morningman commented on a change in pull request #7050:
URL: https://github.com/apache/incubator-doris/pull/7050#discussion_r744755540



##########
File path: be/src/exec/hdfs_file_reader.cpp
##########
@@ -80,7 +80,7 @@ Status HdfsFileReader::open() {
     _hdfs_file = hdfsOpenFile(_hdfs_fs, _path.c_str(), O_RDONLY, 0, 0, 0);
     if (_hdfs_file == nullptr) {
         std::stringstream ss;
-        ss << "open file failed. " << _namenode << _path;
+        ss << "open file failed. " << _namenode << _path << ", err: " << 
strerror(errno);;

Review comment:
       Also add BE ip info so that we can easily find which BE report the error.
   You can call `BackendOptions::get_localhost();`

##########
File path: be/test/exprs/bitmap_function_test.cpp
##########
@@ -866,6 +866,61 @@ TEST_F(BitmapFunctionsTest, bitmap_subset_limit) {
 
 }
 
+TEST_F(BitmapFunctionsTest, bitmap_subset_limit) {

Review comment:
       Why there is bitmap unit test in this PR?




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