Avoid start/stop tomcat when changes made in servlet

How can I make changes made in servlet available without redeploying the application to tomcat.
I am using tomcat 4.xx and running a web application under it, and I do not want to stop/start tomcat everytime I make changes in servlets and compile them....any ideas I remember there is solution,,but dont remember the solution itself..:)

Look for defaultcontext tag in your server.xml in conf directory. set "reloadable" attribute if this tag to true...
<DefaultContext reloadable="true"/>

Similar Messages

Is there any way to avoid stop/start of tomcat when a java file is modified

Hi all,
we are developing a tool where we use java files for mediation layer and jsp files for presentation layer. so whenever i do a change in any of my java source i need to stop/start the tomcat in order to get the latest change.
is there any way to avoid this kind of stop/start.... i want the changes to get reflected immediately after i compile the file.

hai ,
i wrote a sample test.jsp and TestJava.java file and i tried callin api getValue() in TestJava.java from test.jsp.then i did some modifications to this api i.e., i changed the return type from String to int . then compiled n also touched the file but the changes didn't get reflected instead i got the followin error.
Location: /support/jsp/test.jsp
Internal Servlet Error:
javax.servlet.ServletException: com.adventnet.itm.common.TestJava: method getValue()I not found
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:508)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
     at org.apache.tomcat.core.Handler.service(Handler.java:287)
     at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
     at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:806)
     at org.apache.tomcat.core.ContextManager.service(ContextManager.java:752)
     at org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection(Ajp12ConnectionHandler.java:166)
     at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
     at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
     at java.lang.Thread.run(Thread.java:475)
Root cause:
java.lang.NoSuchMethodError: com.adventnet.itm.common.TestJava: method getValue()I not found
     at jsp._0002fjsp_0002ftest_0002ejsptest_jsp_3._jspService(_0002fjsp_0002ftest_0002ejsptest_jsp_3.java:63)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.jasper.servlet.JspServlet$JspCountedServlet.service(JspServlet.java:130)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:282)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:429)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:500)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
     at org.apache.tomcat.core.Handler.service(Handler.java:287)
     at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
     at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:806)
     at org.apache.tomcat.core.ContextManager.service(ContextManager.java:752)
     at org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection(Ajp12ConnectionHandler.java:166)
     at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
     at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
     at java.lang.Thread.run(Thread.java:475)
kindly help me ASAP.......
Tanxxx in advance,
Ani

Allow normal user to start/stop Tomcat

Hi,
Recently I deployed a web app at client's pc running on WinXP SP2. However, I'm not allowed admin rights to that local machine. Is there a way to allow normal user ( like my case) to start/stop Apache Tomcat services without requesting my client to log in as admin to perform this simple task?
Thanks.
Z

salafrance wrote:A simple way would be to write a small C program to run systemctl setuid root.
So perhaps like this?
#include <stdlib.h>
#include <unistd.h>
int main(void)
execl("/usr/bin/systemctl", "systemctl", "start", "calibre", NULL);
return(EXIT_SUCCESS);
compiled it, then "chown root:root test", "chmod u+s test" and it worked.
But is this safe? I have absolutely no knowledge about potential security issues...
I also have thought about periodically restarting calibre, but on the Raspberry Pi, with it's slow ARM, the start takes ages and the processor is completely busy with that task for some minutes.
And that's the reason why I also want to avoid starting an entire second systemd session... Or is this not that resource intensive?

Worth it? Auto start/stop services and change iptables rules

I have recently set up a crontab to start/stop services based on my schedule, such as when I'll be home or away. I intend to only have a service running when I'll probably use it.
I also integrated rules for iptables into the start/stop of the services (systemd), so they automatically modify rules to accept/reject on their ports when the services start/stop.
I am behind a router, so I only forward outside ports I use like ssh (which is not on port 22). I manually forward ports, but am looking at UPnP. This is my home network so I should be able to trust the devices on it.
Now, to my question. Is it worth the time and effort to set this up? Would it be fine to just enable the services I use, let them run and always have firewall ports open for them? I feel like it's good to limit the time that ssh is running, but what about services not open to the Internet? Resources aren't really an issue. What do you guys think?
I enjoyed learning about systemd, iptables, and cron in the process of setting it up. I'd just like to also learn about how much benefit there actually is, or if anyone has other ideas. Or if it's something that could go on the wiki (not really cron, but maybe the iptables/systemd stuff).

