Memory leak with JSF

Hello,

we use JSF 1.2 / Richfaces 3.3.1 GA / Spring 3.0.5.

After migrating from JBoss 5.1.0 to JBoss 7.0.2 and after to JBoss 7.1 we are experiencing huge memory problems - while working with JSF / Richfaces.

Number of org.jobss.invocation.Interceptor, ChainedInterceptor are constantly growing and not collected by GC.

Class IMemory, kb % of memory Instances % of instances Source
java.util.Arrays$ArrayList 170 423 19 7 271 391 25
java.lang.Object[] 162 592 18 565 385 1
org.jboss.invocation.Interceptor[] 114 581 13 7 269 673 25 jar:file:/home/jbosser/jboss-as-7.1.0.CR1b/modules/org/jboss/invocation/main/jboss-invocation-1.1.1.Final.jar!/
org.jboss.invocation.ChainedInterceptor 112 926 12 7 227 327 25 jar:file:/home/jbosser/jboss-as-7.1.0.CR1b/modules/org/jboss/invocation/main/jboss-invocation-1.1.1.Final.jar!/

Most of Object[] and ArrayList[] are used for storing Interceptors (as profiler show for hdump).

after 5 minutes:

java.lang.Object[] 314 000 20 2 225 906 4
java.util.Arrays$ArrayList 244 861 15 10 447 443 20
org.jboss.invocation.Interceptor[] 164 467 10 10 434 891 20 jar:file:/home/jbosser/jboss-as-7.1.0.CR1b/modules/org/jboss/invocation/main/jboss-invocation-1.1.1.Final.jar!/
org.jboss.invocation.ChainedInterceptor 162 096 10 10 374 188 20 jar:file:/home/jbosser/jboss-as-7.1.0.CR1b/modules/org/jboss/invocation/main/jboss-invocation-1.1.1.Final.jar!/

after 4 hours:

org.jboss.invocation.Interceptor[] 471 515 16 29 911 864 29 jar:file:/home/jbosser/jboss-as-7.1.0.CR1b/modules/org/jboss/invocation/main/jboss-invocation-1.1.1.Final.jar!/
org.jboss.invocation.ChainedInterceptor 464 587 15 29 733 573 28 jar:file:/home/jbosser/jboss-as-7.1.0.CR1b/modules/org/jboss/invocation/main/jboss-invocation-1.1.1.Final.jar!/
java.util.Arrays$ArrayList 701 093 23 29 913 314 29
java.lang.Object[] 587 660 20 876 557 0

Spring is located in separate module, jsf libraries are used through dependencies.

Application is deployed as single WAR.

WEB-INF\lib:

darkX-3.3.1.GA.jar

javamelody-1.33.0.jar

jrobin-1.5.9.jar

jstl-1.2.jar

richfaces-api-3.3.1.GA.jar

richfaces-impl-3.3.1.GA.jar

richfaces-ui-3.3.1.GA.jar

Thanks in advance for any suggestions.