"java.lang.OutOfMemoryError: Java heap space" when comparing files

Hi,
I need to take differences between the existing jazn-data.xml and the jazn-data.xml file downloaded from ADR and keep only the required changes. For this, I copied the contents of the new jazn file into the existing one and then tried to use the history tab to compare.
But I am encountering this error always
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
     at oracle.javatools.compare.algorithm.sequence.SequenceCompareAlgorithm.getDifferences(SequenceCompareAlgorithm.java:153)
     at oracle.javatools.compare.algorithm.sequence.SequenceCompareAlgorithm.compare(SequenceCompareAlgorithm.java:55)
     at oracle.javatools.compare.CompareModelFactory.createCompareModel(CompareModelFactory.java:116)
     at oracle.diffmergevhv.diffmerge.DiffMergeView.openImpl(DiffMergeView.java:949)
     at oracle.diffmergevhv.ToolView.open(ToolView.java:310)
     at oracle.diffmergevhv.ToolMain.openView(ToolMain.java:493)
     at oracle.diffmergevhv.ToolMain.executeGUI(ToolMain.java:146)
     at oracle.diffmergevhv.ToolMain.execute(ToolMain.java:91)
     at oracle.diffmergevhv.diffmerge.DiffMergeTask.execute(DiffMergeTask.java:23)
     at oracle.diffmergevhv.diffmerge.DiffMergeMain.main(DiffMergeMain.java:344)
i tried changing the user memory env setup also but didn't work. I am using 12gb memory slc machine
" setenv USER_MEM_ARGS "-XX:CompileThreshold=8000 -XX:PermSize=96m -XX:MaxPermSize=2048m -Xms128m -Xmx8192m "
I also tried the "ade diff -gui " command but the problem remains the same.
The file sizes are:
existing jazn: 2.2 MB
new jazn : 3.4 MB
Thanks,
Mehul

The way i do is..
setenv ADE_MERGE_METHOD tkmerge
use the ade diff -gui command
then unset the ADE_MERGE_METHOD to default by using the following.
unsetenv ADE_MERGE_METHOD
Thanks,
Venu

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pretty obvious to me "java.lang.OutOfMemoryError: Java heap space"
Read,
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/jsts/(Kernel)OOM
or
java.lang.OutOfMemoryError: Java heap space
those links should give you a fairly good idea on how to solve the issue.
Regards
Juan

Servlet - java.lang.OutOfMemoryError: Java heap space

Hi,
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regards,
Manmohan
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type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
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    String result;
    if(examInfo != null && caseInfoArray != null && imageIndexArray != null && imageArray != null ){
        result = "The transaction was successed!";
        try {
            oos.writeObject(examInfo);
            oos.writeObject(caseInfoArray);
            oos.writeObject(imageIndexArray);
            oos.writeObject(imageArray);
        } catch (IOException ex) {
            result = "The transaction was failed!";
    }else{
        result = "The transaction was failed!";
    return result;
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
    ObjectInputStream inputStreamFromApplet = null;
    Object object = null;
    try {
        inputStreamFromApplet = new ObjectInputStream(request.getInputStream());
        object = inputStreamFromApplet.readObject();
        ObjectOutputStream oos = new ObjectOutputStream(response.getOutputStream());
        String returnValue = this.processObject(object, oos);
        oos.writeObject(returnValue);
        oos.flush();
        oos.close();
    } catch (ClassNotFoundException classNotFoundException) {
        classNotFoundException.printStackTrace();
    } finally{
        inputStreamFromApplet.close();
} And the error messages I got here is:
SEVERE: Servlet.service() for servlet ExamViewerServlet threw exception
java.lang.OutOfMemoryError: Java heap space
        at javax.swing.ImageIcon.writeObject(ImageIcon.java:411)
        at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:592)
        at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:917)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1339)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
        at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
        at ExamViewerServlet.processObject(ExamViewerServlet.java:147)
        at ExamViewerServlet.processRequest(ExamViewerServlet.java:176)
        at ExamViewerServlet.doPost(ExamViewerServlet.java:217)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
        at java.lang.Thread.run(Thread.java:595)Please help.
Linqing
Edited by: discovery_java on Feb 1, 2010 2:12 PM

wire the code into a simple unit test, then run a profiler on it to see where the memory is going. You need the help of these kind of tools to track down memory issues, before that it is only guesswork what might be soaking it all up.

