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• How to disable Hibernate flooding logs

  - by Warlei

  Hibernate is flooding my IDE console with tons of unnecessary informations at every connection. I already read out the documentation and googled trying to solve this issue but till now the problem "persists". My persistence.xml: ... ... My log4j.xml: ... ... I have no other log4j configuration in my project and even in my environment. Anyone there figured out how to disable the Hibernate console logs? Maybe has something I didn´t understand? I'm using Hibernate 3.5, Tomcat 6.0 and Eclipse 3.3. Thanks in advance.

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• JSP doGet not called from form

  - by RadnaOdela

  I have this code on my JSP page <form action="LoginServlet" method="get"> <input type="text" name="username" /> <input type="text" name="password" /> <input type="submit" value="Submit" /> </form> and when I press Submit I get: The page cannot be displayed The page you are looking for is currently unavailable. The Web site might be experiencing technical difficulties, or you may need to adjust your browser settings. and LoginServlet.doGet method doesn't get called. But then when I press Enter again (in address bar) my doGet method gets called. What is wrong? I am using JEE eclipse and Tomcat

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• Favicon for all the pages in my website

  - by Senthil Kumar

  I've learned that the way to add favicon for a web page is to have the following lines in the page. <link rel="SHORTCUT ICON" type="image/x-icon" href="http://mysite.com/faviconfilename.ico"/> <link rel="icon" type="image/x-icon" href="http://mysite.com/faviconfilename.ico" /> Should i add this code in each and every page my site has?? I use Apache - tomcat clustering to serve pages. Is there any other easy way to do this?

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• Unable to get multiple connection to MySql on Windows 7

  - by Hussain

  I have installed MySql on windows 7 ... issue is i'm unable to get multiple connection to MySql . If I connect to MySql through command line and at the same time open an other MySql command line client it goes into wait state, as soon as I disconnect the first one later one gets connected. Because of above issues I'm unable to run tomcat in debug mode as it tries to get more than one connection to MySql in debug mode. Previously I was using same version of MySql i.e. 5.1 on vista and it was working fine.

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• What is possible causes of Jasper Exception

  - by CitadelCSCadet

  I have a JSP that takes an Arraylist from the session object and removes the items from it. It seemed to be working fine and then out of nowhere when I navigate to that page, the page is blank. I checked the tomcat log files and in catalina.out I am receiving a Jasper Exception an it is showing it as being on a line with the following for(int i; i < agentItems.size(); i++) agentItems is the name of the ArrayList I am using. I have been debugging it and cant seem to figure out what the problem might be. I have read that a JasperException is sometiems thrown as a JSP's NullPointerException. Is this true or am I just completely overlooking the problem? I have the web application running on a local machine and a intermediate server for development in which both of them have had no trouble. Why could it be that only on this server it is giving me problems?

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• How to read log4j output to a web page?

  - by Ran

  I have a web page, used for admin purposes, which runs a task (image fetching from a remote site). In order to be able to debug the task using the browser only, no ssh etc, I'd like to be able to read all log output from the executing thread and spit it out to the web page. The task boils down to: Changing log level for current thread at the beginning of the call and restore when the call is done. Reading all log output by current thread and storing it in a string. So in pseudocode my execute() method would look like this: (I'm using struts2) public String execute() throws Exception { turnLoggingLevelToDebugOnlyForThisThread() ... do stuff... restoreLoggingLevelForThisThread() String logs = readAllLogsByThisThread(); } Can this be done with log4j? I'm using tomcat, struts2, log4j and slf4j.

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• What are the possible causes of JasperException

  - by CitadelCSCadet

  I have a JSP that takes an Arraylist from the session object and removes the items from it. It seemed to be working fine and then out of nowhere when I navigate to that page, the page is blank. I checked the Tomcat log files and in catalina.out I am receiving a JasperException an it is showing it as being on a line with the following for(int i; i < agentItems.size(); i++) agentItems is the name of the ArrayList I am using. I have been debugging it and can't seem to figure out what the problem might be. I have read that a JasperException is sometiems thrown as a JSP's NullPointerException. Is this true or am I just completely overlooking the problem? I have the web application running on a local machine and a intermediate server for development in which both of them have had no trouble. Why could it be that only on this server it is giving me problems?

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• Tool for response time analysis on JBoss server?

  - by Ariel Vardi

  I am running a pretty high traffic cluster of JBoss servers serving REST requests and I am interested in tools reading the access logs in Tomcat format (with %D parameter) to provide a detailed analysis of the response time on a per-call basis. Ideally this tool would generate a chart showing the progression of the response time throughout the day, hour per hour, then a weekly view with averages on the day, and monthly with average on the weeks (CACTI style). I've looked for such tools and couldn't find anything. Is any of you guys aware of something close to that before I start writing my own? I haven't looked into CACTI extensions yet, but that be an option?

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• Web.xml: Are url-pattern tags relative to each other?

