From ad652ffb97cfdf6d866352a37992ece1c1870248 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Tue, 20 Oct 2020 22:54:34 -0700
Subject: [PATCH] avoid close closed channel

---
 weed/filesys/filehandle.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/weed/filesys/filehandle.go b/weed/filesys/filehandle.go
index 0304eebb4..412d7e73f 100644
--- a/weed/filesys/filehandle.go
+++ b/weed/filesys/filehandle.go
@@ -185,8 +185,10 @@ func (fh *FileHandle) Release(ctx context.Context, req *fuse.ReleaseRequest) err
 	}
 
 	// stop the goroutine
-	fh.dirtyPages.chunkSaveErrChanClosed = true
-	close(fh.dirtyPages.chunkSaveErrChan)
+	if !fh.dirtyPages.chunkSaveErrChanClosed {
+		fh.dirtyPages.chunkSaveErrChanClosed = true
+		close(fh.dirtyPages.chunkSaveErrChan)
+	}
 
 	return nil
 }