Tomcat Error: "java.lang.OutOfMemoryError: Java heap space"

Hi,
We are on BOXI 3.1 SP3. We are using Tomcat as a application server.
After certain time interval tomcat server hangs and users are unable to login to Infoview. When we checked in catalina.out file, we got error "java.lang.OutOfMemoryError: Java heap space". As a workaround, we restart tomcat server. That time we are unable to stop tomcat server using tomcatshutdown.sh script and we need to kill it forcefully. Once we restart the tomcat server, occupied memory free up and users are able to login to Infoview.
Below are my observations on this issue:
1. We have observed that this is not happening only during peak time/heavy load on system, but is happening during weekend as well which shows that it is not related to user load.
2. Issue occurs intermittently.
3. Tomcat is unable to release unused memory. It just adds the memory and reaches it's maximum allocated memory.
I raised SAP case for this and they suggested to add parallet garbage collector parameter. but that did not help.
Below is heap size setting for Java under /Install Dir/setup/env.sh:
JAVA_OPTS="$JAVA_OPTS -Xmx1024m -XX:MaxPermSize=256m -XX:+UseParallelGC"
Below are my environment details:
Product : BOXI R3.1 SP3
Linux: Redhat 5.3
RAM: 10 GB
Web Application Server : Apache - Tomcat
I am thinking that somehow tomcat is unable to free up it's occupied memory which is not used by any object further. It just keeps adding memory and reaches its maximum threshold limit which is 1024 MB.
We have installed SP3 on server last Sunday. Issue was there before SP3 installation as well and it was occuring very rarely. But after SP3 installation, it is occuring on daily basis. Is there any known bug in SP3.
Any help would be greatlt appericiated.
Thanks,
Swapnil Rodge.

Hi Sebastian,
Did you use the -Xmx2048m setting for Tomcat? If yes, how did it work for you? When I do the same tomcat refuses to start.
Thanks,
Vinayak

OracleAS: java.lang.OutOfMemoryError: Java heap space

Hi all,
Now I'm using Oracle AS 10.1.3.0, and after some hours, the error "java.lang.OutOfMemoryError: Java heap space" appeared.
And this is the information of OracleAS memory when it has error:
Memory MXBean
Heap Memory Usage: init = 268,435,456(262,144K) used = 112,462,248(109,826K) committed = 396,558,336(387,264K) max = 517,013,504(504,896K)
Non-Heap Memory Usage: init = 16,973,824(16,576K) used = 98,829,840(96,513K) committed = 99,319,808(96992K) max = 167,772,160(163,840K)
Memory Pool MXBeans
Code Cache
Type: Non-heap memory
Usage: init = 196608(192K) used = 27540032(26894K) committed = 27885568(27232K) max = 33554432(32768K)
Peak Usage: init = 196608(192K) used = 27556992(26911K) committed = 27885568(27232K) max = 33554432(32768K)
PS Eden Space
Type:Heap memory
Usage:init = 22478848(21952K) used = 26278816(25662K) committed = 50069504(48896K) max = 54722560(53440K)
Peak Usage: init = 22478848(21952K) used = 57802752(56448K) committed = 57802752(56448K) max = 58589184(57216K)
Collection Usage:init = 22478848(21952K) used = 0(0K) committed = 50069504(48896K) max = 54722560(53440K)
PS Survivor Space
Type: Heap memory
Usage: init = 3670016(3584K) used = 1082080(1056K) committed = 2424832(2368K) max = 2424832(2368K)
Peak Usage: init = 3670016(3584K) used = 19857256(19391K) committed = 19857408(19392K) max = 19857408(19392K)
Collection Usage: init = 3670016(3584K) used = 1082080(1056K) committed = 2424832(2368K) max = 2424832(2368K)
PS Old Gen
Type: Heap memory
Usage: init = 238616576(233024K) used = 85108712(83113K) committed = 344064000(336000K) max = 477233152(466048K)
Peak Usage: init = 238616576(233024K) used = 477233152(466048K) committed = 477233152(466048K) max = 477233152(466048K)
Collection Usage: init = 238616576(233024K) used = 85108712(83113K) committed = 344064000(336000K) max = 477233152(466048K)
PS Perm Gen
Type: Non-heap memory
Usage: init = 16777216(16384K) used = 71289808(69618K) committed = 71434240(69760K) max = 134217728(131072K)
Peak Usage: init = 16777216(16384K) used = 71289808(69618K) committed = 71696384(70016K) max = 134217728(131072K)
Collection Usage: init = 16777216(16384K) used = 71177496(69509K) committed = 71434240(69760K) max = 134217728(131072K)
And this is runtime prarameter:
-Xrs -server -XX:MaxPermSize=128m -Xms256m -Djava.security.policy=$ORACLE_HOME/j2ee/home/config/java2.policy -Djava.awt.headless=true -Dhttp.webdir.enable=false
Any one can help me?
Rgds.

