Java Heap Space Error in tomcat

Question

I am using Tomcat 7.0.28. I have deployed a war file. In this war file there is a server like structure where we can upload the files.

Now when i access that web page it is working, but when i try to upload the large files it is showing error of JAVA Heap Space.

How can i solve it?

One of the numerous answers about how to set the java heap space in tomcat : serverfault.com/questions/139435/… — Denys Séguret
– Denys Séguret, Commented Jul 12, 2012 at 7:01

Miquel · Accepted Answer · 2012-07-12 07:00:20Z

6

You are probably trying to put the whole file in memory. Your first shot should be to change the -Xmx parameter at the Tomcat JVM startup options to give it more memor. Aside from that, you'll have to read the file one chunk at a time, and write it on the hard drive, so as to free the memory.

answered Jul 12, 2012 at 7:00

Miquel

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3 Comments

Miquel Over a year ago

@Vijay here's a link to setting the Xmx paramter. As to reading the file in chunks, how do you currently read the file?

Vijay Over a year ago

actually i have setup BIM SERVER and they provided the WAR file for deployment. So don't know how they are reading files. but i did change the heap size using -Xmx attribute but still it is not working.

Christopher Schultz Over a year ago

Increasing the heap size will not be useful -- go talk to the "BIM SERVER" folks and ask about their file-upload requirements. You could also configure your server to do a heap dump on OOME so you can look at what it taking up all the space: probably a huge byte array with the file's contents. If so, "BIM SERVER" is poorly-written.

amicngh · Accepted Answer · 2012-07-12 07:31:43Z

4

You can increase HeapSize in tomcat using below command .

Linux : Open Catalina.sh file placed in the "bin" directory. You have to apply the changes to this line

CATALINA_OPTS="$CATALINA_OPTS -server -Xms256m -Xmx1024m "

Windows:

Open the "Catalina.bat" file placed in the "bin" directory

set CATALINA_OPTS=-server -Xms256m -Xmx1024m

Restart the tomcat after above change.

answered Jul 12, 2012 at 7:31

amicngh

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