diff --git a/cpp/CMakeLists.txt b/cpp/CMakeLists.txt
index 4fffe6622074f183d92663d7b9ce06f609bc0805..cc807d43ed4cfa238283566f8a8fb9bf7f1c12b8 100644
--- a/cpp/CMakeLists.txt
+++ b/cpp/CMakeLists.txt
@@ -44,7 +44,6 @@ set(MILVUS_VERSION "${GIT_BRANCH_NAME}")
 string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]" MILVUS_VERSION "${MILVUS_VERSION}")
 
 find_package(ClangTools)
-set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 set(BUILD_SUPPORT_DIR "${CMAKE_SOURCE_DIR}/build-support")
 
 if(CMAKE_BUILD_TYPE STREQUAL "Release")
@@ -57,6 +56,9 @@ message(STATUS "Build type = ${BUILD_TYPE}")
 project(milvus VERSION "${MILVUS_VERSION}")
 project(milvus_engine LANGUAGES CUDA CXX)
 
+unset(CMAKE_EXPORT_COMPILE_COMMANDS CACHE)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
 set(MILVUS_VERSION_MAJOR "${milvus_VERSION_MAJOR}")
 set(MILVUS_VERSION_MINOR "${milvus_VERSION_MINOR}")
 set(MILVUS_VERSION_PATCH "${milvus_VERSION_PATCH}")
diff --git a/cpp/build-support/lint_exclusions.txt b/cpp/build-support/lint_exclusions.txt
index 3ae6878c43764ed112254ed9b554cce669532cb2..f08664a1a9b6cf578525a7e7fc3192a7a1085ce4 100644
--- a/cpp/build-support/lint_exclusions.txt
+++ b/cpp/build-support/lint_exclusions.txt
@@ -3,4 +3,5 @@
 *cmake_build*
 *src/thirdparty*
 *src/core/thirdparty*
-*src/grpc*
\ No newline at end of file
+*src/grpc*
+*easylogging++*
\ No newline at end of file
diff --git a/cpp/build-support/run_cpplint.py b/cpp/build-support/run_cpplint.py
index 2a33748279524a52a073426bf256a03b1c53a108..98c417085834cf6eb4e7ec2482e32dd985ee2afc 100755
--- a/cpp/build-support/run_cpplint.py
+++ b/cpp/build-support/run_cpplint.py
@@ -84,7 +84,7 @@ if __name__ == "__main__":
     cmd = [
         arguments.cpplint_binary,
         '--verbose=2',
-        '--linelength=90',
+        '--linelength=120',
         '--filter=' + ','.join(_filters)
     ]
     if (arguments.cpplint_binary.endswith('.py') and