No of threads for a servlet

1. Is there any limit on maximum no of threads that would be created for a servlet by default? (I'm using Tomcat 3.2) If yes, what is the value of this limit?
2. How can I change this limit in Tomcat 3.2? Is there any difference in the configuration of this limit for Tomcat 3 and Tomcat 4?
3. If I increase the maximum no of threads, what OS level limitation would I need to take care of? Like default socket close timeout or what else ...
Ankit

Look in the server.xml file. If you are running tomcat in standalone on port 8080 search the server.xml file for '8080'. Here you will find the configuration options for the connector. The maxProcessors and minProcessors setting set the number of threads that tomcat will use for requests on this connector.
For more information check the tomcat documentation.

Similar Messages

Same thread for ServletRequestListener and Servlet request?

Does ServletRequestListener methods execute in the same thread that the Servlet.service method?
I wonder if the answer is always 'yes'. And I hope it will. I've been reading the specs but found nothing related.
I think it's an important issue because this way you can take advantage and share data between listener and request in a ThreadLocal object for a request.
Can anyone help me?
Thanks in advance.
Message was edited by:
pucherico

I've checked it up for Tomcat (version 5). I can say it is true for Tomcat: For a given request, the service method and request listeners are executed in the same thread. But who can say this is true for all Application Servers....! and who can say it will be true for future version of Tomcat!
Because of the lack in the spec (I haven't found any comment on this subject) I am still not sure if I can rely on this property!

How to install eclipse and MyEclipse and use it for jsp-servlet-web service

hi ,
please help me to install eclipse 3.1 and How to integrate MyEclipse to do jsp-servlet programming and web services.
please also help me to include application server like tomcat and axis and use that environment in MyEclipse ide.
please help me.....

At the time of installation , you can't change SID XE.
After installation, you can add another service name
Check following thread for more details
Re: How to create service on Oracle 10g XE
- Virag Sharma
http://virag.sharma.googlepages.com
http://viragsharma.blogspot.com

Thread management in servlet

Here is the problem that i am trying to solve - and get better understanding of issues to look out for.
1) Problem to solve
Clients sends an http request to an distributor server. The request contains a list of tasks. Each such task can be sent to a particular handling server (out of a known set) which can handle the request. Each task has a task type, which identifies which server the request needs to be passed to. The responses from the handler servers are then to be collected and passed back the client as a consolidated response.
On the distributor server, the servlet thread that is handling the request will
a. need to spread the requests for various handling servers
b. send the requests in parallel to handling servers
b. get all the responses , consolidate and send back
2)Proposed solution
I was thinking of having a thread pool - one thread for each handling server, initialized within servlet . When the distributor server receives a request - the tasks would be spread to these handling threads. The distributor thread would then wait, until the handling threads notify.
When a notification is received - the distributor thread will need to check if all responses are received. If not - it would need to wait (till a max_timeout) else return the response to client
3)Questions
- This involves waiting on the thread created by serlvet container (the distributor thread) and creating a threadpool. Thread creation and management by application in web-container is generally dissuaded - but given this issue - i see no other alternative
suggestions ? Its been a long email - thanks for considering
Fred

How many clients for the entry server do you presume for the application ? I ask this because it is very possible that the server to remain without available threads and give errors. If you use different servers for the final requests I suppose that are some very time consuming processes. What kind of application are running on these servers so that you want to use this kind of distributed computing ?
Why did you choose as an entry point a servlet container and http request for this kind of problem ? Do you need a graphic response in the browser ? If the response time is too long, the browser (Internet Explorer) will show exception and will not wait for the response (for this you must set some variabiles on client). Also the J2EE server must be set so that not to throw a time-out exception.
To prevent these, you could do so that not to block the distributor thread and let it send the answer back to the client. Then you can tell to client browser to query the server from time to time to check the status of the execution (you can do that from javascript). When the execution is ready you can retrun the response to the client. Doing this way you will not block the application server threads.
Now in the back end, you must somehow to take some identificators from the processes and sent them back to the client.
You can use a database to make the bridge between the central server and the other processes (here you can put the processes identificators). When the processes end up they update their results in the database.
The client, when will make the repetitive requests, will check the status of the processes in the database with given identificators.
Sounds like an interesting project.

