diff --git a/python/examples/pipeline/ocr/hybrid_service_pipeline_server.py b/python/examples/pipeline/ocr/hybrid_service_pipeline_server.py
index 0a875c71a60495bd429b20daa7df442f4cf05543..1eea9c3b36f74d04c74618a2012810a1a58d411e 100644
--- a/python/examples/pipeline/ocr/hybrid_service_pipeline_server.py
+++ b/python/examples/pipeline/ocr/hybrid_service_pipeline_server.py
@@ -129,7 +129,7 @@ rec_op = RecOp(
     concurrency=1)
 response_op = ResponseOp(input_ops=[rec_op])
 
-server = PipelineServer()
+server = PipelineServer("ocr")
 server.set_response_op(response_op)
 server.prepare_server('config.yml')
 server.run_server()
diff --git a/python/examples/pipeline/ocr/local_service_pipeline_server.py b/python/examples/pipeline/ocr/local_service_pipeline_server.py
index e3ebc07fe9483d8962d32f6aa28765ba38d3fcdc..ccbd3b1b07a30422583812b659e1c249b37bcb9e 100644
--- a/python/examples/pipeline/ocr/local_service_pipeline_server.py
+++ b/python/examples/pipeline/ocr/local_service_pipeline_server.py
@@ -128,7 +128,7 @@ rec_op = RecOp(
     concurrency=1)
 response_op = ResponseOp(input_ops=[rec_op])
 
-server = PipelineServer()
+server = PipelineServer("ocr")
 server.set_response_op(response_op)
 server.prepare_server('config.yml')
 server.run_server()
diff --git a/python/examples/pipeline/ocr/remote_service_pipeline_server.py b/python/examples/pipeline/ocr/remote_service_pipeline_server.py
index b1eb50bdbb6e72ac534c432c3a8ce0954dff9e9d..170e6dd9c4687e10bb4af6278f2f5b0c9ac09878 100644
--- a/python/examples/pipeline/ocr/remote_service_pipeline_server.py
+++ b/python/examples/pipeline/ocr/remote_service_pipeline_server.py
@@ -123,7 +123,7 @@ rec_op = RecOp(
     concurrency=1)
 response_op = ResponseOp(input_ops=[rec_op])
 
-server = PipelineServer()
+server = PipelineServer("ocr")
 server.set_response_op(response_op)
 server.prepare_server('config.yml')
 server.run_server()