Think about what happens in your program. If your program loads lots of data into memory of the AS (=heap) and you have lots of users, then you can get errors like this. The obvious solution is to start raising the heapsize, but you cannot do that anymore, since you're out of physical memory.
So with the information I have seen so far, in this case you either have to buy more memory, get less users or refactor your program.

WEBLOGIC - java.lang.OutOfMemoryError: Java heap space

hi,
i am using Weblogic 10.3 in production mode
We are getting error " java.lang.OutOfMemoryError: Java heap space " frequently , and
we are using the default args
JAVA Memory arguments: -Xms256m -Xmx512m -XX:MaxPermSize=512m
OS - > Windows Server 2003
please help
Regards
Jeethi George

Hi George,
The Setting you have provided is wrong ...that is the reason you are getting OutOfMemory in Heap.
Your Setting is (As you have mentioned in your very first post): JAVA Memory arguments: -Xms256m -Xmx512m -XX:MaxPermSize=512m
Just a Bit Explaination:
Formula:
(OS Level)Process Size = [ Java Heap (+) Native Space (+) (2-3% OS related Memory) ]
PermSize : It's a Netive Memory Area Outside of the Heap, Where ClassLoading kind of things happens. In an operating System like Windows Default Process Size is 2GB (2048MB) default (It doesnt matter How much RAM do u have 2GB or 4GB or more)...until we dont change it by setting OS level parameter to increase the process size..Usually in OS like Solaris/Linux we get 4GB process size as well.
Now Lets take the default Process Size=2GB (Windows), Now As you have set the -Xmx512M, we can assume that rest of the memory 1536 Mb is available for Native codes.
(ProcessSize - HeapSize) = [Native (+) (2-3% OS related Memory)]
2048 MB - 512 MB = 1536 MB
THUMB RULES:+
MaxPermSize = (MaxHeapSize/3) ----Very Special Cases
MaxPermSize = (MaxHeapSize/4) ----Recommended
In your Case -Xmx and -XX:MaxPermSize bith are same ....That is the reason you are getting the OutOfMemory Error in Heap.
We should increase/tune the MaxPermSize when we deploy a very large application (like a WebApplication which uses many JSPs, or PageFlows/Portal framework etc.) in our Server.
What should be the exact setting of these parameters depends on the Environment /Applications etc...
But Just try -Xmx1024m -Xms1024m -XX:MaxPermSize256m
Another recommendation for fine tuning always keep (Xmx MaxHeapSize & Xms InitialHeapSize same).
Thanks
Jay SenSharma
http://jaysensharma.wordpress.com (WebLogic Wonders Are Here)

Ant + java.lang.OutOfMemoryError: Java heap space

Hi,
in theCMD is their a way to increase the memory heap when running an ant task,
I am running a big Junit test on Hibernate and I'm getting a BUILD FAILED java.lang.OutOfMemoryError: Java heap space error in my cmd promt window.
Thanks for any help.

