Catch insanely small timeouts (i.e. it occurs before we even start to execute the command), PR 23992

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@275563 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/optional/ssh/SSHExec.java

@@ -65,6 +65,7 @@ import java.io.IOException;
 import java.io.StringReader;
 
 import com.jcraft.jsch.ChannelExec;
+import com.jcraft.jsch.JSchException;
 import com.jcraft.jsch.Session;
 
 /**
@@ -93,6 +94,9 @@ public class SSHExec extends SSHBase {
     private File outputFile = null;   // like <exec>
     private boolean append = false;   // like <exec>
 
+    private static final String TIMEOUT_MESSAGE = 
+        "Timeout period exceeded, connection dropped.";
+
     /**
      * Constructor for SSHExecTask.
      */
@@ -205,7 +209,7 @@ public class SSHExec extends SSHBase {
             if (thread.isAlive()) {
                 // ran out of time
                 thread = null;
-                log("Timeout period exceeded, connection dropped.");
+                log(TIMEOUT_MESSAGE, Project.MSG_ERR);
             } else {
                 // completed successfully
                 if (outputProperty != null) {
@@ -227,9 +231,19 @@ public class SSHExec extends SSHBase {
                     }
                 }
             }
-
         } catch (BuildException e) {
             throw e;
+        } catch (JSchException e) {
+            if (e.getMessage().indexOf("session is down") >= 0) {
+                log(TIMEOUT_MESSAGE, Project.MSG_ERR);
+            } else {
+                if (getFailonerror()) {
+                    throw new BuildException(e);
+                } else {
+                    log("Caught exception: " + e.getMessage(), 
+                        Project.MSG_ERR);
+                }
+            }
         } catch (Exception e) {
             if (getFailonerror()) {
                 throw new BuildException(e);