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2019-05-13 11:27:32,139 INFO [STDOUT] Exception ocumentHandlerEJB :saveDocument :==>org.apache.chemistry.opencmis.commons.exceptions.CmisConnectionException: Cannot access http://172.16.10.142:8080/alfresco/api/-default-/public/cmis/versions/1.0/atom/path?path=/User+Homes/SP801/ITDECL/1000458156/LIC-4.pdf&filter=&includeAllowableActions=true&includeACL=false&includePolicyIds=false&includeRelationships=none&renditionFilter=cmis:none: Connection reset2019-05-13 11:27:32,139 ERROR [STDERR] org.apache.chemistry.opencmis.commons.exceptions.CmisConnectionException: Cannot access http://172.16.10.142:8080/alfresco/api/-default-/public/cmis/versions/1.0/atom/path?path=/User+Homes/SP801/ITDECL/1000458156/LIC-4.pdf&filter=&includeAllowableActions=true&includeACL=false&includePolicyIds=false&includeRelationships=none&renditionFilter=cmis:none: Connection reset
Please move this qustion to a proper forum. I think it's not related to ADF and Angular.
Are you able to hit the CMIS endpoint using curl from whatever machine this is?