Memory Error with Tomcat 4.1

I have a Tomcat 4.1 installation on a Linux 7.2 box. Tomcat uses
mod_jk with Apache. We are currently in a development phase and change alot of jsp's on a daily basis. Eventually it seems that Tomcat runs out of memory for the compilations and gives the following message:
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: -1 in the jsp file: null
Generated servlet error:
[javac] Compiling 1 source file
The system is out of resources.
Consult the following stack trace for details.
java.lang.OutOfMemoryError
After Tomcat is restarted everything appears to to be okay for a time. Eventually this problem will come back. The problem appears to be only when jsp files are changed. Running jsp's ( which were previously compiled and have been unchanged) run just fine.
In the /var/tomcat4/conf/tomcat4.conf file I have the following command
uncommented:
JAVACMD="$JAVA_HOME/bin/java -Xms6m -Xmx100m"
I am running java 1.4.1 on the Linux box.

I was looking at the Jakarta web site and under the Tomcat4.1 documentation it gives a description of what is new in 4.1. It states:
Rewritten Jasper JSP page compiler
Performance and memory efficiency improvements
Among other things. Could they have a memory leak?

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When I use the image processor in PSCS4 to process a large number of raw files using ACR 5.1 (Nikon D3 NEFs), I consistently receive an error message after about 10-11 files have been processed that the instruction at 0x696336ab tried to read memory at 0x6C (or thereabouts) and the memory could not be read. I am saving as JPEGs with the color space set to sRGB.
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Hmm.. I was getting a similar error with CS3 and was very happy to find that it appeared to be cured in CS4. The CS3 issue would appear if I tried to process more then 100 NEFs. My workaround was to do them in smaller batches (60-75). Perhaps you might try reducing the memory alotted to PS or run it without any other apps running?
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Out of memory Error with jdk 1.6

Hello,
I have a swing application launched on the client with the help of Java web start. The applications works fine in jre 1.4 and jre 1.5. The heap sizes are :
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There is not enough memory error with 8gb installed

Description:
I'm getting an error when trying to copy or cut a collection of basic shapes in CS6 on Mac OS X 10.8.
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To increase available memory, close other open documents or applications.
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I reinstalled Flash
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Thanks for chiming in Mataxia.
One thing you can try is selecting the layers that have the shapes you want to copy. Then right click and choose copy layers. In my case this works even though selecting just the shapes (instead of the layers) will cause the memory error.
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This confirms my suspicions that this is a bug in flash. Would be great if someone from Adobe were reading this...

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Adjusting virtual memory has absolutely no effect.. It seems,
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mmm... just tried using a "workaround" if you still can call
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HTTP2302 error with tomcat and linux environment

We are using Sun Java(TM) System Web Server 7.0 with Tomcat 6.0.14 in Linux environment. We are frequently facing "Service Unavailable error" in the frontend . while verifying the logs we found the details as below :
could you guinde what could be issue here ?
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PathCheck fn="check-acl" acl="es-internal"
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<Object name="cgi">
ObjectType fn="force-type" type="magnus-internal/cgi"
Service fn="send-cgi"
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<Object name="send-precompressed">
PathCheck fn="find-compressed"
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Hi, The reason tomcat had to be used is that the software is bundled with tomcat. Hence we are in the following configuration:
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With this configuration. seems when we refresh a page quickly, we get "service unavailable error". But if we only put web contents, the issue does not exist. Looks like the issue resides in the plugin....
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Java heap out of memory error with -Xms1g -Xmx4g 64 bit VM

