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Constant dspace error java.lang.OutOfMemoryError: Java heap space

I have a DSpace server, after uprading from version 4.3 to 5.1, it constantly stops working after some hours with following error:
java.lang.OutOfMemoryError: Java heap space
I've read answers to the same questions, but they didn't help me.
My JAVA_OPTS: -Xmx4096M -Xms4096M -Dfile.encoding=UTF-8 -Dsun.jnu.encoding=UTF-8
Here are my logs:
dspace.log.2015-04-21: http://jpst.it/ylU4
tomcat7-stderr.2015-04-20.log: http://jpst.it/ylTN
localhost_access_log.2015-04-20.txt: http://jpst.it/ylTT
I searched the internet for a solution and could not find one, does any one have a clue?

Your tomcat log file quite clearly says that it isn't using the JAVA_OPTS you're passing in:
INFO: Command line argument: -Xmx256m
In my experience, DSpace 5 needs at least 512MB; your 4GB look a little excessive unless your DSpace instance is very big / gets lots of traffic.
You aren't telling us what operating system you're using, so it's hard to give advice on how where to set these properly. Start with your tomcat startup script and/or the tomcat configuration files. On my Red Hat Enterprise Linux 6.6 boxes (with tomcat6), the correct place for the memory settings is /etc/tomcat6/tomcat6.conf.

How to increase heap memory for WildFly?

WildFly 8 is started on a linux server with standalone.sh. I noticed that the server was started with very few heap memory space.
I need to increase the heap memory space for the server and for applications, which are running on the server. How can I do it?

Just edit bin/standalone.conf, look for the first occurrence of JAVA_OPTS and change the -Xmx option according to your needs.

Linux:
bin/standalone.conf
Check for the following line,
JAVA_OPTS
and change it accordingly to suit your heap size needs
-Xms1303m: initial heap size in megabytes
-Xmx1303m: maximum heap size in megabytes
JAVA_OPTS="-Xms1024M -Xmx2048M -XX:MaxPermSize=2048M -XX:MaxHeapSize=2048M"
Windows:
bin/standalone.conf.bat
JAVA_OPTS="-Xms1024M -Xmx2048M -XX:MaxPermSize=2048M -XX:MaxHeapSize=2048M"
Now restart the server and it will work without prompting any heap size errors.

On OS WINDOWS you need to setting standalone.conf.bat

if wildfly 8 is used along with JDK 8,
We need to add MaxMetaSpace Size.
For example,
JAVA_OPTS="$JAVA_OPTS -XX:MaxMetaspaceSize=256M"
As we all know Java 8 does not support Perm gen setting.
For related information, Please check
Wildfly Heap issue
I hope it helps.

I am running Eclipse and changing the 'bin/standalone.conf' didn’t work for me. In this case the solution was oppening the 'Servers' view in Eclipse, double-click the Wildfly server, go to 'Open launch configuation' and do that changes there in 'VM argumments'. Anyway I am a bit noob with Wildfly, I hope other users could contrast my info, I found that in http://www.nailedtothex.org/roller/kyle/entry/articles-wildfly-jvmparams
Its for a Linux server, but I think it could work for windows too.

For managed domain you can set it using heap tag (e.g.<heap size="64m" max-size="512m"/>) within jvm in domain.xml or host.xml (depending on the scope you want to address).

Answer from official documentation:
For a standalone server, you have to pass in the JVM settings either
as command line arguments when executing the
$JBOSS_HOME/bin/standalone.sh script, or by declaring them in
$JBOSS_HOME/bin/standalone.conf. (For Windows users, the script to
execute is %JBOSS_HOME%/bin/standalone.bat while the JVM settings can
be declared in %JBOSS_HOME%/bin/standalone.conf.bat)
** Restart server to make this change effective.

