18941: Need to leave some space for current block

Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <peter.amstutz@curii.com>

diff --git a/services/fuse/arvados_fuse/fusedir.py b/services/fuse/arvados_fuse/fusedir.py
index 1406c4e4ad4ee48b893d9627ec6249d5a1065650..8dcde59ec336e2ba4cb872f7a7fbdc2faa755807 100644 (file)
--- a/services/fuse/arvados_fuse/fusedir.py
+++ b/services/fuse/arvados_fuse/fusedir.py
@@ -525,17 +525,18 @@ class CollectionDirectory(CollectionDirectoryBase):
                         self.collection.update()
                         new_collection_record = self.collection.api_response()
                     else:
+                        get_threads = max(self.api.keep.block_cache.cache_max // (64 * 1024 * 1024)) - 1, 0)
                         # Create a new collection object
                         if uuid_pattern.match(self.collection_locator):
                             coll_reader = arvados.collection.Collection(
                                 self.collection_locator, self.api, self.api.keep,
                                 num_retries=self.num_retries,
-                                get_threads=(self.api.keep.block_cache.cache_max // (64 * 1024 * 1024)))
+                                get_threads=get_threads)
                         else:
                             coll_reader = arvados.collection.CollectionReader(
                                 self.collection_locator, self.api, self.api.keep,
                                 num_retries=self.num_retries,
-                                get_threads=(self.api.keep.block_cache.cache_max // (64 * 1024 * 1024))
+                                get_threads=get_threads)
                             )
                         new_collection_record = coll_reader.api_response() or {}
                         # If the Collection only exists in Keep, there will be no API