We are getting Java Heap memory error for the application we are running on linux 64 bit machine (VM).
The OOM came when heap usage was 1.7gb though we have specified min as 1gb and max as 4gb. If I understand correctly then it should not have been thrown as we have specified max as 4gb. If address space was the problem then it should have thrown swap space error.
Also, there were no other processes running on this node.
Below are the specifics of linux node we are using:
linux kernel: 2.6.18-128.el5
Linux Version: Red Hat Enterprise Linux Server release 5.3 (Tikanga) 64 Bit
Ulimts
[ppoker@aquariusvir11 ~]$ ulimit -a
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 139264
max locked memory (kbytes, -l) unlimited
max memory size (kbytes, -m) unlimited
open files (-n) 100000
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 10240
cpu time (seconds, -t) unlimited
max user processes (-u) 139264
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
Java Version
[ppoker@aquariusvir11 ~]$ java -version
java version "1.6.0_21"
Java(TM) SE Runtime Environment (build 1.6.0_21-b06)
Java HotSpot(TM) 64-Bit Server VM (build 17.0-b16, mixed mode)
Kernel Semaophores
[ppoker@aquariusvir11 ~]$ ipcs -l
------ Shared Memory Limits --------
max number of segments = 4096
max seg size (kbytes) = 67108864
max total shared memory (kbytes) = 17179869184
min seg size (bytes) = 1
------ Semaphore Limits --------
max number of arrays = 128
max semaphores per array = 250
max semaphores system wide = 32000
max ops per semop call = 32
semaphore max value = 32767
------ Messages: Limits --------
max queues system wide = 16
max size of message (bytes) = 65536
default max size of queue (bytes) = 65536
Please suggest what could be the reason for this error.
Thanks,
Ashish

javaguy4u wrote:
the OOM error ... wasn't coming when we had set min and max both as 4 GB.You deviously withheld that information.
When the JVM needs to grow the heap it asks the OS for a bigger memory block than the one it has.
The OS may refuse this and the JVM will throw an OOME.

Memory Leakage with Tomcat

Hi,
I have created an application that uses a single JSP and makes multiple calls to a database. It does populate a couple of arrays with values and then uses those values to get other values from the database.
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My connections are all closed and released, both database and result sets. I am preforming garbage collection.
I am using sessions, when users log in (dont know whether this has anything to do with it??)
Anyway, any help is greatly appreciated.
Cheers

Thanks for the help guys,
I run a query for the first time I load the site that loads everything into the session. I then chcek that the user is logged in? If the user is logged in, then it loads a instance of that single session.
If not, then it just loads the not logged in session page.
Thanks for that bit of connection architecture ronaldharing.
My connection class is similar, though I will make some modifications to this with your changes in place, and see how it goes.
This is my conncection class im using:
package Vidz;
import java.io.*;
import java.util.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class DBConnection {
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     public int vendorStatus;
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     public Statement stmt;
     public CallableStatement callStmt;
     public PreparedStatement preparedStmt;
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     public SQLWarning thisWarning;
     public boolean thisConnClosed;
* Establishes a connection to the database.
public DBConnection() {
try {
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conn.setAutoCommit(true);
status = "open";
} catch (Exception e) {status="DBConnection construction error:"+e.toString();
* Return java.sql.ResultSet
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try {
status=command;
stmt = conn.createStatement ();
status+="*";
rset = stmt.executeQuery(command);
status+="executeQuery OK: "+command;
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public synchronized int executeUpdate(String command) {
try {
stmt = conn.createStatement ();
status="executeUpdate OK: "+command;
return stmt.executeUpdate(command);
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if( conn != null )
if( ! conn.isClosed() )
conn.close();
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protected void finalize() throws IOException
try
if( conn != null )
if( ! conn.isClosed() )
conn.close();
catch (java.sql.SQLException e) {}
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Any more suggestions would be much appreciated

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Downloaded and ran jre-6u20-windows-i586-s.exe on a Win host (Dell PowerEdge R610 with 16 Core 2.27 GHz Intel Xeon) running Windows 7 64-bit. The website said if you're running a 64-bit Windows OS then download that file.
When I run the command "java -version" it says,
"C:\Users\plozanci>java -version
java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02)
Java HotSpot(TM) Client VM (build 16.3-b01, mixed mode, sharing)"
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If its false, where is the 64-bit version for Windows 7?

No. They are separate installers. The 32bit will run on a 64bit OS, but it is not 64bit. If you need the 64bit, you will need to download the 64bit installer.
You will need: jre-6u20-windows-x64.exe
Go: http://java.sun.com/javase/downloads/index.jsp
select: Download JRE
select: Windows x64
Happy downloading!
-Roger

Resource not available error with tomcat 5.5.26

hi
to all forum members,i am a new member of this forum.
i have a problem with running my servlet on apache tomcat/5.5.26 in window xp enviorenment.
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xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
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<description>
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<servlet-name>org.apache.jsp.index_jsp</servlet-name>
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<servlet>
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<servlet-class>mukesh_test.WEB-INF.classes.mks</servlet-class>
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<param-value>0</param-value>
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<servlet-mapping>
<servlet-name>mks</servlet-name>
<url-pattern>/mukesh_test/mks</url-pattern>
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plz help me out guys...

