Jackson cannot serialize unmodifiableCollection

Author: bbimber

SequenceAnalysis/src/org/labkey/sequenceanalysis/pipeline/SequenceJob.java

@@ -138,7 +138,7 @@ public SequenceJob(String providerName, Container c, User u, @Nullable String jo
         writeParameters(params);
 
         _folderFileRoot = c.isWorkbook() ? PipelineService.get().findPipelineRoot(c.getParent()) : pipeRoot;
-        _dockerVolumes = SequencePipelineService.get().getDockerVolumes(c);
+        _dockerVolumes = new HashSet<>(SequencePipelineService.get().getDockerVolumes(c));
 
         setLogFile(_getLogFile());
         writeSupportToDisk();