Address review comments

src/binaries/query/main.rs

@@ -76,8 +76,7 @@ async fn main(_global_tracker: Arc<RuntimeTracker>) -> common_exception::Result<
     set_panic_hook();
 
     #[cfg(not(target_os = "macos"))]
-    // Try to set max open files.
-    try_set_max_open_files();
+    check_max_open_files();
 
     GlobalServices::init(conf.clone()).await?;
     let mut shutdown_handle = ShutdownHandle::create()?;
@@ -259,12 +258,20 @@ fn run_cmd(conf: &Config) -> bool {
 }
 
 #[cfg(not(target_os = "macos"))]
-fn try_set_max_open_files() {
-    let limits = get_own_limits().unwrap();
+fn check_max_open_files() {
+    let limits = match get_own_limits() {
+        Ok(limits) => limits,
+        Err(err) => {
+            warn!("get system limit of databend-query failed: {:?}", err);
+            return;
+        }
+    };
     let max_open_files_limit = limits.max_open_files.soft;
     if let Some(max_open_files) = max_open_files_limit {
         if max_open_files < 65535 {
-            warn!("The open file limit is too low for the databend-query. Please consider increase it by running `ulimit -n 65535`");
+            warn!(
+                "The open file limit is too low for the databend-query. Please consider increase it by running `ulimit -n 65535`"
+            );
         }
     }
 }