java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space

Question

I created a sample JSF/JDBC project in Eclipse Indigo which is deployed to Tomcat 7. When I put mysql-connector-java-5.1.21.jar in /WEB-INF/lib, then I get the following errors:

One from Eclipse:

Server Tomcat v7.0 Server at localhost (8) was unable to start within 120 seconds. If the server requires more time, try increasing the timeout in the server editor.

And another one from Tomcat:

SEVERE: Error waiting for multi-thread deployment of context descriptors to complete
java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
at java.util.concurrent.FutureTask.get(FutureTask.java:83)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:574)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:470)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1413)

How are they caused and how can I solve it?

possible hundred duplicates stackoverflow.com/…

jolivier
– jolivier

2012-08-28 09:08:42 +00:00
Commented Aug 28, 2012 at 9:08 — jolivier
– jolivier, Commented Aug 28, 2012 at 9:08

Mikko Maunu · Accepted Answer · 2012-08-28 09:07:36Z

3

As the error says, you are out of heap space. Try to provide more heap by giving following JVM argument when starting tomcat:

java -Xmx1024m

Actual "right" amount depends about your hardware setup and requirements of application.

answered Aug 28, 2012 at 9:07

Mikko Maunu

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Comments

nitind · Accepted Answer · 2012-08-28 13:11:25Z

1

Tomcat is the process running out of memory, not Eclipse. Open the Tomcat instance from your Servers view and edit its Launch Configuration. From the Arguments tab, give it a larger maximum heap size.

answered Aug 28, 2012 at 13:11

nitind

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2 Comments

Vimal Over a year ago

img23.imageshack.us/img23/1525/errordh.jpg Where should i increase the heap size? Plz help meeeeeee...

nitind Over a year ago

Right there in the VM arguments field.

Mohammod Hossain · Accepted Answer · 2012-08-28 09:31:58Z

0

stop Tomcat v7.0 server and again run it. You can try to change java heap size

Edit eclipse-home/eclipse.ini to be something like the following and restart Eclipse. -vmargs -Xms256m -Xmx1024m

edited Aug 28, 2012 at 9:31

answered Aug 28, 2012 at 9:09

Mohammod Hossain

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3 Comments

Vimal Over a year ago

I found the eclipse configuration file.How to edit values? How much will i put?Plz explain me???

Mohammod Hossain Over a year ago

you can put minimum 256m and maximum 1024m

Vimal Over a year ago

-startup plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar --launcher.library plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.100.v20110502 -product org.eclipse.epp.package.jee.product --launcher.defaultAction openFile --launcher.XXMaxPermSize 256M -showsplash org.eclipse.platform --launcher.XXMaxPermSize 256m --launcher.defaultAction openFile -vmargs -Dosgi.requiredJavaVersion=1.5 -Xms1024m -Xmx1024m Is it correct ?

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