check if response is already committed on error

CHANGELOG.md

@@ -2,6 +2,11 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 # Changelog for Common Smartgears
 
+## [v3.0.2] - 2020-03-01
+
+- check if response  is already committed on error
+
+
 ## [v3.0.1] - 2020-11-18
 
 - new Uma Token integration

pom.xml

@@ -11,7 +11,7 @@
 
 	<groupId>org.gcube.core</groupId>
 	<artifactId>common-smartgears</artifactId>
-	<version>3.0.1</version>
+	<version>3.0.2-SNAPSHOT</version>
 	<name>SmartGears</name>
 
 	<dependencyManagement>

src/main/java/org/gcube/smartgears/managers/RequestManager.java

@@ -98,7 +98,7 @@ public class RequestManager implements Filter {
 				// dispatch to other filters for this servlet
 				chain.doFilter(request, response);
 			}catch(ServletException t){
-				log.error("error in doFilter",t.getRootCause());
+				log.error("error in doFilter",t);
 				handleError(httprequest,httpresponse,t.getRootCause());
 			}
 			
@@ -260,7 +260,8 @@ public class RequestManager implements Filter {
 					RequestException.class.cast(t).error():
 						application_error;
 
-			response.resetBuffer();		
+			if (!response.isCommitted())
+				response.resetBuffer();		
 			if (error == request_not_authorized_error){
 				response.setHeader("WWW-Authenticate", "Basic realm=\"Smartgears\"");
 				log.info("setting WWW-Authenticate to response header");