windows->System32->drivers->etc->host file.
keep only 127.0.0.1 localhost and remove all other. your problem will be solved.
Thank you guys for your help :D
If you have your tomcat started (in linux check with ps -ef | grep java) and you see it opened the port 8080 or the one you configured in server.xml (check with netstat --tcp -na | grep <port number>) but you still cannot access it in your browser check the following:
It may start but with a delay of 3-5 minutes. Check the logs/catalina.out. You should see something like this when the server started completely.
INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 38442 msIf you don't have this INFO line your server startup is not complete yet. The problem may occur due to the SecureRandom class responsible to provide random Session IDs and which can cause big delays during startup.
Check more details and the solution here.
Check your firewall (on linux iptables -L -n): You can try to reset your firewall completely iptables -F if you are not into an exposed environment. However, pay attention, that leaves you without protection therefore it can be dangerous.
Check your selinux (if you are on linux).
These are some of the most forgotten and not obvious issues in having your Apache Tomcat up and running.
I am using Eclipse Java EE IDE for Web Developers. Version: Oxygen.1a Release (4.7.1a) in Windows 8.1 x64 with Apache Tomcat 8.5.24 (for testing purpose).
Port Name & Numbers for my Tomcat Server are :
Tomcat admin port : 8005
HTTP/1.1 : 8081 (my Tomcat Listening Port Number)
AJP/1.3 : 8009
Peoples, for those the Tomcat were running good earlier, and sometimes sudden after stopping tomcat server explicitly by pressing the below shown image button or may be other reasons.
Either they continuously failed to start/restart the tomcat with below said error:
Server Tomcat vX.Y Server at localhost failed to start.
or sometimes the Tomcat Server is started but instead of showing Tomcat Homepage in web browser, it is throwing client exception HTTP Status 404 – Not Found. in preferred web browser.
possibly, there are many reasons i.e. wrong Host name defined, Wrong Tomcat Server Locations defined in eclipse, project JDK/JRE version mismatch with Tomcat JRE dependent version, maven project version mismatch due to maven.compiler.source and maven.compiler.target version not defined under properties tag, mismatch version of project facet Dynamic Web Module to 2.5/3.0, Sometimes Tomcat Server is running on Windows Services level, previous stopped Tomcat port number were still listening and the processing pid were not killed in Tomcat defined timespan Timeouts Stop (in seconds): 15(by default) in eclipse and pid still running, failed to start in defined Start (in seconds): XX, etc.
Here I will give the resolution on, how to check and kill the running existing Tomcat port number's processing pid(beware, you must be aware with after effects).
In Windows, open you command prompt, and follow steps(my tomcat HTTP port is 8081):
netstat -ano | findstr :8081
TCP 0.0.0.0:8081 0.0.0.0:0 LISTENING 2284
TCP [::]:8081 [::]:0 LISTENING 2284
if any listening is being there, above command will list details of port listening along with processing pid at last of the line(here pid is 2284).
now kill the running pid like:
taskkill /PID 2284 /F
SUCCESS: The process with PID 2284 has been terminated.
also illustrated the above two steps like following:
Now, after resolving above illustrated reason, start the Tomcat Server.
I had the same issue. My tomcat was started but I was getting HTTP 404 page not found.However, in my situation, I installed tree instances of tomcat. Each instance contains conf, temp, work, webapps and logs folders. Unless I forgot, to copy the global web.xml under conf folder of each tomcat.
e.g: /opt/tomcat/mytomcatInstance/conf/web.xml
The web.xml Deployment Descriptor file describes how to deploy a web application in a servlet container.
So even if my tomcat was up, my web apps could not be deployed properly.
The problems may happen because of memory issue.
java.lang.OutOfMemoryError: Java heap space
please verify the logfile, any issues related to hardware(memory).
Look in TomcatDirectory/logs/catalina.out for the logs. If the logs are too long, delete the catalina.out file and rerun the app.
In my case, the port that tomcat was running on was defined in an application.properties file for 8000, not 8080. In my case, it looked like the same problem described here. Just leaving this here in case anyone has a similar setup and issue! :)
Related
I have a web application running on 10.0.1.62:8080/xxx. I want to debug remotely via IntelliJ IDEA. I have set JAVA_OPTS = -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=8000
on 10.0.1.62 machine(Tomcat7 on Ubuntu) and when I hit the remote debug button IDE is giving an info message :
Connected to the target VM, address: '10.0.1.62:8000', transport: 'socket'
Than I am hitting the 10.0.1.62:8080/xxx.
Although I get this success message brekpoints are not hit. What am I missing ?
