From 44df7b00cee7997769b3be3cb57d194a11d0f4d4 Mon Sep 17 00:00:00 2001
From: Bill Katz <billkatz@gmail.com>
Date: Thu, 28 Nov 2024 23:32:56 -0500
Subject: [PATCH] gridstore: close write channels before end

---
 datatype/imageblk/imageblk.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/datatype/imageblk/imageblk.go b/datatype/imageblk/imageblk.go
index 791a230b..2da65001 100644
--- a/datatype/imageblk/imageblk.go
+++ b/datatype/imageblk/imageblk.go
@@ -1930,6 +1930,7 @@ func (d *Data) SendGridBlocks(w http.ResponseWriter, blockCoords []dvid.ChunkPoi
 		}
 		writeCh <- &storage.Block{Coord: blockCoord, Value: value}
 	}
+	close(writeCh)
 	writeWg.Wait()
 	return nil
 }
@@ -1962,6 +1963,7 @@ func (d *Data) SendGridVolume(w http.ResponseWriter, subvol *dvid.Subvolume, gri
 		}
 		return nil
 	})
+	close(writeCh)
 	writeWg.Wait()
 	return err
 }