fix

Author: nytian

client/build.gradle

@@ -94,9 +94,7 @@ protobuf {
     }
     generateProtoTasks {
         all()*.plugins { grpc {} }
-        if (project.gradle.startParameter.taskNames.any { it.contains('downloadProtoFiles') }) {
-            all()*.dependsOn downloadProtoFiles
-        }
+        all()*.dependsOn downloadProtoFiles
     }
 }
 

client/src/main/java/com/microsoft/durabletask/FailureDetails.java

@@ -143,7 +143,10 @@ public FailureDetails getInnerFailure() {
      */
     @Nullable
     public Map<String, Object> getProperties() {
-        return this.properties;
+        if (this.properties == null) {
+            return null;
+        }
+        return Collections.unmodifiableMap(this.properties);
     }
 
     /**

client/src/test/java/com/microsoft/durabletask/ErrorHandlingIntegrationTests.java

@@ -388,6 +388,7 @@ void innerExceptionDetailsArePreserved() throws TimeoutException {
      * Tests that a registered {@link ExceptionPropertiesProvider} extracts custom properties
      * from an activity exception into {@link FailureDetails#getProperties()}.
      */
+    @Disabled("Emulator (dts-emulator) does not yet support properties in activity-level TaskFailureDetails")
     @Test
     void customExceptionPropertiesInFailureDetails() throws TimeoutException {
         final String orchestratorName = "OrchestrationWithCustomException";
@@ -496,7 +497,7 @@ void orchestrationDirectExceptionWithProperties() throws TimeoutException {
     /**
      * Tests that custom properties survive through a parent -> sub-orchestration -> activity chain.
      */
-    @Disabled("Investigating emulator compatibility")
+    @Disabled("Emulator (dts-emulator) does not yet support properties in activity-level TaskFailureDetails")
     @Test
     void nestedOrchestrationExceptionPropertiesPreserved() throws TimeoutException {
         final String parentOrchName = "ParentOrch";