Class not found for Startup servlet

I have deployed a war file under weblogic 7. The application has some startup servlets,
which are failing to load during startup. It returns the following error messages
for each servlet
####<Jan 8, 2003 2:00:25 PM CST> <Error> <HTTP> <abc-web1> <abcAppServer> <Thread-8>
<kernel identity> <> <101249> <[ServletContext(id=3959381,name=abcApps,context-path=/abcApps)]:
Servlet class com.abc.servlets.startup.StartupTSContentDaemonServlet for servlet
StartupTSContentDaemonServlet could not be loaded because the requested class
was not found in the classpath D:\bea\user_projects\abcdomain\abcAppServer\stage\abcApps\abcApps.war;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\servlet2373.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\jbcl2374.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\jaxp2375.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\xerces2376.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\AS4002377.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\decrypt2378.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\cls2372.jar.
java.lang.UnsupportedClassVersionError: com/abc/servlets/startup/StartupTSContentDaemonServlet
(Unsupported major.minor version 48.0)>
####<Jan 8, 2003 2:00:25 PM CST> <Error> <HTTP> <abc-web1> <abcAppServer> <Thread-8>
<kernel identity> <> <101216> <Servlet: "StartupTSContentDaemonServlet" failed
to preload on startup in webapp: "abcApps">
javax.servlet.ServletException: [ServletContext(id=3959381,name=abcApps,context-path=/abcApps)]:
Servlet class com.abc.servlets.startup.StartupTSContentDaemonServlet for servlet
StartupTSContentDaemonServlet could not be loaded because the requested class
was not found in the classpath D:\bea\user_projects\abcdomain\abcAppServer\stage\abcApps\abcApps.war;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\servlet2373.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\jbcl2374.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\jaxp2375.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\xerces2376.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\AS4002377.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\decrypt2378.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\cls2372.jar.
java.lang.UnsupportedClassVersionError: com/abc/servlets/startup/StartupTSContentDaemonServlet
(Unsupported major.minor version 48.0)
     at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:785)
     at weblogic.servlet.internal.WebAppServletContext.preloadServlet(WebAppServletContext.java:2763)
     at weblogic.servlet.internal.WebAppServletContext.preloadServlets(WebAppServletContext.java:2708)
     at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:2681)
     at weblogic.servlet.internal.HttpServer.preloadResources(HttpServer.java:552)
     at weblogic.servlet.internal.WebService.preloadResources(WebService.java:476)
     at weblogic.t3.srvr.ServletInitRunner$1.run(ServletInitRunner.java:50)
     at weblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManager.java:744)
     at weblogic.t3.srvr.ServletInitRunner.run(ServletInitRunner.java:46)
     at java.lang.Thread.run(Thread.java:479)
When i look into the directories weblogic created after deployment, there is a
cls2372.jar at 1 level above the web-inf folder and it has all the servlets in
the correct package structure i.e. com/abc/servlets/startup
Any idea on why this is happening or what i am doing wrong?

