java.lang.OutOfMemoryError: Java heap space in jasper report

Question

When i export content in doc format then i get java heap space error,

java.lang.OutOfMemoryError: Java heap space
    at java.util.Arrays.copyOf(Unknown Source)
    at java.io.ByteArrayOutputStream.write(Unknown Source)
    at sun.nio.cs.StreamEncoder.writeBytes(Unknown Source)
    at sun.nio.cs.StreamEncoder.implWrite(Unknown Source)
    at sun.nio.cs.StreamEncoder.write(Unknown Source)
    at sun.nio.cs.StreamEncoder.write(Unknown Source)
    at java.io.OutputStreamWriter.write(Unknown Source)
    at java.io.Writer.write(Unknown Source)

Can you try to make the format of your question more readable, and possibly be a little more clear about what your question is? — Tom Neyland
– Tom Neyland, Commented Oct 19, 2009 at 5:38
my question is:i get java heap space error(OutOfMemoryError) when i try to export a huge content in doc format in jasper reports — stanley
– stanley, Commented Oct 19, 2009 at 5:56

msp · Accepted Answer · 2009-10-19 08:48:41Z

6

Best add a

-XX:+HeapDumpOnOutOfMemoryError

to create heapdump whenever an OutOfMemoryError occurrs, and then analyse the heap dump with e.g. Eclipse Memory Analyzer which will show you the amount of objects and usually clearly identifies the objects causing the OutOfMemory Error.

answered Oct 19, 2009 at 8:48

msp

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Comments

BalusC · Accepted Answer · 2009-12-24 16:39:39Z

java.lang.OutOfMemoryError: Java heap space

Java is simply running out of memory. It cannot allocate more memory anymore. The remnant of the stacktrace is irrelevant, it just happen to happen exactly during the array copy action. It could have happened anywhere.

Apparently you're trying to generate a report based on an extremely large dataset (thousands or tenthousands of records maybe), or you've supplied JVM too little memory. You should then just ensure that JVM has enough memory to handle all that data. The default is 128MB or 256MB, depending on JVM and environment used. Start to double that amount using the -Xmx argument for the JVM.

E.g.

java -Xmx512M (other arguments here)

You may also want to profile your application to check how many memory it is actually using and then optimize the argument for that.

On the other hand, if you're processing really a lot of data, then consider doing it in parts, e.g. first the first thousand records and then the second thousand records, etcetera.

Tom Neyland · Accepted Answer · 2009-10-19 05:38:03Z

1

Try increasing the memory that the JVM Starts with, and can use as its MAX.

Add these arguments to the launching of your program

-Xms500M

Replace the 500 with however many megs you want the JVM to start with.

-Xmx500M

Replace the 500 with however many megs you want the maximum memory the JVM can use to be.

answered Oct 19, 2009 at 5:38

Tom Neyland

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3 Comments

stanley Over a year ago

i added the same thing in the control panel->java setting and restarted my machine, it dint work. i added a space before it, should there be a space in the beginning

extraneon Over a year ago

There should be no space between -Xmx and 500M. There should be spaces between the various options (before the - sign). So the command would look like java -Xms500M -Xmx500M ...

Jé Queue Over a year ago

-Xms rarely that useful unless you want to pre-virtually-allocate, stick to -Xmx alone allows for the OS to allocate as necessary.

user277083 · Accepted Answer · 2010-02-19 15:39:19Z

1

If you dataset is huge, then you need to page the report generation itself. I was doing some research large dataset for jasper reports and found this article quite informative.

answered Feb 19, 2010 at 15:39

user277083

Comments

Vladimir Ivanov · Accepted Answer · 2011-09-15 10:52:44Z

1

You should go with Virtualizers feature of jasper reports. See an article here.

answered Sep 15, 2011 at 10:52

Vladimir Ivanov

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Comments

sinuhepop · Accepted Answer · 2009-10-19 09:24:18Z

0

Is not needed a great amount of memory for usual reports. Is your document so big?

Maybe Jasper Reports goes in an infinite loop. Modify log4j level in order to get more clues about what's occurring. Try to delete some parts to know where it gets stuck.

I've used Jasper Reports and get some errors like this. Sometimes Jasper Reports behaviour is, well, strange.

Good luck.

answered Oct 19, 2009 at 9:24

sinuhepop

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Varun Bansal · Accepted Answer · 2020-04-09 11:38:41Z

0

You can change memory params in setenv.bat file. below is the path for the same.

jasperhome/apache-tomcat/bin/setenv.bat

here you can change JvmMs and JvmMx parameters as per your requirement. Once change the param you need to restart the jasper server. one way to do this is by restart jasper services by task manager.

answered Apr 9, 2020 at 11:38

Varun Bansal

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karel · Accepted Answer · 2021-05-22 06:51:06Z

0

If you have following error in Jasper iReport:

Error filling print... java.lang.OutOfMemoryError: Java heap space null java.lang.OutOfMemoryError: Java heap space Print was not filled. Try using an EmptyDataSource...

To solve the error do the following:

Increase Java memory space in your computer
1. Go to Control Panel.
2. Go to Programs.
3. Go to Java.
4. Go to Java General tab to Java tab.
5. Click View.
6. After that set as in the below screenshot.
Go to the iReport and make the following changes.

edited May 22, 2021 at 6:51

karel

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answered May 21, 2021 at 10:25

Arjuna Perera

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