I think you can set the env var ANT_OPTS to -Xmx128M.That would work too. Also, <jvmarg> element can be used within <Java> task. :)

Netbeans profiler and "java.lang.OutOfMemoryError: Java heap space"

I have a swing application. When I run this program, I get java.lang.OutOfMemoryError: Java heap space periodically.
I am using the netbeans profiler to figure out how my heap size is increasing and whether or not I have any memory leaks. What I see is that I have lots of int[] getting generated. When I take the snapshot and look at the allocation stack traces, I cannot find the packages in my code at all. I see classes in java.awt.image.*, sun.awt.image.*, javax.swing.*, etc., but nothing referring to the classes I have developed. What could be wrong and how come I do not see anything referring to my code so that I can fix it?

Take a look here.
It seems that you may have a similar situation. If you read through, you'll see that the number of surviving generations gives an indication of where to look.

"java.lang.OutOfMemoryError: Java heap space" while trying to read Excel.

Hi Experts,
Here is my query. I'm trying to upload excel data into database table. This excel contains more than 20000 records. I'm storing this data in a vector after reading it & passing this vector as a parameter to another method(not mentioned in the below code) which writes into the database. The code works for records <4000, but fails to read beyond that & throws exception as below.
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Java heap space
     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:433)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:355)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
javax.servlet.ServletException: Java heap space
     org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:841)
     org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:774)
     org.apache.jsp.readexcelsap_jsp._jspService(readexcelsap_jsp.java:365)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
java.lang.OutOfMemoryError: Java heap space
Below is the code for reference. Kindly Help me in getting this heap space error rectified or suggest me alternate ways.
I tried increasing Heap space as googled but in vain.
<%!
private Vector readExcelSheet(String uploadedFilePath, int sheetNo) throws IOException
     Vector allRowInfo = null;
        try
            HSSFSheet sheet= getWorkSheet(uploadedFilePath,sheetNo);
            //System.out.println(uploadedFilePath);
            //System.out.println(sheetNo);
            //System.out.println("--Sheet--"+sheet);
            //System.out.println("--Sheet--"+sheet.getLastRowNum());
            if(sheet!=null)
            allRowInfo = new Vector();
            for(int i=0;i<=sheet.getLastRowNum();i++)
                HSSFRow row= sheet.getRow(i);
                Vector eachRowInfo = new Vector();
                for(short j=0;j<row.getLastCellNum();j++)
                    eachRowInfo.add(getCellContents(row.getCell(j)));
                    //System.out.println("--"+row.getCell(j));
                allRowInfo.add(eachRowInfo);
            else
                 allRowInfo = null;
            //return allRowInfo;
        catch (FileNotFoundException ex)
             System.out.println("-- Error in reading--getWorkSheet -- 1--"+ex);
             allRowInfo = null;
        catch (IOException ex)
             System.out.println("-- Error in reading--getWorkSheet-- 2 --"+ex);
             allRowInfo = null;
        catch (IndexOutOfBoundsException ex)
             System.out.println("-- Error in reading--getWorkSheet-- 2 --"+ex);
             allRowInfo = null;
        catch (NullPointerException ex)
             System.out.println("-- Error in reading--getWorkSheet --"+ex);
             allRowInfo = null;
        catch(Exception e)
            System.out.println(e.getMessage());
            e.printStackTrace();
             allRowInfo = null;
        return allRowInfo;
%>
<%!
private HSSFSheet getWorkSheet(String uploadedFilePath, int sheetNo) throws IOException
        HSSFSheet sheet = null;
        try
            FileInputStream inputStream=new FileInputStream(uploadedFilePath);
            POIFSFileSystem poisFile=new POIFSFileSystem(inputStream);
            HSSFWorkbook workBook= new HSSFWorkbook(poisFile);
            sheet = workBook.getSheetAt(sheetNo);
        catch (FileNotFoundException ex)
             System.out.println("-- Error in reading--getWorkSheet --"+ex);
             sheet = null;
        catch (IOException ex)
             System.out.println("-- Error in reading--getWorkSheet --"+ex);
             sheet = null;
        catch (IndexOutOfBoundsException ex)
             System.out.println("-- Error in reading--getWorkSheet --"+ex);
             sheet = null;
        catch (NullPointerException ex)
             System.out.println("-- Error in reading--getWorkSheet --"+ex);
             sheet = null;
        catch(Exception e)
            System.out.println(e.getMessage());
            e.printStackTrace();
            sheet = null;
         return sheet;
%>
<%!
public String getCellContents(HSSFCell cell)
        String cellValue="";
        String cellValue1="";
        if(cell!=null)
             int cellType= cell.getCellType();
            if(cellType==HSSFCell.CELL_TYPE_NUMERIC)
                cellValue=(float)cell.getNumericCellValue()+"";
            if(cellType==HSSFCell.CELL_TYPE_STRING)
                 cellValue1=cell.getStringCellValue();
                 StringBuffer sb = new StringBuffer();
                 for(int i = 0; i < cellValue1.length(); i++)
                        sb.append(cellValue1.charAt(i));
                     if(cellValue1.charAt(i)=='\'')
                          sb.append('\'');
                 cellValue = sb.toString();
       return cellValue;
%>
<html>
<body>
<%
     String file_Name="Myexcel.xls";
     String path = "D://Test Upload//"+file_Name;
     Vector list = readExcelSheet(path,0);
</html>
</body>Regards
Venky
Edited by: Venky_86 on Jun 17, 2009 6:05 AM

