Dead lock in CitationImpl

"http-8080-2" daemon prio=6 tid=0x4cf12000 nid=0x7dc waiting for monitor entry [0x4e94d000..0x4e94fb98]
   java.lang.Thread.State: BLOCKED (on object monitor)
    at org.geotools.metadata.iso.citation.CitationImpl.getIdentifiers(CitationImpl.java:292)
    - waiting to lock <0x07c332b0> (a org.geotools.metadata.iso.citation.CitationImpl)
    at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.geotools.metadata.PropertyAccessor.get(PropertyAccessor.java:339)
    at org.geotools.metadata.PropertyAccessor.shallowEquals(PropertyAccessor.java:420)
    at org.geotools.metadata.MetadataStandard.shallowEquals(MetadataStandard.java:283)
    at org.geotools.metadata.AbstractMetadata.equals(AbstractMetadata.java:160)
    - locked <0x078fdb20> (a org.geotools.metadata.iso.citation.CitationImpl)
    at org.geotools.resources.Utilities.equals(Utilities.java:53)
    at org.geotools.referencing.NamedIdentifier.equals(NamedIdentifier.java:670)
    at org.geotools.resources.Utilities.equals(Utilities.java:53)
    at org.geotools.referencing.AbstractIdentifiedObject.equals(AbstractIdentifiedObject.java:858)
    at org.geotools.referencing.AbstractReferenceSystem.equals(AbstractReferenceSystem.java:164)
    at org.geotools.referencing.crs.AbstractCRS.equals(AbstractCRS.java:159)
    at org.geotools.referencing.crs.AbstractSingleCRS.equals(AbstractSingleCRS.java:154)
    at org.geotools.referencing.AbstractIdentifiedObject.equals(AbstractIdentifiedObject.java:824)
    at org.vfny.geoserver.global.GeoServerFeatureSource.reprojectFeatureCollection(GeoServerFeatureSource.java:396)
    (...)

"http-8080-1" daemon prio=6 tid=0x4ce4a400 nid=0x1248 waiting for monitor entry [0x4e8cd000..0x4e8cfc98]
   java.lang.Thread.State: BLOCKED (on object monitor)
    at org.geotools.metadata.iso.citation.CitationImpl.getIdentifiers(CitationImpl.java:292)
    - waiting to lock <0x078fdb20> (a org.geotools.metadata.iso.citation.CitationImpl)
    at sun.reflect.GeneratedMethodAccessor35.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.geotools.metadata.PropertyAccessor.get(PropertyAccessor.java:339)
    at org.geotools.metadata.PropertyAccessor.shallowEquals(PropertyAccessor.java:420)
    at org.geotools.metadata.MetadataStandard.shallowEquals(MetadataStandard.java:283)
    at org.geotools.metadata.AbstractMetadata.equals(AbstractMetadata.java:160)
    - locked <0x07c332b0> (a org.geotools.metadata.iso.citation.CitationImpl)
    at org.geotools.resources.Utilities.equals(Utilities.java:53)
    at org.geotools.referencing.NamedIdentifier.equals(NamedIdentifier.java:670)
    at org.geotools.resources.Utilities.equals(Utilities.java:53)
    at org.geotools.referencing.AbstractIdentifiedObject.equals(AbstractIdentifiedObject.java:858)
    at org.geotools.referencing.AbstractReferenceSystem.equals(AbstractReferenceSystem.java:164)
    at org.geotools.referencing.crs.AbstractCRS.equals(AbstractCRS.java:159)
    at org.geotools.referencing.crs.AbstractSingleCRS.equals(AbstractSingleCRS.java:154)
    at org.geotools.referencing.AbstractIdentifiedObject.equals(AbstractIdentifiedObject.java:824)
    at org.geotools.data.crs.ForceCoordinateSystemFeatureResults.forceType(ForceCoordinateSystemFeatureResults.java:95)
    (...)