Increase Windows installer-based Tomcat PermGen Space

I'm having some problems with Tomcat. I'm deploying a Grails application and as I were adding new features I got this (sadly well known) error in the stacktrace file:
Caused by: java.lang.OutOfMemoryError: PermGen space
2014-01-13 19:28:35,753 [http-bio-8080-exec-26] ERROR StackTrace - Full Stack Trace:
org.codehaus.groovy.runtime.InvokerInvocationException: java.lang.OutOfMemoryError: PermGen space
at gsp_liquidaciones_liquidacionDeComplejolist_gsp$_run_closure2.doCall(gsp_liquidaciones_liquidacionDeComplejolist_gsp.groovy:84)
at gsp_liquidaciones_liquidacionDeComplejolist_gsp.run(gsp_liquidaciones_liquidacionDeComplejolist_gsp.groovy:105)
at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:195)
at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
...
I have an Windows installer-based tomcat installation and I don't have an catalina.bat file also. Googling many pages suggest to modify this file (catalina.bat) or register JAVA_OPTS variable, but nothing works. So, where do I have to specify this parameters?:
SET JAVA_OPTS="-Dfile.encoding=UTF-8 -server -Xms512m -Xmx1024m -XX:NewSize=256m -XX:MaxNewSize=256m -XX:PermSize=256m -XX:MaxPermSize=256m -XX:+DisableExplicitGC”
I have tried to modify the Java Options through Apache Tomcat 7 Properties window but after the modifications the server can't start.
My computer has 4Gb RAM installed.
Thanks in advance.

For the following system specifications:
Windows 7 64-bit
4 GB installed RAM
Intel Core i7 processor
Java(TM) SE Runtime Environment (build 1.6.0_25-b06)
The Tomcat 7 Java properties for an acceptable behavior MIGHT be:

You should have a small windows application 'tomcat6w.exe' or 'tomcat7w.exe' when tomcat was installed as a windows service. When you start this application it has a tab 'Java' where you can set the JVM parameters. For more details see more memory to Tomcat service.
You need to enter only the parameters which start with -X.

This work for me in apache-tomcat-8.0.15, but i think it would be the same for all to tomcat's version.
I had executed regedit and found this path:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tomcat8
And change ImagePath key to:
C:\apache-tomcat-8.0.15\bin\tomcat8.exe //RS//Tomcat8 ++JvmOptions -XX:PermSize=128m -XX:MaxPermSize=512m

PermGen space error while application is running

My Web application is running on tomcat apache-tomcat-6.0.35 and It was working fine witout any issue.But today I show bellow exception in catalina.out log and was unable to login to the system.
Jul 9, 2013 2:40:15 PM org.apache.coyote.http11.Http11Processor process
SEVERE: Error processing request
java.lang.OutOfMemoryError: PermGen space
I was under impression this exception can be ocuured when you deploy or redeploy a application. But I got this when the application is running without any issues. What could be the reason for this. Kindly advice

Each webapp in Tomcat has a separate class loader with a separate set of loaded classes. When we start Tomcat it does not load all classes of all its apps at once but rather it loads the apps lazily. When an app becomes active it starts loading its classes and it may happen that JVM runs out permgen space. That is, it may happen even without redeploying apps.

add these Optionsto JVM command line when Tomcat is started Or add to IDE VM Options
-XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled
OR
-XX:MaxPermGen=128M

It sounds like one of your webapps is consuming a lot of memory. Have you tried raising the PermGen size? In $CATALINA_HOME/bin/catalina.sh you can add
-XX:PermSize=512m -XX:MaxPermSize=512m
to your JAVA_OPTS so that it allocates enough space to run.

You are getting out of permGen space, try to change this parameters on your tomcat start script
/etc/init.d/tomcat6
JAVA_OPTS="-Djava.awt.headless=true -XX:MaxPermSize=512M"
Set the memory amount as you need.

It definitely is an error that often shows up during deployments. I've seen it occur any number of times in both Grails and Java applications. You can increase your permgen space by adjusting the JVM startup param -XX:MaxPermSize, ie:
-XX:MaxPermSize=256m
This thread covers the issue in detail: Thread

I had this error a few days ago. I fixed it by restarting the real machine - there was a problem with a deploy.
Also you can fix it by adding
JAVA_OPTS="-Djava.awt.headless=true -Dfile.encoding=UTF-8
-server -Xms1536m -Xmx1536m
-XX:NewSize=256m -XX:MaxNewSize=256m -XX:PermSize=256m
-XX:MaxPermSize=256m -XX:+DisableExplicitGC"
See possible fix

How do I increase allocated memory in jvm for Grails commands on IntelliJ IDEA 9 Beta?

I use Windows Vista , 4GB RAM , Core2
I have tested with this idea.exe.vmoptions :
-Xms64m
-Xmx512m
-XX:MaxPermSize=256m
-ea
-agentlib:yjpagent=disablej2ee,disablecounts,disablealloc,sessionname=IntelliJIdea90

The -Xmx256M option is hardcoded at the moment and there is no way to change it. There is a related discussion in the IDEA forum. If you need a way to specify heap size, please file a feature request.

Stupid I am : I have found on run configuration VM parameters and I have set "-XX:MaxPermSize=1024m -Xmx1024M -server"