I'd say, if resources aren't an issue; why limit the time ssh is reachable from the outside? You should have PasswordAuthentication and RootLogin disabled anyway so your vulnerability doesn't really decrease by updating iptables? This script probably works fine until you forget about it and it makes a boo-boo; making your machine unreachable.

JSTL stops working when I add a servlet

Can anyone help me?
My JSTL tags stop working when I add WEB.XML to WEB-INF folder in Tomcat 5.
The following is an example code, I get '${test}' when I use the WEB.XML file, when I remove the file and restart the server I get 'hello test'.
Here is the HTML :

<%@ taglib uri="/WEB-INF/tld/c.tld" prefix="c" %>
<c:set var='test' value= "hello test" />
${test}
<html>
<head><title>list review bottom frame</title>
<link href="../properties.css" rel="stylesheet" type="text/css">
</head>
<body bgcolor="#0000FF">
<form method='post' action="/servlet/servlet/FtpResiduals" >
<table width="100%" border="0">
<tr><td align="center"><input name="FtpResiduals" type='submit' class="button1" value="Transmit File">
</td></tr>
</table>
</form>
</body>
</html>
Here is the WEB.XML file :
<web-app>
<servlet>
<servlet-name>FtpResiduals</servlet-name>
<servlet-class>FtpResiduals</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>FtpResiduals</servlet-name>
<url-pattern>/servlet/FtpResiduals</url-pattern>
</servlet-mapping>
</web-app>
By the way the servlet works fine.
Mark

I quickly threw this code together to try to describe
by problem. I didn't think it was prudent to post all
the code in my web app. (servlet happens to be the
context path, and I just threw the tag in to duplicate
the problem I'm having).Prudence is your call, but nobody will be able to help unless they can see what the problem is.
It's a difficult call, because posting too much will scare people off, too. (I know I don't want to read your entire app.)
The log doesn't really help.Neither does this post.
Needless to say, you've got a deployment problem. Tomcat 5.0 works; so does the JSTL 1.1 tag library. You're doing something wrong.
If you've never used JSTL before, I'd recommend that you read something serious, like Hans Bergsten's O'Reilly book on JSPs. He writes it entirely in terms of JSTL, because that's what people should use from now on. I think his 3rd edition even has the JSTL 1.1 tag library.

Intel Rapid Start stops working when RAM upgraded

I have a brand new ENVY dv7-7212nr notebook running Windows 8 64-bit.
This machine has Intel Rapid Storage Technology which caches hard disk data (I think on the 32GB SSD) and Intel Rapid Start Technology which stores active memory in the SSD cache (I think) when the computer enters a hibernation state.
The first thing I did was upgrade the RAM from 8GB to 16GB. It works fine, but then I get an error message "your system does not appear to have intel rapid start technology enabled."
HP provides very little information on this, basically none. I assume the memory is being cached on the SSD, but I don't know how to verify this. Also I notice that acceleration is not enabled under the Rapid Storage Tecnology applet for either drive.
I called tech support twice but the techs knew nothing about upgrading RAM beyond the usual and couldn't get it to work either.
Does anybody even know exactly how the SSD is being used in my system? That would be valuable information to me.
Thanks in advance!
This question was solved.
View Solution.

Thanks for reading my reply.
The "little SSD" is still a drive and not a chip, although you are right that it is little and it is attached to the motherboard. It is little because its form factor is not the typical 2.5 inch size but what's call "mSATA". In fact, the service manual for this dv7-7212nr laptop shows you how you can remove and replace or upgrade this mSATA SSD:
Below is a comparison of how small the mSATA form factor is to other drive sizes (from Left to Right: mSATA, 1.8", 2.5", 3.5"):
So if I want to replace the mSATA 32 GB SSD with a 64 GB SSD, I would have to get a mSATA SSD, not the typical 2.5" ones. So for this dv7-7212nr laptop, there can be 3 total drives installed: one in the mSATA slot and two in the 2.5'' drive bays. However, the default configuration as sold by HP only has one mSATA 32 GB SSD and one 750 GB SATA hard drive, with the remaining drive bay empty.
This dv7-7212nr laptop does contain all the latest (and perhaps more complex) technologies and HP probably does not expect the typical user/consumer to go and muck around all the default settings. However, if one is curious and willing to make the effort to learn, the material is just a google search away.
Here are the instructions for setting up Intel Rapid STORAGE Technology (aka Intel Smart Response Technology): http://download.intel.com/support/chipsets/sb/intel_smart_response_technology_user_guide.pdf
For this dv7-7212nr laptop, you can ignore steps 1-4 because the BIOS is already configured properly from the factory (unless some changes were made by the end user).
Here are the instructions for setting up Intel Rapid Start Technology:
http://download.intel.com/support/motherboards/desktop/sb/rapid_start_technology_user_guide_v11.pdf
For this particular laptop, ignore steps 1-7 but it is important to do this first: set up Intel Smart Response Technology as above, making sure to allow enough space on the SSD for a hibernation partition that is equal to or greater than the total size of RAM installed. Then follow steps 8 to the end of the guide. It is important to set up Intel Smart Response before Intel Rapid Start because Intel Smart Response will destroy all partitions and data on the disk (if you set up a hibernation partition for Intel Rapid Start first, it will be removed when you set up Intel Smart Response).
I have successfully ENable and DISable these technologies on my laptop using the above guides (with my modifications). WARNING: back up all data before trying any of this.
In your case, I agree that you can also disable Rapid START and just use the whole SSD for acceleration along with the 16 GB RAM upgrade.
[Edit: update link]