  - by sixtyfootersdude

  <servlet-mapping> <servlet-name>myName</servlet-name> <url-pattern>/aName</url-pattern> </servlet-mapping> <security-constraint> <web-resource-collection> ... <url-pattern> /* </url-pattern> </web-resource-collection> ... </security-constraint> This is an excerpt from web.xml (using it to configure a jboss/tomcat webservice). Just wondering if the url-pattern in web-resource-collection is relative to the url-pattern in servlet-mapping.

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• Forward web request for directory index ('/') to an index.htm page in JBoss 4.0.5

  - by The Pretender

  I am using JBoss 4.0.5.GA to run a set of java applications. One of them is a web frontend, using Spring 1.4. URL mappings are configured in a way that 'fake' pages from request URLs are mapped to controllers. That means that when someone requests /index.htm, there's no actual 'index.htm' on disk, and that request maps to a specific conroller which then renders a jsp view. So the problem is as follows: I need to tell JBoss to somehow forward all requests for directory indices to corresponding 'index.htm' URLs like so: / ? /index.htm; /news/ ? /news/index.htm; /foo/bar/baz/ ? /foo/bar/baz/index.htm and so on. I can't use Tomcat's welcome-file-list feature because it looks for those files on disk, while all 'index.htm's are fake and don't actually exist on disk.

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• Servlet's doGet not called from JSP form

  - by RadnaOdela

  I have this code on my JSP page <form action="LoginServlet" method="get"> <input type="text" name="username" /> <input type="text" name="password" /> <input type="submit" value="Submit" /> </form> and when I press Submit I get: The page cannot be displayed The page you are looking for is currently unavailable. The Web site might be experiencing technical difficulties, or you may need to adjust your browser settings. and LoginServlet.doGet method doesn't get called. But then when I press Enter again (in address bar) my doGet method gets called. What is wrong? I am using JEE eclipse and Tomcat

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• web service and its configuration file

  - by qkrsppopcmpt

  I implemented one service and it has several configuration item, such as data type, next node, blablabla. What I want to do is to deploy the service and configuration file into tomcat within one .aar. However, if I jar the service and configuration file into the aar. The service can't read the file though the file is there in the same directory. Even I put the file into tomcat_home\bin, the service fails to read the file. I know it should work. Can anybody give me a hint? Thanks.

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• Please clarify a few points concerning Java Servlets

  - by EugeneP

  suppose, I use Tomcat as a web container. Is it true that once all the servlets found in a web-app/WEBAPPNAME are init(IALIZED) then every change of a Servlet's property will be seen to every session. So session 1 changes a property userName of a Servlet1 from "user1" to "user2" session 1 is closed. session 2 starts. It will see "user2" as the only value of Servlet1.userName property?? Any change of a Servlet's field will be seen to all subsequent sessions? Are servlets singletons, aren't they?

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• Best practice for handling memory leaks in large Java projects?

  - by knorv

  In almost all larger Java projects I've been involved with I've noticed that the quality of service of the application degrades with the uptime of the container. This is most probably due to memory leaks in the code. The correct way to solve this problem is obviously to trace back to the root cause of the problem and fix the leaks in the code. The quick and dirty way of solving the problem is simply restarting Tomcat (or whichever servlet container you're using). These are my three questions: Assume that you choose to solve the problem by tracing the root cause of the problem (the memory leaks), how would you collect data to zoom in on the problem? Assume that you choose the quick and dirty way of speeding things up by simply restarting the container, how would you collect data to choose the optimal restart cycle? Have you been able to deploy and run projects over an extended period of time without ever restarting the servlet container to regain snappiness? Or is an occasional servlet restart something that one has to simply accept?

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• I changed the web service declaration and then wsimport says that I have a repeated message

  - by Oso

  I had a Web service method working fine on Tomcat as deployed by Netbeans 6.8. Then I had to add a new parameter for the same method so I erased the method and then added a new one with the same name but different parameters. After that, ws-import keeps on telling me that I have duplicated messages for such method, and if I remove the new one, the WSDL will still show me the old one with the old parameter list. How do I get rid of the old one? thanks in advance.

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• Which application server should i choose for my project ?

  - by Dimitri

  Hi folks, I am currently developing an application for some researchers in my university.It's a small java program that you can use by command line. The next step is to package that program and deploy it to an application server. Some clients program will submit requests to the server who will call the tool that I wrote. Lately, we will add more tools to the server and he has to dispatch the requests to the right tool. Which application server fits my needs ? I have looked for Tomcat, Jetty and Glassfish but it seems that they are only used for web application. Is it possible to use those servers in some context different from web context? Which package archive should i use (jar, war) ? Any advice?

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• How can I emulate forward on 404 in jersey?

