diff --git a/build.sh b/build.sh
index c53a676..21374ed 100644
--- a/build.sh
+++ b/build.sh
@@ -10,10 +10,14 @@
    安装命令：
    git clone https://github.com/gflags/gflags.git
    cd gflags
-   git checkout v2.0
-   ./configure && make && sudo make install
+   git checkout -b 2.2 v2.2.2
+   cmake -DCMAKE_INSTALL_PREFIX=/usr/local -DBUILD_SHARED_LIBS=ON -DGFLAGS_NAMESPACE=google -G "Unix Makefiles" .
+   make && sudo make install
+   sudo ldconfig
+   sudo ln -s /usr/local/lib/libgflags.so.2.2 /lib64
    安装后，需要将gflags的包含路径添加到你的CPATH环境变量中
 5）安装rocksdb依赖库：zlib，bzip2，lz4，snappy，zstandard
+   sudo yum install -y snappy snappy-devel zlib zlib-devel bzip2 bzip2-devel lz4-devel libasan openssl-devel
 '
 
 localdir=`pwd`
diff --git a/src/search_local/index_write/index_tbl_op.cc b/src/search_local/index_write/index_tbl_op.cc
index fa07c48..f350f61 100644
--- a/src/search_local/index_write/index_tbl_op.cc
+++ b/src/search_local/index_write/index_tbl_op.cc
@@ -309,7 +309,7 @@ int CIndexTableManager::do_insert_intelligent(string key, string doc_id, string
 		IntelligentInfo info = *iter;
 		DTC::Result rst;
 		ret = insert_intelligent_execute(dtcServer, key, doc_id, word, info, rst, doc_version);
-		if (ret != 0)
+		if (ret != 0 && ret != -1062) // duplicate is ok
 		{
 			log_error("insert request error! ,errno %d ,errmsg %s, errfrom %s\n", ret, rst.ErrorMessage(), rst.ErrorFrom());
 			return -1;