Firstly, double check your settings by referencing this question and answer: Remote Debugging in IntelliJ Tomcat
From you question it sounds like you have already followed these steps. There are a few other config problems that have caused me issues with remote tomcat debugging in the past that I'll share and hope it helps.
Be sure you started the proper remote debugging process on IntelliJ.
Make sure you are connecting to the correct Tomcat instance, if there are multiple Tomcat servers running on your host. The debug port 8000 may already be in use. I'm use an arbitrary port of 15019 or some other port number not already in use. Make sure the ports used match between Tomcat and IntelliJ.
Depending on how you setup remote debugging on Tomcat, it may not shutdown properly leaving an old instance running. Adding the debug hooks at the top of catalina.sh will cause the shutdown.sh script to fail because your debug port is already bound to the Tomcat server. Instead place it within the start if statement:
elif [ "$1" = "start" ] ; then
JAVA_OPTS="$JAVA_OPTS -Xdebug -Xrunjdwp:transport=dt_socket,address=15019,suspend=n,server=y"
After fixing this issue, you can shutdown Tomcat successfully with ./shutdown.sh and still start debugging with ./startup.sh
Make sure you have a clean deployment of your application on Tomcat. Your cleanup process may require variations, but here is the general idea:
Shutdown Tomcat, then verify it is no longer running.
Remove the deployed war file and corresponding exploded version from your tomcat webapps directory.
Remove the contents of the work and temp directories.
Deploy and verify your recently build war file.
Start Tomcat.
Creating a script to do this will save time.
If all else fails, add a debug log to double check the code with the breakpoint is being invoked in the first place.
I'm sure there are twenty other things that could go wrong. Feel free to add ideas.
I found following issue whenever i try to run tomcat server with intellijidea. I have tried adding hostname to localhost but didn't work. Any suggestions?
Take a closer look at the server's output, to see the reason, why was Tomcat not started:
java.net.UnknownHostException: nitesh-pc: nitesh-pc
That could mean, that you have a problem with your hosts file (in OS Windows it could be found at {WindowsFolder}\System32\drivers\etc\hosts). You just need to add your hostname to localhost ip-address (don't forget to uncomment it, if needed), like:
127.0.0.1 localhost nitesh-pc
And then try to restart your server again.
I had an issue where Tomcat appeared to have started inside IntelliJ, but when I tried to open the Tomcat homepage I was getting "HTTP 404 Not Found" in the browser.
Starting Tomcat standalone (running startup.bat from the command prompt) started Tomcat and I could see the homepage fine.
I compared the output of running both standalone and within IntelliJ and noticed that CATALINA_BASE was different.
So I created a setenv.bat file in Tomcat bin directory (it was initially not there) and set CATALINA_BASE there like:
set CATALINA_BASE=C:\apache-tomcat-8.5.14
After that, Tomcat starts from IntelliJ and I can access the homepage.
Just putting this out there because I was at a loss why the page was not available when Tomcat seemed to have started OK.
Hope this will help someone.
This may happen if the machine has multiple or changing IP adresses (e.g. when using VPN or Hyper-V, Docker or other virtualization).
The solution is to define the IP address Tomcat should use for RMI:
-Djava.rmi.server.hostname=127.0.0.1
(This is a sane default for a Tomcat running locally, but you’re setup might require a different one.)
This has to be set so it’s applied as a command-line argument for the JVM. This might be in IntelliJ or Tomcat itself (for Linux systems bin/setenv.sh in the Tomcat directory, for a Windows service it’s usually in HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Apache Software Foundation\Procrun 2.0\Tomcat9\Parameters\Java\Options.
I am using Windows 7 OS.
I just installed jaspersoft server which installed Apache Tomcat and mysql as a bundle along with it.
I go to http://localhost:8080 and theres a message that says webpage is not available.
I am a beginner, and I would like to know if Tomcat is first installed on my computer. Can you tell
me how I can do that ? ( I would also like to know if it has to be started and on what
port it was installed.)
UPDATE
Heres something I did . i am really confused now . I found the location of the tomcat server. I found the server.xml file. The port in the server.xml file was listed as 8005. I also found start.bat which I ran. I now see that http://localhost:8080 works but http://localhost:8005 doesnt . Would you know why ?? The port 8005 should work because thats what was listed in the server.xml
The port 8005 is used as service port. You can send a shutdown command (a configurable password) to that port. It will not "speak" HTTP, so you cannot use your browser to connect.
The default port for delivering web-content is 8080.
But there may be other applications listen to that port. So your tomcat may not start, if the port is not available.