<servlet>
<servlet-name>mks</servlet-name>
<servlet-class>mukesh_test.WEB-INF.classes.mks</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>mks</servlet-name>
<url-pattern>/mukesh_test/mks</url-pattern>
</servlet-mapping>1) To avoid confusion, I would not use mks for the <servlet-name>. It's a fake name internal to your web.xml file anyway, so be creative and use something like: Flying Tigers.
2)
<servlet>
<servlet-name>Flying Tigers</servlet-name>
<servlet-class>mukesh_test.WEB-INF.classes.mks</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Flying Tigers</servlet-name>
<url-pattern>/mukesh_test/mks</url-pattern>
</servlet-mapping>The stuff between the <servlet-class> tags is wrong. You need to put the "fully qualified class name of your class" between the <servlet-class> tags. For instance, if your file mks.java (why are you using lower case names for classes?) does not have a package statement at the top of the file, then the fully qualified name of your class is: mks. On the other hand, if mks.java has a package statement at the top of the file like this:
package com.example;
then the fully qualified name of your class would be: com.example.mks. In addition, if you had that package statement at the top of mks.java, your .class file would need to be placed in the directory: .../mukesh_test/WEB-INF/classes/com/example/.
3)
<servlet>
<servlet-name>Flying Tigers</servlet-name>
<servlet-class>mks</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Flying Tigers</servlet-name>
<url-pattern>/mukesh_test/mks</url-pattern>
</servlet-mapping>The url-pattern is also fake. The whole idea is to hide your actual directory structure from hackers, so specifying your real directory structure there means that the url will also appear on your web page. And if the url appears on your web page, anyone can see it by clicking on View/Source in their browser. Use a fake directory and a fake file name instead:
<servlet>
<servlet-name>Flying Tigers</servlet-name>
<servlet-class>mks</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Flying Tigers</servlet-name>
<url-pattern>/Animals.do</url-pattern>
</servlet-mapping>That means your html page would call the servlet using the url: Animals.do. The extension .do is a common extension given to fake file names.
4) There's a forum here specifically for servlets called: Java Servlets.

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hello, I'm running Tomcat on Debian Sarge and I'm getting the following error:
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     org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
     java.lang.Thread.run(Thread.java:595)
The name of my servlet is BlueWolf. I have defined my servlet in my web.xml like so:

<servlet>
<servlet-name>BlueWolf</servlet-name>
<servlet-class>com.bluewolf.BlueWolf</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>BlueWolf</servlet-name>
<url-pattern>/BlueWolf</url-pattern>
</servlet-mapping>
I've tried searching for this error but there were no fixes I found that helped my situation. Can anyone please help me out? If any more information is needed please let me know.
Thanks!

Okay, I made a simpler web application. I have:
index.html
WEB-INF/
my WEF-INF directory looks like:
classes/
lib/
web.xml
my only servlet is WEB-INF/classes/com/servTest.class
I defined the servlet in my web.xml like this:

<servlet>
<servlet-name>servTest</servlet-name>
<servlet-class>com.servTest</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>servTest</servlet-name>
<url-pattern>/servTest</url-pattern>
</servlet-mapping>
However, I still get the same error (NoClassDefFoundError .... wrong name: servTest blah blah)
I am trying to access the servlet by the url http://localhost:8080/servTest/servTest and I've also tried http://localhost:8080/servTest/com.servTest. I also tried linking to it in my index via a form with action="servTest". I've also tried action="com.servTest" however I still can't seem to get past this wrong name error. However, I can create servlets fine without trying to use packages (i.e. if i place .class files directly in WEB-INF/classes), but I would really like to have packages working. Can anyone see any potential errors? thanks!