How can I get my phone to stop deleting my changes made in Address book without deleting the changes made on the iPhone?

On my old Macbook whenever I would sync my iphone, if I had changed something on the calendar it gives me the option to choose between the computer event or the iphone event (so lets say I'm out and I changed the time of my appointment on my phone, when I get home and sync my phone I choose to keep the time I changed it to on my phone, not what's on my computer).
Now... what's happening is I'm getting the message: syncing your contacts will change more than 5% of the contacts on the COMPUTER. So that means, all the bulk changes I just made in address book on the computer are going to get deleted and replaced with what is originally on the phone. That's not what I want. I want to change what's on the phone with the changes I made on the computer in address book. Make sense? How do I do that? Because I don't necessarily want to wipe out everything on the phone because I don't know if that has been transferred to the address book... So If I added some phone numbers within the last month (i don't remember the last time I synced my phone), then I would loose them if I chose to replace information on the phone with what's on the computer (there's an option to do that under info when syncing).
Does that make sense? Please let me know it this is at all confusing. I'm really trying to resolve this before Saturday early morning ... My mom is going out of town and it's her work phone, so I need to figure this out for her. Thanks a bunch!

mnjclark,
I'm glad to hear that you have found a work-a-round so that your device works while making calls meanwhile being connected to Bluetooth to your automobile.
At this time, based on the way the device was manufactured, there is no setting available that will allow this change to be permanent. When the device is rebooted, the settings may be adjusted which will require you to manually change back to CDMA only mode if needed.
EfrainM_VZW
Follow us on Twitter @VZWSupport

How to implement start & stop triggers when # scans unknown on ni5112?

I want to initiate a data capture trigger on the leading edge of a pulse & then stop the trigger on the next leading edge of the same pulse, using NI 5112 Scope card & LabVIEW v5.1. How to accomplish?? Any help appreciated!

You can implement a start and stop trigger but not with an arbitrary number of points.
The 5112 has two triggers the Acquisition Arm and the Record Arm.
The Acquisition Arm trigger enables the Scope to start taking pretrigger data.
The Record arm trigger is often call the Stop trigger or Reference Trigger. Based upon the Reference Position the board will acquire X pretrigger samples and Y post trigger samples. The Reference trigger defines the transition from pre to post trigger. If you set all of your points to be pretrigger (i.e. 100% reference position) then the Reference trigger will stop acquistion on the trigger. One thing to note: the scope will not be ready to accept the record trigger until it has acquired all the pretrigger points. The scope
will only return one record size of data. Therefore the first samples will be lost.
For example I would like to start a acquisition with a trigger on PFI 1 and use edge triggering on channel 0 to stop the acquisition. I need at least 1000 points.
You will need to make the following changes in the code. Start from the niScope EX Configured Acquisition.vi and set up the triggering for Edge Trigger. Set your minimum record size to 1000 samples. On the diagram go to the Edge Trigger Case of the Triggering Selection Case Structure add a property node before the configure edge trigger similiar to the attached screen shot. Change the property to Acquisition Arm Source found in the synchronization menu. Change the property to write and create a string constant. The available sources for the Acq Arm are PFI 1,2 and RTSI 0-6. The syntax needs to match the following: "VAL_PFI_1". You will miss the edge trigger if you have not already acquired 1000 samples from the acquistion trigg
er and you will only get back 1000 samples.
Good luck and let me know if you have any questions.
Mike Taylor
Attachments:
acqarm.jpg ‏66 KB

How to avoid thread stops ? ( when try to read sockets inputstream ...)

