lucaong
commented
1 month ago Hi @eminarcissus , the error looks very strange:
** (Protocol.UndefinedError) protocol Enumerable not implemented for %CubDB.BtreeThe Btree module does implement the Enumerable protocol. I am not sure what is happening here.
Could you tell me more about your setup? What kind of device is CubDB running on (an embedded device or a standard computer)? Are you doing some kind of hot code reloading, or anything "unusual"?
Thank you for your report!
I'm using. the most basic setups without any configuration and just fire up a file db in the GenServer init period, afterwards I do periodically handling GenServer's timeout to maintain the database status. But after a while I started to see the following errors.
** (Protocol.UndefinedError) protocol Enumerable not implemented for %CubDB.Btree{root: {:l, [valid_c: 257041, valid_c_timestamp: 271377, valid_i: 252945, valid_i_timestamp: 256017]}, root_loc: 271396, size: 4, dirt: 107, store: %CubDB.Store.File{pid: #PID<0.243.0>, file_path: "/home/lk/p_manage/_build/dev/lib/p_manage/priv/db/0.cub"}, capacity: 32} of type CubDB.Btree (a struct). This protocol is implemented for the following type(s): Date.Range, File.Stream, Function, GenEvent.Stream, HashDict, HashSet, IO.Stream, List, Map, MapSet, Range, Stream (elixir 1.16.3) lib/enum.ex:1: Enumerable.impl_for!/1 (elixir 1.16.3) lib/enum.ex:166: Enumerable.reduce/3 (elixir 1.16.3) lib/enum.ex:4396: Enum.reduce/3 (cubdb 2.0.2) lib/cubdb/btree.ex:88: CubDB.Btree.load/3 (cubdb 2.0.2) lib/cubdb/compactor.ex:46: CubDB.Compactor.compact/2 (cubdb 2.0.2) lib/cubdb/compactor.ex:33: anonymous fn/2 in CubDB.Compactor.run/2
I'm using CubDB for some simple KV pairs for runtime configuration and data storage. while I'm keep updating on 2 keys with Poison encoded jsons. In the beginning it works without problem, but after a period of time it starts to raise the above errors. Looks more likely to be compact time error.
The structure of the stored content is [valid_c: 257041, valid_c_timestamp: 271377, valid_i: 252945, valid_i_timestamp: 256017],where timestamp are coming from :os.system_time(:millisecond) and valid_c/valid_i are Poison encoded json of a list of strings.
Is there anything I missed in configuration? Any hints would be real appreciatd.