diff --git a/spring-batch-core/src/main/java/org/springframework/batch/core/step/tasklet/StoppableTasklet.java b/spring-batch-core/src/main/java/org/springframework/batch/core/step/tasklet/StoppableTasklet.java
index 21f357a93..362866c56 100644
--- a/spring-batch-core/src/main/java/org/springframework/batch/core/step/tasklet/StoppableTasklet.java
+++ b/spring-batch-core/src/main/java/org/springframework/batch/core/step/tasklet/StoppableTasklet.java
@@ -23,7 +23,10 @@ import org.springframework.batch.core.launch.JobOperator;
  * as to how the stop will behave.  The only guarantee provided by the
  * framework is that a call to {@link JobOperator#stop(long)} will
  * attempt to call the stop method on any currently running
- * StoppableTasklet.
+ * StoppableTasklet.  The call to {@link StoppableTasklet#stop()} will
+ * be from a thread other than the thread executing {@link org.springframework.batch.core.step.tasklet.Tasklet#execute(org.springframework.batch.core.StepContribution, org.springframework.batch.core.scope.context.ChunkContext)}
+ * so the appropriate thread safety and visibility controls should be
+ * put in place.
  *
  * @author Will Schipp
  * @since 3.0
diff --git a/spring-batch-core/src/main/java/org/springframework/batch/core/step/tasklet/SystemCommandTasklet.java b/spring-batch-core/src/main/java/org/springframework/batch/core/step/tasklet/SystemCommandTasklet.java
index ba437cc47..1fd71b975 100644
--- a/spring-batch-core/src/main/java/org/springframework/batch/core/step/tasklet/SystemCommandTasklet.java
+++ b/spring-batch-core/src/main/java/org/springframework/batch/core/step/tasklet/SystemCommandTasklet.java
@@ -16,10 +16,6 @@
 
 package org.springframework.batch.core.step.tasklet;
 
-import java.io.File;
-import java.util.concurrent.Callable;
-import java.util.concurrent.FutureTask;
-
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.springframework.batch.core.ExitStatus;
@@ -34,6 +30,10 @@ import org.springframework.core.task.SimpleAsyncTaskExecutor;
 import org.springframework.core.task.TaskExecutor;
 import org.springframework.util.Assert;
 
+import java.io.File;
+import java.util.concurrent.Callable;
+import java.util.concurrent.FutureTask;
+
 /**
  * {@link Tasklet} that executes a system command.
  *
@@ -78,7 +78,7 @@ public class SystemCommandTasklet extends StepExecutionListenerSupport implement
 
 	private boolean interruptOnCancel = false;
 
-	private boolean stopped = false;
+	private volatile boolean stopped = false;
 
 	/**
 	 * Execute system command and map its exit code to {@link ExitStatus} using