Description of problem:
I'm getting ISE (and java/lang/OutOfMemoryError in the catalina.out) when I try to access Systems -> Systems -> Duplicate Systems -> Duplicate Hostname


Version-Release number of selected component (if applicable):
spacewalk-java-2.3.8-120.el6sat.noarch
satellite-schema-5.7.0.20-1.el6sat.noarch
# alternatives --display java | grep 'link currently points to'
 link currently points to /usr/lib/jvm/jre-1.6.0-ibm.x86_64/bin/java


How reproducible:
always on mine machine


Steps to Reproduce:
(I do not see this on the clean system, so there must be some special setup
on the Satellite in question)
1. Go to: Systems -> Systems -> Duplicate Systems -> Duplicate Hostname


Actual results:
==> /var/log/tomcat6/catalina.out <==
JVMDUMP039I Processing dump event "systhrow", detail "java/lang/OutOfMemoryError" at 2015/12/11 05:26:24 - please wait.
JVMDUMP030W Cannot write dump to file /usr/share/tomcat6/heapdump.20151211.052624.9264.0001.phd: Permission denied
JVMDUMP032I JVM requested Heap dump using '/tmp/heapdump.20151211.052624.9264.0001.phd' in response to an event
JVMDUMP010I Heap dump written to /tmp/heapdump.20151211.052624.9264.0001.phd
JVMDUMP030W Cannot write dump to file /usr/share/tomcat6/javacore.20151211.052624.9264.0002.txt: Permission denied
JVMDUMP032I JVM requested Java dump using '/tmp/javacore.20151211.052624.9264.0002.txt' in response to an event
JVMDUMP010I Java dump written to /tmp/javacore.20151211.052624.9264.0002.txt
JVMDUMP032I JVM requested Snap dump using '/usr/share/tomcat6/Snap.20151211.052624.9264.0003.trc' in response to an event
JVMDUMP030W Cannot write dump to file /usr/share/tomcat6/Snap.20151211.052624.9264.0003.trc: Permission denied
JVMDUMP010I Snap dump written to /tmp/Snap.20151211.052624.9264.0003.trc
JVMDUMP013I Processed dump event "systhrow", detail "java/lang/OutOfMemoryError".
2015-12-11 05:26:26,036 [TP-Processor8] ERROR com.redhat.rhn.frontend.servlets.SessionFilter - Error during transaction. Rolling back
javax.servlet.ServletException: Filter execution threw an exception
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:259)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.redhat.rhn.frontend.servlets.LocalizedEnvironmentFilter.doFilter(LocalizedEnvironmentFilter.java:67)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.redhat.rhn.frontend.servlets.EnvironmentFilter.doFilter(EnvironmentFilter.java:100)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.redhat.rhn.frontend.servlets.SessionFilter.doFilter(SessionFilter.java:57)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.redhat.rhn.frontend.servlets.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:97)
	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:127)
	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:298)
	at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)
	at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
	at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:769)
	at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:698)
	at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:891)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)
	at java.lang.Thread.run(Thread.java:767)
Caused by: 
java.lang.OutOfMemoryError
: 
Java heap space
	at 
java.util.Arrays
.
copyOfRange
(
Arrays.java
:
4
2
0
1
)
	at 
java.util.Arrays
.
copyOf
(
Arrays.java
:
3
9
2
0
)
	at 
java.io.CharArrayWriter
.
toCharArray
(
CharArrayWriter.java
:
2
3
9
)
	at 
com.opensymphony.module.sitemesh.filter.Buffer
.
getContents
(
Buffer.java
:
4
0
)
	at 
com.opensymphony.module.sitemesh.filter.PageResponseWrapper
.
getContents
(
PageResponseWrapper.java
:
1
9
2
)
	at 
com.opensymphony.sitemesh.webapp.ContentBufferingResponse
.
getContent
(
ContentBufferingResponse.java
:
5
2
)
	at 
com.opensymphony.sitemesh.webapp.SiteMeshFilter
.
obtainContent
(
SiteMeshFilter.java
:
1
3
7
)
	at 
com.opensymphony.sitemesh.webapp.SiteMeshFilter
.
doFilter
(
SiteMeshFilter.java
:
7
7
)
	at 
org.apache.catalina.core.ApplicationFilterChain
.
internalDoFilter
(
ApplicationFilterChain.java
:
2
3
5
)
	... 
2
6
 more
 

Expected results:
Should work


Additional info:
System was cleany rebooted and reproducet after the reboot as well.