You asked "How do you know, if tomcat server is installed on your PC?". The answer to that question is: You can't
You can't determine, if it is installed, because it may be only extracted from a ZIP archive or packaged within another application (Like JBoss AS (I think)).
You can check in windows services if tomcat is installed it will be listed in windows services.
To check the windows service list of services installed on windows machine use
WINDOWS KEY + R and type services.msc
There you can find all the services related with Jasperreport server like Tomcat and MySQL with name starting Jasperreport server Tomcat and MySQL only if these services are installed and its need to be started by selecting the option.Then you can access it through browser using this link :-
http://localhost:8080
default port for tomcat is 8080.
In order to make
http://localhost:8080
work, tomcat has to be started first. You can check server.xml file in conf folder for the port information. You can search if tomcat is installed on your machine. Just go to start and then type tomcat. If it is installed it will give you the directory where it is installed. Then you can select that path and run it from command prompt. Example if tomcat is installed in C:\Programfile\tomcat. You need to set this path in command prompt,go to bin folder and startup. Example: C:\Programfile\tomcat\bin\startup. Else you can also run it by directly going to the path and run startup batch file.
In case of Windows(in my case XP):-
Check the directory where tomcat is installed.
Open the directory called \conf in it.
Then search file server.xml
Open that file and check what is the connector port for HTTP,whre you will found something like 8009,8080 etc.
Suppose it found 8009,use that port as "/localhost:8009/" in your web-browser with HTTP protocol.
Hope this will work !
For linux ubuntu 18.04:
Go to terminal and command:$ sudo systemctl status tomcat
Open your windows search bar, and search for the keyword Tomcat. If a shortcut file is found instead, you can open the source file location of the shortcut by right-clicking the shortcut file and selecting the Properties.
I am trying to run a Java webapp build instance but it stops in the middle of the build with this error:
java.net.BindException: Address already in use:8080
It's obviously trying to bind to the 8080 port but another process has already done so and wont share.
So, I checked to see what process is using the 8080 (netstat -anp | grep 8080). Apparently the jsvc.exec process is listening to my 8080 port. Upon checking (ps -fp) I find out that this is Tomcat (boostrap.jar).
So, to see if the build would at least complete, I killed the process. And yeah!! The Webapp build installed completely. But when I navigated my browser to localhost:8080 it says the service is not running - coz I killed Tomcat! I even tried localhost:8080/manager/list. Still said service not running.
So I restart Tomcat, checked localhost:8080 and Tomcat was back up. Checked localhost:8080/manager/list but did not see the Webapp instance I had just built.
What I am not getting here! My webapp wont build if I run tomcat (cant share 8080). And If i kill tomcat to complete the build, the webapp obviously cant run coz Tomcat is dead.
Please help me. Running Tomcat 5.5 in a LAMP environment on a remote server. NOTE: I am running a pre-built webapp build application (war) which I cant make changes to.
During a build? A build process usually doesn't require a port to be open. The issue is that two programs are attempting to use the same port. Without fixing the underlying issue, the immediate fix is to change the port Tomcat is running on. To change the port Tomcat runs on, edit install_dir/conf/server.xml and change the port attribute of the Connector element from 8080 to 8081.
If this is your first time running Confluence or you have recently added applications or made changes to the system, investigate what's running on port 8080.
If Confluence was not shut down properly, you can restart the machine or kill the process:
On Windows:
Hit Ctrl-alt-delete and look at open programs. Look for {{java.exe}}.
From a command window, run {{netstat -an}}. Check which ports are in use. You can identify which application is running this way, then close it from the Task Manager.
I have started a jetty server in my remote server. But I got problem accessing the default page. I followed the getting started steps and used the command java -jar start.jar to start the server. The port is set to 8080. When I use my Ip http://20.14.228.123:8080/ The site is never found. Do you guys have any clue of what I have done wrong? According to my terminal window it is running.
UPDATE:
sorry I ran wget localhost:8080 and connection failed it says. But I can go in to the default page though. I'm newbie in Java apps deployment, but I exported a war file on my computer and placed it under webapps in the jetty folder is that right procedure? because it don't runs. According to my web.xml in my webapp a servlet is mapped through /Push/GetContacts and when I enter the destination(http://localhost:8080/Push/GetContacts) in my web browser it don't show up?
FINAL:
Never mind I fixed it!
Can you try to run wget localhost:8080 from you server terminal? Just to check that port\ip not blocked somewhere on network layer? It must download html showed by jetty if it actually run...
Q: how do I get the jetty server to not shut down all the time after I close down the terminal?
A: start Jetty as service(process)