diff --git a/plugins/gradle/src/org/jetbrains/plugins/gradle/service/task/GradleTaskManager.java b/plugins/gradle/src/org/jetbrains/plugins/gradle/service/task/GradleTaskManager.java
index a579699b8887..f0fc48bebe70 100644
--- a/plugins/gradle/src/org/jetbrains/plugins/gradle/service/task/GradleTaskManager.java
+++ b/plugins/gradle/src/org/jetbrains/plugins/gradle/service/task/GradleTaskManager.java
@@ -122,8 +122,11 @@ public class GradleTaskManager extends AbstractExternalSystemTaskManager<GradleE
   public boolean cancelTask(@NotNull ExternalSystemTaskId id, @NotNull ExternalSystemTaskNotificationListener listener)
     throws ExternalSystemException {
 
-    for (GradleTaskManagerExtension gradleTaskManagerExtension : GradleTaskManagerExtension.EP_NAME.getExtensions()) {
-      if (gradleTaskManagerExtension.cancelTask(id, listener)) return true;
+    // extension points are available only in IDE process
+    if (ExternalSystemApiUtil.isInProcessMode(GradleConstants.SYSTEM_ID)) {
+      for (GradleTaskManagerExtension gradleTaskManagerExtension : GradleTaskManagerExtension.EP_NAME.getExtensions()) {
+        if (gradleTaskManagerExtension.cancelTask(id, listener)) return true;
+      }
     }
 
     // TODO replace with cancellation gradle API invocation when it will be ready, see http://issues.gradle.org/browse/GRADLE-1539