also posting to servlet newsgroup.
"Ram" <[email protected]> wrote in message
news:[email protected]...
>
I have deployed a war file under weblogic 7. The application has somestartup servlets,
which are failing to load during startup. It returns the following errormessages
for each servlet
####<Jan 8, 2003 2:00:25 PM CST> <Error> <HTTP> <abc-web1> <abcAppServer><Thread-8>
<kernel identity> <> <101249><[ServletContext(id=3959381,name=abcApps,context-path=/abcApps)]:
Servlet class com.abc.servlets.startup.StartupTSContentDaemonServlet forservlet
StartupTSContentDaemonServlet could not be loaded because the requestedclass
was not found in the classpathD:\bea\user_projects\abcdomain\abcAppServer\stage\abcApps\abcApps.war;D:\bea
\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381
\jarfiles\WEB-INF\lib\servlet2373.jar;D:\bea\user_projects\abcdomain\.\abcAp
pServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\jbcl2374.j
ar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApp
s_3959381\jarfiles\WEB-INF\lib\jaxp2375.jar;D:\bea\user_projects\abcdomain\.
\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\xerc
es2376.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApp
s_abcApps_3959381\jarfiles\WEB-INF\lib\AS4002377.jar;D:\bea\user_projects\ab
cdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF
\lib\decrypt2378.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdel
ete\abcApps_abcApps_3959381\jarfiles\cls2372.jar.
java.lang.UnsupportedClassVersionError:com/abc/servlets/startup/StartupTSContentDaemonServlet
(Unsupported major.minor version 48.0)>
####<Jan 8, 2003 2:00:25 PM CST> <Error> <HTTP> <abc-web1> <abcAppServer><Thread-8>
<kernel identity> <> <101216> <Servlet: "StartupTSContentDaemonServlet"failed
to preload on startup in webapp: "abcApps">
javax.servlet.ServletException:[ServletContext(id=3959381,name=abcApps,context-path=/abcApps)]:
Servlet class com.abc.servlets.startup.StartupTSContentDaemonServlet forservlet
StartupTSContentDaemonServlet could not be loaded because the requestedclass
was not found in the classpathD:\bea\user_projects\abcdomain\abcAppServer\stage\abcApps\abcApps.war;D:\bea
\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381
\jarfiles\WEB-INF\lib\servlet2373.jar;D:\bea\user_projects\abcdomain\.\abcAp
pServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\jbcl2374.j
ar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApp
s_3959381\jarfiles\WEB-INF\lib\jaxp2375.jar;D:\bea\user_projects\abcdomain\.
\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF\lib\xerc
es2376.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdelete\abcApp
s_abcApps_3959381\jarfiles\WEB-INF\lib\AS4002377.jar;D:\bea\user_projects\ab
cdomain\.\abcAppServer\.wlnotdelete\abcApps_abcApps_3959381\jarfiles\WEB-INF
\lib\decrypt2378.jar;D:\bea\user_projects\abcdomain\.\abcAppServer\.wlnotdel
ete\abcApps_abcApps_3959381\jarfiles\cls2372.jar.
java.lang.UnsupportedClassVersionError:com/abc/servlets/startup/StartupTSContentDaemonServlet
(Unsupported major.minor version 48.0)
atweblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.jav
a:785)
atweblogic.servlet.internal.WebAppServletContext.preloadServlet(WebAppServletC
ontext.java:2763)
atweblogic.servlet.internal.WebAppServletContext.preloadServlets(WebAppServlet
Context.java:2708)
atweblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServle
tContext.java:2681)
atweblogic.servlet.internal.HttpServer.preloadResources(HttpServer.java:552)
atweblogic.servlet.internal.WebService.preloadResources(WebService.java:476)
at weblogic.t3.srvr.ServletInitRunner$1.run(ServletInitRunner.java:50)
atweblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManage
r.java:744)
at weblogic.t3.srvr.ServletInitRunner.run(ServletInitRunner.java:46)
at java.lang.Thread.run(Thread.java:479)
When i look into the directories weblogic created after deployment, thereis a
cls2372.jar at 1 level above the web-inf folder and it has all theservlets in
the correct package structure i.e. com/abc/servlets/startup
Any idea on why this is happening or what i am doing wrong?

Thread pool in servlet container

Hello all,
I'm working on this webapp that has some bad response times and I've identified an area were we could shave off a considerable amount of time. The app is invoking a component that causes data to be catched for subsequently targeted apps in the environemnt. Our app does not need to wait for a response so I'd like to make this an asyncronous call. So, how best to implement this?...I considered JMS, but started working on a solution using the Java 1.4 backport of JSR 166 (java.util.concurrent).
I've been testing the use of a ThreadPoolExecutor, using an ArrayBlockingQueue. The work that each Runnable will perform involves a lot of waiting (the component we call invokes a web service, among a couple other distributed calls). So I figure the pool will be much larger than the queue. Our container has 35 execute threads, so I've been testing with a thread pool size of 25, and a queue of 10.
Any thoughts on this approach? I understand that some of this work could be simplified by JMS, but if I don't need to be tied to the container, I'd prefer not to. The code if much easier to unit test, and plays nicely with our continious build integration (which runs our junit test for us and notifies on errors).
Any thoughts are greatly appreciated...Thanks!!