  - by koppor

  I have a picture on a given URL. The picture might need a referesh. I want to do the freshness-check at the time of the request. Therefore, I coded a jersey resource handling the request on the picture URL. It refreshes the picture on the filesystem if necessary. I do not want to re-code a caching mechansim, but rely on tomcat's implementation. Therefore, I would like to "forward" the request in the internal handler chain. I tried return new Viewable(sb.toString());, but a viewable is not a picture. What return type can I use? I could let the concrete picture reside on another URL and send a 307 (Temporary Redirect). Always sending that as answer seems odd to me. Related question: How to return a PNG image from Jersey REST service method to the browser

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• How to add response headers based on Content-type; getting Content-type before the response is commi

  - by Bozho

  I want to set the Expires header for all image/* and text/css. I'm doing this in a Filter. However: before calling chain.doFilter(..) the Content-type is not yet "realized" after calling chain.doFilter(..) the Content-type is set, but so is content-length, which forbids adding new headers (at least in Tomcat implementation) I can use the extensions of the requested resource, but since some of the css files are generated by richfaces by taking them from inside jar-files, the name of the file isn't x.css, but is /xx/yy/zz.xcss/DATB/.... So, is there a way to get the Content-type before the response is committed.

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• Web.xml: Are url-pattern tags relitive to each other?

  - by sixtyfootersdude

  <servlet-mapping> <servlet-name>myName</servlet-name> <url-pattern>/aName</url-pattern> </servlet-mapping> <security-constraint> <web-resource-collection> ... <url-pattern> /* </url-pattern> </web-resource-collection> ... </security-constraint> This is an excerpt from web.xml (using it to configure a jboss/tomcat webservice). Just wondering if the url-pattern in web-resource-collection is relative to the url-pattern in servlet-mapping.

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• What's a good FOSS java servlet session replication solution

  - by Bossy Joe

  I work on a very high volume public website running on Tomcat 5.5. Currently we require stickiness to a particular server in order to maintain session. I'd like to start replicating session, but have had trouble finding a good FOSS solution. I've written my own Manager (using memcached as the store) but am having trouble dealing with race conditions if more than one server is handling the requests for the same user. Is there a solution out there I should be looking at? I'm looking for not just something that works as a fallback if stickiness fails, but that would work if user requests are regularly spread to multiple servers.

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• JAR file folder for eclipse projects

  - by Daff

  I'm trying to create a centralized folder (in some kind of a "meta project" in my eclipse workspace) for commonly used JAR files for referenced projects in this workspace. It should work similar to the WEB-INF/lib folder for web projects but also apply to non web projects, and automatically scan and add all jar files in this folder. I tried to create a user library with these jar files and reference them in the project but I still have to add every new jar manually to the user library (and don't know if it is referenced relative of absoulute) and Tomcat (WTP) doesn't seem to take these files (Run As - Run on Server) into its classpath (and I don't want to duplicate the jars and put them into WEB-INF/lib). Any ideas?

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• JAAS : on Callback ( Interesting based on HTTP headers )

  - by VJS

  I am using NameCallback and PasswordCallback for username and password.For username and password, popup comes on browser and when i enter username ans password, JAAS authenticates my request. On the wireshark, I have seen that 401 Unauthorized message (WWW-Authenticate header)comes and when i enter username/password HTTP request with credentials generate ( with Authorization header) and goes to server. My requirement : I don't want pop up to come.My application on other server having username / password, so once it received 401 then based on some logic it will generate HTTP request with Authorization header / credentials and sent it back. FLow : User - Other Server - My Tomcat5.5 Here on Other Server, nobody is available to enter username/password manually.Application is deployed and it will only generate HTTP request with credential and sent it back to tomcat. Can we have any other callback which behave like this.Need your help.Please provide me feedback as well related to approach.

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• Tomcat is web server or application server?

  - by Suresh S

  please let me know !!

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• how to set auto redirection in tomcat

  - by Registered User

  I have a site http://social.openitup.in right now what you are seeing is a default Tomcat6 page. I am using mod_ajp as a front end and Apache vhost configuration for same is <VirtualHost *:80 > ServerName social.openitup.in ServerAdmin webmaster@localhost ProxyRequests off <Proxy *> Order deny,allow Allow from all </Proxy> ProxyPreserveHost On ProxyPass / ajp://192.168.1.19:8009/ ProxyPassReverse / ajp://192.168.1.19:8009/ </VirtualHost> How ever I have an application running on it http://social.openitup.in/olat what I want to do is when some one opens http://social.openitup.in then rather than seeing Tomcat6 home page from /var/lib/tomcat6/webapps/ROOT/index.html the person is redirected to olat application which is in /var/lib/tomcat6/webapps/olat how can this be achived? The above vhost configuration is on a machine separate than where OLAT is running.

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• Debugging info for authentication in tomcat

  - by Tom A

  I have a JDBC realm setup and a web-app using basic authentication, but I can't get it to work. It is putting up the password dialog but it never succeeds. If I could get the authentication process to spit out some logs, I would be fine. I have debug="99" in my realm specification but I see nothing getting logged in the usual places. Am I missing something?

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