Hi ,
When I try to call :
Socket sok=new Socket (adres,poort);
the thread looks to stop...
How to avoid this ?
Thx for tip etc !

Take a look at NIO:
http://www.google.com/search?num=100&hl=en&c2coff=1&q=non-blocking+java+socket

Approval Procedure to be sent when changes made in Purchase Order

Hi Everyone,
Can anyone help me with query for approval terms as follows:
I want an approval to be triggered when the changes are made in Purchase Order & Updated. Not when new PO is created but at the time of when once the PO is created & then its edited by purchase employee and again gets updated then approval should be triggered to Accounting Department.
Regards,
Jai

Hi,
You have to develope an own ABAP report for this, based on the change tables CDHDR and CDPOS
CDHDR - Header Change
CDPOS - Item Change
EREV - Version Change
Check the link
Purchase order change log
Regards
KK
Edited by: Kishore Kumar Galla on Apr 5, 2010 1:16 PM

Forms inserts rather update on commit_form when changes made in records

I have created a form in forms builder 10g. These are 3 tables.
1. Recovery_Shift (Production Shift Information) -- Parent Table
2. Recovery_Size (Many Size in one Production Shift) -- Child to Table- 1
3. Recovery_Size_Dtl (Details of the Size Recovered) -- Child to Table- 2
The form has been created using 3 datablocks correpsonding to the above tables in two canvases.
In second canvas I have a "Save" Push Button with code "Commit_Form". Whenever I am inserting first time it is ok. After pressing this push button if I make any changes in any record and press the Save button, forms shows unique constraint error. When I disable this constraint in table. The form inserts a new duplicate row in the table.
The problem is ==>if I make any changes in the form after pressing "Save" button (Commit_form) it inserts the whole row rather updating the row.
What could be the cause and solution. Please guide. The module is at implimentation stage. Thanks in advance for guidance.
Tables for your references.
Table - 1. Recovery_Shift
SHIFT_ID----------NUMBER(10,0)     --> PK
RECOVERY_DATE-----DATE
SHIFT-------------VARCHAR2(1 Bytes)
SHIFT_START_TIME--DATE
SHIFT_END_TIME----DATE
SUPERVISOR--------VARCHAR2(6 Bytes)
OPT---------------VARCHAR2(6 Bytes)
ENTRY_BY----------VARCHAR2(6 Bytes)
ENTRY_DATE--------DATE
VALIDATE_BY-------VARCHAR2(6 Bytes)
VALIDATION_DATE---DATE
SHIFT_MINUTE------NUMBER(10,0)
Table - 1. Recovery_Size
SIZE_ID-----------NUMBER(10,0)     --> PK
SHIFT_ID----------NUMBER(10,0)     --> FK
REJ_STAGE---------VARCHAR2(2 Bytes)
ITEM_SIZE---------NUMBER(7,2)
ITEM_CLASS--------NUMBER(4,2)
ITEM_GROUP--------VARCHAR2(2 Bytes)
ITEM_QUALITY------VARCHAR2(3 Bytes)
RECOVERED_MTR-----NUMBER(10,2)
RECOVERED_TON-----NUMBER(10,3)
AUCTION_MTR-------NUMBER(10,2)
AUCTION_TON-------NUMBER(10,3)
ITEM_SPEC---------NUMBER(2,0)
Table - 1. Recovery_Size_Dtl
SIZE_ID-----------NUMBER(10,0)     --> FK
LEN_MIN-----------NUMBER(4,2)
LEN_MAX-----------NUMBER(4,2)
REC_AUC-----------VARCHAR2(1 Bytes)
PCS---------------NUMBER(10,0)
MTR---------------NUMBER(10,2)
TON---------------NUMBER(10,3)
SEGMENT-----------VARCHAR2(1 Bytes)
Message was edited by:
Vinay Pandey

for inserting a row it asks for commitThat is normal behavior. When you update or create a record in the Recovery_Size_Detail block, you must commit the record before working on another record.
I think it may be the cause of problem that there are already saved (commited)records in the form when i am entering more records in 2nd & 3rd table and commiting them.If you are creating new records after the commit, and these new records are duplicates in the database, then the unique constraint error is expected. If you want to ensure the user is not creating duplicate records before trying to commit, then see this:
http://sheikyerbouti.developpez.com/duplicates/duplicates.htm
You might try creating the form with just two blocks:
First block (master): Recovery_Shift
Second block (detail) Recovery_Size
Get that to work and test it by updating and creating records. After you are pleased that it works, save it and then add the 3rd block as a detail block for the the 2nd block. Then you have this:
Block1. Recovery_Shift (master)
Block2. Recovery_Size (detail for block 1 and master for block 3)
Block3. Recovery_Size_Detail (detail for block 2)