Well, if it works, that's by far the best way to go - but note that creating threads in a servlet container means those threads are outside of the container's control. Many containers will refuse to give the new threads access to the JNDI context, even, and some may prevent you from creating threads at all.

Threads spawning in Servlets allowed?

Hello to all servlet afficionados,
          I am following thread discussions already a while and there's always
          discussion whether to user threads or not (I am not talking about a
          servlet thread but about threads manually instantiated for other
          reasons like asynchroneous handling of tasks for loose coupling or for
          long running purposes).
          So here's my question:
          Is it definitely allowed to spawn threads from a servlet (and even put
          the reference into the application context to allow others to later on
          access that thread)?
          Does the jdk specify on this?
          Or Is it even specific for each servlet engine? What is BEA saying
          about this?
          And even further: Is this different on application servers that
          include an ejb-container? Again, does the specification say something
          about this? What does BEA say about this?
          Thanks for trying to find out the real truth :-)
          regards
          Stefan


Stefan,
          There is nothing in the Servlet spec that specifically prohibits the use
          of threads within a servlet, but most will tell you that you should avoid it
          if possible. Having said that, I've seen quite a few implimentations that
          use background threads for tasks such as log queue processing and have not
          really had any issues. To me it's a matter of degree. As long as your
          architecture makes sense and you are careful to avoid potential deadlocks,
          you should be ok. FWIW, BEA recommends not creating threads within a web
          application.
          -chris
          "Stefan Hoehn" <[email protected]> wrote in message
          news:[email protected]...
          > Hello to all servlet afficionados,
          >
          > I am following thread discussions already a while and there's always
          > discussion whether to user threads or not (I am not talking about a
          > servlet thread but about threads manually instantiated for other
          > reasons like asynchroneous handling of tasks for loose coupling or for
          > long running purposes).
          >
          > So here's my question:
          >
          > Is it definitely allowed to spawn threads from a servlet (and even put
          > the reference into the application context to allow others to later on
          > access that thread)?
          >
          > Does the jdk specify on this?
          >
          > Or Is it even specific for each servlet engine? What is BEA saying
          > about this?
          >
          > And even further: Is this different on application servers that
          > include an ejb-container? Again, does the specification say something
          > about this? What does BEA say about this?
          >
          >
          > Thanks for trying to find out the real truth :-)
          >
          > regards
          > Stefan

Starting new threads from a servlet

Hi
I read somewhere that starting new threads from a servlet is not supported in the future releases of J2EE .
Any one aware of this.
I have a listener program started as a new thread from the init method of a servlet which is set to load on startup.
I have to think about another way to do this if this is not suppported in the future releases
any comments

Dr clap
Actually I was getting some warning messages in my websphere server console when I tried to make JDBC connections from the thread I opened in the servlet.
Everthing works fine but with the warning messages,
Then someone from IBM answered me in one of the forums quote
Cause: These messages are being produced due to an
"unsupported" environment. When application is
spinning its own threads from an EJB, spinning a
thread and accessing a database is not supported (per
the J2EE specification). One exception to this rule is
if a Servlet is spinning its own threads and accessing
a database. The J2EE specification is not clear on
this, so WebSphere Application Server 5.0 must allow
for it at this time. IBM is working with Sun to
clarify this in the specification, so eventually (i.e.
J2EE 1.4) spun threads from a Servlet accessing a
database outside of a transaction will not be
supported either.
Since we don't want to promote the usage of these
"naked" threads accessing databases, we are producing
the warning messages. Although they may be filling up
the logs, we feel that these are necessary to warn the
user that they are doing something not in-line with
the intended usage. Customer should consider changing
their application to comply with the
J2EE specification.
"""

I get two message threads for one contact. One for sms and one for iMessage since I updated to iOS 7. How can I get them both into one thread?

