handle AbortException gracefully without spewing a stack trace.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@33855 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/TcpSlaveAgentListener.java

@@ -249,6 +249,10 @@ public final class TcpSlaveAgentListener extends Thread {
                             }
                         }
                     });
+            } catch (AbortException e) {
+                logw.println(e.getMessage());
+                logw.println("Failed to establish the connection with the slave");
+                throw e;
             } catch (IOException e) {
                 logw.println("Failed to establish the connection with the slave"); 
                 e.printStackTrace(logw);