SQL Server Management Studio has stopped working when changing fonts and colors

I installed sql server management studio 2012 about 3 months ago to test drive and from time to time I'll attempt to change my background color of the TSql editor "In the fonts and colors option under tools"; however, the entire studio crashes
and restarts.
This has been ongoing since I first installed it 3 or 4 months ago, and have waited on posting to a fourm for help, assuming I am not the only one this is happening to I've waited for an update that might fix the issue.
I've got to start on some heavy scripting and that god awful white background kills my eyes. I've got to have a black background or my work day is cut off by about 3 hours becuase of strain.
What can I provide to someone that would help me with this?
Thank you,
Erik
Specialize in software for the construction industry.

Hello,
Could you please apply the following updates and let us know the results?
http://www.microsoft.com/en-us/download/details.aspx?id=35575
http://support.microsoft.com/kb/2790947
Hope this helps.
Regards,
Alberto Morillo
SQLCoffee.com

Can we avoid the dialogue box when changing brushes?

I am very new to Photoshop... like three days old and there is so much to learn I wonder if I ever will!
This is probably a laughable question to experienced users but I wonder if it is possible to not have this dialogue box pop up each time I switch brush sets?
Regards,
Chrissie

One way is to hold down the Alt key at the same time you choose the new brush library.
I don't think anyone ever learns everthing there is to know about photoshop.
I can only speak for myself, but i'm always learning new ways to do stuff in photoshop.
MTSTUNER

How to avoid starting of workflow ?

hi there,
i have a problem:
on BO BUS2089 (Travel) i have a event 'CREATED'
on that event i have a workflow. everytime the event is raised the workflow starts. so far so good, BUT:
i ONLY want to start the workflow when the travel-request is created in portal (ESS).
But there is a direct way in backup where traveling-requests are entered by administration.
how can i handle this to avoid starting the workflow when it is done in backend system (HR) ?
reg, Martin

Martin,
You should be able to identify the program that is triggering the event. Take a look into the SY-CPROG. I am not absolutely sure, if this is the correct field, but check/compare all the fields in SY structure. There should be a difference between creating/changing the trip in ESS (with the web dynpro application) and creating/changing the trip in backend transaction.
If you can find the difference, it should be an easy task to prepare a check function module for the CREATED event to prevent the workflow starting in the specific circumstances.
There are probably also other alternatives, but this is something you should definately check.
Regards,
Karri

STARTING UP TOMCAT ON REMOTE WIN2000 SERVER

Hi all,
i have the following problem and i was wondering if any of you has ever come across the same problem as me. I am trying to setup a server/client network. As you can imagine i need to startup tomcat by accessing the actual server machine from my own pc. however, as the startup is a batch file it cannot start up tomcat when you click on it from a different machine that does not have tomcat installed on it. Therefore it is unable to start tomcat remotely. Since, i also need to restart tomcat anytime i do any alterations on any of my files there is no way i can be physically going to the server room and restarting Tomcat manually.This is out of the question.
Has anyone got any ideas as to how there is a way (if any) to start tomcat remotely on a win 2000 server machine?? By the way the version of tomcat i m using is Tomcat 4.1.29
Please help

Do i need to download a specific software for this
application or does it come built in with tomcat?I am suggesting that you use Secure Shell to execute remote OS commands.
This has nothing to do with java or tomcat.
I have used the OpenSSH server (sshd) that comes with cygwin.
You can get it from here http://www.cygwin.com just click there setup.exe install the default installation. You'll have some extra work to do to get the sshd to run as a service on your windows 2000 box, but it isn't as difficult as it use to be. Here's a good link http://tech.erdelynet.com/cygwin-sshd.html
On your local system you can install cygwin and use its ssh clients (ssh/scp/sftp) or you can install something called PuTTy. Just do a google for PuTTy and you'll be able to figure it out.
I have used both PuTTy and cygwin's clients.
Can you be more specific on that .bat file i need to
create???Well a batch file as you know is just a file containing a series of command-line commands.
Once you got all your secure shell stuff installed and configured just work out what commands you wish to issue and store them in a .bat file.

Avoid start/stop tomcat when changes made in servlet

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