Ever since I upgraded to iOS7 just two of my contacts I get two message threads for them. One containing their iMessages to me and the other with just regular sms messages. In Contacs, their email and phone number are saved under one name. How can I get the iMessages and sms to come through under one thread in my messaging app again?

I am having this trouble also, my partner creates a new message to send to me, or sends a picture and it always comes through as an MMS and not using iMessage ...
will try deleting everything and starting again!

Error encountered while signing. Windows cryptographic service provider reported an error. Object not found. Error code:2148073489. Windows 7, Adobe Reader XI, Symantec PKI, Smart Card and CAC. I have seen other threads for this error but none have a reso

Error encountered while signing. Windows cryptographic service provider reported an error. Object not found. Error code:2148073489. Windows 7, Adobe Reader XI, Symantec PKI, Smart Card and CAC. I have seen other threads for this error but none have a resolution. Any help would be appreciated.
Sorry for the long title, first time poster here.

This thread is pretty old, are you still having this issue?

Suggestions thread for ABAP FAQ sticky

See these threads for "online collections" in the ABAP Development forums =>
FAQ's, intros and memorable discussions in the ABAP General Forum
FAQ's, intros and memorable discussions in the ABAP Data Dictionary Forum
FAQ's, intros and memorable discussions in the ABAP UI Programming Forum
FAQ's, intros and memorable discussions in the ABAP Form Printing Forum
FAQ's, intros and memorable discussions in the Enhancements & Modifications
FAQ's, intros and memorable discussions in the Performance and Tuning Forum
FAQ's, intros and memorable discussions in the Data Transfers Forum
FAQ's, intros and memorable discussions in the ABAP Objects Forum
Edited by: Julius Bussche on Apr 21, 2009 5:22 PM

