fix: retry _poll_task on transient 599 instead of aborting immediately

DirSize for large directories (e.g. /docker, 8441 folders, 46832 files)
takes ~800ms to compute. While running, status returns intermediate
progress (finished=false). But on the very first poll the task can return
599 transiently (task just started, not yet available). Previously
_poll_task caught any SynologyError and returned immediately, making
dir_size always fail on the first 599.

Fix: treat 599 as a transient condition and continue polling. Give up
only after 5 consecutive 599 responses. All other error codes remain
immediately fatal.

Investigation confirmed with test_dirsize_md5.py:
- /test-mcp (2937 B): finished=true at 0ms
- /docker (3.9 GB, 46832 files): finished=false at 35ms, finished=true at 789ms

Tests: 2 new cases (retry-succeeds, 5x-599-gives-up) → 95 total

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

This commit is contained in:

Marcus van Elst

2026-04-14 13:01:27 +02:00

parent 4d8eae752d

commit e3fa71b458

5 changed files with 113 additions and 104 deletions

									
										pyproject.toml
									
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		-1
	
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				@@ -1,6 +1,6 @@

				[project]

				name = "mcp-synology-filestation"

				version = "0.2.1"

				version = "0.2.2"

				description = "MCP server for Synology FileStation"

				requires-python = ">=3.12"

				dependencies = [