Memory Leak with Tomcat version update 3.2 to 6.0

Hi, I've been trying to update tomcat from 3.2 to 6.0. My issue is that I have a memory leak(s?) that make the web application unusable. Currently in my setup I am using these components:
Tomcat 6.0, sun JDK 1.6.0_01, mssql 2005, Microsoft SQL Server 2005 JDBC Driver 1.2, xalan 2.7.0, log4j 1.0.4 (should be only out of date component)
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My question for the community is, where should I be looking for my memory leak. Are there known issues with my setup?
thanks for your help,
Matt

Just in case someone goes down the same road as me, my problem was actually the one listed on the page below. My threads are not being released after a StandardContext reload. Which I'm not sure if this leak applies to tomcat version <4 or not.
http://opensource.atlassian.com/confluence/spring/pages/viewpage.action?pageId=2669

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When I attempt to launch jcmon.bat and access local administration, I get the following error:
ERROR => Can't attach to administration shared memory (rc=3) [jcmonxx.c 219]
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Thanks in advance!

Hi all,
jcmon.exe pf=I:usrsapVIKSYSprofileVIK_DVEBMGS00_VIKLAB
You will find the below, see the server0 is stopped. Thats what is not starting in our case, and that is the j2ee engine I suppose. Because the dispatcher and the SDM starts as can be seen. If you attempt to restart the process from the jcom administration menu, it wont because if it did then we would not have this problem in the first place. The sapinst tool is calling this.
============================================================
JControl Monitor Program - Main Menue
============================================================
0 : exit
10 : Cluster Administration Menue
20 : Local Administration Menue
command =>
SAP System Name : VIK
SAP System : 00
MS Host : VIKLAB
MS Port : 3601
Process Count : 3
PID of JControl : 1116
State of JControl : Some processes running
State inside MS : Some processes running
Run Mode : Normal Mode
Admin URL :
Idx
Name
PID
State
Error
Restart
0
dispatcher
3948
Running
0
yes
1
server0
0
Stopped
4
no
2
SDM
4564
Running
0
yes
I think the problem here seems to be the wrong JDK version.
Take this very seriously. I think this might save days of trouble,
SAP faces installation problem if you have an SDK/JDK lesser than 1.4.2_11. I did not take this very seriously and have 1.4.2_10 but then this thread below clearly says that there are problem with installations when you use 1.4.2_10. Useful for guys stuck in the same hole. This might be the reason why the java server process does not start while the java dispatcher and SDM starts.
The link for this JDk recommendation thread is
8) SAP J2EE-DEP 6.40 certification - JDK requirements
"SAP J2EE-DEP 6.40 certification - JDK requirements "
==>
So please adhere to the following:
Linux 32 Bit + 64 Bit (Itanium)
Windows 32 Bit + 64 Bit (Itanium)
Access to appropriate Sun J2SE Version:
Please use Sun J2SE 1.4.2_09 SDK (or higher 1.4.2 versions after they will become available).
It is not recommended to use versions lower than 1.4.2_09.
Please also do not use J2SE 5.0.
In contrast to the recommendation above please do not use J2SE 1.4.2_10 as it has problems during installation. The problem is under investigation.
The J2SE 1.4.2 SDK is available from
http://java.sun.com .
regards, Vikram

Memory Error with iTunes 7 startup??

I just reinstalled EVERYTHING on my G4. Rebuilt the whole machine from the ground up on a new HD. Needed to be done anyway so I dont mind. My problem? When I try to launch iTunes 7 I get the Pref setup page and then an error. "I tunes does not have enough memory to launch" Check my mem I have ell over 80% available out of 1.2 Gig. Just after a fresh restart it will not open as the very first thing tried. I tried trashing all Pref files, I have everything updated to its latest. What could cause this? As it sounds there are so many problems with version 7 that maybe its not worth it to try and get it working. Maybe a revert back to vers 6 is better?
Thanks
Dusty

Me too.
Upgrading on my MacBook Pro went fine, but on my G5 running OS 10.3.9 I cannot launch iTunes 7.0.
First I am presented with a blank license agreement page.
I click Agree then I'm told The iTunes application could not be opened. There is not enough memory available.
I have over 1GB of free RAM. My boot drive has 33GB available.
MacBook Pro, Dual Core 2.16 Mac OS X (10.4.7) Keyboard protected with leather

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