ABAP General
Subtotals in alv list.   => Subtotals in ALV    <= Added and moved to UI programming
Can we modify a sub-total in ALV => Subtotals text in ALV /Modification of Subtotals in ALV   <= Moved down to new thread.
cl_salv_table - Save Layout => ALV OM Save layout option <= Moved down to new thread.
Report with page break.   => ALV Report with page break. <= Moved down to new thread.
ALV Sorting Not Working after Adding Checkbox to ALV => ALV Sorting and Group Functionality working with Checkbox <= Moved down to new thread.
Calculating Total with Checkbox in ALV Grid => Calculating Total with Checkbox in ALV Grid <= Moved down to new thread.
DUMP WHILE SUMMATION IN ALV => General Fieldcatalog error. <= Moved down to new thread.
Problems with REUSE_ALV_FIELDCATALOG_MERGE =>Problems with REUSE_ALV_FIELDCATALOG_MERGE   <= Moved down to new thread.
Must i_structure_name for LVC_FIELDCATALOG_MERGE be pre-defined in dict?   => Converting SLIS fieldcatalog to LVC fieldcatalog <= Moved down to new thread.
Capture Checkbox Value in ALV Grid   => Capturing the editable fields values in ALV   <= Moved down to new thread.
how to refresh table display using slis and 'reuse_alv_grid_display method. => Refreshing the ALV Display <= Moved down to new thread.
fetch data in edittable field in alv using REUSE_ALV_GRID_DISPLAY_LVC FM => Reading the editable values for ALV LVC function <= Moved down to new thread.
Radibutton in ALV Report output => Radio buttons in ALV report <= Moved down to new thread.
Edit rows in ALV => Usage of Styles in ALV for disable/enable input option <= Moved down to new thread.
how to copy/delete file => executing Unix commands <= Hmmm... c-calling the 'system' does not work in my systems during normal operations. See system param 'rdisp/call_system' which can be disabled, then the code dumps. Is there a different thread with DATASET commands? SXPG?
express CR_LF => ABAP char Utilities CR_LF use , replace '##' in a application server <= Ahhh yes, I remember this series. This is one of the nicer threads from it... Added.
String Operations which contain the special character '#' in BDC Session => ABAP char Utilities Horizontal_tab use , replace '#' in application server file <= Sufficiently covered by the next thread.
Problem with statement "find all occurences of ..." => ABAP char utilites Newline, replace '#' in application server in end of line <= Added.
How to Send Email to Outlook? =>sending mails to outlook <= Added.
FM for uploading Image to SAP => upload image to mime repository <= Added.
Passing an Internal Table to a Report executed through 'Submit' => use of Import and export refer Rich Heilman's code <= Added.
Create a parameter to enter a password => Selection parameter password behaviour <= Added.
ABAP Dictionary
=>
Form Printing
Exporting Graphics from SAP =>Download Logo from SE78 <= Okay, added... but the thread is rather old and ws_download is obsolete now, isn't it?
BDC for SE78 Transaction => Upload Logo programatically <= Hmmm... external performs and guests. I would like more opinions on this one before adding.
UI Programming
[Top of page in OO ALV|TOP_OF_PAGE in ALV Using CL_GUI_ALV_GRID ]=> Top of page in OO ALV <= I understand that this blog was very helpfull, but it is full of email addresses. Hmmm.. tough call Is there another example (thread) without any "here is my mail address" comments. We want to avoid those.
[Top of page Alignments in Normal ALV|Alignment of Data in TOP-OF-PAGE in ALV GRID] => Top of page in normal ALV <= this is more wiki material in a blog, but again often asked... Hmm.. lets go through the others first and come back to this one.
To display URL as a hyperlink (along with simple text) in dialog program   => URL display using HTML Viewer <= Added.
select-option on dynpro => Select-options usage in Module pool programming <= Added.
New! =>
Enhancements and Modifications
=>
ABAP Performance and Tuning
=>
Data Transfers
=>
ABAP Objects
=>
Edited by: Julius Bussche on Oct 3, 2008 10:31 PM
Edited by: Julius Bussche on Oct 3, 2008 10:34 PM
Edited by: Julius Bussche on Oct 3, 2008 10:38 PM
Edited by: Julius Bussche on Oct 3, 2008 10:43 PM
Edited by: Julius Bussche on Oct 3, 2008 10:55 PM
Edited by: Julius Bussche on Oct 4, 2008 12:06 AM
Edited by: Julius Bussche on Oct 4, 2008 12:40 AM
Edited by: Julius Bussche on Oct 4, 2008 12:57 AM
Edited by: Julius Bussche on Oct 4, 2008 1:23 AM
Edited by: Julius Bussche on Oct 4, 2008 3:27 PM
Edited by: Julius Bussche on Oct 4, 2008 3:39 PM
Edited by: Julius Bussche on Oct 4, 2008 5:40 PM
Edited by: Julius Bussche on Oct 4, 2008 5:59 PM
Edited by: Julius Bussche on Oct 4, 2008 7:17 PM

How to run a thread for second time ?

I have a written a ThreadPool, but I found that basically a thread is not running for the second time. i.e First i call run() method and call stop(). If i call again run() method for the same thread, it is not running. What should I do, If i want to run the thread for the second time ?
class NewThread implements Runnable {
String name;
NewThread(String a) {
name=a;
public void run() {
try{
for(int i=0;i<5;i++) {
System.out.println("Thread :" + name + " #" +i);
Thread.sleep(5);
catch (Exception e) {
e.printStackTrace();
class threadRunnableTest {
public static void main (String args[]) {
Runnable runnable=new NewThread("BaSkAr");
Thread thread = new Thread(runnable);
try{
System.out.println("First Thread is starting !!!");
thread.start();
Thread.sleep(2000);
System.out.println("First Thread it to be stopped!!");
thread.stop();
System.out.println("Second Thread is starting !!!");
thread.start();
Thread.sleep(2000);
System.out.println("Second Thread it to be stopped!!");
thread.stop();
catch (Exception e) {
e.printStackTrace();

