{"version":"2.1.251","anchor":"file-permission-checks-now-fail-loudly-under-heavy-concurren","canonical_anchor":"file-permission-checks-now-fail-loudly-under-heavy-concurren","heading":"File permission checks now fail loudly under heavy concurrency","tier":"notice","area":"Permissions","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.251\/e\/file-permission-checks-now-fail-loudly-under-heavy-concurren","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.251","markdown":"### File permission checks now fail loudly under heavy concurrency\n\nUnder heavy file activity a permission check can expire and ask you to retry rather than skip.\n\n**What**\n\nThe short-lived cache holding approved file paths now keeps writes and reads in separate lanes and detects when entries are dropped before use. If too many are dropped, the next file operation fails with \"its permission check expired before it ran (too many concurrent file operations). Retry.\" rather than proceeding without a fresh check.\n\n**Details**\n\n- Always on. The lane holds up to 256 entries and tracks up to 1048576 dropped keys.\n- The error is retryable, so the operation can simply be run again.\n\n**Evidence**\n\n`its permission check expired before it ran (too many concurrent file operations). Retry.`\n\n- Area: Permissions\n- Tier: You'll notice\n- Useful: 3\/5\n- Signal: 3\/5"}