Serge reported the following:

Today, I took a look at the dna-example-sequencers and ran the "SequencingClientTest" test. But unfortunately shouldUploadAndSequencePngFile, shouldUploadAndSequenceJpegFile, shouldUploadAndSequencePictFile all fail with this exception:

11:51:03,806 ERROR Error in repository while sequencer Image Sequencer is sequencing node repo/default=>/a/b/caution.png/jcr:content
javax.jcr.nodetype.ConstraintViolationException: cannot set the value of a protected property /images/caution.png/image:metadata/jcr:primaryType
at org.apache.jackrabbit.core.PropertyImpl.checkSetValue(PropertyImpl.java:224)
at org.apache.jackrabbit.core.PropertyImpl.setValue(PropertyImpl.java:775)
at org.apache.jackrabbit.core.NodeImpl.setProperty(NodeImpl.java:2211)
at org.jboss.dna.repository.sequencers.StreamSequencerAdapter.saveOutput(StreamSequencerAdapter.java:230)
at org.jboss.dna.repository.sequencers.StreamSequencerAdapter.execute(StreamSequencerAdapter.java:154)
at org.jboss.dna.repository.sequencers.SequencingService.processChangedNode(SequencingService.java:576)
at org.jboss.dna.repository.sequencers.SequencingService$1.run(SequencingService.java:484)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:613)
11:51:04,988 ERROR Error in repository while sequencer Image Sequencer is sequencing node repo/default=>/a/b/caution.jpeg/jcr:content
javax.jcr.nodetype.ConstraintViolationException: cannot set the value of a protected property /images/caution.jpeg/image:metadata/jcr:primaryType
at org.apache.jackrabbit.core.PropertyImpl.checkSetValue(PropertyImpl.java:224)
at org.apache.jackrabbit.core.PropertyImpl.setValue(PropertyImpl.java:775)
at org.apache.jackrabbit.core.NodeImpl.setProperty(NodeImpl.java:2211)
at org.jboss.dna.repository.sequencers.StreamSequencerAdapter.saveOutput(StreamSequencerAdapter.java:230)
at org.jboss.dna.repository.sequencers.StreamSequencerAdapter.execute(StreamSequencerAdapter.java:154)
at org.jboss.dna.repository.sequencers.SequencingService.processChangedNode(SequencingService.java:576)
at org.jboss.dna.repository.sequencers.SequencingService$1.run(SequencingService.java:484)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:613)
11:51:07,693 ERROR Error in repository while sequencer Mp3 Sequencer is sequencing node repo/default=>/a/b/test.mp3/jcr:content
javax.jcr.nodetype.ConstraintViolationException: cannot set the value of a protected property /mp3s/test.mp3/mp3:metadata/jcr:primaryType
at org.apache.jackrabbit.core.PropertyImpl.checkSetValue(PropertyImpl.java:224)
at org.apache.jackrabbit.core.PropertyImpl.setValue(PropertyImpl.java:775)
at org.apache.jackrabbit.core.NodeImpl.setProperty(NodeImpl.java:2211)
at org.jboss.dna.repository.sequencers.StreamSequencerAdapter.saveOutput(StreamSequencerAdapter.java:230)
at org.jboss.dna.repository.sequencers.StreamSequencerAdapter.execute(StreamSequencerAdapter.java:154)
at org.jboss.dna.repository.sequencers.SequencingService.processChangedNode(SequencingService.java:576)
at org.jboss.dna.repository.sequencers.SequencingService$1.run(SequencingService.java:484)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:613)