HOW did you increase the heap space? As that is the only solution you have in this case really.
It is a known fact that POI can use up a lot of memory for big spreadsheets. If at all possible, I would try to switch to plain text comma separated files / tab delimited files. If you cannot do that, I would try to put a size restriction on the sheets that your application will process to get rid of the heap space risk. A sheet can contain 20000 records, or four sheets can contain 5000 records; in both cases you process the exact same data, but at only 25% of the total memory usage.

One app service getting "java.lang.OutOfMemoryError: Java heap space"

We are running a commercial app on WebLogic 9.2. Two physical servers with 5 application processes running on each in a single cluster. on the server in question, we have 5.5 gigs of free ram at the moment and still getting the message below.
We have 10 app servers and one is getting this message. the full text of it is:
####<Apr 13, 2011 10:58:12 AM CDT> <Warning> <DeploymentService> <lxwbwapa> <workbpr2_node_1a> <[ACTIVE] ExecuteThread: '6' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1302710292663> <BEA-290064> <Deployment service servlet encountered an Exception while handling the deployment service message for request id "-1" from server "Admin_pr2_a". Exception is: "java.lang.OutOfMemoryError: Java heap space
".>
I dug back through the logs and found it started a couple of weeks ago. I have been able to log into this app server without issue.
Something else I have noticed is that the total heap size for all the app services have shrunk from the initial value of 1.5G - they have all dropped down into the 500 meg range. Is this normal? Why has this one not increased the size of the heap if it is running out of memory?
I could restart the service for this app server but I would not know the cause and since it is a production server where I am not recieving complaints, I am hesitant to go through the res tape to do a re-start.
Any information or past experience with this type issue is greatly appreciated.
Thanks,
W

Hello,
You might want to post this in the weblogic forum: WebLogic Server - General
as they might be able to explain how WebLogic uses or releases resources.
Regards,
Chris

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