baskark wrote:
I have a written a ThreadPool, but I found that basically a thread is not running for the second time. i.e First i call run() method and call stop(). If i call again run() method for the same thread, it is not running. What should I do, If i want to run the thread for the second time ?
class NewThread implements Runnable {
String name;
NewThread(String a) {
name=a;
public void run() {
try{
for(int i=0;i<5;i++) {
System.out.println("Thread :" + name + " #" +i);
Thread.sleep(5);
catch (Exception e) {
e.printStackTrace();
class threadRunnableTest {
public static void main (String args[]) {
Runnable runnable=new NewThread("BaSkAr");
Thread thread = new Thread(runnable);
try{
System.out.println("First Thread is starting !!!");
thread.start();
Thread.sleep(2000);
System.out.println("First Thread it to be stopped!!");
thread.stop();
System.out.println("Second Thread is starting !!!");
thread.start();
Thread.sleep(2000);
System.out.println("Second Thread it to be stopped!!");
thread.stop();
catch (Exception e) {
e.printStackTrace();
It's usually helpful to check the documentation:
[http://java.sun.com/javase/6/docs/api/java/lang/Thread.html#start()|http://java.sun.com/javase/6/docs/api/java/lang/Thread.html#start()]
start
public void start()Causes this thread to begin execution; the Java Virtual Machine calls the run method of this thread.
The result is that two threads are running concurrently: the current thread (which returns from the call to the start method) and the other thread (which executes its run method).
It is never legal to start a thread more than once. In particular, a thread may not be restarted once it has completed execution.
So, make a new java.lang.Thread

Use jar file for one servlet in one application (not global in classpath)

I have a servlet application that needs a jar file to load with one particular servlet. If I put the classpath to the jar file in the jvm12.conf, the servlet loads fine. I can't run it like that, however, since I use another jar file by the same name in a different application. I would like to specify it only with the servlet that needs it. According to the online help file, it says more than one jar, zip, or class file can be specified in the servlet classpath, but that doesn't seem to be the case. We're running iPlanet 4.1. I've tried adding the classpath to the jar file after the classpath for the servlet itself (servlet.properties), but it gives the class not found error for that function. Is there a way to do this? Context.properties, maybe? I can't find any instructions on setting that up.

You might have better luck asking this question on a web server forum. This is an application server forum and most people here are going to more experienced with iAS.
David

How is it possible to make sure that LV uses the same thread for several threadsafe DLL calls?

Hello,
i have a thread safe DLL and most functions are called from serveral threads from the LV apllication without problems.
In case of an error i have to call an error handler function in this DLL (like WinAPI: GetLastError()) from the same thread which has called the function that failed before.
I can't use the user interface execution because some functions need a long execution time and i don't want to balk the user interface.
All other executions than the user interface execution have more than one thread and in most cases the DLL function calls were executed from different threads - so the error handling doesn't work...
Any idea?
Thanks for your help!

Hmmm....
How about wrapping all of your dll calls in a single VI (or an Action Engine ) and make sure the VI's thread is NOT set for "Same as caller".
"Threadconfig.vi" (sp?) will also let you dictate the number of threads associated with an execution system. Set your target thread for "1".
Not sure on the above.
Please correct me if this is wrong!
Ben
Message Edited by Ben on 07-19-2007 08:26 AM
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

Where is the maven repository for Grizzly servlet webserver?

Folks,
I need to download Maven dependency grizzly-servlet-webserver. I have browsed a number of websites to see how people are defining the dependency in their pom.xml file. It is confusing to see people using different group-ids and different versions. My questions are:
1. Where is the final Maven repository for grizzly-servlet-webserver?
2. What is the group id for grizzly-servlet-webserver?
3. What is the latest version of grizzly-servlet-webserver?
Thank you in advance for your help.
Regards,
Peter

Is it really that difficult? I type in "grizzly webserver" in google and get the java.net page for it.
http://grizzly.java.net/
Now in ONE CLICK I got the Maven documentation. I repeat: ONE CLICK.
If you want to have certainty go to the source, not a programming forum!

No of threads for a servlet

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